Device for treating chemical product desulfurization tail gas by using dry quenching furnace

Abstract

The utility model provides a device for treating chemical desulfurization tail gas by using a dry quenching furnace, a bath tower discharges the desulfurization tail gas through a diffusion pipeline, the dry quenching furnace is provided with a tip cone section, the device comprises a Roots blower, a gas inlet pipeline and a tail gas pipeline, an inlet of the Roots blower is communicated with the diffusion pipeline through the gas inlet pipeline, and an outlet of the Roots blower is communicated with the tail gas pipeline through the tail gas pipeline. And an outlet of the Roots blower is communicated with the tip cone section of the dry quenching furnace through the tail gas pipeline. According to the device, the characteristic that air needs to be led in during operation of the dry quenching furnace and the high-temperature environment in the dry quenching furnace are fully utilized, the desulfurized tail gas is directly led into the dry quenching furnace for combustion, the dry quenching furnace is reasonably utilized, the resource utilization rate is high, the equipment failure risk and the operation management difficulty are low, and the cost is reduced. According to the device, the desulfurized tail gas is directly guided into the dry quenching furnace for incineration treatment, finally, circulating flue gas of the dry quenching furnace is merged and sent to a coke oven flue gas desulfurization system, and the technological process is simple.

Description

Technical Field

[0001] This utility model relates to the field of dry quenching technology, and in particular to a device for treating desulfurization tail gas from chemical products using a dry quenching furnace. Background Technology

[0002] The desulfurization section of the coal gas production area in a coking plant generates a large amount (approximately 7400 Nm3 / h) of desulfurization tail gas, which mainly consists of gases such as hydrogen sulfide, sulfur dioxide, organic sulfur, air, and nitrogen. The desulfurization tail gas is usually treated by combustion followed by emission.

[0003] This process has several drawbacks: First, combustion treatment requires the construction of new incinerators, which occupies land resources and increases production costs. Second, the cost of treating the exhaust gas is high; combustion consumes coal gas, and the sulfur dioxide in the exhaust gas requires further desulfurization treatment. The sulfur-containing byproducts of desulfurization are hazardous solid wastes, making their subsequent treatment difficult. Third, the desulfurization exhaust gas has already undergone water washing, acid washing, and alkali washing processes, containing only small amounts of sulfur compounds; its main components are air and nitrogen. Therefore, constructing an incinerator to treat desulfurization exhaust gas yields extremely low benefits and has a poor return on investment. Utility Model Content

[0004] The purpose of this invention is to provide a device for treating desulfurization tail gas of chemical products using a dry quenching furnace. This device uses a dry quenching furnace to combust the desulfurization tail gas of chemical products, which has high resource utilization, reduces costs, and has a simple process flow.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An apparatus for treating desulfurization tail gas from chemical products using a dry quenching furnace, wherein a water washing tower discharges the desulfurization tail gas through a venting pipe, the dry quenching furnace has a top cone section, and the apparatus includes a Roots blower, an inlet pipe, and a tail gas pipe, wherein the inlet of the Roots blower is connected to the venting pipe through the inlet pipe, and the outlet of the Roots blower is connected to the top cone section of the dry quenching furnace through the tail gas pipe.

[0007] Furthermore, in the above-mentioned device for treating desulfurization tail gas from chemical products using a dry quenching furnace, a venting valve is installed on the venting pipe, and the connection between the gas inlet pipe and the venting pipe is located upstream of the venting valve.

[0008] Furthermore, in the aforementioned device for treating desulfurization tail gas from chemical products using a dry quenching furnace, a first electric valve is installed on the gas inlet pipe, and the first electric valve is interlocked with both the Roots blower and the dry quenching coke circulating blower.

[0009] Furthermore, in the above-mentioned device for treating desulfurization tail gas from chemical products using a dry quenching furnace, multiple Roots blowers are provided. The inlet of each Roots blower is connected to the gas inlet pipe through an inlet branch pipe, and the outlet of each Roots blower is connected to the tail gas pipe through an outlet branch pipe.

