Device for reducing consumption of hydrogen peroxide in desulfurization of acid-making tail gas and anode furnace tail gas

Abstract

The utility model discloses a device for reducing consumption of hydrogen peroxide for desulfurization of acid-making tail gas and anode furnace tail gas. The device comprises an acid-making tail gas desulfurization tower, an anode furnace tail gas desulfurization tower, a hydrogen peroxide medicament storage tank, a hydrogen peroxide solution tank, a dilute acid storage tank and a wet-type electric demister. Hydrogen peroxide in the hydrogen peroxide agent storage tank is pumped into the hydrogen peroxide solution tank, the concentration of sulfur dioxide is measured through the sulfur dioxide detector on the flue gas pipeline at the inlet of the desulfurizing tower, and the adding amount of the hydrogen peroxide solution is adjusted so as to achieve accurate control. According to the utility model, the automation level of the hydrogen peroxide adding amount is improved, the consumption of medicament auxiliary materials is reduced, the working intensity of operators is reduced, and the tail gas data is accurately controlled.

Description

Technical Field

[0001] This utility model belongs to the field of desulfurization of smelting flue gas, specifically relating to a device for reducing the consumption of hydrogen peroxide for desulfurization of acid production tail gas and anode furnace tail gas. Background Technology

[0002] In traditional processes, the sulfur dioxide concentration in acid production tail gas and anode furnace tail gas is controlled by adding hydrogen peroxide concentrate to the desulfurization tower. If the hydrogen peroxide concentration in the circulating liquid of the desulfurization tower can be precisely controlled, the amount of hydrogen peroxide added can be reduced. However, the existing system has a low level of automation, making it difficult to achieve precise control. Adding too much hydrogen peroxide will cause waste of auxiliary materials, and the hydrogen peroxide carried by the tail gas will also corrode the electrostatic precipitator. Adding too little hydrogen peroxide will make it difficult to control the tail gas data and increase the workload of operators. Utility Model Content

[0003] In response to the above situation, this utility model provides a device for reducing the consumption of hydrogen peroxide in acid production tail gas and anode furnace tail gas desulfurization.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An apparatus for reducing hydrogen peroxide consumption in desulfurization of acid production tail gas and anode furnace tail gas includes an acid production tail gas desulfurization tower, an anode furnace tail gas desulfurization tower, a hydrogen peroxide reagent storage tank, a hydrogen peroxide solution tank, a dilute acid storage tank, and a wet electrostatic precipitator. The hydrogen peroxide reagent storage tank is connected to the hydrogen peroxide solution tank via a pipeline. Both the acid production tail gas desulfurization tower and the anode furnace tail gas desulfurization tower are equipped with spray mechanisms inside. The hydrogen peroxide solution tank is connected to the inlet of the spray mechanism of both the acid production tail gas desulfurization tower and the anode furnace tail gas desulfurization tower via pipelines. The flue gas outlet at the top of the desulfurization tower for the tail gas of the anode furnace is connected to the first and second wet electrostatic precipitators via pipelines. The spray liquid circulation outlet at the bottom of the desulfurization tower for the tail gas of the acid production and the desulfurization tower for the tail gas of the anode furnace are respectively equipped with circulation pipelines. The circulation pipelines are branched with dilute acid discharge pipelines, which are connected to dilute acid storage tanks. The flue gas inlets of the desulfurization tower for the tail gas of the acid production and the desulfurization tower for the tail gas of the anode furnace are respectively connected to the tail gas flue of the acid production and the tail gas flue of the anode furnace. Sulfur dioxide detectors are respectively installed on the tail gas flue of the acid production and the tail gas flue of the anode furnace.

[0006] Furthermore, a circulation pipe is provided at the bottom of the hydrogen peroxide solution tank, which is connected to the return port at the top of the hydrogen peroxide solution tank. Two hydrogen peroxide solution delivery pipes are branched on the circulation pipe, and the two hydrogen peroxide solution delivery pipes are respectively connected to the inlet of the spray mechanism of the acid tail gas desulfurization tower and the anode furnace tail gas desulfurization tower.

[0007] Furthermore, an emergency main pipeline is branched off on the connecting pipeline between the hydrogen peroxide agent storage tank and the hydrogen peroxide solution tank. At the end of the emergency main pipeline are two emergency branch pipelines, which are respectively connected to the inlet of the spray mechanism of the acid tail gas desulfurization tower and the anode furnace tail gas desulfurization tower.

[0008] Furthermore, the circulation pipes at the bottom of the acid production tail gas desulfurization tower and the anode furnace tail gas desulfurization tower are connected to the liquid inlet of the corresponding spray mechanism at the top of the desulfurization tower.

