SDS sodium-based dry desulfurization ash circulating and returning device

Abstract

The utility model belongs to the technical field of desulfurization equipment, and particularly relates to an SDS (Sodium Dodecyl Sulfate) sodium-based dry desulfurization ash circulating and returning device, which is characterized in that a dust backflow pipeline of a dust remover and a sodium bicarbonate injection pipeline are connected with a smoke dust channel; newly added sodium bicarbonate or sodium bicarbonate returned from the dust backflow pipeline of the dust remover is fed into the desulfurizing tower by utilizing the air flow of the smoke dust channel, a special blowing device does not need to be arranged, and the structure is simple. The adding amount of returned sodium bicarbonate and the injection amount of new sodium bicarbonate are controlled through electromagnetic valves on a dust backflow pipeline and a sodium bicarbonate injection pipeline of the dust remover, and the new adding amount of sodium bicarbonate is reduced. Due to the fact that the dust backflow pipeline of the dust remover and the sodium bicarbonate injection pipeline are vertically arranged above the smoke dust channel, materials can enter the smoke dust channel under the action of gravity, and energy conservation and emission reduction are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to desulfurization equipment technical field, concretely relates to a SDS sodium base dry method desulfurization ash circulation feed device. BACKGROUND

[0002] The SDS sodium base dry method desulfurization of gas boiler uses sodium bicarbonate and boiler flue gas to carry out single chemical reaction to desulfurize flue gas, in order to guarantee that desulfurization meets the emission standard, usually 30% sodium bicarbonate that is not completely reacted is doped in the byproduct (desulfurization ash) after desulfurization, which causes a large amount of desulfurizer to be wasted, and increases the desulfurization cost, so it is needed to recycle it by the circulation feed structure.

[0003] Chinese patent document CN211725287U (CN202020230397.4) discloses a kind of SDS sodium base dry method desulfurization ash circulation feed device of gas boiler, the device can recycle sodium bicarbonate that is not completely reacted and is doped in desulfurization ash during use, reduces the waste of desulfurizer, reduces desulfurization cost, but in actual circulation process, the injection amount of new sodium bicarbonate cannot be adjusted according to the sodium bicarbonate of feed, which causes new sodium bicarbonate to be added with the same injection amount all the time, and further causes waste of new sodium bicarbonate. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem in the prior art, provides a kind of SDS sodium base dry method desulfurization ash circulation feed device, which uses the flue gas flow in smoke channel as power to send the material returned by dust collector dust backflow pipeline and the material newly added by sodium bicarbonate injection pipeline into desulfurization tower to react, more energy-saving, and electromagnetic valve is respectively arranged in dust collector dust backflow pipeline and sodium bicarbonate injection pipeline, according to desulfurization effect, while adding dust collector dust, the amount of newly added sodium bicarbonate is reduced, and further help to reduce cost.

[0005] The technical problem to be solved by the utility model is solved by the following technical scheme: a kind of SDS sodium base dry method desulfurization ash circulation feed device, including desulfurization tower, smoke channel, dust collector dust backflow pipeline and sodium bicarbonate injection pipeline;

[0006] The smoke channel is connected with the inlet of desulfurization tower;

[0007] The dust collector dust backflow pipeline and the sodium bicarbonate injection pipeline are connected with the smoke channel, and the dust collector dust backflow pipeline and the sodium bicarbonate injection pipeline are vertically arranged above the smoke channel;

[0008] The dust collector dust backflow pipeline and the sodium bicarbonate injection pipeline are respectively provided with electromagnetic valve.

[0009] The utility model discloses preferably further include dust remover, the air inlet of dust remover is connected with the gas outlet of desulfurization tower,

[0010] The dust outlet of the dust remover is connected with the dust backflow pipeline of the dust remover. With the desulfurization, 30% of the unreacted sodium bicarbonate will gather on the dust bag of the dust remover, and then the dust remover performs self-dust removal, and the unreacted sodium bicarbonate enters the dust backflow pipeline of the dust remover through the dust outlet and enters the smoke dust channel.

[0011] The utility model discloses preferably further include flow guide module, flow guide module includes horizontal flow guide pipe, vertical flow guide pipe, flow guide plate and drive module,

[0012] The horizontal flow guide pipe is horizontally arranged on the upper end of the vertical flow guide pipe, and the two ends of the horizontal flow guide pipe are closed.

[0013] The flow guide plate is arranged in the horizontal flow guide pipe and can slide axially left and right, and the drive module is used for controlling the sliding of the flow guide plate.