[0010] Furthermore, in the above-mentioned device for treating desulfurization tail gas of chemical products using a dry quenching furnace, a second electric valve is installed on the outlet branch pipe, the dry quenching furnace has a dry quenching coke circulating fan, and the second electric valve is interlocked with both the Roots blower and the dry quenching coke circulating fan.

[0011] Furthermore, in the aforementioned device for treating desulfurization tail gas from chemical products using a dry quenching furnace, a flow meter is installed on the tail gas pipeline.

[0012] Furthermore, in the aforementioned device for treating desulfurization tail gas from chemical products using a dry quenching furnace, a pressure gauge is installed on the tail gas pipeline.

[0013] Furthermore, in the aforementioned device for treating desulfurization tail gas from chemical products using a dry quenching furnace, a tail gas sampling port is provided on the tail gas pipeline.

[0014] Furthermore, in the aforementioned apparatus for treating desulfurization tail gas from chemical products using a dry quenching furnace, the tail gas pipeline is connected to the observation port of the dry quenching furnace.

[0015] Furthermore, in the above-mentioned device for treating desulfurization tail gas from chemical products using a dry quenching furnace, the top cone section of the dry quenching furnace has multiple observation holes, and the tail gas pipeline is connected to multiple observation holes through multiple branch pipes. The axis of the branch pipe intersects the axis of the observation hole, and an acute angle is formed between the axis of the branch pipe above the intersection point and the axis of the observation hole.

[0016] Analysis shows that this utility model discloses a device for treating desulfurization tail gas from chemical products using a dry quenching furnace. This device fully utilizes the characteristic of dry quenching furnace operation requiring air introduction and the high-temperature environment inside the furnace, directly introducing the desulfurization tail gas into the furnace for combustion. It eliminates the need for separate incinerators, secondary desulfurization facilities, and by-product treatment equipment, thus making rational use of the dry quenching furnace, achieving high resource utilization, lower equipment failure risk and operation management difficulty, and reducing costs. The device directly introduces the desulfurization tail gas into the dry quenching furnace for incineration, and finally integrates it into the circulating flue gas of the dry quenching furnace, sending it to the coke oven flue gas desulfurization system. The process flow is simple. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the connection between the branch pipe and the observation hole of the dry quenching furnace according to an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached diagram: 1. Water washing tower; 2. Venting pipe; 3. Top cone section; 4. Pre-storage section; 5. Cooling section; 6. Roots blower; 7. Inlet pipe; 8. Tail gas pipe; 9. Venting valve; 10. First electric valve; 11. Inlet branch pipe; 12. Outlet branch pipe; 13. Second electric valve; 14. Flow meter; 15. Pressure gauge; 16. Tail gas sampling port; 17. Observation hole; 18. Flue gas return pipe; 19. Air inlet pipe; 20. Branch pipe. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0022] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0023] The accompanying drawings illustrate one or more examples of the present invention. The detailed description uses numerals and letters to refer to features in the drawings. Similar or analogous reference numerals in the drawings and description have been used to refer to similar or analogous parts of the present invention. As used herein, the terms “first,” “second,” and “third,” etc., are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of individual components.

[0024] like Figures 1 to 2 As shown, according to an embodiment of this utility model, a device for treating desulfurization tail gas from chemical products using a dry quenching furnace is provided. The water washing tower 1 discharges the desulfurization tail gas through a vent pipe 2. The dry quenching furnace has a top cone section 3, a pre-storage section 4, and a cooling section 5. Figure 1 As shown, the device includes a Roots blower 6, an inlet pipe 7, and an exhaust pipe 8. The inlet of the Roots blower 6 is connected to the vent pipe 2 through the inlet pipe 7, and the outlet of the Roots blower 6 is connected to the top cone section 3 of the dry quenching furnace through the exhaust pipe 8.