[0009] Furthermore, delivery pumps are installed on the connecting pipes between the hydrogen peroxide agent storage tank and the hydrogen peroxide solution tank, on the emergency main pipe, on the circulation pipe at the bottom of the hydrogen peroxide solution tank, on the circulation pipe at the bottom of the acid production tail gas desulfurization tower, and on the circulation pipe at the bottom of the anode furnace tail gas desulfurization tower.

[0010] Furthermore, the first and second wet electrostatic precipitators are connected to the chimney via pipes.

[0011] Furthermore, the hydrogen peroxide solution tank is also equipped with an external production water pipe, and the external production water pipe is equipped with a valve.

[0012] Furthermore, the dilute acid storage tank is equipped with a dilute acid discharge pipe, and a dilute acid discharge pump is installed on the discharge pipe.

[0013] Furthermore, valves are installed on the circulation pipe at the bottom of the hydrogen peroxide solution tank, the hydrogen peroxide solution delivery pipe, and the emergency branch pipe.

[0014] This utility model has the following beneficial effects:

[0015] 1. Install a sulfur dioxide detector 1-2 in the flue 1-1 of the desulfurization tower for the acid production tail gas to measure the sulfur dioxide concentration at the inlet of the desulfurization tower in real time, and then determine the sulfur dioxide flow rate of the acid production tail gas online according to the emission rate of the acid production tail gas.

[0016] 2. Install a sulfur dioxide detector 2-2 in the flue 2-1 of the anode furnace tail gas into the desulfurization tower to measure the sulfur dioxide concentration at the inlet of the anode furnace tail gas desulfurization tower in real time, and then determine the sulfur dioxide flow rate of the anode furnace online according to the emission rate of the anode furnace tail gas.

[0017] 3. Add hydrogen peroxide solution tank 3-3 and hydrogen peroxide solution circulation pump 3-4 after hydrogen peroxide solution storage tank 3-1. Install electric valve 3-5 for hydrogen peroxide solution to acid tail gas desulfurization tower and electric valve 2 (3-6) for hydrogen peroxide solution to anode furnace desulfurization tower on the pump outlet pipe. Install reflux valve 3-7 to enter hydrogen peroxide solution tank.

[0018] 4. The original system's hydrogen peroxide metering pump is set as an emergency pump 3-8, and the emergency pump outlet pipeline is equipped with a first emergency electric valve 3-9 and a second emergency electric valve 3-10.

[0019] 5. The acid desulfurization tower is connected to the first wet electrostatic precipitator 1-5 via a flue, and the anode furnace tail gas desulfurization tower is connected to the second wet electrostatic precipitator 2-5 via a flue.

[0020] 6. The outlets of the circulating pump 1-4 of the acid production tail gas desulfurization tower and the circulating pump 2-4 of the anode furnace tail gas desulfurization tower are connected to the bypass pipeline into the dilute acid storage tank 4-1. The bottom flow outlet of the dilute acid storage tank is connected to the dilute acid discharge pump 4-2. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings.

[0024] Example 1

[0025] A device for reducing the consumption of hydrogen peroxide in acid production tail gas and anode furnace tail gas desulfurization, such as Figure 1 As shown, the system includes an acid production tail gas desulfurization tower 1-3, an anode furnace tail gas desulfurization tower 2-3, a hydrogen peroxide reagent storage tank 3-1, a hydrogen peroxide solution tank 3-3, a dilute acid storage tank 4-1, a first wet electrostatic precipitator 1-5, a second wet electrostatic precipitator 2-5, and a chimney 1-6. Both the acid production tail gas desulfurization tower 1-3 and the anode furnace tail gas desulfurization tower 2-3 are equipped with flue gas inlets, flue gas outlets, and spray liquid circulation outlets. Both towers have internal spraying mechanisms with spray liquid inlets. The flue gas inlets of the acid production tail gas desulfurization tower 1-3 and the anode furnace tail gas desulfurization tower 2-3 are connected to the acid production tail gas flue 1-1 and the anode furnace tail gas flue 2-1, respectively. The acid production tail gas flue 1-1 is equipped with a sulfur dioxide detector 1-2, and the anode furnace tail gas flue 2-1 is equipped with a sulfur dioxide detector 2-2.

