Device for drying wet desulfurizer in tower by using own gas and solid
By using a gas heater to heat up in the desulfurization tower, the drying problem of wet desulfurization agent in coke oven gas is solved, the loading and unloading of desulfurization agents is avoided, efficient desulfurization effect and environmental protection process are achieved, and operating costs are reduced and environmental pollution.
Patent Information
- Application Number
- CN202420270500.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-02-04
AI Technical Summary
The difference in water and ambient temperature in the coke oven gas causes moisture in the inner wall of the desulfurization tower, affecting the desulfurization effect, and the replacement and treatment of desulfurization agents have economic and environmental pollution problems.
Design a drying device in the tower using its own gas solid wet desulfurization agent, heat exchange is performed through a gas heater, the temperature of the coke oven gas is increased, and the wet desulfurization agent is transported to the desulfurization tower, which solves the reduction of the desulfurization capacity of the wet material The problem of this method avoids loading, unloading and processing of desulfurization agents, and realizes direct drying operation in the tower.
It effectively solves the problem of desulfurization capacity of wet materials, reduces the losses and operating costs of wet materials replacement, ensures the achievement of desulfurization technical conditions, is environmentally friendly and pollution-free, and reduces the risk of condensation caused by medium consumption and temperature difference.
Smart Images
Figure CN222257565U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of material drying, in particular to a device for drying a solid wet desulfurizing agent in a tower using its own gas. Background Art
[0002] Coke oven gas uses iron oxide solid desulfurizer to complete the fine desulfurization of coke oven gas on an axial fixed bed, which is widely used in steel plants. However, due to the close location of the fine desulfurization tower to the coking area, the coke oven gas contains water, and the large temperature difference between the day and night environment inside and outside the desulfurization tower in winter, condensation will form on the wet tower wall, causing the desulfurizer near the inner wall of the desulfurization tower to become wet, affecting the desulfurization effect.
[0003] If you choose to remove and replace the desulfurizer, it will cause great economic losses. At the same time, the used desulfurizer is considered as hazardous waste in the industry and is difficult to handle. Utility Model Content
[0004] In order to solve the above problems, the present application provides a tower drying device for solid wet desulfurizer using its own gas.
[0005] The present application provides an in-tower drying device for a solid wet desulfurizing agent using its own gas, which is applied to a desulfurizing tower. The desulfurizing tower is used for fine desulfurization of coke oven gas. The desulfurizing tower is connected to a fine desulfurized gas transmission main at the top of the tower, and is connected to a tower inlet pipe at the bottom of the tower; the in-tower drying device for a solid wet desulfurizing agent using its own gas comprises a gas heater, which is connected to a steam inlet pipe, a steam outlet pipe, a gas inlet pipe and a gas outlet pipe. A cold channel and a hot channel for heat exchange are provided inside the body of the gas heater. The steam inlet pipe, the hot channel and the steam outlet pipe are connected in sequence, the gas inlet pipe, the cold channel and the gas outlet pipe are connected in sequence, the gas outlet pipe is connected to the tower inlet pipe, and the gas inlet pipe is used to input coke oven gas.
[0006] In some embodiments, the desulfurization tower is equipped with a gas preprocessor, which is connected to the tower inlet pipe. The gas preprocessor is provided with a processor air inlet pipe, and the coke oven gas to be treated enters the gas preprocessor through the processor air inlet pipe; the gas inlet pipe is connected to the processor air inlet pipe.
[0007] In some embodiments, a self-gas solid wet desulfurizer in-tower drying device is applied to two or more desulfurization towers, and the two or more desulfurization towers are arranged in parallel, and the coal gas outlet pipeline is connected to the respective tower inlet pipelines of all desulfurization towers.
[0008] In some embodiments, the coal gas outlet pipeline includes a main pipeline and at least two branch pipelines with the same number as the desulfurization towers, the branch pipelines are connected to the main pipeline, the main pipeline is connected to the gas heater, and a shut-off valve is installed on each branch pipeline.
[0009] In some embodiments, the steam inlet pipe is equipped with a shut-off valve and a flow regulating valve.
[0010] In some embodiments, the steam outlet pipe is equipped with a cut-off trap.
[0011] In some embodiments, the gas preprocessor is provided with a preprocessor outlet pipe, which is connected to the tower inlet pipe to realize the connection between the gas preprocessor and the tower inlet pipe; the preprocessor outlet pipe is installed with an outlet gas shut-off valve, and the tower inlet pipe is installed with an inlet gas shut-off valve.
[0012] In some embodiments, a shut-off valve is installed in the processor air inlet duct.
[0013] In some embodiments, the refined desulfurized coal gas transmission main is installed with an outlet coal gas shut-off valve.
