Automatic sulfur dioxide control device for dry quenching desulfurization

Abstract

The utility model discloses an automatic sulfur dioxide control device for dry quenching desulfurization. The automatic sulfur dioxide control device comprises a flue gas main pipeline, a flue gas control main valve and a desulfurization device, the flue gas main pipeline is connected to the desulfurization device on each branch pipeline through a flue gas control main valve; the branch pipeline is sequentially provided with a flue gas heating device and a sulfur dioxide automatic detection device which are positioned behind the desulfurization device; and a desulfurizing agent adding self-adjusting valve is arranged on the desulfurizing device. According to the utility model, online detection and automatic adjustment of sulfur dioxide contained in the dry quenching flue gas are realized, and the sulfur dioxide contained in the dry quenching flue gas is ensured to be within an index requirement range.

Description

Technical Field

[0001] The utility model belongs to the technical field of coking flue gas desulfurization, and particularly relates to an automatic control device for sulfur dioxide in dry coke quenching desulfurization. Background Art

[0002] In the process of dry coke quenching for treating coke, since sulfides remaining in the coke will undergo an oxidation reaction to generate sulfur dioxide during the coke cooling process, the sulfur dioxide in the flue gas exceeds the national environmental protection standards, polluting the environment and seriously threatening environmental protection and production work. The original sulfur dioxide control process is non-automatic. Only after the sulfur dioxide index in the flue gas is shown to be high at the chimney terminal, manual regulation is carried out, resulting in slow process feedback regulation and a risk of sulfur dioxide exceeding the standard in the flue gas. Summary of the Invention

[0003] Object of the Invention: In order to overcome the deficiencies in the prior art, the utility model provides an automatic control device for sulfur dioxide in dry coke quenching desulfurization, which realizes on-line detection and automatic adjustment of sulfur dioxide in dry coke quenching flue gas, and ensures that the sulfur dioxide content in the dry coke quenching flue gas is controlled within the required index range.

[0004] Technical Solution: To achieve the above object, an automatic control device for sulfur dioxide in dry coke quenching desulfurization of the utility model includes a main flue gas pipeline, a main flue gas control valve, and a desulfurization device; the main flue gas pipeline is connected to the desulfurization devices on each branch pipeline through the main flue gas control valve; the branch pipeline is sequentially provided with a flue gas heating device and a sulfur dioxide automatic detection device behind the desulfurization device; a desulfurizing agent addition self-adjusting valve is arranged on the desulfurization device.

[0005] Further, each of the desulfurization devices is connected in parallel.

[0006] Further, it includes a self-adjusting valve for the flue gas branch pipeline, and the self-adjusting valve for the flue gas branch pipeline, the desulfurization device, the flue gas heating device, and the sulfur dioxide automatic detection device are sequentially arranged on the corresponding branch pipeline.

[0007] Further, a desulfurizing agent discharge valve is also arranged on the desulfurization device, the desulfurizing agent addition self-adjusting valve is located at the top of the desulfurization device, and the desulfurizing agent discharge valve is located at the bottom of the desulfurization device.

[0008] Further, it includes a flue gas cooling device, which is used to cool down the coke quenching flue gas detected by the sulfur dioxide automatic detection device.

[0009] Further, the flue gas cooling device is arranged at the output end of the main flue gas pipeline, or each flue gas cooling device is respectively arranged at the output end of each branch pipeline.

[0010] Further, it includes an industrial control system. The sulfur agent addition self-adjusting valve and the flue gas branch pipeline self-adjusting valve are controlled by the industrial control system, and the signal of the sulfur dioxide automatic detection device is transmitted and connected to the industrial control system.

[0011] Beneficial effects: The desulfurization device of the present utility model desulfurizes the coke dry quenching flue gas, and then is detected by the sulfur dioxide automatic detection device. If it is found that the sulfur dioxide content exceeds the standard, the addition amount of the desulfurization agent is controlled by the sulfur agent addition self-adjusting valve, so as to replace manual adjustment of desulfurization, realize on-line detection and automatic adjustment of sulfur dioxide in the coke dry quenching flue gas, ensure that the sulfur dioxide contained in the coke dry quenching flue gas is controlled within the standard requirements, and avoid environmental pollution and production operations. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the overall structure of the present utility model. Specific Embodiments

[0013] The present utility model will be further described below with reference to the drawings.

[0014] As Figure 1 shown, a sulfur dioxide automatic control device for coke dry quenching desulfurization includes a main flue gas pipeline 1, a main flue gas control valve 2 and a desulfurization device 3; the main flue gas pipeline 1 is connected to the desulfurization device 3 on each branch pipeline through the main flue gas control valve 2; the branch pipeline is sequentially provided with a flue gas heating device 4 and a sulfur dioxide automatic detection device 5 behind the desulfurization device 3; a sulfur agent addition self-adjusting valve 6 is arranged on the desulfurization device 3. The desulfurization device 3 desulfurizes the coke dry quenching flue gas, and then is detected by the sulfur dioxide automatic detection device 5. If it is found that the sulfur dioxide content exceeds the standard, the addition amount of the desulfurization agent is controlled by the sulfur agent addition self-adjusting valve 6, so as to replace manual adjustment of desulfurization, realize on-line detection and automatic adjustment of sulfur dioxide in the coke dry quenching flue gas, ensure that the sulfur dioxide contained in the coke dry quenching flue gas is controlled within the standard requirements, and avoid environmental pollution and production operations. The flue gas temperature is easy to produce condensed water in the pipeline, which will affect the detection accuracy of sulfur dioxide. Before detection, the flue gas is appropriately heated by the flue gas heating device 4, which can avoid the generation of condensed water, improve the detection accuracy of sulfur dioxide, and then ensure the control accuracy of the addition amount of the desulfurization agent, making the sulfur dioxide automatic control more accurate.

