Waste gas smoke dust heat exchange, dust removal and desulfurization integrated device

Abstract

The utility model belongs to the field of industrial waste gas treatment, and relates to a waste gas smoke dust heat exchange, dust removal and desulfurization integrated device, which comprises a cyclone dust removal assembly, a heat exchange module assembly and a desulfurization spray tower, and is characterized in that the heat exchange module assembly is provided with a heating medium inlet, a heating medium outlet, a refrigerant inlet and a refrigerant outlet; the top of the cyclone dust removal assembly is communicated with an upper connecting flue gas outlet pipe, the upper connecting flue gas outlet pipe is communicated with a heating medium inlet of the heat exchange module assembly, a heating medium outlet of the heat exchange module assembly is communicated with a pipeline, and the bottom of the pipeline is communicated with an inner cavity of the desulfurization spray tower; according to the waste gas smoke dust heat exchange, dust removal and desulfurization integrated device, energy conservation, consumption reduction and emission reduction are achieved, heat energy is recovered with great effort, heat energy recycling is achieved, dew points of discharged smoke are reduced and avoided, and normal and reliable operation of follow-up process equipment and facilities is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of industrial waste gas treatment, and specifically relates to an integrated device for waste gas, smoke heat exchange, dust removal and desulfurization. Background Art

[0002] At present, the traditional vertical kiln for calcining magnesite in China is mainly of "extensive" production type. The temperature of flue gas emitted by the vertical kiln can reach above 230°C, and the roasting temperature of ordinary magnesia products is as high as 1600°C. In addition, when adding materials to the furnace, dew point phenomenon is easily generated, resulting in the subsequent equipment being unable to operate normally and reliably. The treated flue gas is difficult to meet the requirements of the existing national air pollution control emission standards.

[0003] The existing roasting furnaces, flue gas dust removal and desulfurization process technology equipment and facilities have low utilization rate of waste heat from high-temperature flue gas, and serious waste of heat energy. Therefore, it is necessary to make improvements and propose an integrated device for waste gas and flue gas heat exchange, dust removal and desulfurization to solve the above problems. Utility Model Content

[0004] In order to solve the above problems, the utility model discloses an integrated device for waste gas and smoke heat exchange, dust removal and desulfurization.

[0005] In order to achieve the above object, the technical solution of the utility model is as follows:

[0006] An integrated device for waste gas and smoke heat exchange, dust removal and desulfurization comprises a cyclone dust removal component, a heat exchange module component and a desulfurization spray tower, the heat exchange module component is provided with a heat medium inlet, a heat medium outlet, a refrigerant inlet and a refrigerant outlet, the top of the cyclone dust removal component is connected with an upper connected flue gas outlet pipe, and the upper connected flue gas outlet pipe is connected with the heat medium inlet of the heat exchange module component, the heat medium outlet of the heat exchange module component is connected with a pipeline, the bottom of the pipeline is connected with the inner cavity of the desulfurization spray tower, and the top of the desulfurization spray tower is connected with the refrigerant inlet of the heat exchange module component.

[0007] As a preferred technical solution of the utility model, the heat medium inlet and the heat medium outlet are connected to the shell side of the heat exchange module assembly, and the refrigerant inlet and the refrigerant outlet are connected to the tube side of the heat exchange module assembly.

[0008] As a preferred technical solution of the utility model, the desulfurization spray tower includes a primary desulfurizer storage chamber, an air intake impact adsorption chamber, a secondary spray liquid storage chamber and a gas-liquid separation component arranged in sequence from bottom to top.

[0009] As a preferred technical solution of the utility model, a horizontal air intake pipe is arranged in the air intake impact adsorption chamber, and the air intake pipe is connected with the bottom of the pipeline, and an air distribution device is arranged on the air intake pipe.

[0010] As a preferred technical solution of the utility model, a first-stage tray-type water curtain sprayer is provided on the upper part of the air intake impact adsorption chamber, and a second-stage tray-type water curtain sprayer is provided on the upper part of the second-stage spray liquid storage chamber.

[0011] As a preferred technical solution of the utility model, a remote liquid level monitoring device is provided in the primary desulfurizer storage chamber and the secondary spray liquid storage chamber, and an automatic liquid replenishing port is provided on the primary desulfurizer storage chamber and the secondary spray liquid storage chamber, and the automatic liquid replenishing port is interlocked with the pump group through the remote liquid level monitoring device.