[0014] In some embodiments, the desulfurization tower is provided with an external insulation layer outside the tower body, and the external insulation layer is arranged around the tower body of the desulfurization tower.
[0015] The beneficial effects of the present application are as follows: a tower drying device for solid wet desulfurizer using its own gas is provided, including a gas heater, the gas heater is connected to a steam inlet pipe, a steam outlet pipe, a gas inlet pipe and a gas outlet pipe, a cold channel and a hot channel for heat exchange are arranged inside the body of the gas heater, the steam inlet pipe, the hot channel and the steam outlet pipe are connected in sequence, and the gas inlet pipe, the cold channel and the gas outlet pipe are connected in sequence; the device is applied to an existing desulfurization tower, the desulfurization tower is used for fine desulfurization of coke oven gas, the tower inlet pipe of the desulfurization tower is used for inputting coke oven gas to be finely desulfurized, and part of the coke oven gas is input into the gas inlet The gas outlet pipeline is used to increase the temperature of the coke oven gas through heat exchange in the gas heater, and then it is transported to the desulfurization tower along the gas outlet pipeline and the tower inlet pipeline, and the wet desulfurizer in the desulfurization tower is dried in the tower, which not only solves the problem of decreased desulfurization capacity of wet materials, but also does not require loading and unloading of desulfurizers. The drying operation is carried out directly in the tower, and finally the dried tail gas is merged into the product coke oven gas pipeline in an environmentally friendly process route. Through this device, there is no need to load and unload desulfurizers, which reduces the loss of wet material replacement and the operating cost of wet material out of the tower. After the wet material is dried, the corresponding desulfurization technical conditions can still be met. Since the wet material is processed in the tower, the environment will not be polluted during the process, which is safe and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model.
[0017] Figure 1 This is a schematic structural diagram of a tower drying device for solid wet desulfurizer using its own gas provided in this application.
[0018] Figure markings: 2-gas pre-treatment device, 2.1-treatment device air inlet pipe, 2.2-pre-treatment device outlet pipe, 4.2-desulfurization tower, 6-fine desulfurization gas transmission main pipe, 9-gas heater, 9.1-steam inlet pipe, 9.2-steam outlet pipe, 9.3-gas inlet pipe, 9.4-gas outlet pipe, 13-tower inlet pipe. DETAILED DESCRIPTION
[0019] The present application provides a device for drying a solid wet desulfurizer in a tower using its own gas, which is specifically used in the field of desulfurization towers.
[0020] Coke oven gas uses iron oxide solid desulfurizer to complete the fine desulfurization of coke oven gas on an axial fixed bed. The fine desulfurization tower is close to the coking area. The desulfurization tower 4.2 in this embodiment is used for fine desulfurization of coke oven gas. Please refer to Figure 1 The desulfurization tower 4.2 is connected to a refined desulfurized gas delivery pipe 6 and a tower inlet pipe 13. The tower inlet pipe 13 is connected to the bottom of the desulfurization tower 4.2, and the refined desulfurized gas delivery pipe 6 is connected to the top of the desulfurization tower 4.2.
[0021] Hereinafter, the in-tower drying device utilizing its own gas solid wet desulfurizer will be referred to as this device.
[0022] Please refer to Figure 1 The device includes a gas heater 9, which can also be called a steam-gas heat exchanger. A cold channel and a hot channel are arranged inside the body of the gas heater 9, and the cold channel and the hot channel cooperate with each other. Figure 1 As shown, the gas heater 9 is connected to a steam inlet pipe 9.1, a steam outlet pipe 9.2, a gas inlet pipe 9.3 and a gas outlet pipe 9.4; the steam inlet pipe 9.1, the hot channel and the steam outlet pipe 9.2 are connected in sequence; the gas inlet pipe 9.3, the cold channel and the gas outlet pipe 9.4 are connected in sequence.
[0023] Please refer to Figure 1 The gas outlet pipe 9.4 is connected to the tower inlet pipe 13, and the gas inlet pipe 9.3 is used to input coke oven gas. The blast furnace gas from the cold source enters the cold channel of the gas heater 9 through the gas inlet pipe 9.3. On the other hand, the heat source steam enters the hot channel of the gas heater 9 from the steam inlet pipe 9.1. The blast furnace gas and the heat source steam exchange heat to increase the temperature of the blast furnace gas. The blast furnace gas with increased temperature is transported to the desulfurization tower 4.2 along the gas outlet pipe 9.4 and the tower inlet pipe 13, and the wet desulfurizer in the desulfurization tower 4.2 is dried in the tower.
