Alkali slag treatment device and treatment method

Abstract

The present invention relates to the technical field of alkali residue treatment, and more particularly to an alkali residue treatment device and method, comprising a reaction tank having a cylindrical structure, wherein the axial direction of the reaction tank is parallel to the horizontal plane, an opening is provided on the side wall of the reaction tank, and a rotating unit is provided in the reaction tank. The rotating unit comprises multiple groups of scrapers rotating around the axis of the reaction tank, each group comprising multiple scrapers, the ends of the scrapers slidingly engaging with the inner wall of the reaction tank, and the rotating unit having a stirring mode and a slag removal mode. In the slag removal mode, the ends of adjacent scrapers in the same group are sequentially connected, the opening is opened, and the scrapers in the same group jointly form a receiving surface, which drives solid impurities remaining at the bottom of the reaction tank to the opening for discharge. The present invention reduces both manufacturing costs and later maintenance costs, while improving the effect of the reaction between the alkali residue and the acidic solvent, and reducing the amount of solid impurities in the reaction tube after the reaction.

Description

Technical Field

[0001] The present invention relates to the technical field of alkali residue treatment, and in particular to an alkali residue treatment device and a treatment method. Background Art

[0002] Currently, there are two main treatment methods for alkali residue wastewater: direct treatment and chemical treatment. Direct treatment methods include disposal, dilution, deep-well injection, and incineration, with incineration being the most common. Chemical treatment methods include neutralization and chemical oxidation, which are further categorized as air oxidation, wet oxidation, and catalytic oxidation, with air oxidation and wet oxidation being the most commonly used. While direct chemical oxidation of alkali residue wastewater can theoretically be performed using chemical oxidants (e.g., ozone, H₂O₂), the high cost of such methods has limited their practical application.

[0003] Chinese patent publication number CN220005371U discloses a comprehensive alkali residue treatment device, including an alkali residue pretreatment device and a static mixer. The alkali residue pretreatment device includes a sulfuric acid storage tank, an alkali residue storage tank, an automatic control valve, a pipeline mixer and an acidification sedimentation tank. One end of the pipeline mixer is fixedly connected to the sulfuric acid storage tank, and the other end of the pipeline mixer is fixedly connected to the alkali residue storage tank. The automatic control valve is arranged on the pipeline between the sulfuric acid storage tank and the pipeline mixer. The water outlet of the pipeline mixer is fixedly connected to the water inlet of the acidification sedimentation tank. The acidification sedimentation tank is fixedly connected to the reaction sedimentation tank through a pipeline. The upper right part of the reaction sedimentation tank is fixedly connected to an overflow port. The end of the reaction sedimentation tank away from the overflow port is fixedly connected to the crude phenol storage tank. A U-shaped tube is fixedly installed at the bottom of the reaction sedimentation tank. The end of the U-shaped tube away from the reaction sedimentation tank is fixedly connected to a wastewater buffer tank. The wastewater buffer tank is fixedly connected to an acidic water storage tank through a pipeline. A water pump is provided on the pipeline between the wastewater buffer tank and the acidic water storage tank. The top of the reaction sedimentation tank is connected to a waste gas treatment system.

[0004] The above scheme provides a new alkali slag treatment process, but it still needs to make the alkali slag and chemical agents mix with each other, and the mixed alkali slag will not be completely dissolved, but will produce new solid impurities. However, solid impurities will appear in both the acidification sedimentation tank and the reaction sedimentation tank. When the solid impurities are discharged, the solid impurities are usually discharged through a valve body provided at the bottom of the sedimentation tank. If the impurities accumulate too much, the valve body may be easily blocked by the solid impurities. Summary of the Invention