[0026] The hydrogen peroxide reagent storage tank 3-1 is connected to the hydrogen peroxide connection pipe, the hydrogen peroxide pump 3-2 installed on the pipe, and the hydrogen peroxide solution tank 3-3. The bottom of the hydrogen peroxide solution tank 3-3 is equipped with a circulation pipe, and the circulation pipe is equipped with a hydrogen peroxide solution circulation pump 3-4 and an electric valve 3-7. The circulation pipe is connected to the return port at the top of the hydrogen peroxide solution tank 3-3. Two hydrogen peroxide solution delivery pipes are branched on the circulation pipe. The two hydrogen peroxide solution delivery pipes are respectively connected to the inlet of the spray mechanism of the acid tail gas desulfurization tower 1-3 and the anode furnace tail gas desulfurization tower 2-3. The two hydrogen peroxide solution delivery pipes are respectively equipped with electric valves 3-5 and 3-6.

[0027] An emergency main pipeline branches off from the hydrogen peroxide connection pipeline. An emergency hydrogen peroxide pump 3-8 is installed on the emergency main pipeline. Two emergency branch pipelines are located at the end of the emergency main pipeline. These two branch pipelines are respectively connected to the inlet of the spray mechanism of the acid tail gas desulfurization tower 1-3 and the anode furnace tail gas desulfurization tower 2-3. Emergency electric valves 3-9 and 3-10 are respectively installed on the two emergency branch pipelines.

[0028] The flue gas outlets at the top of the acid production tail gas desulfurization tower 1-3 and the anode furnace tail gas desulfurization tower 2-3 are connected to the first wet electrostatic precipitator 1-5 and the second wet electrostatic precipitator 2-5 respectively via pipelines. The first wet electrostatic precipitator 1-5 and the second wet electrostatic precipitator 2-5 are connected to the chimney 1-6 via pipelines. The spray liquid circulation outlets at the bottom of the acid production tail gas desulfurization tower 1-3 and the anode furnace tail gas desulfurization tower 2-3 are respectively equipped with circulation pipelines. These circulation pipelines are connected to the inlet of the corresponding spray mechanism at the top of the desulfurization tower. Branches of the circulation pipelines have discharge pipelines connected to the dilute acid storage tank 4-1. A circulating pump 1-4 is installed on the circulation pipeline of the acid production tail gas desulfurization tower 1-3. A circulating pump 2-4 is also installed on the circulation pipeline of the anode furnace tail gas desulfurization tower 2-3.

[0029] The hydrogen peroxide solution tank 3-3 is also equipped with an external production water pipe, and the external production water pipe is equipped with a production water valve 3-11.

[0030] The dilute acid storage tank 4-1 is equipped with a dilute acid discharge pipe, and the dilute acid discharge pipe is equipped with a dilute acid discharge pump 4-2.

[0031] The working process of this utility model is as follows:

[0032] 1. The exhaust gas from the acid production section enters the acid production exhaust gas desulfurization tower 1-3 through the acid production flue gas pipeline 1-1, and comes into countercurrent contact with the hydrogen peroxide solution sprayed by the acid production exhaust gas desulfurization tower circulating pump 1-4. After desulfurization, the exhaust gas enters the first wet electrostatic precipitator 1-5 for dust and mist removal, and then enters the chimney 1-6 for emission in compliance with standards.

[0033] 2. The exhaust gas from the anode furnace enters the anode furnace exhaust gas desulfurization tower 2-3 through the anode furnace exhaust gas flue 2-1, and comes into countercurrent contact with the hydrogen peroxide solution sprayed by the anode furnace exhaust gas desulfurization tower circulating pump 2-4. After desulfurization, the exhaust gas enters the second wet electrostatic precipitator 2-5 for dust and mist removal, and then enters the chimney 1-6 for emission in compliance with standards.

[0034] 3. The hydrogen peroxide in the hydrogen peroxide reagent storage tank 3-1 is pumped into the hydrogen peroxide solution tank 3-3 by the hydrogen peroxide pump 3-2, where it is mixed with external production water to form a low-concentration hydrogen peroxide solution. This solution is then sent to the acid production tail gas desulfurization tower 1-3 and the anode furnace tail gas desulfurization tower 2-3 by the hydrogen peroxide solution circulation pump 3-4, replacing the original system's water addition to the desulfurization towers. Based on the sulfur dioxide flow rate measured online by the sulfur dioxide detectors 1-2 and 2-2, the opening of the hydrogen peroxide solution electric valves 3-5 and 3-6 is automatically controlled to achieve automated control.

[0035] 4. In an emergency, turn on the hydrogen peroxide emergency pump 3-8 and send the hydrogen peroxide agent directly into the desulfurization tower through the emergency electric valves 3-9 and 3-10 to ensure the exhaust gas data.

[0036] 5. The dilute acid generated after the desulfurization tower absorbs sulfur dioxide is sent to the dilute acid storage tank 4-1 through the bypass of the desulfurization tower circulation pump outlet, and is discharged from the system by the dilute acid discharge pump 4-2.

