CN115780459A - Kitchen waste and sludge treatment system and operation method thereof - Google Patents
Kitchen waste and sludge treatment system and operation method thereof Download PDFInfo
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- CN115780459A CN115780459A CN202310029906.5A CN202310029906A CN115780459A CN 115780459 A CN115780459 A CN 115780459A CN 202310029906 A CN202310029906 A CN 202310029906A CN 115780459 A CN115780459 A CN 115780459A
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- 239000010806 kitchen waste Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 55
- 239000001301 oxygen Substances 0.000 claims abstract description 55
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 51
- 239000000446 fuel Substances 0.000 claims abstract description 33
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- 239000010813 municipal solid waste Substances 0.000 claims abstract description 24
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- 238000005538 encapsulation Methods 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002912 waste gas Substances 0.000 claims description 15
- 238000004806 packaging method and process Methods 0.000 claims description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 7
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Abstract
The invention relates to the technical field of waste treatment, and provides a treatment system for kitchen garbage and sludge and an operation method thereof. The system comprises the following devices: hydrothermal reaction kettle, fuel reactor, air reactor, steam turbine, generator, carbon trapping device, carbon encapsulation storage device. According to the invention, the kitchen waste after drying and crushing pretreatment is placed in a hydrothermal reaction kettle for hydrothermal carbonization reaction, so that the efficient utilization of the kitchen waste is completed; meanwhile, the reaction efficiency is improved by using hydrothermal carbon as fuel and oxygen transported between reaction beds through a chemical chain oxygen decoupling combustion technology; finally, the invention utilizes CO 2 The cyclic power generation technology realizes the CO pairing 2 The processing cost is increased. The invention realizes the technical purpose of cooperative treatment of the kitchen waste and the sludge while processing the kitchen waste in a large scale, realizes resource utilization of various solid wastes to the maximum extent, and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of waste treatment, in particular to a kitchen garbage and sludge treatment system and an operation method thereof.
Background
With the improvement of economic level and living conditions of people, the amount of leftover food produced in kitchens, restaurants and other places is continuously increased, so that the output of kitchen waste is increased day by day. The kitchen garbage contains a large amount of organic matters, is easy to deteriorate, mildew and rot, releases a large amount of malodorous gases, and causes pollution and damage to the surrounding ecological environment. For kitchen waste, most areas of China adopt a landfill or incineration method, although the method is convenient, a large amount of organic substances in the kitchen waste are wasted, and a large amount of greenhouse gas CO is caused 2 Is discharged to the atmosphere.
In the prior art, the invention patent CN202011607117.8 discloses a kitchen waste treatment system, which utilizes the chemical reaction of kitchen waste in a reaction kettle to convert the kitchen waste into other products with high added values, so as to reduce organic loss and heat leakage, but the treatment can generate CO in the reaction kettle 2 Greenhouse gases, CO not specified either 2 And (5) carrying out a subsequent treatment scheme. The invention patent CN202111299077.X discloses a treatment method and equipment for household garbage, which adopts solar energy to store heat to maintain the temperature required by microbial degradation, then dries the household garbage to carry out plasma pyrolysis to realize anaerobic carbonization treatment, and utilizes solar energy to treat the garbage, but the solar energy heat storage equipment required by the process flow is expensive and cannot be widely popularized and used on a large scale. The invention patent CN202111090550.3 proposes a high-efficiency combustion-supporting domestic garbage treatment method and a device thereof, wherein external air flow is actively sucked by air suction through a suction shaft arranged in a system and supports combustionThe waste incineration is more efficient, but the heat generated in the equipment cannot be effectively utilized. Therefore, the kitchen waste has a plurality of technical problems in recycling, and a more appropriate treatment scheme is urgently needed to be found.
In addition, the electroplating sludge is waste generated by metal electroplating, circuit board corrosion and other processes. The random discharge of the electroplating sludge is easy to cause pollution to the ecological environment, so that the electroplating sludge needs to be recycled and harmlessly utilized. In conclusion, the method has very important significance in realizing resource utilization and harmless treatment of kitchen garbage and sludge.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a kitchen garbage and sludge treatment system and an operation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a kitchen garbage and sludge treatment system, which comprises the following devices: hydrothermal reaction kettle, fuel reactor, air reactor, steam turbine, generator, carbon trapping device, carbon encapsulation storage device.
