Zinc smelting flue gas desulfurization device

Abstract

The utility model discloses a zinc smelting flue gas desulfurization device, and belongs to the technical field of environmental protection equipment. According to the structure of the device, a mixing area, a filter screen, a heat exchange device, a packed bed and an absorption area are arranged in an air path in the airflow flowing direction, the output side of an air suction device is connected with a discharge channel, a plurality of ejectors are arranged in the mixing area, liquid outlet pipes are arranged in the ejectors, a filter and a pump body are arranged on one side of each liquid outlet pipe, and the filter screen is arranged on the other side of each liquid outlet pipe. A conical head is arranged on the other side of the liquid outlet pipe, an outer sleeve body is arranged on the outer side of the filter, a supporting frame is fixed between the outer sleeve body and the liquid outlet pipe, and a disc-shaped cavity is formed in the position, on the rear side of the conical head, outside the liquid outlet pipe. According to the device, a one-way treatment channel is established, alkaline slurry and flue gas are mixed in a jet flow mode and enter a packed bed to be in full contact after primary filtration and temperature adjustment, and then a mixing reaction is completed through a scattering structure. The device disclosed by the utility model is higher in mass transfer efficiency, better in removal effect and obvious in technical advantage.

Description

TECHNICAL FIELD

[0001] The utility model belongs to environmental protection equipment technical field, concretely is a kind of zinc smelting flue gas desulfurization device. BACKGROUND

[0002] Zinc smelting flue gas contains a large amount of sulfur dioxide, sulfur trioxide, nitrogen oxides and heavy metal particles. Among them, sulfur dioxide and sulfur trioxide content is serious to the environment pollution, need to remove after discharging. Sulfur oxides in flue gas are essentially acidic, and can be removed from flue gas by reacting with appropriate alkaline substances. The most commonly used alkaline substances for flue gas desulfurization are limestone, quicklime and hydrated lime. Limestone is abundant and relatively cheap, and quicklime and hydrated lime are both produced from limestone by heating. Sometimes sodium carbonate (soda ash), magnesium carbonate and ammonia and other alkaline substances are also used. The alkaline substances used react with sulfur oxides in flue gas to produce a mixture of sulfites and sulfates (depending on the alkaline substance used, these salts can be calcium, sodium, magnesium or ammonium salts). The ratio between sulfites and sulfates depends on the process conditions, and in some processes, all sulfites are converted to sulfates. The reaction between sulfur oxides and alkaline substances occurs either in alkaline solution (wet flue gas desulfurization technology) or on the wetted surface of solid alkaline substances (dry or semi-dry flue gas desulfurization technology). In the prior art, dry desulfurization has lower requirements for equipment and is relatively easy to implement, but the mass transfer efficiency still has room for improvement. In this case, how to promote mass exchange and improve mass transfer mode during the reaction is the key to overcoming this problem. SUMMARY

[0003] The technical problem to be solved by the utility model is how to improve the overall mass transfer efficiency of the dry desulfurization process.

[0004] To achieve the above technical purposes, the utility model adopts the following technical scheme:

[0005] A zinc smelting flue gas desulfurization device, comprising a gas path, a blower, an air suction device, a mixing zone, a filter screen, a heat exchange device, a filler bed, an absorption zone, a discharge channel, an injector, a pump body, a filter, a liquid outlet pipe, an outer sleeve, a support frame, a disc-shaped cavity and a cone head; the blower and the air suction device are respectively arranged at the upstream and downstream of the gas path, the mixing zone, the filter screen, the heat exchange device, the filler bed and the absorption zone are respectively arranged in the gas path along the airflow direction, the output side of the air suction device is connected with the discharge channel, a plurality of injectors are arranged in the mixing zone, a liquid outlet pipe is arranged in the injector, a filter and a pump body are arranged on one side of the liquid outlet pipe, a cone head is arranged on the other side of the liquid outlet pipe, an outer sleeve is arranged outside the filter, a support frame is fixed between the outer sleeve and the liquid outlet pipe, and a disc-shaped cavity is arranged outside the liquid outlet pipe at the rear side of the cone head.