[0012] As a preferred technical solution of the utility model, the first-level desulfurizer liquid storage chamber includes a liquid storage cone bucket, a partition is provided on the liquid storage cone bucket, a desulfurizer circulation outlet pipe is provided on the other side of the partition, and a mud discharge pipe for regular sewage discharge is provided at the bottom of the liquid storage cone bucket.

[0013] As a preferred technical solution of the utility model, a vortex air inlet is arranged on the top of the cyclone dust removal component, and a lower automatic air locking and dust discharging device is arranged on the bottom thereof.

[0014] The beneficial effects of the utility model are:

[0015] This type of tray-type desulfurization treatment adsorption tower performs multi-stage purification spray desulfurization on industrial waste gas, so that the spray liquid and waste gas are fully and evenly mixed, thereby effectively improving the spray adsorption efficiency of the waste gas, and has the advantages of good waste gas cooling, purification, and desulfurization effects. In addition, the utility model performs heat exchange by setting a heat exchange module assembly, wherein the purified low-temperature gas enters the pipe side of the heat exchange module assembly through the refrigerant inlet, and the high-temperature purified flue gas sent by the cyclone dust removal assembly enters the shell side of the heat exchange module assembly through the heat medium inlet, and performs all-round heat exchange in the heat exchange module assembly to achieve high-temperature flue gas cooling and low-temperature purified gas heating; the cooled flue gas is sent to the desulfurization spray tower through a pipeline for desulfurization treatment. The gas with a higher temperature after heat exchange is sent to the subsequent device through the refrigerant outlet. The utility model makes every effort to realize device-based, closed and automated, and has the advantages of improving the recovery efficiency of exhaust flue gas. At the same time, it realizes energy saving, consumption reduction and emission reduction, makes every effort to recover heat energy, achieves heat energy recycling and utilization, reduces and avoids the dew point of exhaust flue gas, and ensures the normal and reliable operation of subsequent process equipment and facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an integrated device for waste gas and smoke heat exchange, dust removal and desulfurization in the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the primary desulfurizer liquid storage chamber of an integrated device for waste gas and smoke heat exchange, dust removal and desulfurization of the utility model;

[0018] Figure 3 The utility model is a schematic diagram of the structure of an air distribution device of an integrated device for waste gas and smoke heat exchange, dust removal and desulfurization.

[0019] List of Figure Symbols:

[0020] 1. Cyclone dust removal assembly; 2. Heat exchange module assembly; 3. Desulfurization spray tower; 4. Vortex air inlet; 5. Upper part connected to flue gas outlet pipe; 6. Middle support frame; 7. Lower automatic air lock and ash discharge device; 8. Heat medium inlet; 9. Heat medium outlet; 10. Refrigerant inlet; 11. Refrigerant outlet; 12. Primary desulfurizer storage chamber; 1201. Storage cone bucket; 1202. Partition; 1203. Outlet pipe; 1204. Mud discharge pipe; 13. Inlet impact adsorption chamber; 14. Secondary spray liquid storage chamber; 15. Gas-liquid separation assembly; 16. Pipeline; 17. Bracket; 18. Primary tray water curtain sprayer; 19. Secondary tray water curtain sprayer; 20. Inlet pipe; 21. Air distribution device; 22. Remote liquid level monitoring device; 23. Automatic liquid replenishment port; 24. Solenoid valve. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. It should be understood that the following specific implementations are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0022] Example: Figures 1 to 3 As shown, the utility model is an integrated device for waste gas and smoke heat exchange, dust removal and desulfurization, including a cyclone dust removal component 1, a heat exchange module component 2 and a desulfurization spray tower 3; the device is made of corrosion-resistant, wear-resistant, aging-resistant non-metallic materials or corrosion-resistant stainless steel 316L material, can operate continuously for a long period of time, and the service life is greater than 20 years; the cyclone dust removal component 1 includes a spiral air inlet 4, an upper connected flue gas outlet pipe 5, a middle support frame 6 and a lower automatic air locking ash discharge device 7; the heat exchange module component 2 includes a heat medium inlet 8, a heat medium outlet 9, a refrigerant inlet 10 and a refrigerant outlet 11; the desulfurization spray tower 3 includes a first-level desulfurizer storage chamber 12, an air intake impact adsorption chamber 13, a second-level spray liquid storage chamber 14 and a gas-liquid separation component 15 arranged in sequence from bottom to top; a pipeline 16 and a bracket 17 are provided between the heat exchange module component 2 and the desulfurization spray tower 3 for connection.