The invention also provides an operation method of the processing system, which comprises the following steps:
(1) Carrying out hydrothermal carbonization treatment on the kitchen waste in a hydrothermal reaction kettle to obtain hydrothermal carbon;
(2) Combusting sludge to obtain a sludge ash oxygen carrier;
(3) Mixing hydrothermal carbon and a sludge ash oxygen carrier, and then reacting in a fuel reactor to obtain metal, waste gas, and treated kitchen waste and sludge;
(4) Introducing metal and oxygen into an air reactor for reaction, and returning the obtained oxygen carrier to the fuel reactor for recycling;
(5) And the waste gas passes through the carbon capture device and the carbon packaging and storing device in sequence to realize the sealing and storing of the carbon dioxide.
Preferably, the temperature of the hydrothermal carbonization treatment in the step (1) is 180 to 250 ℃, and the time of the hydrothermal carbonization treatment is 1.5 to 4 hours.
Preferably, the pressure of the hydrothermal carbonization treatment in the step (1) is 2 to 10MPa.
Preferably, the burning temperature in the step (2) is 800-900 ℃, and the burning time is 7-9 h.
Preferably, the sludge ash oxygen carrier in the step (2) contains Fe 2 O 3 And CuFe 2 O 4 。
Preferably, the mass ratio of the hydrothermal carbon to the sludge ash oxygen carrier in the step (3) is 2.5-3.5: 1.
preferably, the reaction temperature of the step (3) is 630-730 ℃, and the reaction time is 0.5-1.5 h.
Preferably, the reaction temperature in the step (4) is 850-950 ℃ and the reaction time is 3-5 h.
The beneficial effects of the invention are:
(1) The invention provides a kitchen garbage and sludge treatment system and an operation method thereof. The system comprises the following devices: hydrothermal reaction kettle, fuel reactor, air reactor, steam turbine, generator, carbon gathering device, carbon encapsulation storage device. The whole system of the invention has reasonable structural design, and finally realizes the resource utilization and harmless treatment of kitchen garbage and sludge.
(2) The kitchen garbage is dried and crushed by a hydrothermal carbonization treatment technology, and then is placed in a hydrothermal reaction kettle for hydrothermal carbonization reaction, so that the kitchen garbage is efficiently utilized; meanwhile, the invention also uses hydrothermal carbon as fuel through chemical chain oxygen decoupling combustion technology, and improves the reaction efficiency of chemical chain combustion through oxygen transported between reaction beds, and finally, the invention utilizes CO 2 The cyclic power generation technology realizes the CO pairing 2 The processing cost is increased. The invention realizes the technical purpose of cooperative treatment of kitchen garbage and sludge while processing the kitchen garbage on a large scale, realizes resource utilization of various solid wastes to the maximum extent, is beneficial to helping to realize the aim of 'double carbon', and has wide application prospect.
Drawings
FIG. 1 is a schematic flow diagram of a processing system according to the present invention.
Detailed Description
The invention provides a kitchen garbage and sludge treatment system, which comprises the following devices: hydrothermal reaction kettle, fuel reactor, air reactor, steam turbine, generator, carbon trapping device, carbon encapsulation storage device.
The invention also provides an operation method of the processing system, which comprises the following steps:
(1) Carrying out hydrothermal carbonization treatment on the kitchen garbage in a hydrothermal reaction kettle to obtain hydrothermal carbon;
(2) Combusting sludge to obtain a sludge ash oxygen carrier;
(3) Mixing hydrothermal carbon and a sludge ash oxygen carrier, and then reacting in a fuel reactor to obtain metal, waste gas, and treated kitchen waste and sludge;
(4) Introducing metal and oxygen into an air reactor for reaction, and returning the obtained oxygen carrier into a fuel reactor for recycling;
(5) And the waste gas passes through the carbon trapping device and the carbon packaging and storing device in sequence to realize the sealing of the carbon dioxide.