[0037] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A device for reducing the consumption of hydrogen peroxide in acid production tail gas and anode furnace tail gas desulfurization, characterized in that, The system includes an acid production tail gas desulfurization tower, an anode furnace tail gas desulfurization tower, a hydrogen peroxide reagent storage tank, a hydrogen peroxide solution tank, a dilute acid storage tank, and a wet electrostatic precipitator. The hydrogen peroxide reagent storage tank is connected to the hydrogen peroxide solution tank via pipelines. Both the acid production tail gas desulfurization tower and the anode furnace tail gas desulfurization tower are equipped with spraying mechanisms inside. The hydrogen peroxide solution tank is connected to the inlet of the spraying mechanism of both the acid production tail gas desulfurization tower and the anode furnace tail gas desulfurization tower via pipelines. The flue gas at the top of the acid production tail gas desulfurization tower and the anode furnace tail gas desulfurization tower... The outlets are connected to the first and second wet electrostatic precipitators via pipelines. The spray liquid circulation outlets at the bottom of the acid production tail gas desulfurization tower and the anode furnace tail gas desulfurization tower are respectively equipped with circulation pipelines. The circulation pipelines are branched with dilute acid discharge pipelines, which are connected to dilute acid storage tanks. The flue gas inlets of the acid production tail gas desulfurization tower and the anode furnace tail gas desulfurization tower are respectively connected to the acid production tail gas flue and the anode furnace tail gas flue. Sulfur dioxide detectors are respectively installed on the acid production tail gas flue and the anode furnace tail gas flue.

2. The apparatus for reducing the consumption of desulfurization hydrogen peroxide in acid production tail gas and anode furnace tail gas according to claim 1, characterized in that, The bottom of the hydrogen peroxide solution tank is equipped with a circulation pipe, which is connected to the return port at the top of the hydrogen peroxide solution tank. Two hydrogen peroxide solution delivery pipes are branched on the circulation pipe, and the two hydrogen peroxide solution delivery pipes are respectively connected to the inlet of the spray mechanism of the acid tail gas desulfurization tower and the anode furnace tail gas desulfurization tower.

3. The apparatus for reducing the consumption of desulfurization hydrogen peroxide in acid production tail gas and anode furnace tail gas according to claim 2, characterized in that, An emergency main pipeline is branched off on the connecting pipeline between the hydrogen peroxide agent storage tank and the hydrogen peroxide solution tank. At the end of the emergency main pipeline are two emergency branch pipelines, which are respectively connected to the inlet of the spray mechanism of the acid tail gas desulfurization tower and the anode furnace tail gas desulfurization tower.

4. The apparatus for reducing the consumption of desulfurization hydrogen peroxide in acid production tail gas and anode furnace tail gas according to claim 1, characterized in that, The circulation pipes at the bottom of the acid production tail gas desulfurization tower and the anode furnace tail gas desulfurization tower are connected to the liquid inlet of the corresponding spray mechanism at the top of the desulfurization tower.

5. The apparatus for reducing the consumption of desulfurization hydrogen peroxide in acid production tail gas and anode furnace tail gas according to claim 4, characterized in that, Delivery pumps are installed on the connecting pipes between the hydrogen peroxide agent storage tank and the hydrogen peroxide solution tank, on the emergency main pipeline, on the circulation pipe at the bottom of the hydrogen peroxide solution tank, on the circulation pipe at the bottom of the acid production tail gas desulfurization tower, and on the circulation pipe at the bottom of the anode furnace tail gas desulfurization tower.

6. The apparatus for reducing the consumption of desulfurization hydrogen peroxide in acid production tail gas and anode furnace tail gas according to claim 1, characterized in that, The first and second wet electrostatic precipitators are connected to the chimney via pipes.

7. The apparatus for reducing the consumption of desulfurization hydrogen peroxide in acid production tail gas and anode furnace tail gas according to claim 1, characterized in that, The hydrogen peroxide solution tank is also equipped with an external production water pipeline, which is fitted with a valve.

8. The apparatus for reducing the consumption of desulfurization hydrogen peroxide in acid production tail gas and anode furnace tail gas according to claim 1, characterized in that, The dilute acid storage tank is equipped with a dilute acid discharge pipe, and a dilute acid discharge pump is installed on the discharge pipe.

9. The apparatus for reducing the consumption of desulfurization hydrogen peroxide in acid production tail gas and anode furnace tail gas according to claim 3, characterized in that, Valves are installed on the circulation pipeline of the hydrogen peroxide solution tank, the hydrogen peroxide solution delivery pipeline, and the emergency branch pipeline.

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