[0014] The flow guide plate is sealingly connected with the inner wall of the horizontal flow guide pipe, and the flow guide plate is located above the inlet of the vertical flow guide pipe.

[0015] The dust backflow pipeline of the dust remover and the sodium bicarbonate injection pipeline are connected with the horizontal flow guide pipe, and the discharge outlets of the dust backflow pipeline of the dust remover and the sodium bicarbonate injection pipeline are located on the two sides of the flow guide plate. The flow guide module can control the communication area of the dust backflow pipeline of the dust remover and the inlet of the vertical flow guide pipe and the sodium bicarbonate injection pipeline and the inlet of the vertical flow guide pipe, and control the proportion relationship of the newly added sodium bicarbonate and the recycled sodium bicarbonate.

[0016] The utility model discloses preferably, drive module includes rotatable setting in the screw rod of horizontal flow guide pipe center and with screw rod connects drive motor,

[0017] The drive motor is fixedly arranged on the outside of the horizontal flow guide pipe, and the screw rod is threadedly connected with the flow guide plate. The screw rod drives the flow guide plate to slide axially left and right along the horizontal flow guide pipe.

[0018] The utility model discloses preferably, flow guide module still includes screen, screen setting is at flow guide plate lower extreme, with horizontal flow guide pipe sliding cooperation. The screen can screen the dust backflow from the dust backflow pipeline of the dust remover and the new sodium bicarbonate, avoid the dust scab and the agglomeration, influence the reaction of subsequent, through the dispersion of screen, under the action of smoke dust flow, more evenly enter the desulfurization tower and carry out the reaction.

[0019] The utility model discloses preferably, first guide groove is provided on the transverse flow guide pipe, and the screen is arranged in first guide groove. The screen is arranged in first guide groove, can better fit the vertical flow guide pipe above the entrance.

[0020] The utility model discloses preferably, the lateral wall of transverse flow guide pipe is provided with the access door. Through setting up the access door on the lateral wall of transverse flow guide pipe, avoid the particle to block the screen, carry out the cleaning to the screen.

[0021] The utility model discloses preferably, second guide groove is provided on the transverse flow guide pipe,

[0022] The upper end of the flow guide plate is provided with the slider matched with the second guide groove. The slider is arranged in the second guide groove, when the screw rotates, can drive the flow guide plate and make linear motion along the axial direction of the screw.

[0023] The utility model discloses preferably, the air inlet of dust remover and the air outlet of desulfurizing tower are provided with the connecting pipe.

[0024] Compared with the prior art, the beneficial effects of the utility model are: the SDS sodium-based dry desulfurized ash circulating feed device of the utility model connects the dust remover dust backflow pipeline and the sodium bicarbonate injection pipeline with the smoke channel, and uses the airflow of the smoke channel to send the newly added sodium bicarbonate or the sodium bicarbonate returned from the dust remover dust backflow pipeline into the desulfurizing tower, without setting a special blowing device, and the structure is simple. The electromagnetic valve on the dust remover dust backflow pipeline and the sodium bicarbonate injection pipeline is used to control the addition amount of the returned sodium bicarbonate and the injection amount of the new sodium bicarbonate, so as to reduce the amount of newly added sodium bicarbonate.

[0025] Since the dust remover dust backflow pipeline and the sodium bicarbonate injection pipeline are vertically arranged above the smoke channel, the material can enter the smoke channel under the action of gravity, which helps to save energy and reduce emissions. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the structure schematic view of the SDS sodium-based dry desulfurized ash circulating feed structure of the utility model;

[0027] Figure 2 It is the main sectional view of the flow guide pipeline in the SDS sodium-based dry desulfurized ash circulating feed structure of the utility model;

[0028] Figure 3 It is the SDS sodium-based dry desulfurized ash circulating feed structure in the utility model Figure 2 The enlarged view of A in the middle;

[0029] In the figure, 1 desulfurization tower, 2 flue dust channel, 3 dust collector dust backflow pipeline, 4 sodium bicarbonate injection pipeline, 5 electromagnetic valve, 6 dust collector, 7 flow guide module, 71 horizontal flow guide pipe, 72 vertical flow guide pipe, 73 flow guide plate, 74 screw rod, 75 driving motor, 76 screen mesh;

[0030] 711 first guide groove, 712 second guide groove, 731 sliding block, 8 connecting pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings.