In the invention, the kitchen garbage can be rice, bones, leftovers, pericarps and the like.
In the invention, before the hydrothermal carbonization treatment in the step (1), the kitchen waste is preferably dehydrated in a dryer and crushed in a crusher, wherein the dehydration temperature is preferably 100-110 ℃, more preferably 102-108 ℃, and more preferably 104-106 ℃; the dehydration time is preferably 22 to 26 hours, more preferably 23 to 25 hours, and even more preferably 23.5 to 24.5 hours; the particle size of the pulverized material is not more than 100 mesh, more preferably not more than 150 mesh, and still more preferably not more than 200 mesh.
In the present invention, the temperature of the hydrothermal carbonization treatment in step (1) is preferably 180 to 250 ℃, more preferably 190 to 240 ℃, and even more preferably 200 to 230 ℃; the time for the hydrothermal carbonization treatment is preferably 1.5 to 4 hours, more preferably 2 to 3.5 hours, and still more preferably 2.5 to 3 hours.
In the present invention, the pressure of the hydrothermal carbonization treatment in the step (1) is preferably 2 to 10MPa, more preferably 4 to 8MPa, and still more preferably 5 to 7MPa.
In the invention, the hydrothermal carbonization treatment is a thermochemical conversion process of putting a solid raw material in a closed reaction kettle under a certain pressure; in the treatment process, the biomass raw material is subjected to a series of chemical reactions such as hydrolysis, dehydration, decarboxylation, polymerization, aromatization and the like to generate the hydrothermal carbon. The hydrothermal carbonization treatment technology can improve the high-level heat productivity and the energy utilization rate of the kitchen waste to a great extent.
In the invention, after the hydrothermal carbonization treatment is finished, the obtained sample is washed by water and cooled, the obtained system is filtered by using a fiber filter membrane, and then the filter cake is sequentially washed, dried and ground to obtain the hydrothermal carbon.
In the present invention, the target temperature of the cooling is preferably 20 to 30 ℃, more preferably 22 to 28 ℃, and still more preferably 24 to 26 ℃; the pore diameter of the fiber filter membrane is preferably 0.4-0.5 μm, more preferably 0.42-0.48 μm, and even more preferably 0.44-0.46 μm; the degree of vacuum of the filtration is preferably 0.05 to 0.15MPa, more preferably 0.07 to 0.13MPa, and even more preferably 0.09 to 0.11MPa; the washing reagent is deionized water, and the washing frequency is preferably 1 to 3 times, and more preferably 2 times; the drying temperature is preferably 100-120 ℃, more preferably 105-115 ℃, and more preferably 108-112 ℃; the drying time is preferably 46 to 50 hours, more preferably 47 to 49 hours, and even more preferably 47.5 to 48.5 hours; the particle size of the above grinding is preferably 0.35 to 0.833mm, more preferably 0.45 to 0.7mm, and still more preferably 0.55 to 0.6mm.
In the invention, the combustion temperature in the step (2) is preferably 800-900 ℃, more preferably 820-880 ℃, and more preferably 830-870 ℃; the combustion time is preferably 7 to 9 hours, more preferably 7.5 to 8.5 hours, and still more preferably 7.7 to 8.3 hours.
In the invention, the sludge ash oxygen carrier in the step (2) preferably contains Fe 2 O 3 And CuFe 2 O 4 。
In the invention, the mass ratio of the hydrothermal carbon in the step (3) to the sludge ash oxygen carrier is preferably 2.5-3.5: 1, more preferably 2.7 to 3.3:1, more preferably 2.9 to 3.1:1.
in the present invention, the reaction temperature in step (3) is preferably 630 to 730 ℃, more preferably 640 to 720 ℃, and even more preferably 650 to 710 ℃; the time is preferably 0.5 to 1.5 hours, more preferably 0.7 to 1.3 hours, and still more preferably 0.9 to 1.1 hours.
In the invention, the main component in the waste gas in the step (3) is CO 2 。
In the present invention, the oxygen in step (4) is preferably obtained after air passes through an air separation unit.