[0023] The high-temperature flue gas enters the cyclone dust removal assembly 1 from the spiral air inlet 4 and undergoes high-speed cyclone flow. Through the cyclone separation technology, the particles fall into the lower part of the dust removal device under the influence of gravity. The separated and dusted flue gas is connected to the heat medium inlet 8 of the heat exchange module assembly 2 through the upper connected flue gas outlet pipe 5, and enters the heat exchange module assembly 2 for heat exchange treatment. The collected smoke particles are sent to other devices for treatment by the lower automatic air lock ash discharge device 7.

[0024] The purpose of the heat exchange module assembly 2 is to exchange heat between high-temperature flue gas and low-temperature purified gas, wherein the purified low-temperature gas enters the tube side of the heat exchange module assembly 2 through the refrigerant inlet 10, and the high-temperature purified flue gas sent by the cyclone dust removal assembly 1 enters the shell side of the heat exchange module assembly 2 through the heat medium inlet 8, and performs all-round heat exchange in the heat exchange module assembly 2. The flue gas after cooling is sent to the desulfurization spray tower 3 through the pipeline 16 for desulfurization treatment. The gas with a higher temperature after heat exchange is sent to the subsequent device through the refrigerant outlet 11.

[0025] A primary tray-type water curtain sprayer 18 is provided on the upper part of the air intake impact adsorption chamber 13, and a secondary tray-type water curtain sprayer 19 is provided on the upper part of the secondary spray liquid storage chamber 14; an air intake pipe 20 is provided on the air intake impact adsorption chamber 13, and an air distribution device 21 is provided on the air intake pipe 20.

[0026] A remote liquid level monitoring device 22 is provided in the primary desulfurizer storage chamber 12 and the secondary spray liquid storage chamber 14. An automatic liquid replenishment port 23 is provided on the primary desulfurizer storage chamber 12 and the secondary spray liquid storage chamber 14. The remote liquid level monitoring device 22 is interlocked with the pump group, and the pump group is stopped and started at the ultra-high and low warning line position. If the pump group operates normally, the liquid level in the chamber is still at a low level. When the liquid level reaches the low alarm line of the remote liquid level monitoring device 22, the solenoid valve 24 set on the liquid replenishment pipeline will be automatically opened to realize automatic liquid replenishment of the system. When the liquid replenishment level reaches the high alarm line of the remote liquid level monitoring device 22, the solenoid valve 24 set on the liquid replenishment pipeline will be automatically closed.

[0027] The primary desulfurizing agent storage chamber 12 includes a storage cone bucket 1201, a partition 1202 is provided on the storage cone bucket 1201, an outlet pipe 1203 is provided on the other side of the partition 1202 for circulating spraying of the desulfurizing agent, and a mud discharge pipe 1204 is provided at the bottom of the storage cone bucket 1201 for regular sewage discharge. The partition 1202 is used to block the sludge generated after the intake air contacts the desulfurizing agent, so that the sludge sinks to the bottom of the storage cone bucket 1201 and is regularly discharged from the mud discharge pipe 1204. The partition 1202 is provided so that the supernatant in the storage chamber can be discharged from the outlet pipe 1203 for recycling.

[0028] The gas-liquid separation component 15 is provided to achieve the purpose of gas-liquid separation of the purified gas after desulfurization treatment, and to prevent the liquid phase from entering the subsequent system and causing adverse effects.

[0029] The primary tray type water curtain sprayer 18 and the secondary tray type water curtain sprayer 19 are both tray type, simple in structure, easy to install and manufacture, and have the advantages of uniform spraying, large flexible operation of gas volume, less mist entrainment, small pressure difference, high separation coefficient, fast desorption speed, and long service life.

[0030] The utility model has the advantages of small footprint, flexible layout, reasonable and beautiful appearance, full use of site and original facilities and pipeline network, reduced pipeline length, lower pressure drop and reduced investment.

[0031] The working principle of the exhaust gas and dust heat exchange, dust removal and desulfurization integrated device:

[0032] Under the negative pressure of the induced draft fan of the project, the high-temperature flue gas enters the cyclone dust removal component 1 through the collection pipe 16 for high-speed cyclone and dust removal. The flue gas after dust removal enters the heat exchange module component 2, and the high-temperature flue gas in the shell side is heat exchanged with the low-temperature purified gas in the tube side. The cooled flue gas is sent to the desulfurization spray tower 3 through the pipe 16 for desulfurization treatment. When the flue gas enters the desulfurization spray tower 3 and moves upward from bottom to top, it collides and contacts with the desulfurizer and industrial water sprayed and atomized uniformly from top to bottom through the multi-layer specially designed tray structure flow channel set in the tower, so that the gas-liquid two phases can be fully transferred in mass and heat. After colliding and contacting with the purified liquid, on the one hand, the temperature can be reduced and the granular and water-soluble odorous gas components can be removed at the same time. On the other hand, the soluble acidic gas can be effectively neutralized under the action of the spray desulfurizer or alkaline substance, which can prevent the occurrence of flue gas escape in the spray atomization tower to the greatest extent, which is impossible for conventional spray adsorption towers. The purified gas after the above treatment enters the gas-liquid separation layer to remove the liquid phase in the gas, and is then directly sent to the tube side of the heat exchange module assembly 2 to perform heat exchange treatment with the high-temperature flue gas.