[0025] The process principle of this device is as follows: Roots blower 6 guides all the desulfurization tail gas discharged from the water washing tower 1 into the annular gas duct of the dry quenching furnace for combustion. This is because the dry quenching operation requires the introduction of air into the dry quenching furnace to burn the combustible components in the flue gas. The main components of the desulfurization tail gas are inert gases, containing 19.6–21.0% O2 and 100–200 mg / Nm³ of oxygen. 3 H2S, 30-50 mg / Nm 3 The NH3 content fully meets the requirements for use in dry quenching furnaces. Simultaneously, the flue gas temperature in the dry quenching furnace reaches up to 900℃, meeting the combustion conditions for combustible components in the desulfurization tail gas. Furthermore, the dry quenching furnace can introduce air to ensure sufficient air within the furnace, guaranteeing complete combustion of the desulfurization tail gas and achieving the desired combustion treatment process.

[0026] Compared to traditional desulfurization tail gas combustion treatment processes, this device utilizes the high temperature of 900℃ inside the dry quenching furnace to more thoroughly oxidize and decompose harmful components such as H2S and NH3 in the desulfurization tail gas, greatly reducing the production of sulfur-containing by-products. The generated sulfur dioxide can be incorporated into the circulating flue gas of the dry quenching furnace and sent to the coke oven desulfurization system. This not only improves the purification rate of desulfurization tail gas and reduces the concentration of harmful gases, but also reduces the generation of hazardous by-products, greatly improving environmental benefits.

[0027] This device makes full use of existing dry quenching furnaces and coke oven desulfurization systems, eliminating the need for large-scale new project investment and significantly reducing the capital investment in tail gas treatment. During operation, it does not require the additional consumption of large amounts of coal gas, nor does it require the construction of secondary desulfurization and by-product treatment devices, saving a significant amount of equipment procurement, installation, and maintenance costs and improving economic efficiency.

[0028] Furthermore, a venting valve 9 is installed on the venting pipe 2, and the connection between the air inlet pipe 7 and the venting pipe 2 is located upstream of the venting valve 9.

[0029] Furthermore, a first electric valve 10 is installed on the air inlet pipe 7, and the dry quenching furnace has a dry quenching coke circulating fan. The first electric valve 10 is interlocked with both the Roots blower 6 and the dry quenching coke circulating fan.

[0030] Furthermore, multiple Roots blowers 6 are provided. The inlet of each Roots blower 6 is connected to the air inlet pipe 7 through an inlet branch pipe 11, and the outlet of each Roots blower 6 is connected to the exhaust pipe 8 through an outlet branch pipe 12.

[0031] Furthermore, a second electric valve 13 is installed on the outlet branch pipe 12, and the second electric valve 13 is interlocked with the Roots blower 6 and the dry quenching circulating blower.

[0032] Furthermore, a flow meter 14 is installed on the exhaust gas pipe 8 to monitor the flow rate of the desulfurization exhaust gas from the chemical production process within the exhaust gas pipe 8. A pressure gauge 15 is installed on the exhaust gas pipe 8 to monitor the pressure within the exhaust gas pipe 8.

[0033] Furthermore, a tail gas sampling port 16 is provided on the tail gas pipeline 8, through which the desulfurization tail gas of the chemical products in the tail gas pipeline 8 can be sampled.

[0034] Furthermore, such as Figure 2 As shown, the exhaust gas pipe 8 is connected to the observation hole 17 of the dry quenching furnace. The top cone section 3 of the dry quenching furnace has multiple flue gas return pipes 18, multiple air inlet pipes 19, and multiple observation holes 17. The return flue gas enters the dry quenching furnace through the flue gas return pipes 18, and the air enters the dry quenching furnace through the air inlet pipes 19. The exhaust gas pipe 8 is connected to multiple observation holes 17 through multiple branch pipes 20. The axis of the branch pipe 20 intersects the axis of the pipe at the connection point of the observation hole 17. An acute angle is formed between the axis of the branch pipe 20 above the intersection point and the axis of the pipe at the connection point of the observation hole 17, so that the pipe at the connection point of the branch pipe 20 and the observation hole 17 is "Y" shaped, which does not affect the normal use of the observation hole 17.