In the present invention, the temperature of the reaction in step (4) is preferably 850 to 950 ℃, more preferably 870 to 930 ℃, and still more preferably 890 to 910 ℃; the time is preferably 3 to 5 hours, more preferably 3.5 to 4.5 hours, and still more preferably 3.7 to 4.3 hours.
In the invention, the step (3) and the step (4) belong to a chemical chain oxygen decoupling technology, which is a novel fuel utilization technology, and the sludge oxygen carrier is used as a medium to circularly transport oxygen in a fuel reactor and an air reactor, thereby improving the reaction rate in the fuel reactor.
In the invention, the hydrothermal carbon and the sludge ash oxygen carrier are mixed and then react in the fuel reactor, the oxygen carrier reacts to generate metals such as Fe, cu and the like, and then the metals are circulated to the air reactor to react with O 2 Reaction to regenerate Fe 2 O 3 、CuFe 2 O 4 And conveying the oxygen carrier metal compound to a fuel reactor for continuous cyclic reaction, so that the sludge ash oxygen carrier keeps good reproducibility and cyclic stability.
In the present invention, before step (5), the exhaust gas is preferably introduced into a turbine and a generator in order, and CO in the exhaust gas 2 Expanding in turbine to do work to push blades to rotate for generating CO 2 The heat energy is converted into mechanical energy, and then the mechanical energy is converted into electric energy in the generator, so that power generation is realized; then will beHigh concentration CO emitted by generator 2 Trapping, returning to fuel reactor for heating to realize CO 2 The carbon capture and packaging device is used for recycling the working medium for power generation, and finally, redundant CO is captured by the carbon capture and packaging device 2 The working medium is sealed, thereby preventing the emission of greenhouse gases.
In the present invention, the high concentration of CO 2 The volume fraction (b) of (b) is preferably not less than 95%, more preferably not less than 96%, still more preferably not less than 97%.
In the invention, the inlet temperature of the steam turbine is preferably 550-650 ℃, more preferably 560-640 ℃, and even more preferably 570-630 ℃; the inlet pressure is preferably 28 to 32MPa, more preferably 29 to 31MPa, and still more preferably 29.5 to 30.5MPa.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Introducing the residual rice into a dryer to dehydrate for 24h at 105 ℃, introducing the dehydrated residual rice into a crusher to crush to 150 meshes after finishing, then placing the treated residual rice into a hydrothermal reaction kettle, carrying out hydrothermal carbonization treatment for 2.5h under the conditions that the temperature is 220 ℃ and the pressure is 6MPa, washing the obtained sample with water to cool to 25 ℃ after finishing, then filtering with a 0.45-micron fiber filter membrane under the vacuum degree of 0.10MPa, washing the obtained filter cake for 2 times with deionized water, drying for 48h at 110 ℃, and finally grinding to 0.5mm to obtain hydrothermal carbon; combusting the sludge at 850 ℃ for 8h to obtain the product containing Fe 2 O 3 And CuFe 2 O 4 The sludge ash oxygen carrier; mixing 3kg of hydrothermal carbon and 1kg of sludge ash oxygen carrier, placing the mixture in a fuel reactor, and reacting for 1 hour at 660 ℃ to obtain metal, waste gas, treated kitchen garbage and sludge;
introducing air into an air separation device to obtain oxygen, introducing metal and oxygen into an air reactor, and reacting at 900 ℃ for 4h to obtain Fe 2 O 3 And CuFe 2 O 4 Oxygen carrier, wherein the oxygen carrier is introduced into the fuel reactor for full utilization; introducing exhaust gases into a turbine (arranged in)The mouth temperature is 600 ℃ and the pressure is 30 MPa), and CO in the waste gas is utilized 2 Expansion acting pushes the blades to rotate to convert CO 2 The heat energy is converted into mechanical energy, and then the mechanical energy is introduced into a generator to be converted into electric energy, so that power generation is realized; high concentration CO to be discharged by the generator 2 (volume fraction is 95.5%) and returning to fuel reactor for heating to realize CO 2 The carbon capture and packaging device is used for recycling the working medium for power generation, and finally, redundant CO is captured by the carbon capture and packaging device 2 And (5) sealing and storing the working medium.