[0005] In view of the above problems, an alkali slag treatment device and method are provided. The reaction tank is arranged horizontally, and openings for feeding and discharging are opened on the side wall of the reaction tank. Compared with the traditional reaction tank that discharges solid impurities by setting a valve body at the bottom, the present invention does not experience valve body attenuation during use. Moreover, since no valve body is needed, both the manufacturing cost and the subsequent maintenance cost are reduced. At the same time, the rotating unit arranged in the reaction tank has a stirring mode and a slag removal mode. When the alkali slag and the acidic solvent are in a neutralization reaction state, the rotating unit is in a stirring mode. In the dynamic mode, there is a gap between each group of adjacent scrapers. When the scrapers stir the alkali slag, the alkali slag will not be scooped up by the scrapers, and the scrapers can sweep the bottom of the reaction tank when rotating. Compared with the traditional reaction tank, this avoids the situation where part of the alkali slag accumulates at the bottom of the reaction tank and cannot be stirred by the rotating unit, resulting in the alkali slag being unable to completely react with the acidic solvent. After the reaction is completed, the rotating unit switches to the slag removal mode. At this time, the ends of adjacent scrapers in each group are connected in sequence to form a receiving surface, which shovels the solid impurities in the reaction tank to the opening for discharge.

[0006] In order to solve the problems of the prior art, the present invention provides an alkali slag treatment device, including a reaction tank for chemically treating the alkali slag; the reaction tank is a cylindrical structure, and the axial direction of the reaction tank is parallel to the horizontal plane, an opening is provided on the side wall of the reaction tank, and a rotating unit is provided in the reaction tank, the rotating unit includes multiple groups of scrapers rotating around the axis of the reaction tank, each group includes multiple scrapers, and the ends of the scrapers are slidably matched with the inner wall of the reaction tank, and the rotating unit has a stirring mode and a slag removal mode. In the stirring mode, there is a gap between adjacent scrapers in the same group, and the opening is in a closed state. In the slag removal mode, the ends of adjacent scrapers in the same group are connected in sequence, the opening is opened, and the scrapers in the same group jointly form a receiving surface, which drives the solid impurities remaining at the bottom of the reaction tank to the opening for discharge.

[0007] Preferably, the scraper is provided with filter holes for the solvent to pass through.

[0008] Preferably, a sliding groove is provided at one end of the scraper facing the center of the reaction tank along the length direction of the scraper, and a rotating rod is slidably arranged in the sliding groove. The rotating rod can rotate around its own axis, and the scraper rotates synchronously with the rotating rod, and a spring is provided between the rotating rod and the bottom of the sliding groove along the extension direction of the rotating rod.

[0009] Preferably, a bracket is provided in the reaction tank to rotate around the axis of the reaction tank, and the rotating rod is provided on the bracket and rotates around the axis of the reaction tank synchronously with the bracket.

[0010] Preferably, a second gear is fixedly provided at the end of the rotating rod, and a rack is provided on one side of the second gear so as to be movable along the axial direction of the reaction tank, and the rack and the second gear are meshed with each other.

[0011] Preferably, a driving unit for driving the rack to move is provided at the end of the rack, and the driving unit drives the rack pneumatically.

[0012] Preferably, the driving unit includes a bellows arranged at the end of the rack and an inflatable sleeve connected to the bellows. The inflatable sleeve is an arc-shaped structure and the center of the inflatable sleeve coincides with the center of the reaction tank. An extrusion rod is slidably arranged in the inflatable sleeve. When the extrusion rod slides into the inflatable sleeve, the bellows extends, and when the extrusion rod slides out of the inflatable sleeve, the bellows shortens.

[0013] Preferably, a driving ring fixedly connected to the extrusion rod is rotatably provided on the end of the bracket along the axis of the reaction tank, a plurality of magnetic blocks are evenly fixedly provided on the driving ring around the axis of the driving ring, and a plurality of electromagnets that are energized in sequence are evenly provided on the bracket around the axis of the driving ring, and the electromagnets that are energized have a magnetic effect on the magnetic blocks.

[0014] Preferably, a rotating block is rotatably provided at the connection point between the inflatable sleeve and the bellows, and a connecting groove is provided on the rotating block. The inflatable sleeve is connected to the bellows through the connecting groove. When the rotating block rotates, the inflatable sleeve can be disconnected from the bellows.

