RU160276U1 - DEVICE FOR WASTE WATER COMBUSTION OF COCOCHEMICAL PRODUCTION - Google Patents

Abstract

1. A device for burning wastewater by-product coke production, comprising a vertical cylindrical combustion chamber with heat-resistant lining, equipped with nozzles for spraying wastewater, gas burners, a discharge duct located in the upper part of the housing, characterized in that the nozzles are arranged in tiers in the radial direction in height chamber, while the bottom wall of the chamber has through parallel slots in communication with the air distribution chamber, additionally installed under the combustion chamber I, equipped with two air inlets, and gas burners are placed in pairs under the bottom wall along the cracks. 2. The device according to claim 1, characterized in that it is equipped with starting gas burners located in the lower part of the chamber. 3. The device according to claim 1, characterized in that it is equipped with radial nozzles for spraying industrial water for cooling flue gases. 4. The device according to claim 1 or 3, characterized in that the nozzles for spraying industrial water are located in the upper part of the combustion chamber in front of the exhaust gas duct.

Description

The utility model relates to by-product coke production and can be used to burn wastewater.

BACKGROUND

Wastewater of coke production is one of the most dangerous sources of environmental pollution with toxic and hazardous substances. After implementing a complex of various purification methods, wastewater at many existing enterprises is used for various needs. However, the volume of wastewater generation significantly exceeds the need for their secondary use, therefore, excesses must be neutralized.

Thermal neutralization of industrial waste is a universal method that allows you to destroy wastewater containing toxic and dangerous substances, for example, by burning. The essence of the fire method is to spray wastewater into flue gases having a high temperature (more than 1000 ° C). In this case, water completely evaporates, organic impurities burn with the formation of harmless gas products. The main disadvantage is the high cost of the process of thermal disposal, due to the high consumption of gaseous fuels, for example, natural gas (MN Bernandiner, A.P. Shurygin, “Fire processing and disposal of industrial waste”, M., Chemistry, 1990, p. 23 -34).

In coke production, coke oven gas can be used as gaseous fuel for wastewater combustion, the excess of which is currently being destroyed by the flare method.

ANALOGUES

Known shaft furnace for fire neutralization of liquid waste, which is a vertical cylindrical shaft containing alternating rows of nozzles for spraying liquid and tangential burners, while the camera has clamps between rows of nozzles and burners (AS No. 393538, IPC F23g 7/00 F27b 1/08, C02c 5/04, publ. 12/27/1973).

The disadvantages of the device are the following: low efficiency of neutralization of liquid waste, high consumption of gaseous fuel, the location of the burners in the high temperature zone, which can lead to their premature failure and reduce the reliability of the device.

PROTOTYPE

A known furnace for burning liquid waste containing a vertical cylindrical combustion chamber, a nozzle for supplying liquid waste, a tangentially directed gas burner, a flue gas duct installed in the upper part of the chamber, the furnace further comprises a afterburner and a tangentially gas burner above the combustion chamber above a combustion chamber communicating through a bypass hole located in the lower wall of the afterburner. In this case, the afterburning chamber is equipped with a fairing installed between the bypass hole and the exhaust gas duct (utility model No. 34994, IPC F24G 7/04, published on December 20, 2003). The burners are connected to the fuel line and the air line. The flow of hot gases generated during the combustion of fuel and air, twists in the circumferential direction the liquid waste flowing out of the nozzles, which contributes to an intensive and stable combustion process. The installation of the afterburner ensures the complete neutralization of waste.

The disadvantages of the device is the high fuel consumption for burning waste. The use of forced air supply also increases the energy consumption of the device. In addition, the location of the burners in the high temperature zone can lead to their premature failure, which reduces the reliability of the device. The lack of start-up burners also reduces reliability. Starting burners not only serve to start the device, they ensure the constant presence of a torch in it, which prevents the possibility of an air-gas mixture explosion.

The objective of the utility model is to create a device that reduces economic and energy costs, increases the reliability of the neutralization of wastewater by-product coke production using coke oven gas as a gaseous fuel.

The objective of the utility model is achieved in that in a device for burning wastewater, including a vertical cylindrical combustion chamber with a heat-resistant lining, equipped with nozzles for spraying wastewater, gas burners for burning fuel, a discharge duct located in the upper part of the chamber, nozzles for spraying a waste water are arranged in tiers in a radial direction along the height of the chamber, while the lower wall of the chamber has through parallel slots in communication with the air distribution chamber Further installed under the combustion chamber, provided with two water intake pipes, and the gas burners are arranged in pairs at the bottom wall along the slits.