[0006] Preferably, the air supply device comprises a pipe, a mounting base, a fixing frame, a motor, a transmission belt, and an impeller, the fixing frame is arranged inside the pipe, the mounting base is arranged on the fixing frame, a main shaft is arranged on the mounting base, an impeller is connected to one side of the main shaft, a driven wheel is connected to the other side of the main shaft, a motor is arranged on the pipe, a driving wheel is arranged on the motor, and a transmission belt is connected between the driving wheel and the driven wheel.

[0007] Preferably, the air supply device and the air suction device have the same structure.

[0008] Preferably, the transmission belt is a belt or a synchronous belt.

[0009] Preferably, a plurality of mixing structures are arranged side by side in the absorption zone, each of the mixing structures comprises a horizontal pipe, a tapered horizontal pipe, a tapered horizontal cavity, a vertical cavity, and a communication ring, the tapered horizontal pipe is arranged at the rear of the horizontal pipe, the tapered horizontal cavity is arranged at the front of the horizontal pipe, the communication ring is arranged beside the intersection of the tapered horizontal cavity and the tapered horizontal pipe, and the vertical cavity is arranged outside the communication ring.

[0010] Preferably, the discharge channel comprises a pipe body, an input pipe, an auger, a wire mesh, a water distributor, and filter material, the inner end of the input pipe is connected to the inside of the pipe body, the outer end of the input pipe is kept outside the pipe body, the auger is arranged outside the input pipe, the wire mesh is arranged inside the pipe body, the water distributor is arranged above the auger, and the filter material is arranged on the upper part of the pipe body.

[0011] Preferably, spherical fillers and wire mesh fillers are arranged below the filter material, respectively.

[0012] Preferably, support discs are fixedly arranged below the filter material, and the spherical fillers and the wire mesh fillers are arranged on the support discs.

[0013] In the aspect of construction, the air path is a flow channel for the flue gas to be treated, and the air supply device and the air suction device drive the air flow to move. The mixing area is a mixing section of the limestone powder slurry and the flue gas, in which the slurry is sprayed by using the ejector. The outlet pipe is in communication with the slurry pool of the limestone powder slurry, and provides the spraying power under the driving of the pump body. The filter is a large-pore filter, which intercepts the un-dispersed blocks in the slurry. The support frame is fixed between the outer sleeve body and the outlet pipe, the heater is installed in the outer sleeve body, and the heater preheats the slurry to ensure the flowability and initial temperature of the slurry. The disc-shaped cavity maintains the temperature, and the heater can be further arranged. The cone head is a spraying position, and the distributor can be additionally arranged to spray and disperse the slurry. The sprayed slurry is preliminarily mixed with the flue gas, and moves forward under the carrying of the flue gas to the filter screen, and then reaches the heat exchange device after removing the large-particle impurities. The heat exchange device adjusts the temperature, and then the slurry is dispersed in the filler bed to fully ensure the contact area. In the absorption area, the mixing structure arranged side by side plays a scattering role, the internal conical cavity locally accelerates the fluid, and promotes the mixing of the substances. Finally, the slurry is transported to the discharge channel, and the purification device such as a spray is arranged in the discharge channel, and the treated flue gas is discharged after being purified.

[0014] The utility model discloses a zinc smelting flue gas desulfurization device. This device establishes a one-way processing channel, adopts the jet flow mode to realize the mixing of alkaline slurry and flue gas, enters the filler bed after preliminary filtration and temperature adjustment to contact fully, and then utilizes the scattering structure to complete the mixing reaction. The mass transfer efficiency of the utility model is higher, the removal effect is better, and the technical advantage is obvious. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the system structure diagram of the utility model;

[0016] Fig. 2 It is the schematic diagram of the ejector;

[0017] Fig. 3 It is the forward schematic diagram of air supply device and air suction device;

[0018] Fig. 4 It is the lateral schematic diagram of air supply device and air suction device;

[0019] Fig. 5 It is the local schematic diagram of mixing structure in absorption area;

[0020] Fig. 6 It is the whole schematic diagram of mixing structure in absorption area;