[0015] The present invention also relates to a method for treating alkali residue, which uses an alkali residue treatment device, and the specific steps are as follows:

[0016] S1, putting the alkali residue into the reaction tank from the opening, and closing the opening, then injecting a certain amount of acidic solvent into the reaction tank, and the acidic solvent and the alkali residue begin to neutralize;

[0017] S2. The rotating unit starts to operate, and the scraper rotates around the axis of the reaction tank in the reaction tank. At this time, the acidic solvent and the alkaline residue are in a neutralization reaction. The rotating unit is in a stirring mode. The end of the scraper rotates in the reaction shell and slides with the inner wall of the reaction shell, and there is a gap between adjacent scrapers.

[0018] S3. After the reaction is completed, the rotating unit switches to the slag removal mode, and the adjacent scraper ends in the same group are connected in sequence to form a receiving surface. When the receiving surface rotates through the bottom of the reaction tank, the solvent can pass through the receiving surface smoothly, while the solid impurities cannot pass through the receiving surface. When the receiving surface rotates around the axis of the reaction tank, the solid impurities at the bottom of the reaction tank are picked up and discharged from the opening.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention arranges the reaction tank horizontally and opens openings for feeding and discharging on the side wall of the reaction tank. Compared with the traditional reaction tank that discharges solid impurities by setting a valve body at the bottom, the present invention does not experience valve body attenuation during use. Since no valve body is required, both the manufacturing cost and the cost of subsequent maintenance and repair are reduced. At the same time, the rotating unit arranged in the reaction tank has a stirring mode and a slag removal mode. When the alkali slag and the acidic solvent are in a neutralization reaction state, the rotating unit is in the stirring mode. At this time, there is a gap between each group of adjacent scrapers. When the scrapers stir the alkali slag, the alkali slag is not scooped up by the scrapers, and the scrapers can sweep the bottom of the reaction tank when rotating. Compared with the traditional reaction tank, this avoids the situation where part of the alkali slag accumulates at the bottom of the reaction tank and cannot be stirred by the rotating unit, resulting in the alkali slag not being able to react completely with the acidic solvent. After the reaction is completed, the rotating unit switches to the slag removal mode. At this time, the ends of the adjacent scrapers in each group are sequentially connected to form a receiving surface, and the receiving surface is used to shovel the solid impurities in the reaction tank to the opening for discharge. In summary, the present invention reduces both manufacturing costs and subsequent maintenance costs, while improving the effect of the reaction between alkaline residue and acidic solvent, and reducing the amount of solid impurities in the reaction tube after the reaction.

[0021] 2. The electromagnets are energized in sequence, so that the magnetic block is attracted and drives the driving ring to rotate, thereby causing the extrusion rod to slide in or out of the inflatable shell. When the extrusion rod slides into the inflatable shell, the bellows extends. One end of the bellows is fixed on the bracket. When the bellows extends or shortens, the rack can move along the axis of the reaction tank. By driving the rack to move, the first gear is driven to rotate by the rack, thereby realizing the switching of the scraper between the stirring mode and the slag removal mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of an alkali residue treatment device of the present invention.

[0023] Figure 2 It is a side view of an alkali slag treatment device of the present invention.

[0024] Figure 3 The present invention is a alkali residue treatment device Figure 2 Schematic cross-sectional view at AA in the middle.

[0025] Figure 4 It is a cutaway perspective schematic diagram of a rotating unit in an alkali slag treatment device of the present invention when it is in a slag removal mode.

[0026] Figure 5 The present invention is a alkali residue treatment device Figure 4 A partial enlarged schematic diagram of point B in the middle.

[0027] Figure 6 The present invention is a alkali residue treatment device Figure 4 A partial enlarged schematic diagram of point C in the middle.