[0015] In the present utility model, the desulfurization device 3 can be selected as a desulfurization tower, the flue gas heating device 4 can be selected as a flue gas heater, and the sulfur dioxide automatic detection device 5 can be selected as a sulfur dioxide detector.

[0016] To improve the desulfurization efficiency, the connection mode of the desulfurization device 3 generally adopts: each of the desulfurization devices 3 is connected in parallel. After shunting, not only the desulfurization efficiency is improved, but also the detection and regulation of sulfur dioxide are more convenient and accurate.

[0017] The utility model includes a self-adjusting valve 7 for the flue gas branch pipeline. The self-adjusting valve 7 for the flue gas branch pipeline, the desulfurization device 3, the flue gas heating device 4 and the sulfur dioxide automatic detection device 5 are sequentially arranged on the corresponding branch pipelines. Through the self-adjusting valve 7 for the flue gas branch pipeline, the coke quenching flue gas in each branch pipeline can be accurately controlled, improving the operation convenience. At the same time, in order to prevent the coke quenching flue gas in each branch pipeline from flowing back, a check valve can be installed at the output end of each branch pipeline.

[0018] A desulfurizing agent discharge valve 8 is also arranged on the desulfurization device 3. The self-adjusting valve 6 for desulfurizing agent addition is located at the top of the desulfurization device 3, and the desulfurizing agent discharge valve 8 is located at the bottom of the desulfurization device 3. The utility model includes an industrial control system 10. The self-adjusting valve 6 for desulfurizing agent addition and the self-adjusting valve 7 for the flue gas branch pipeline are controlled by the industrial control system 10. The sulfur dioxide automatic detection device 5 is connected to the industrial control system 10 for signal transmission, and the addition amount of the desulfurizing agent is adjusted by using the data fed back by the industrial control system to control the addition amount of the desulfurization agent.

[0019] To avoid the impact of high-temperature flue gas discharge on the environment, the utility model includes a flue gas cooling device 9. The flue gas cooling device 9 is used to cool down the coke quenching flue gas detected by the sulfur dioxide automatic detection device 5. The flue gas cooling device 9 can be a flue gas cooler.

[0020] As Figure 1 shown, the flue gas cooling device 9 is arranged at the output end of the main flue gas pipeline 1 to cool down the output total flue gas, saving costs. In addition, a flue gas cooling device 9 can also be arranged on each branch pipeline, that is: or each of the flue gas cooling devices 9 is respectively arranged at the output end of each branch pipeline to cool down the output flue gas of each branch respectively, improving the efficiency.

[0021] Another advantage of the utility model is that by automatically detecting the content of sulfur dioxide in the flue gas and automatically adjusting the size of the self-adjusting valve 6 for desulfurizing agent addition, the sulfur dioxide in the flue gas can be effectively controlled within the specified range, and the dosing amount can be automatically adjusted according to the sulfur dioxide content in the flue gas, avoiding waste of the desulfurization agent and reducing the desulfurization cost.

[0022] The above are only the preferred embodiments of the utility model. It should be pointed out that: for those of ordinary skill in the art in this technical field, without departing from the principle of the utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. An automatic control device for sulfur dioxide in dry quenching coke desulfurization, characterized in that: It includes a main flue gas pipeline (1), a main flue gas control valve (2), and a desulfurization device (3); the main flue gas pipeline (1) is connected to the desulfurization devices (3) on each branch pipeline through the main flue gas control valve (2); the branch pipelines are sequentially provided with a flue gas heating device (4) and a sulfur dioxide automatic detection device (5) behind the desulfurization device (3); a desulfurizer addition self-adjusting valve (6) is arranged on the desulfurization device (3).

2. The automatic control device for sulfur dioxide in dry quenching coke desulfurization according to claim 1, characterized in that: Each of the desulfurization devices (3) is connected in parallel with each other.

3. The automatic control device for sulfur dioxide in dry quenching coke desulfurization according to claim 1, characterized in that: It includes a self-adjusting valve (7) for the flue gas branch pipeline, and the self-adjusting valve (7) for the flue gas branch pipeline, the desulfurization device (3), the flue gas heating device (4), and the sulfur dioxide automatic detection device (5) are sequentially arranged on the corresponding branch pipeline.

4. The automatic control device for sulfur dioxide in dry quenching coke desulfurization according to claim 1, characterized in that: A desulfurizer discharge valve (8) is further arranged on the desulfurization device (3), the desulfurizer addition self-adjusting valve (6) is located at the top of the desulfurization device (3), and the desulfurizer discharge valve (8) is located at the bottom of the desulfurization device (3).

5. The automatic control device for sulfur dioxide in dry quenching coke desulfurization according to claim 4, characterized in that: It includes a flue gas cooling device (9), and the flue gas cooling device (9) is used for cooling the coke quenching flue gas detected by the sulfur dioxide automatic detection device (5).

6. The automatic control device for sulfur dioxide in dry quenching coke desulfurization according to claim 5, characterized in that: The flue gas cooling device (9) is arranged at the output end of the main flue gas pipeline (1), or each of the flue gas cooling devices (9) is respectively arranged at the output end of each branch pipeline.

7. The automatic control device for sulfur dioxide in dry quenching coke desulfurization according to claim 5, characterized in that: It includes an industrial control system (10), the desulfurizer addition self-adjusting valve (6) and the self-adjusting valve (7) for the flue gas branch pipeline are controlled by the industrial control system (10), and the sulfur dioxide automatic detection device (5) is signal-transmission connected to the industrial control system (10).

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