[0035] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0036] A device for treating desulfurization tail gas from chemical products using a dry quenching furnace is disclosed. This device fully utilizes the characteristic of dry quenching furnace operation requiring air introduction and the high-temperature environment inside the furnace, directly introducing the desulfurization tail gas into the furnace for combustion. It eliminates the need for separate incinerators, secondary desulfurization facilities, and by-product treatment equipment. This method rationally utilizes the dry quenching furnace, resulting in high resource utilization, lower equipment failure risk and operation and management difficulty, reduced costs, and improved environmental benefits. The device directly introduces the desulfurization tail gas into the dry quenching furnace for incineration, and finally, the circulating flue gas from the dry quenching furnace is sent to the coke oven desulfurization system, simplifying the process flow.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An apparatus for treating desulfurization tail gas from chemical products using a dry quenching furnace, wherein a water washing tower discharges the desulfurization tail gas through a venting pipe, and the dry quenching furnace has a top cone section, characterized in that, The device includes a Roots blower, an inlet duct, and an exhaust duct, wherein... The inlet of the Roots blower is connected to the vent pipe via the air inlet pipe. The outlet of the Roots blower is connected to the top cone section of the dry quenching furnace through the exhaust gas pipe.

2. The apparatus for treating desulfurization tail gas from chemical products using a dry quenching furnace according to claim 1, characterized in that, A vent valve is installed on the vent pipe. The connection between the air inlet pipe and the vent pipe is located upstream of the vent valve.

3. The apparatus for treating desulfurization tail gas from chemical products using a dry quenching furnace according to claim 1, characterized in that, A first electric valve is installed on the air inlet pipe. The first electric valve is interlocked with both the Roots blower and the dry quenching circulating blower.

4. The apparatus for treating desulfurization tail gas from chemical products using a dry quenching furnace according to claim 1, characterized in that, Multiple Roots blowers are installed, and the inlet of each Roots blower is connected to the air inlet pipe via an inlet branch pipe. The outlet of each Roots blower is connected to the exhaust gas pipeline via an outlet branch pipe.

5. The apparatus for treating desulfurization tail gas from chemical products using a dry quenching furnace according to claim 4, characterized in that, A second electric valve is installed on the outlet branch pipe. The dry quenching furnace has a dry quenching coke circulating fan, and the second electric valve is interlocked with both the Roots blower and the dry quenching coke circulating fan.

6. The apparatus for treating desulfurization tail gas from chemical products using a dry quenching furnace according to claim 1, characterized in that, A flow meter is installed on the exhaust pipe.

7. The apparatus for treating desulfurization tail gas from chemical products using a dry quenching furnace according to claim 1, characterized in that, A pressure gauge is installed on the exhaust pipe.

8. The apparatus for treating desulfurization tail gas from chemical products using a dry quenching furnace according to claim 1, characterized in that, The exhaust gas pipeline is equipped with an exhaust gas sampling port.

9. The apparatus for treating desulfurization tail gas from chemical products using a dry quenching furnace according to claim 1, characterized in that, The exhaust gas pipe is connected to the observation hole of the dry quenching furnace.

10. The apparatus for treating desulfurization tail gas from chemical products using a dry quenching furnace according to claim 9, characterized in that, The top cone section of the dry quenching furnace has multiple observation holes, and the exhaust gas pipe is connected to multiple observation holes via multiple branch pipes. The axis of the branch pipe intersects the axis of the observation hole, and an acute angle is formed between the axis of the branch pipe and the axis of the observation hole above the intersection point.

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