[0032] As Figures 1-3 shown in the figure, a SDS sodium-based dry desulfurized ash recycling device, comprising a desulfurization tower 1, a flue dust channel 2, a dust collector dust backflow pipeline 3 and a sodium bicarbonate injection pipeline 4.

[0033] The flue dust channel 2 is connected with the inlet of the desulfurization tower 1. The boiler flue gas enters the desulfurization tower 1 through the flue gas pipeline 2 to carry out desulfurization.

[0034] The dust collector dust backflow pipeline 3 and the sodium bicarbonate injection pipeline 4 are both connected with the flue dust channel 2, and the dust collector dust backflow pipeline 3 and the sodium bicarbonate injection pipeline 4 are vertically arranged above the flue dust channel 2. In the flue gas flow process, the newly added sodium bicarbonate and the dust of the dust collector 6 are respectively injected into the flow guide pipeline 2 through the sodium bicarbonate injection pipeline 4 and the dust collector dust backflow pipeline 3.

[0035] The dust collector dust backflow pipeline 3 and the sodium bicarbonate injection pipeline 4 are respectively provided with an electromagnetic valve 5. The electromagnetic valve 5 controls the on-off of the dust collector dust backflow pipeline 3 and the sodium bicarbonate injection pipeline 4.

[0036] The SDS sodium-based dry desulfurized ash recycling device further comprises a dust collector 6, and the air inlet of the dust collector 6 is connected with the air outlet of the desulfurization tower 1 through a connecting pipe 8. The desulfurized gas enters the dust collector 6 to carry out dust removal through the connecting pipe 8.

[0037] The dust removal port of the dust collector 6 is connected with the dust collector dust backflow pipeline 3.

[0038] The SDS sodium-based dry desulfurized ash recycling device further comprises a flow guide module 7, and the flow guide module 7 comprises a horizontal flow guide pipe 71, a vertical flow guide pipe 72, a flow guide plate 73 and a driving module.

[0039] The horizontal flow guide pipe 71 is horizontally arranged on the upper end of the vertical flow guide pipe 72, the two ends of the horizontal flow guide pipe 71 are closed, and the vertical flow guide pipe 72 is connected with the flue dust channel 2.

[0040] The guide plate 73 is axially slidably arranged in the transverse guide pipe 71, and the driving module is used for controlling the sliding of the guide plate 73.

[0041] The guide plate 73 is in sealing connection with the inner wall of the transverse guide pipe 71, and the guide plate 73 is located above the inlet of the vertical guide pipe 72.

[0042] The dust return pipeline 3 and the sodium bicarbonate injection pipeline 4 are connected with the transverse guide pipe 71, and the discharge openings of the dust return pipeline 3 and the sodium bicarbonate injection pipeline 4 are respectively located on the two sides of the guide plate 73.

[0043] The driving module comprises a screw rod 74 rotatably arranged in the center of the transverse guide pipe 71 and a driving motor 75 connected with the screw rod 74.

[0044] The driving motor 75 is fixedly arranged outside the transverse guide pipe 71, and the screw rod 74 is in threaded connection with the guide plate 73.

[0045] In the embodiment, the pipe ends are connected through flanges, for example, the flanges are used to connect the smoke dust pipeline 2 and the desulfurization tower 1, the flanges are used to connect the connecting pipe and the desulfurization tower 1 and the dust collector 6, and the electromagnetic valve 5 is installed on the dust return pipeline 3 and the sodium bicarbonate injection pipeline 4 through threads.

[0046] The guide module 7 further comprises a screen 76, and the screen 76 is arranged at the lower end of the guide plate 73 and is in sliding fit with the transverse guide pipe 71.

[0047] The transverse guide pipe 71 is provided with a first guide groove 711, and the screen 76 is arranged in the first guide groove 711.

[0048] The side wall of the transverse guide pipe 71 is provided with an inspection door.

[0049] The transverse guide pipe 71 is provided with a second guide groove 712.

[0050] The upper end of the guide plate 73 is provided with a sliding block 731 matched with the second guide groove 712.

[0051] The working process of the utility model is as follows: the boiler flue gas enters the desulfurization tower 1 to be desulfurized through the flue gas pipeline, in the flue gas flowing process, the sodium bicarbonate is injected into the smoke dust pipeline 2 through the sodium bicarbonate injection pipeline 4 to be mixed with the flue gas, and the desulfurized gas enters the dust collector 6 to be dusted through the connecting pipe.