The flow chart of the processing system of the present embodiment is shown in fig. 1.
Example 2
Introducing a mixture of leftovers and fruit peels into a dryer to dehydrate for 25h at 100 ℃, introducing the mixture into a crusher to crush to 200 meshes after the dehydration, then placing the treated residual rice into a hydrothermal reaction kettle, carrying out hydrothermal carbonization treatment for 3.5h under the conditions of the temperature of 200 ℃ and the pressure of 4MPa, washing the obtained sample with water to cool to 27 ℃, then filtering the sample with a 0.40-micron fiber filter membrane under the vacuum degree of 0.12MPa, washing the obtained filter cake with deionized water for 3 times, drying for 49h at 100 ℃, and finally grinding to 0.65mm to obtain hydrothermal carbon; the sludge is burnt for 7.6h at 820 ℃ to obtain the sludge containing Fe 2 O 3 And CuFe 2 O 4 The sludge ash oxygen carrier; mixing 2.8kg of hydrothermal carbon and 1kg of sludge ash oxygen carrier, placing the mixture in a fuel reactor, and reacting for 1.2 hours at 640 ℃ to obtain metal, waste gas, treated kitchen garbage and sludge;
introducing air into an air separation device to obtain oxygen, introducing metal and oxygen into an air reactor, and reacting at 870 ℃ for 3.8h to obtain Fe 2 O 3 And CuFe 2 O 4 Oxygen carrier, wherein the oxygen carrier is introduced into the fuel reactor for full utilization; introducing the waste gas into a steam turbine (setting the inlet temperature at 580 ℃ and the pressure at 31 MPa), and utilizing CO in the waste gas 2 Expansion acting pushes the blades to rotate to convert CO 2 The heat energy is converted into mechanical energy, and then the mechanical energy is introduced into a generator to be converted into electric energy, so that power generation is realized; high concentration CO subsequently discharged from the generator 2 (volume fraction 96%) trappingReturning to the fuel reactor for heating to realize CO 2 The carbon capture and packaging device is used for recycling the working medium for power generation, and finally, redundant CO is captured by the carbon capture and packaging device 2 And (5) sealing and storing the working medium.
Example 3
Introducing the residual bones into a dryer to dehydrate for 22h at 110 ℃, introducing the dehydrated residual bones into a crusher to crush to 150 meshes after the dehydration, then placing the treated residual rice into a hydrothermal reaction kettle, carrying out hydrothermal carbonization treatment for 3.1h under the conditions that the temperature is 240 ℃ and the pressure is 7.5MPa, washing the obtained sample with water to cool to 23 ℃, then filtering the sample with a 0.47 mu m fiber filter membrane under the vacuum degree of 0.08MPa, washing the obtained filter cake with deionized water for 2 times, drying for 47h at 115 ℃, and finally grinding to 0.55mm to obtain hydrothermal carbon; the sludge is burnt for 7.8h at 870 ℃ to obtain the sludge containing Fe 2 O 3 And CuFe 2 O 4 The sludge ash oxygen carrier; mixing 3.2kg of hydrothermal carbon and 1kg of sludge ash oxygen carrier, placing the mixture in a fuel reactor, and reacting at 710 ℃ for 1.2h to obtain metal, waste gas, treated kitchen garbage and sludge;
introducing air into an air separation device to obtain oxygen, introducing metal and oxygen into an air reactor, and reacting at 920 ℃ for 4.2h to obtain Fe 2 O 3 And CuFe 2 O 4 Oxygen carrier, which is introduced into the fuel reactor for full utilization; introducing the waste gas into a steam turbine (with the inlet temperature of 630 ℃ and the pressure of 29 MPa), and utilizing CO in the waste gas 2 Expansion acting pushes the blades to rotate to convert CO 2 The heat energy is converted into mechanical energy, and then the mechanical energy is introduced into a generator to be converted into electric energy, so that power generation is realized; high concentration CO subsequently discharged from the generator 2 (volume fraction is 97%) and returned to the fuel reactor for heating to realize CO 2 The carbon is used as a working medium for power generation for cyclic utilization, and finally, the redundant CO is collected and packaged by a carbon collecting and packaging device 2 And (5) sealing and storing the working medium.