[0028] Figure 7 It is a three-dimensional schematic diagram of a rotating unit of an alkali residue treatment device of the present invention when it is in a stirring mode.

[0029] Figure 8 It is a three-dimensional schematic diagram of an alkali residue treatment device of the present invention when the opening of the reaction tank is open.

[0030] Figure 9 It is a cutaway perspective schematic diagram of a reaction tank in an alkali residue treatment device of the present invention when the opening is open.

[0031] Figure 10 The present invention is a alkali residue treatment device Figure 9 A local enlarged schematic diagram of point D in the middle.

[0032] Figure 11 It is a three-dimensional schematic diagram of an alkali slag treatment device of the present invention, in which a rotating unit is in a slag removal mode and a reaction tank is removed.

[0033] Figure 12 The present invention is a alkali residue treatment device Figure 11 A partial enlarged schematic diagram of point E in the middle.

[0034] The numbers in the figure are:

[0035] 1. Reactor; 11. Opening; 2. Rotating unit; 21. Scraper; 211. Filter hole; 212. Sliding groove; 22. Rotating rod; 221. Second gear; 222. Rack; 223. Drive unit; 2231. Bellows; 2232. Inflatable sleeve; 2233. Extrusion rod; 2234. Drive ring; 2235. Electromagnet; 2236. Magnetic block; 224. Rotating block; 225. Connecting groove; 226. Servo; 23. Spring; 24. Bracket; 25. Rotary driver; 26. Gear ring; 27. First gear. DETAILED DESCRIPTION

[0036] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figures 1-4 and Figure 8: A alkali slag treatment device includes a reaction tank 1 for chemically treating alkali slag; the reaction tank 1 is a cylindrical structure, and the axial direction of the reaction tank 1 is parallel to the horizontal plane, an opening 11 is provided on the side wall of the reaction tank 1, and a rotating unit 2 is provided in the reaction tank 1, the rotating unit 2 includes multiple groups of scrapers 21 rotating around the axis of the reaction tank 1, each group includes multiple scrapers 21, and the ends of the scrapers 21 slide with the inner wall of the reaction tank 1, and the rotating unit 2 has a stirring mode and a slag removal mode. In the stirring mode, there is a gap between adjacent scrapers 21 in the same group, and the opening 11 is in a closed state. In the slag removal mode, the ends of adjacent scrapers 21 in the same group are connected in sequence, and the opening 11 is opened. The scrapers 21 in the same group jointly form a receiving surface, and the receiving surface drives the solid impurities remaining at the bottom of the reaction tank 1 to the opening 11 for discharge.

[0038] In the process of treating alkali residue, there are many existing treatment methods, among which the most common one is the neutralization method, that is, the pH value of the alkali residue is adjusted by neutralizing the alkali residue with an acidic solvent, and then the alkali residue is sent to the sewage treatment plant for biochemical treatment. In the process of adjusting the pH value of the alkali residue, the alkali residue needs to be put into the reaction tank 1 first. The existing reaction tank 1 is set in a vertical state. Then, the acidic solvent is put into the reaction tank 1 so that the acidic solvent and the alkali residue undergo a neutralization reaction. During the reaction, the temperature in the reaction tank 1 will rise, and new impurities will be generated at the bottom of the reaction tank 1. Due to the structural characteristics of the reaction tank 1, the solid impurities remaining in the reaction tank 1 are not easy to be discharged. In order to facilitate the discharge of the solid impurities remaining in the reaction tank 1, most of the existing reaction tanks 1 are provided with a valve body for discharging the solid impurities at the bottom. When the alkali residue in the reaction tank 1 reacts chemically with the acidic solvent, the valve body is in a closed state. When the reaction is completed, the solvent after the reaction is discharged first, and then the valve body is opened to discharge the solid impurities at the bottom of the reaction tank 1 through the opened valve body. However, the above treatment method has the following disadvantages: first, when the alkaline residue in the reaction tank 1 reacts with the acidic solvent, it is easy to corrode the valve body arranged at the bottom of the reaction tank 1, resulting in a reduction in the service life of the valve body. As the use time increases, the acidic solvent in the reaction tank 1 will leak when reacting with the alkaline residue; second, in order to facilitate the smooth discharge of solid impurities in the reaction tank 1, it is necessary to leave some solvent in the reaction tank 1 to flush out the solid impurities. Even so, there are still a lot of solid impurities remaining in the reaction tank 1, resulting in the solid impurities remaining in the reaction tank 1 affecting the reaction in the subsequent reaction process. The normal reaction in tank 1 causes the rate at which the acidic solvent reacts with the alkaline slag to decrease, and since the discharged solid impurities are mixed with the solvent, the solid impurities and the solvent need to be filtered and separated before the solid impurities are discharged, which involves many steps and has low efficiency. Thirdly, since a valve body is provided at the bottom of the reaction tank 1, and a rotating unit 2 that can increase the reaction rate is also provided in the reaction tank 1, the traditional rotating unit 2 cannot stir the alkaline slag accumulated on the upper part of the valve body, resulting in that after each reaction is completed, part of the alkaline slag near the valve body has not been completely neutralized, and a large amount of solid impurities accumulated on the upper part of the valve body will also agglomerate, making it difficult to discharge the solid impurities when the valve body is opened.

