Waste gas treatment device of thermal power plant

Abstract

The utility model discloses a waste gas treatment device of a thermal power plant, which comprises a treatment tank, and a gas inlet pipe is arranged at the bottom of the treatment tank; uniformly distributed filler layers are arranged in the treatment tank, a detergent spraying assembly is arranged at the inner top of the treatment tank, and the detergent spraying assembly is arranged above the filler layers; a primary exhaust pipe is arranged at the top of the treatment tank, a heating tank is further arranged at the top of the treatment tank, the primary exhaust pipe is arranged between the primary exhaust pipe treatment tank and the heating tank for communication, a heating air inlet pipe is arranged at the top in the heating tank, and the air inlet direction of the heating air inlet pipe is vertically downward. The utility model belongs to the technical field of waste gas treatment, and particularly provides a waste gas treatment device for a thermal power plant, which is used for solving the problems of low filtering efficiency and poor purification effect in the prior art and promoting decomposition and purification of waste gas subjected to chemical treatment at high temperature.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment, in particular to a waste gas treatment device for a thermal power plant. Background Art

[0002] Thermal power generation uses fuel combustion to heat water to generate steam, converting the chemical energy of the fuel into thermal energy. The steam pressure drives the turbine to rotate, converting the thermal energy into mechanical energy. The turbine then drives the generator to rotate, converting the mechanical energy into electrical energy.

[0003] Thermal power plants generate a large amount of waste gas when generating electricity. There are many harmful substances and particulate matter in these waste gases. Directly discharging them into the air will cause huge pollution and endanger people's health. Therefore, the waste gas generated by existing thermal power plants is mostly filtered through a filter device before being discharged, and then treated with chemicals. However, this method has low filtering efficiency during the treatment process, and the purification effect is not good enough, and there is no secondary treatment operation. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a waste gas treatment device for a thermal power plant, which is used to solve the problems of low filtration efficiency and poor purification effect in the prior art, and high temperature is used to promote decomposition and purification of the waste gas after chemical treatment.

[0005] The technical solutions adopted in this application are as follows:

[0006] This solution provides an exhaust gas treatment device for a thermal power plant, comprising a treatment tank, wherein an air inlet pipe is provided at the bottom of the treatment tank;

[0007] A uniformly distributed packing layer is provided in the treatment tank, and a detergent spraying assembly is provided on the inner top of the treatment tank, and the detergent spraying assembly is arranged above the packing layer; the exhaust gas enters the treatment tank through the air inlet pipe at the bottom, and the detergent flows downward through the packing layer and is fully mixed with the exhaust gas. The countercurrent washing method allows harmful substances in the exhaust gas to be absorbed by the washing liquid.

[0008] A heating tank is also arranged on the top of the treatment tank, a primary exhaust pipe is arranged between the treatment tank and the heating tank, a heating air intake pipe is arranged on the top of the heating tank, and the air intake direction of the heating air intake pipe is arranged vertically downward.

[0009] As a further elaboration, the top of the primary exhaust pipe extends upward and is disposed in the heating tank, and a heating device is disposed outside the primary exhaust pipe, wherein the heating device includes but is not limited to a ring tube heater.

[0010] As a preferred solution, an activated carbon filter layer is further provided in the primary exhaust pipe, and the activated carbon filter layer is arranged above the detergent spraying assembly.

[0011] In a further solution, the intake direction of the heating intake pipe is opposite to the exhaust direction of the primary exhaust pipe, and the reverse flow is used for high-temperature exhaust gas heat exchange. At the same time, a catalyst can be set in the heating tank, and the high temperature and catalytic reaction further decompose and purify the exhaust gas.

[0012] Furthermore, the detergent spraying assembly sprays detergent through a spray pipe, and the detergent uses a desulfurizer, so that sulfur dioxide in the flue gas reacts chemically with the desulfurizer to generate harmless substances such as sulfate, thereby reducing sulfur dioxide emissions.

[0013] As a preferred solution, a clean air exhaust pipe is connected to the top of the heating tank, and a flange is provided at the bottom of the air inlet pipe, which is connected to the exhaust gas exhaust flue flange through the flange.

[0014] The beneficial effects achieved by the utility model using the above structure are as follows:

[0015] 1. Through the setting of the treatment tank, the packing layer is used in combination with the detergent spray treatment, and then filtered through the activated carbon filter layer, which is used to solve the problems of low filtering efficiency and poor purification effect in the prior art.

[0016] 2. By setting a heating tank above the treatment tank, the two adopt a split structure, which is easy to maintain, and the high temperature is used to promote the decomposition and purification of the waste gas after chemical treatment, further improving the purification effect of the waste gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of an exhaust gas treatment device for a thermal power plant provided in this solution;

[0018] Figure 2 This is a schematic diagram of the internal structure of this scheme;

[0019] Figure 3 This is a schematic diagram of the heating tank composition of the embodiment provided in this scheme.

[0020] The meanings of the numbers in the accompanying drawings are as follows:

[0021] 1. Treatment tank, 2. Heating tank, 3. Air inlet pipe, 4. Primary exhaust pipe, 5. Clean air exhaust pipe, 6. Packing layer, 7. Detergent spray assembly, 8. Heating air inlet pipe, 9. Heating device, 10. Activated carbon filter layer, 11. Flange, 12. Spray pipe, 13. Gas detector. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] Example 1

[0024] Please refer to Figure 1-3 As shown, this embodiment provides a waste gas treatment device for a thermal power plant, including a treatment tank 1, and an air inlet pipe 3 is opened at the bottom of the treatment tank 1.