[0052] By adopting the above technical scheme, with the desulfurization, 30% of the unreacted sodium bicarbonate will gather on the dust bag of the dust collector 6, and then the dust collector 6 performs self-dust removal, and the unreacted sodium bicarbonate enters the dust collector dust return pipeline 3 through the ash discharge port, at this time the driving motor 75 drives the screw rod 74 to rotate, and then the flow guide plate 73 moves to the left under the action of the screw rod 74 and the sliding block 731, so that the discharging area of the screen mesh 76 located on the right side of the flow guide plate 73 gradually increases, and the discharging area of the screen mesh 76 located on the left side of the flow guide plate 73 gradually decreases, thereby reducing the amount of injected new sodium bicarbonate, saving raw materials, and improving the use effect of the return structure.

Claims

1. A SDS sodium-based dry desulfurized ash recycling device, characterized in that: It comprises a desulfurization tower (1), a smoke channel (2), a dust return pipeline (3) of a dust remover and a sodium bicarbonate injection pipeline (4); The smoke channel (2) is connected with the inlet of the desulfurization tower (1); The dust return pipeline (3) of the dust remover and the sodium bicarbonate injection pipeline (4) are both connected with the smoke channel (2), and the dust return pipeline (3) of the dust remover and the sodium bicarbonate injection pipeline (4) are vertically arranged above the smoke channel (2); The dust return pipeline (3) of the dust remover and the sodium bicarbonate injection pipeline (4) are respectively provided with electromagnetic valves (5).

2. The SDS sodium-based dry desulfurized fly ash recycling device according to claim 1, characterized in that: It further comprises a dust remover (6), and the air inlet of the dust remover (6) is connected with the air outlet of the desulfurization tower (1); The dust outlet of the dust remover (6) is connected with the dust return pipeline (3) of the dust remover.

3. The SDS sodium-based dry desulfurized fly ash recycling device according to claim 1, characterized in that: It further comprises a flow guide module (7), and the flow guide module (7) comprises a horizontal flow guide pipe (71), a vertical flow guide pipe (72), a flow guide plate (73) and a driving module; The horizontal flow guide pipe (71) is horizontally arranged at the upper end of the vertical flow guide pipe (72), and both ends of the horizontal flow guide pipe (71) are closed; the vertical flow guide pipe (72) is connected with the smoke channel (2); The flow guide plate (73) is arranged in the horizontal flow guide pipe (71) and can slide left and right along the horizontal flow guide pipe (71) in the axial direction; and the driving module is used for controlling the sliding of the flow guide plate (73); The flow guide plate (73) is in sealing connection with the inner wall of the horizontal flow guide pipe (71), and the flow guide plate (73) is located above the inlet of the vertical flow guide pipe (72); The dust return pipeline (3) of the dust remover and the sodium bicarbonate injection pipeline (4) are both connected with the horizontal flow guide pipe (71), and the discharge port of the dust return pipeline (3) of the dust remover and the discharge port of the sodium bicarbonate injection pipeline (4) are respectively located on the two sides of the flow guide plate (73).

4. The SDS sodium-based dry desulfurized fly ash recycling device according to claim 3, characterized in that: The driving module comprises a screw rod (74) rotatably arranged at the center of the horizontal flow guide pipe (71) and a driving motor (75) connected with the screw rod (74); The driving motor (75) is fixedly arranged outside the horizontal flow guide pipe (71), and the screw rod (74) is in threaded connection with the flow guide plate (73).

5. The SDS sodium-based dry desulfurized fly ash recycling device according to claim 4, characterized in that: The flow guide module (7) further comprises a screen (76), and the screen (76) is arranged at the lower end of the flow guide plate (73) and is in sliding cooperation with the horizontal flow guide pipe (71).

6. The SDS sodium-based dry desulfurized fly ash recycling device according to claim 5, characterized in that: A first guide groove (711) is arranged on the horizontal flow guide pipe (71), and the screen (76) is arranged in the first guide groove (711).

7. The SDS sodium-based dry desulfurized fly ash recycling device according to claim 5, characterized in that: A maintenance door is arranged on the side wall of the horizontal flow guide pipe (71).

8. The SDS sodium-based dry desulfurized fly ash recycling device according to claim 3, characterized in that: A second guide groove (712) is arranged on the horizontal flow guide pipe (71); A sliding block (731) matched with the second guide groove (712) is arranged at the upper end of the flow guide plate (73).

9. The SDS sodium-based dry desulfurized fly ash recycling device according to claim 2, characterized in that: A connecting pipe (8) is arranged between the air inlet of the dust remover (6) and the air outlet of the desulfurization tower (1).

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