[0039] In order to avoid the above situation, the structure of the existing alkali residue treatment device is redesigned so that the rotating unit 2 can not only stir the reaction tank 1, but also be used to discharge solid impurities at the bottom of the reaction tank 1. The valve body provided at the bottom of the reaction tank 1 for discharging solid impurities is eliminated, thereby avoiding leakage of the valve body after long-term use. The specific structure and working process of the alkali residue treatment device of the present invention are as follows:

[0040] When in use, a certain amount of alkali residue is first put into the reaction tank 1 through the opening 11, and then the opening 11 is closed. This is because alkali residue and acidic solvent will produce toxic gas when reacting, and closing the opening 11 can prevent the toxic gas from overflowing. An injection port for adding acidic solvent is provided on the side wall of the reaction tank 1. After the alkali slag is put into the reaction tank 1 and the opening 11 is closed, a predetermined amount of acidic solvent is added to the reaction tank 1 through the injection port. The upper liquid level of the added acidic solvent cannot exceed the opening 11. At the same time, the rotating unit 2 starts to operate, and the multiple groups of scrapers 21 in the rotating unit 2 start to rotate around the axis of the reaction tank 1. At this time, the rotating unit 2 is in a stirring mode. There is a gap between adjacent scrapers 21 in each group, and the end of the scraper 21 contacts the inner wall of the reaction tank 1. When the scraper 21 rotates around the axis of the reaction tank 1 and passes through the bottom of the reaction tank 1, the end of the scraper 21 scrapes the bottom of the reaction tank 1. Although there is a certain scraping blind area between the end of the scraper 21 and the inner wall of the reaction tube in the stirring mode, due to the small scraping blind area, solid impurities are difficult to form accumulation and agglomeration in the scraping blind area. At the same time, compared with the traditional stirring method, the reactor 1 in the present invention is in a horizontal setting state, so that the scraper 21 in the rotating unit 2 can completely touch the bottom of the reactor 1 when rotating, thereby improving the stirring effect and avoiding the situation where some alkali slag accumulated at the bottom of the reactor 1 cannot be stirred and cannot react completely. After the reaction is completed, the rotating unit 2 switches from the stirring mode to the slag removal mode. At this time, the ends of the adjacent scrapers 21 in the same group are connected in sequence and form a receiving surface. When the receiving surface rotates around the axis of the reactor 1, there is no cleaning blind spot on the receiving surface. This is because the length direction of the receiving surface is parallel to the axial direction of the reactor 1. When the receiving surface rotates, the solid impurities at the bottom of the reactor 1 will be shoveled up by the receiving surface towards one end of the inner wall of the reactor 1, and the solvent after the reaction can pass through the receiving surface. When the receiving surface rotates to the side of the opening 11, the solvent on the receiving surface can be filtered out, and the solid impurities remaining on the receiving surface can be discharged smoothly from the opening 11.