[0025] When the device is used, the flange 11 provided at the bottom of the air inlet pipe 3 is flange-connected with the exhaust gas exhaust flue to realize the air intake and collection work of the exhaust gas.

[0026] refer to Figure 2 As shown, a uniformly distributed packing layer 6 is provided in the processing tank 1, and a detergent spraying assembly 7 is provided on the inner top of the processing tank 1. The detergent spraying assembly 7 is arranged above the packing layer 6. The detergent spraying assembly 7 sprays detergent through a spray pipe 12, and the detergent adopts a desulfurizer.

[0027] In a further solution, the solution also includes a heating tank 2 located above the treatment tank 1, and a clean air exhaust pipe 5 is connected to the top of the heating tank 2. A primary exhaust pipe 4 is provided between the treatment tank 1 and the heating tank 2, and a heating air intake pipe 8 is provided at the top of the heating tank 2, and the air intake direction of the heating air intake pipe 8 is vertically downward.

[0028] The top of the primary exhaust pipe 4 extends upward and is arranged in the heating tank 2, and a heating device 9 is arranged outside the primary exhaust pipe 4. An activated carbon filter layer 10 is also arranged in the primary exhaust pipe 4, and the activated carbon filter layer 10 is arranged above the detergent spraying assembly 7.

[0029] In a further solution, the air intake direction of the heated air intake pipe 8 is opposite to the exhaust direction of the primary exhaust pipe 4, and the air flows in the opposite direction to perform heat exchange of high-temperature exhaust gas. At the same time, a catalyst can be arranged in the heating tank 2, and the high temperature and catalytic reaction further decompose and purify the exhaust gas.

[0030] When the utility model is used, the exhaust gas enters the processing tank 1 through the air inlet pipe 3 at the bottom, and the detergent flows downward through the packing layer 6 and is fully mixed with the exhaust gas. The countercurrent washing method allows the harmful substances in the exhaust gas to be absorbed by the washing liquid. Among them, the detergent uses a desulfurizer, so that the sulfur dioxide in the flue gas reacts chemically with the desulfurizer to generate harmless substances such as sulfates, thereby reducing the emission of sulfur dioxide.

[0031] Example 2

[0032] refer to Figure 3The heating tank 2 shown. The length of the primary exhaust pipe 4 can be set as needed, and a heating device 9 is set outside the primary exhaust pipe 4. The heating device 9 is not limited to ring pipe heating, or a spiral heating pipe is set outside the primary exhaust pipe 4, etc., to heat the gas entering the heating tank 2, and use the heating intake pipe 8 to introduce hot gas into the heating tank 2.

[0033] In a preferred embodiment, the air intake direction of the heating intake pipe 8 is opposite to the exhaust direction of the primary exhaust pipe 4, and the air flows in opposite directions to perform heat exchange of high-temperature exhaust gas. At the same time, a catalyst can be set in the heating tank 2 (the catalyst can be set in the heating tank 2, refer to the prior art, it is not given in the figure), and the high temperature and catalytic reaction further decompose and purify the exhaust gas to improve the cleanliness of the exhaust gas.

[0034] In a further embodiment:

[0035] Combination Figure 3 As shown, a gas detector 13 may also be provided on the clean gas exhaust pipe 5 to detect the exhausted gas.

[0036] It should be noted that although the embodiments of the utility model have been shown and described, for ordinary technicians in this field, without departing from the inventive purpose of the utility model, structural methods and embodiments similar to the technical scheme without creative design should all fall within the scope of protection of the utility model.

Claims

1. An exhaust gas treatment device for a thermal power plant, comprising a treatment tank, wherein an air inlet pipe is provided at the bottom of the treatment tank, wherein: A uniformly distributed packing layer is provided in the processing tank, and a detergent spraying assembly is provided on the inner top of the processing tank, and the detergent spraying assembly is arranged above the packing layer; A heating tank is also arranged on the top of the treatment tank, a primary exhaust pipe is arranged between the treatment tank and the heating tank, a heating air intake pipe is arranged on the top of the heating tank, and the air intake direction of the heating air intake pipe is arranged vertically downward.

2. The exhaust gas treatment device of a thermal power plant according to claim 1, characterized in that: The top of the primary exhaust pipe extends upward and is arranged in the heating tank, and a heating device is arranged outside the primary exhaust pipe.

3. The exhaust gas treatment device of a thermal power plant according to claim 2, characterized in that: An activated carbon filter layer is also arranged in the primary exhaust pipe, and the activated carbon filter layer is arranged above the detergent spraying assembly.

4. The exhaust gas treatment device of a thermal power plant according to claim 2, characterized in that: The air intake direction of the heating air intake pipe is opposite to the exhaust direction of the primary exhaust pipe, and high-temperature heat exchange is performed by utilizing the reverse flow of the gas.

5. The exhaust gas treatment device of a thermal power plant according to claim 1, characterized in that: The detergent spraying assembly sprays detergent through a spray pipe, and the detergent is a desulfurizing agent.

6. The exhaust gas treatment device of a thermal power plant according to claim 1, characterized in that: The top of the heating tank is connected to a clean air discharge pipe, and the bottom of the air inlet pipe is provided with a flange plate, which is connected to the exhaust gas discharge flue flange through the flange plate.

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