[0021] Fig. 7 It is the schematic diagram of discharge channel;

[0022] Fig. 8 It is the schematic diagram of support disc;

[0023] In the drawing:

[0024] 1. air path 2. air supply device 3. air suction device 4. mixing zone

[0025] 5. filter screen 6. heat exchange device 7. packed bed 8. absorption zone

[0026] 9. discharge passage 10. ejector 11. pump body 12. filter

[0027] 13. liquid outlet pipe 14. sheath body 15. support frame 16. disc-shaped cavity

[0028] 17. conical head 18. pipe 19. mounting seat 20. fixing frame

[0029] 21. motor 22. transmission belt 23. impeller 24. horizontal pipe

[0030] 25. conical horizontal pipe 26. conical horizontal cavity 27. vertical cavity 28. communication ring

[0031] 29. pipe body 30. input pipe 31. auger 32. wire screen

[0032] 33. water distributor 34. wire screen packing 35. support disc 36. spherical packing

[0033] 37. filter material. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, those skilled in the art can know that, as technology develops and new scenarios appear, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0035] In the description of the present application, it should be understood that, unless otherwise defined, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those skilled in the art to which the present application belongs. In addition, any term used is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0036] In addition, in order to better illustrate the present application, a large number of specific details are given in the specific embodiments below. Those skilled in the art should understand that the present application can also be implemented without some specific details. In some examples, methods, means, elements and circuits that are well known to those skilled in the art are not described in detail, in order to highlight the main idea of the present application.

[0037] Example 1

[0038] A zinc smelting flue gas desulfurization device, see Figs. 1-8 , comprising a gas path 1, a blower 2, a suction device 3, a mixing area 4, a filter screen 5, a heat exchange device 6, a filler bed 7, an absorption area 8, a discharge channel 9, an injector 10, a pump body 11, a filter 12, a liquid outlet pipe 13, an outer sleeve body 14, a support frame 15, a disc-shaped cavity 16, and a cone head 17. The blower 2 and the suction device 3 are respectively arranged at the upstream and downstream of the gas path 1, and the mixing area 4, the filter screen 5, the heat exchange device 6, the filler bed 7, and the absorption area 8 are respectively arranged in the gas path 1 along the flow direction of the gas flow. The output side of the suction device 3 is connected with the discharge channel 9. The mixing area 4 is provided with a plurality of injectors 10. The injector 10 is provided with the liquid outlet pipe 13. The liquid outlet pipe 13 is provided with the filter 12 and the pump body 11 on one side, and is provided with the cone head 17 on the other side. The filter 12 is provided with the outer sleeve body 14. The support frame 15 is fixed between the outer sleeve body 14 and the liquid outlet pipe 13. The disc-shaped cavity 16 is arranged outside the liquid outlet pipe 13 at the rear side of the cone head 17. The gas path 1 is a flow channel of the flue gas to be treated. The blower 2 and the suction device 3 drive the gas flow. The mixing area 4 is a mixing section of the limestone powder slurry and the flue gas. In this section, the slurry is injected by the injector 10. The liquid outlet pipe 13 is in communication with a pool of the limestone powder slurry, and provides injection power under the driving of the pump body 11. The filter 12 is a large-pore filter, which intercepts the un-dispersed blocks in the slurry. The support frame 15 is fixed between the outer sleeve body 14 and the liquid outlet pipe 13. The outer sleeve body 14 is provided with a heating device, which preheats the slurry and ensures the flowability and initial temperature of the slurry. The disc-shaped cavity 16 maintains the temperature, and can be further provided with a heating device. The cone head 17 is a spraying position, which can be provided with a distributor for dispersing and spraying the slurry. The sprayed slurry is preliminarily mixed with the flue gas, and moves forward under the carrying of the flue gas to the filter screen 5. After filtering out the large-particle impurities, the flue gas reaches the heat exchange device 6, which adjusts the temperature. Then, the flue gas is dispersed in the filler bed 7, so as to ensure the contact area. In the absorption area 8, the mixed structures arranged side by side scatter the fluid, accelerate the fluid in the internal conical cavity, and promote the mixing of the substances. Finally, the flue gas is transported to the discharge channel 9, which is provided with a spraying and other purification devices. The treated flue gas is discharged after being purified.