In addition, the device is equipped with starting gas burners located in the lower part of the chamber. Additionally, the device is equipped with radial nozzles for spraying industrial water for cooling flue gases located in the upper part of the combustion chamber in front of the exhaust gas duct.

A group of nozzles arranged in tiers allows a large volume of wastewater to be fed into the chamber, while providing finer atomization and a more uniform distribution of droplets over the combustion chamber cross section.

The location of the coke oven gas burners in pairs parallel to the slots in an amount that provides significant volumes of coke oven gas to the chamber allows creating a combustion zone sufficient for efficient evaporation of water and burning of organic impurities.

The location of the coke oven gas burners under the bottom wall lining protects them from the effects of high temperatures in the combustion chamber.

When combining the combustion chamber with the air distribution chamber in the device, the coke oven gas combustion process occurs without forced air injection. In this case, multi-jet gas supply is used in the burners. With a pairwise arrangement along parallel slots, adjacent burners form oncoming multi-jet flows of coke oven gas, which are mixed with air through the slots and are drawn into the combustion chamber. The separation of the gas stream supplied to the burner into many small jets improves the quality of mixing gas and air before ignition, which ensures the intensity and stability of the combustion process.

The device allows you to effectively neutralize significant volumes of wastewater at low economic and energy costs, while ensuring its reliable operation.

In FIG. 1 shows a general view of the device, FIG. 2 section AA. A device for burning wastewater by-product coke production includes a vertical cylindrical combustion chamber 1, lined with refractory brick 2, nozzles for spraying wastewater 3 located at the height of the chamber 1 radially in three tiers. The number of tiers depends on the amount of wastewater burned. The upper tier is formed by nozzles 4 for spraying process water for cooling flue gases. The tier of nozzles 4 is located in the combustion chamber 1 in front of the exhaust gas duct 5. The chamber 1 has on the lower lined wall through parallel slots 6 communicating with the air distribution chamber 7, additionally installed under the combustion chamber 1. The air distribution chamber 7 is equipped with two water inlets 8 located opposite each other friend, with air control valves (not shown in FIG.). Gas burners 9 are placed in pairs under the bottom wall of the chamber 1 parallel to the slots 6. At the same time, through holes made in one row on the side surface of each burner (not shown in Fig.) Are turned to each other on two adjacent burners 9 and create two oncoming flows small jets of gas. Two starting coke oven gas burners 10 are located in the lower part of the combustion chamber 1 and are located symmetrically opposite each other.

The device operates as follows.

Wastewater of the coke production is fed through spray nozzles 3 into the combustion chamber 1. Coke gas through the gas collector (not shown in Fig.) Enters the start-up burners 10 and gas burners 9. In the burners 9 located in pairs under the bottom wall, coke oven gas is mixed with through air and through slits 6 it enters combustion chamber 1. The flow of hot gases generated during the combustion of coke oven gas and air rises. Wastewater sprayed in the upstream evaporates, organic waste burns out. On the first tier, the temperature of hot gases is 1200 ° C, on the second - 1000 ° C, on the third - 800-1000 ° C. The exhaust gases before entering the exhaust duct 5 are cooled by industrial water supplied through nozzles 4 to 650 ° C.

Using the proposed utility model, simultaneous effective thermal neutralization of wastewater and coke oven gas is achieved, which prevents environmental pollution.

Claims (4)

1. A device for burning wastewater by-product coke production, comprising a vertical cylindrical combustion chamber with heat-resistant lining, equipped with nozzles for spraying wastewater, gas burners, a discharge duct located in the upper part of the housing, characterized in that the nozzles are arranged in tiers in the radial direction in height chamber, while the bottom wall of the chamber has through parallel slots in communication with the air distribution chamber, additionally installed under the combustion chamber I, equipped with two air inlets, and gas burners are placed in pairs under the bottom wall along the slots. 2. The device according to p. 1, characterized in that it is equipped with starting gas burners located in the lower part of the chamber. 3. The device according to p. 1, characterized in that it is equipped with radial nozzles for spraying industrial water for cooling flue gases. 4. The device according to claim 1 or 3, characterized in that the nozzles for spraying industrial water are located in the upper part of the combustion chamber in front of the exhaust gas duct.

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