[0024] In this way, the problem of reduced desulfurization capacity of wet materials is solved, and there is no need to load and unload desulfurizers. The drying operation is directly carried out in the tower on site, and the final drying tail gas is merged into the product coke oven gas pipeline, which is an environmentally friendly process route. Through this device, there is no need to load and unload desulfurizers, which reduces the loss of wet material replacement and the operating cost of wet material out of the tower. After the wet material is dried, it can still meet the corresponding desulfurization technical conditions. Since the wet material is processed in the tower, the process will not cause pollution to the environment, which is safe and environmentally friendly.
[0025] On the other hand, the desulfurization tower 4.2 used in this device originally involves coke oven gas, which is used as the medium gas for drying the wet material in the tower, reducing the large amount of medium consumption when nitrogen and other gases are used as the medium, and improving the problem of reduced calorific value of gas when nitrogen is used for drying in the tower.
[0026] In some embodiments, the desulfurization tower 4.2 is provided with an external insulation layer outside the tower body, and the external insulation layer is arranged around the tower body of the desulfurization tower 4.2. By providing the external insulation layer, the heat dissipation of the tower can be reduced, and the amount of heating steam can be saved. At the same time, in winter, the condensation phenomenon on the inner wall of the tower caused by the day and night temperature difference in the environment can be reduced, thereby reducing the risk of wet materials.
[0027] In some embodiments, see Figure 1 The desulfurization tower 4.2 is originally equipped with a gas preprocessor 2 to smoothly carry out the fine desulfurization process of the coke oven gas. The gas preprocessor 2 is connected to the tower inlet pipeline 13, and the coke oven gas is processed by the gas preprocessor 2 before entering the desulfurization tower 4.2 for fine desulfurization. Correspondingly, the gas preprocessor 2 is provided with a processor inlet pipeline 2.1, and the coke oven gas enters the gas preprocessor 2 through the processor inlet pipeline 2.1. Please refer to Figure 1 The gas inlet pipeline 9.3 is connected to the processor air inlet pipeline 2.1, and the processor air inlet pipeline 2.1 is used to deliver the coke oven gas to the gas inlet pipeline 9.3, thereby reducing the pipeline length of the gas inlet pipeline 9.3 and reducing the space occupied by the gas inlet pipeline 9.3.
[0028] In some embodiments, see Figure 1 A shut-off valve 7 and a flow regulating valve 8 are installed on the steam inlet pipe 9.1, which are used to control the on-off of steam and the ventilation volume of steam respectively.
[0029] In some embodiments, see Figure 1 The steam is liquefied after heat exchange, and a cut-off steam trap 10 is installed in the steam outlet pipe 9.2.
[0030] In some embodiments, see Figure 1The connection between the gas preprocessor 2 and the tower inlet pipeline 13 is specifically that the gas preprocessor 2 is provided with a preprocessor outlet pipeline 2.2, and the preprocessor outlet pipeline 2.2 is connected to the tower inlet pipeline 13. An outlet gas cut-off valve 3 is installed on the preprocessor outlet pipeline 2.2 to control the on-off of the preprocessor outlet pipeline 2.2. Inlet gas cut-off valves 4.1 and 5.1 are installed on the tower inlet pipeline 13 to control the on-off of the tower inlet pipeline 13.
[0031] In some embodiments, see Figure 1 A shut-off valve 1 is installed on the processor air inlet pipe 2.1 to control the input of coke oven gas.
[0032] In some embodiments, see Figure 1 The refined desulfurized gas transmission main 6 is equipped with outlet gas shut-off valves 4.3 and 5.3 to control the output of coke oven gas.
[0033] In fact, multiple desulfurization towers 4.2 are often arranged at the same time on site. In some embodiments, the device is applied to two or more desulfurization towers 4.2 at the same time, and the two or more desulfurization towers 4.2 are arranged in parallel, and the gas outlet pipeline 9.4 of the device is connected to the respective tower inlet pipelines 13 of all desulfurization towers 4.2. Figure 1 When the first desulfurization tower 4.2 is dried, the valve 11 is cut off and the valve 12 is opened to carry out the drying operation of the second desulfurization tower 5.2.
[0034] In some embodiments, the coal gas outlet pipeline 9.4 includes a main pipeline and at least two branch pipelines, the same number as the desulfurization tower 4.2, the branch pipelines are connected to the main pipeline, the main pipeline is connected to the gas heater 9, and a shut-off valve is installed on each branch pipeline. Figure 1 In the scheme shown, the shut-off valves of the two branch pipelines are 11 and 12 respectively.