From the above embodiments, the present invention provides a kitchen waste and sludge treatment system and an operation method thereof. The system comprises a dryer, a crusher, a hydrothermal reaction kettle, a fuel reactor, an air reactor and steamTurbines, generators, and carbon encapsulated storage devices. Firstly, the kitchen waste is put into a drying machine for dehydration, and then is crushed in a crusher, so that the kitchen waste can be fully reacted, the utilization rate of the kitchen waste can be maximized, and the sediments can be reduced. And then quickly digesting the insoluble substances by using a hydrothermal reaction kettle to obtain a hydrothermal carbon product. On the other hand, for the preparation of the oxygen carrier, the sludge ash oxygen carrier is obtained by high-temperature incineration of sludge and is put into a fuel reactor. The hydrothermal carbon reacts with the sludge oxygen carrier, the oxygen carrier is reduced into metal, and the metal returns to the air reactor. Meanwhile, air enters an air separator device to be stripped to obtain high-concentration oxygen, the high-concentration oxygen enters an air reactor, and a violent oxidation reaction is carried out to generate an oxygen carrier. Thus, a chemical chain oxygen decoupling reaction cycle is formed between the air reactor and the fuel reactor. Finally, high temperature flue gas (CO) generated in the fuel reactor 2 ) The flue gas enters a steam turbine, the high-temperature expansion of the flue gas pushes blades to rotate, a generator is driven to generate power, and the high-concentration CO obtained by capture is utilized 2 Introducing into a fuel reactor to absorb reaction heat and remove high concentration CO 2 The working medium is circularly used as the working medium for generating power of the system, and then the working medium is sealed and stored by utilizing a carbon packaging and storing device, so that a large amount of CO is avoided 2 And the carbon dioxide is discharged into the atmosphere and actively responds to national carbon peak reaching and carbon neutralization policies.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A kitchen waste and sludge treatment system is characterized by comprising the following devices: hydrothermal reaction kettle, fuel reactor, air reactor, steam turbine, generator, carbon trapping device, carbon encapsulation storage device.
2. A method of operating a processing system as recited in claim 1, comprising the steps of:
(1) Carrying out hydrothermal carbonization treatment on the kitchen garbage in a hydrothermal reaction kettle to obtain hydrothermal carbon;
(2) Combusting sludge to obtain a sludge ash oxygen carrier;
(3) Mixing hydrothermal carbon and a sludge ash oxygen carrier, and then reacting in a fuel reactor to obtain metal, waste gas, and treated kitchen garbage and sludge;
(4) Introducing metal and oxygen into an air reactor for reaction, and returning the obtained oxygen carrier to the fuel reactor for recycling;
(5) And the waste gas passes through the carbon trapping device and the carbon packaging and storing device in sequence to realize the sealing of the carbon dioxide.
3. The operating method according to claim 2, wherein the temperature of the hydrothermal carbonization treatment in the step (1) is 180 to 250 ℃, and the time of the hydrothermal carbonization treatment is 1.5 to 4 hours.
4. The method of claim 3, wherein the hydrothermal carbonization in step (1) is performed at a pressure of 2 to 10MPa.
5. The operating method according to claim 4, wherein the combustion temperature in step (2) is 800-900 ℃ and the combustion time is 7-9 h.
6. The operating method of claim 5, wherein the sludge ash oxygen carrier of step (2) comprises Fe 2 O 3 And CuFe 2 O 4 。
7. The operating method according to any one of claims 2 to 6, wherein the mass ratio of the hydrothermal carbon to the sludge ash oxygen carrier in the step (3) is 2.5-3.5: 1.
8. the operating method according to claim 7, wherein the reaction in step (3) is carried out at a temperature of 630 to 730 ℃ for a time of 0.5 to 1.5 hours.
9. The operating method according to claim 8, wherein the reaction in step (4) is carried out at a temperature of 850 to 950 ℃ for 3 to 5 hours.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398386A (en) * | 2013-07-08 | 2013-11-20 | 东南大学 | Device and method for disposing sludge based on chemical looping combustion |
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