[0033] The utility model has the advantages of compact structure, convenient operation and maintenance, high efficiency in processing industrial waste gas, high purification efficiency, device-based, closed and automated, and energy saving, consumption reduction and emission reduction.

[0034] It should be noted that the above content only illustrates the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model. These improvements and modifications all fall within the protection scope of the claims of the utility model.

Claims

1. An integrated device for waste gas and smoke heat exchange, dust removal and desulfurization, comprising a cyclone dust removal component (1), a heat exchange module component (2) and a desulfurization spray tower (3), characterized in that: The heat exchange module assembly (2) is provided with a heat medium inlet (8), a heat medium outlet (9), a refrigerant inlet (10) and a refrigerant outlet (11); the top of the cyclone dust removal assembly (1) is connected to an upper connected flue gas outlet pipe (5), and the upper connected flue gas outlet pipe (5) is connected to the heat medium inlet (8) of the heat exchange module assembly (2); the heat medium outlet (9) of the heat exchange module assembly (2) is connected to a pipeline (16), the bottom of the pipeline (16) is connected to the inner cavity of the desulfurization spray tower (3), and the top of the desulfurization spray tower (3) is connected to the refrigerant inlet (10) of the heat exchange module assembly (2).

2. The exhaust gas and dust heat exchange, dust removal and desulfurization integrated device according to claim 1 is characterized in that: The heat medium inlet (8) and the heat medium outlet (9) are connected to the shell side of the heat exchange module assembly (2), and the refrigerant inlet (10) and the refrigerant outlet (11) are connected to the tube side of the heat exchange module assembly (2).

3. The exhaust gas and dust heat exchange, dust removal and desulfurization integrated device according to claim 1 is characterized in that: The desulfurization spray tower (3) comprises a primary desulfurization agent storage chamber (12), an air intake impact adsorption chamber (13), a secondary spray liquid storage chamber (14) and a gas-liquid separation component (15) arranged in sequence from bottom to top.

4. The exhaust gas and dust heat exchange, dust removal and desulfurization integrated device according to claim 3 is characterized in that: A transverse air intake pipe (20) is arranged in the air intake impact adsorption chamber (13), and the air intake pipe (20) is connected to the bottom of the pipeline (16), and an air distribution device (21) is arranged on the air intake pipe (20).

5. The exhaust gas and dust heat exchange, dust removal and desulfurization integrated device according to claim 3 is characterized in that: A primary tray-type water curtain sprayer (18) is provided on the upper part of the air intake impact adsorption chamber (13), and a secondary tray-type water curtain sprayer (19) is provided on the upper part of the secondary spray liquid storage chamber (14).

6. The exhaust gas and dust heat exchange, dust removal and desulfurization integrated device according to claim 5 is characterized in that: The first-stage desulfurizing agent storage chamber (12) and the second-stage spraying liquid storage chamber (14) are both provided with a remote liquid level monitoring device (22), and the first-stage desulfurizing agent storage chamber (12) and the second-stage spraying liquid storage chamber (14) are both provided with an automatic liquid replenishing port (23), and the automatic liquid replenishing port (23) is interlocked with the pump group through the remote liquid level monitoring device (22).

7. The exhaust gas and dust heat exchange, dust removal and desulfurization integrated device according to claim 3 is characterized in that: The primary desulfurizing agent storage chamber (12) comprises a liquid storage cone bucket (1201), a partition (1202) is provided on the liquid storage cone bucket (1201), a desulfurizing agent circulation outlet pipe (1203) is provided on the other side of the partition (1202), and a mud discharge pipe (1204) for regular sewage discharge is provided at the bottom of the liquid storage cone bucket (1201).

8. The exhaust gas and dust heat exchange, dust removal and desulfurization integrated device according to claim 1 is characterized in that: The top of the cyclone dust removal assembly (1) is provided with a spiral air inlet (4), and the bottom thereof is provided with a lower automatic air-locking dust-discharging device (7).

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