[0035] Here, Figure 1The working process of the scheme shown is described in detail as follows: the room temperature coke oven gas of the inlet gas pipeline of the gas preprocessor 2 enters the gas heater 9 through the gas inlet pipeline 9.3 of the gas heater 9 for heating. After the coke oven gas is heated, it enters the first desulfurization tower 4.2 through the gas outlet pipeline 9.4 of the gas heater 9 and the shut-off valve 11 of the first desulfurization tower 4.2; the hot gas is evenly distributed in the tower and rises along the axial direction of the tower. When it encounters the wet desulfurizer filled in the tower, it heats and dries the wet desulfurizer. Finally, the heated wet gas passes through the first desulfurization tower 4.2, and then passes through the outlet gas shut-off valve 4.3 of the desulfurization tower 4.2, and is merged into the refined desulfurization gas delivery main 6; after the wet desulfurizer in the first desulfurization tower 4.2 is dried, the system switches to the second desulfurization tower 5.2 for drying; at this point, the drying process of the wet desulfurizer is completed, the moisture in the wet desulfurizer evaporates, and the wet desulfurizer is in a dry state.
[0036] The above operation must disconnect the solid wet desulfurizer tower to be dried from its production line. The solid wet desulfurizer tower refers to a desulfurization tower in which part of the desulfurizer in the tower is in a wet state, and all its inlet pipelines must be isolated.
[0037] The heating gas of this device adopts its own coke oven gas, and the drying operation gas volume generally does not exceed 4000m 3 / h, the operating temperature is controlled appropriately, and the drying tail gas is introduced into the product coke oven gas pipeline. The pipe diameter is selected based on the flow rate and the allowable pressure drop.
[0038] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.
[0039] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A tower drying device using its own gas solid wet desulfurizer, characterized in that: Applied to a desulfurization tower, the desulfurization tower is used for fine desulfurization of coke oven gas, the top of the desulfurization tower is connected to a fine desulfurization gas delivery main pipe, and the bottom of the desulfurization tower is connected to a tower inlet pipeline; The in-tower drying device for solid wet desulfurizer utilizing its own gas includes a gas heater, and the gas heater is connected with a steam inlet pipe, a steam outlet pipe, a gas inlet pipe and a gas outlet pipe. A cold channel and a hot channel for heat exchange are arranged inside the body of the gas heater, and the steam inlet pipe, the hot channel and the steam outlet pipe are connected in sequence, and the gas inlet pipe, the cold channel and the gas outlet pipe are connected in sequence, and the gas outlet pipe is connected to the tower inlet pipe, and the gas inlet pipe is used to input coke oven gas.
2. The in-tower drying device for solid wet desulfurization agent using self-gas as claimed in claim 1, characterized in that: The desulfurization tower is equipped with a gas pre-processor, which is connected to the tower inlet pipeline and is provided with a processor air inlet pipeline, and the coke oven gas to be processed enters the gas pre-processor through the processor air inlet pipeline; The gas inlet pipeline is connected to the processor gas inlet pipeline.
3. The in-tower drying device for solid wet desulfurization agent using self-gas as claimed in claim 1, characterized in that: The in-tower drying device utilizing its own gas solid wet desulfurizer is applied to two or more desulfurization towers, and the two or more desulfurization towers are arranged in parallel, and the coal gas outlet pipeline is connected to the respective tower inlet pipelines of all the desulfurization towers.
4. The in-tower drying device for utilizing self-gas solid wet desulfurization agent according to claim 3, characterized in that: The coal gas outlet pipeline includes a main pipeline and at least two branch pipelines with the same number as the desulfurization towers, the branch pipelines are connected to the main pipeline, the main pipeline is connected to the gas heater, and a shut-off valve is installed on each of the branch pipelines.
5. The in-tower drying device for solid wet desulfurization agent using self-gas as claimed in claim 1, characterized in that: The steam inlet pipeline is equipped with a cut-off valve and a flow regulating valve.
6. The in-tower drying device for solid wet desulfurization agent using self-gas as claimed in claim 1, characterized in that: The steam outlet pipeline is equipped with a cut-off drain valve.
7. The in-tower drying device for solid wet desulfurization agent using self-gas as claimed in claim 2, characterized in that: The coal gas pre-processor is provided with a pre-processor outlet pipeline, and the pre-processor outlet pipeline is connected to the tower inlet pipeline, so as to realize the connection between the coal gas pre-processor and the tower inlet pipeline; The outlet pipeline of the preprocessor is equipped with an outlet gas cut-off valve, and the inlet pipeline of the tower is equipped with an inlet gas cut-off valve.
8. The in-tower drying device for solid wet desulfurization agent using self-gas as claimed in claim 2, characterized in that: The processor air inlet pipeline is equipped with a cut-off valve.
9. The in-tower drying device for solid wet desulfurization agent using self-gas as claimed in claim 1, characterized in that: The refined desulfurized coal gas delivery main pipe is equipped with an outlet coal gas shut-off valve.
10. The in-tower drying device for solid wet desulfurization agent using self-gas as claimed in claim 1, characterized in that: The desulfurization tower is provided with an external heat-insulating layer outside the tower body, and the external heat-insulating layer is arranged around the tower body of the desulfurization tower.