[0041] By setting the reaction tank 1 horizontally and openings 11 for feeding and discharging materials on the side wall of the reaction tank 1, compared with the traditional reaction tank 1 that discharges solid impurities by setting a valve body at the bottom, the present invention will not cause the valve body to attenuate during use, and since no valve body is needed, both the manufacturing cost and the cost of subsequent maintenance and repair are reduced. At the same time, the rotating unit 2 set in the reaction tank 1 has a stirring mode and a slag removal mode. When the alkali slag and the acidic solvent are in a neutralization reaction state, the rotating unit 2 is in the stirring mode. At this time, each group of adjacent scrapers 21 There is a gap between them, and when the scraper 21 stirs the alkali slag, the alkali slag will not be scooped up by the scraper 21, and the scraper 21 can sweep the bottom of the reaction tank 1 when rotating. Compared with the traditional reaction tank 1, it avoids the situation where the alkali slag cannot completely react with the acidic solvent due to part of the alkali slag accumulating at the bottom of the reaction tank 1 and cannot be stirred. After the reaction is completed, the rotating unit 2 switches to the slag removal mode. At this time, the ends of the adjacent scrapers 21 in each group are connected in sequence and form a receiving surface, and the solid impurities in the reaction tank 1 are shoveled to the opening 11 through the receiving surface for discharge. In summary, the present invention reduces both manufacturing costs and later maintenance costs, while improving the effect of the alkali slag and the acidic solvent during the reaction, and also reduces the stock of solid impurities in the reaction tank 1 after the reaction.

[0042] Reference Figure 6 : A filter hole 211 is provided on the scraper 21 for the solvent to pass through.

[0043] When the rotating unit 2 is in the slag removal mode, the ends of the adjacent scrapers 21 in each group are connected in sequence to form a receiving surface. If the scraper 21 does not have a filter hole 211, when the receiving surface removes the solid impurities at the bottom of the reaction tank 1, part of the reacted solvent will also be driven by the receiving surface to the opening 11 for discharge, resulting in the solid impurities discharged from the opening 11 still needing to be separated from the liquid, which adds unnecessary steps. After the filter hole 211 is opened on the scraper 21, the solvent can pass through the filter hole 211 when the receiving surface rotates, which reduces the process settings and improves the processing efficiency.

[0044] Reference Figure 6 : A sliding groove 212 is provided at one end of the scraper 21 facing the center of the reaction tank 1 along the length direction of the scraper 21, and a rotating rod 22 is slidably provided in the sliding groove 212. The rotating rod 22 can rotate around its own axis, and the scraper 21 rotates synchronously with the rotating rod 22. A spring 23 is provided between the rotating rod 22 and the bottom of the sliding groove 212 along the extension direction of the rotating rod 22.

[0045] The two ends of the spring 23 are fixedly connected to the bottom of the sliding groove 212 and the end of the rotating rod 22, respectively. When the rotating unit 2 is started, the rotating rod 22 and its corresponding scraper 21 rotate synchronously around the axis of the reaction tank 1 within the reaction tank 1. The rotating rod 22 rotates around its own axis to switch the scraper 21 between the stirring mode and the slag removal mode. The spring 23 set in the sliding groove 212 is always in a compressed state, ensuring that the end of the scraper 21 can always contact the inner wall of the reaction tank 1, avoiding the situation in which the scraper 21 cannot maintain stable contact with the inner wall of the reaction tank 1 in the slag removal mode, resulting in the inability to smoothly pick up solid impurities.

[0046] Reference Figure 1 、 Figure 7 and Figure 8 A bracket 24 is provided in the reaction tank 1 to rotate around the axis of the reaction tank 1 , and a rotating rod 22 is provided on the bracket 24 and rotates around the axis of the reaction tank 1 synchronously with the bracket 24 .