[0039] Example 2

[0040] A zinc smelting flue gas desulfurization device, see Figs. 1-8, including air path 1, air supply device 2, air suction device 3, mixing area 4, filter screen 5, heat exchange device 6, filler bed 7, absorption area 8, discharge channel 9, injector 10, pump body 11, filter 12, liquid outlet pipe 13, sleeve body 14, support frame 15, disc-shaped cavity 16, cone head 17; air supply device 2 and air suction device 3 are respectively arranged at the upstream and downstream of air path 1, mixing area 4, filter screen 5, heat exchange device 6, filler bed 7 and absorption area 8 are respectively arranged in air path 1 along the airflow direction, the output side of air suction device 3 is connected with discharge channel 9, a plurality of injectors 10 are arranged in mixing area 4, liquid outlet pipe 13 is arranged in injector 10, filter 12 and pump body 11 are arranged on one side of liquid outlet pipe 13, cone head 17 is arranged on the other side of liquid outlet pipe 13, sleeve body 14 is arranged outside filter 12, support frame 15 is fixed between sleeve body 14 and liquid outlet pipe 13, disc-shaped cavity 16 is arranged outside liquid outlet pipe 13 at the rear side of cone head 17. Air supply device 2 comprises pipeline 18, mounting base 19, fixing frame 20, motor 21, transmission belt 22 and impeller 23, fixing frame 20 is arranged inside pipeline 18, mounting base 19 is arranged on fixing frame 20, main shaft is arranged on mounting base 19, impeller 23 is connected with one side of main shaft, driven wheel is connected with the other side of main shaft, motor 21 is arranged on pipeline 18, driving wheel is arranged on motor 21, transmission belt 22 is connected between driving wheel and driven wheel. Air supply device 2 and air suction device 3 have the same structure. Transmission belt 22 is a belt or a synchronous belt. A plurality of mixing structures are arranged side by side in absorption area 8, each mixing structure comprises horizontal pipe 24, conical horizontal pipe 25, conical horizontal cavity 26, vertical cavity 27 and communication ring 28, conical horizontal pipe 25 is arranged at the rear of horizontal pipe 24, conical horizontal cavity 26 is arranged at the front of horizontal pipe 24, communication ring 28 is arranged at the side of the intersection position of conical horizontal cavity 26 and conical horizontal pipe 25, vertical cavity 27 is arranged outside communication ring 28. Discharge channel 9 comprises pipe body 29, input pipe 30, auger 31, wire mesh 32, water distributor 33 and filter material 37, the inner end of input pipe 30 is connected to the inside of pipe body 29, the outer end of input pipe 30 is kept outside pipe body 29, auger 31 is arranged outside input pipe 30, wire mesh 32 is arranged inside pipe body 29, water distributor 33 is arranged above auger 31, filter material 37 is arranged on the upper part of pipe body 29. Spherical filler 36 and wire mesh filler 34 are respectively arranged below filter material 37. Support disc 35 is fixedly arranged below filter material 37, spherical filler 36 and wire mesh filler 34 are arranged on support disc 35.

[0041] In view of the foregoing, after reading this detailed disclosure, those skilled in the art can appreciate that the foregoing detailed disclosure can be presented only in an exemplary manner, and can not be limiting. Although not explicitly described herein, those skilled in the art can understand that the present application intends to encompass various reasonable changes, improvements and modifications to the embodiments. These changes, improvements and modifications are intended to be presented by the present application, and are within the spirit and scope of the exemplary embodiments of the present application.

[0042] It should be understood that in the foregoing description of embodiments of the present application, for the purpose of facilitating understanding of one feature, the present application combines various features in a single embodiment, drawing or its description for the purpose of simplifying the present application. However, this does not mean that the combination of these features is necessary, and it is entirely possible for those skilled in the art to extract part of the features as a separate embodiment when reading the present application.

[0043] It should be understood that the embodiments disclosed herein are illustrative of the principles of the present application. Other modified embodiments are within the scope of the present application. The embodiments disclosed herein are merely examples and are not limiting of the embodiments of the present application, which is limited only by the claims precisely described above.

Claims

1. A zinc smelting off-gas desulphurization apparatus, characterized in that, The application relates to a gas path (1), air supply device (2), air suction device (3), mixing area (4), filter screen (5), heat exchange device (6), filler bed (7), absorption area (8), discharge channel (9), injector (10), pump body (11), filter (12), liquid outlet pipe (13), sleeve body (14), support frame (15), disc-shaped cavity (16), cone head (17); the air supply device (2) and the air suction device (3) are arranged at the upstream and downstream of the gas path (1) respectively, the mixing area (4), the filter screen (5), the heat exchange device (6), the filler bed (7) and the absorption area (8) are arranged in the gas path (1) along the flowing direction of the gas flow, the output side of the air suction device (3) is connected with the discharge channel (9), a plurality of injectors (10) are arranged in the mixing area (4), the liquid outlet pipe (13) is arranged in the injector (10), the filter (12) and the pump body (11) are arranged on one side of the liquid outlet pipe (13), the cone head (17) is arranged on the other side of the liquid outlet pipe (13), the sleeve body (14) is arranged outside the filter (12), the support frame (15) is fixed between the sleeve body (14) and the liquid outlet pipe (13), and the disc-shaped cavity (16) is arranged outside the liquid outlet pipe (13) at the rear side of the cone head (17).

2. A zinc smelting off-gas desulphurization device according to claim 1, characterized in that, The air supply device (2) comprises a pipeline (18), a mounting base (19), a fixing frame (20), a motor (21), a transmission belt (22) and an impeller (23), the fixing frame (20) is arranged inside the pipeline (18), the mounting base (19) is arranged on the fixing frame (20), a main shaft is arranged on the mounting base (19), the impeller (23) is connected to one side of the main shaft, a driven wheel is connected to the other side of the main shaft, the motor (21) is arranged on the pipeline (18), a driving wheel is arranged on the motor (21), and the transmission belt (22) is connected between the driving wheel and the driven wheel.

3. A zinc smelting off-gas desulphurization device according to claim 2, characterized in that, The air supply device (2) and the air suction device (3) are of the same structure.

4. A zinc smelting off-gas desulphurization device according to claim 2, characterized in that, The transmission belt (22) is a belt or a synchronous belt.

5. A zinc smelting off-gas desulphurization device according to claim 1, characterized in that, A plurality of mixing structures are arranged side by side in the absorption area (8), each of the mixing structures comprises a horizontal pipe (24), a conical horizontal pipe (25), a conical horizontal cavity (26), a vertical cavity (27) and a communication ring (28), the conical horizontal pipe (25) is arranged at the rear of the horizontal pipe (24), the conical horizontal cavity (26) is arranged at the front of the horizontal pipe (24), the communication ring (28) is arranged at the side of the intersection position of the conical horizontal cavity (26) and the conical horizontal pipe (25), and the vertical cavity (27) is arranged outside the communication ring (28).

6. A zinc smelting off-gas desulphurization device according to claim 1, characterized in that, The discharge channel (9) comprises a pipe body (29), an input pipe (30), an auger (31), a wire screen (32), a water distributor (33) and filter material (37), the inner end of the input pipe (30) is connected to the inside of the pipe body (29), the outer end of the input pipe (30) is kept outside the pipe body (29), the auger (31) is arranged outside the input pipe (30), the wire screen (32) is arranged inside the pipe body (29), the water distributor (33) is arranged above the auger (31), and the filter material (37) is arranged at the upper portion of the pipe body (29).

7. A zinc smelter off-gas desulphurization device according to claim 6, characterized in that, A spherical filler (36) and a wire mesh filler (34) are arranged below the filter material (37) respectively.

8. A zinc smelting off-gas desulphurization device according to claim 7, characterized in that A support disc (35) is fixedly arranged below the filter material (37), and the spherical filler (36) and the wire mesh filler (34) are arranged on the support disc (35).

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