[0047] One end of the bracket 24 extends from the end of the reaction tank 1, and a gear ring 26 is fixedly provided on the end of the bracket 24. The axis of the gear ring 26 is collinear with the axis of the reaction tank 1. A first gear 27 is rotatably engaged on one side of the gear ring 26. A rotary driver 25 for driving the first gear 27 to rotate is provided at the end of the first gear 27. The rotary driver 25 is preferably a servo motor.

[0048] Reference Figure 5 and Figure 9 A second gear 221 is fixedly provided at the end of the rotating rod 22 , and a rack 222 is provided on one side of the second gear 221 so as to move along the axial direction of the reaction tank 1 , and the rack 222 and the second gear 221 are meshed with each other.

[0049] Reference Figure 9 : A driving unit 223 for driving the rack 222 to move is provided at the end of the rack 222, and the driving unit 223 drives the rack 222 pneumatically.

[0050] Reference Figure 10-12 : The driving unit 223 includes a bellows 2231 arranged at the end of the rack 222 and an inflatable sleeve 2232 connected to the bellows 2231. The inflatable sleeve 2232 is an arc-shaped structure and the center of the inflatable sleeve 2232 coincides with the center of the reaction tank 1. An extrusion rod 2233 is slidably arranged in the inflatable sleeve 2232. When the extrusion rod 2233 slides into the inflatable sleeve 2232, the bellows 2231 extends. When the extrusion rod 2233 slides out of the inflatable sleeve 2232, the bellows 2231 shortens.

[0051] Reference Figure 12: A driving ring 2234 fixedly connected to the extrusion rod 2233 is rotatably provided on the end of the bracket 24 along the axis of the reaction tank 1, and a plurality of magnetic blocks 2236 are evenly fixedly provided on the driving ring 2234 around the axis of the driving ring 2234. A plurality of electromagnets 2235 that are energized in sequence are evenly provided on the bracket 24 around the axis of the driving ring 2234. After being energized, the electromagnets 2235 have a magnetic effect on the magnetic blocks 2236.

[0052] The electromagnets 2235 are energized in sequence, so that the magnetic block 2236 is attracted and drives the driving ring 2234 to rotate, thereby causing the extrusion rod 2233 to slide in or out of the inflatable shell. When the extrusion rod 2233 slides into the inflatable shell, the bellows 2231 extends, and one end of the bellows 2231 is fixedly set on the bracket 24. When the bellows 2231 extends or shortens, the rack 222 can move along the axis of the reaction tank 1. By driving the rack 222 to move, the first gear 27 is driven to rotate by the rack 222, thereby realizing the switching of the scraper 21 between the stirring mode and the slag removal mode.

[0053] Reference Figure 12 : A rotating block 224 is rotatably provided at the connection point between the inflatable sleeve 2232 and the bellows 2231. A connecting groove 225 is provided on the rotating block 224. The inflatable sleeve 2232 is connected to the bellows 2231 through the connecting groove 225. When the rotating block 224 rotates, the inflatable sleeve 2232 can be disconnected from the bellows 2231.

[0054] A servo 226 for driving the rotating block 224 to rotate is provided at the end of the rotating block 224. Whenever the rotating unit 2 completes the mode switching, the servo 226 drives the rotating block 224 to rotate, so that the inflatable sleeve 2232 is disconnected from the bellows 2231, thereby realizing the air lock of the bellows 2231 and avoiding the scraper 21 from resetting after rotation.

[0055] Reference Figures 1-12 The present invention also relates to a method for treating alkali residue, which uses an alkali residue treatment device, and the specific steps are as follows:

[0056] S1, putting the alkali residue into the reaction tank 1 through the opening 11, and closing the opening 11, then injecting a certain amount of acidic solvent into the reaction tank 1, and the acidic solvent and the alkali residue begin to neutralize;

[0057] S2, the rotating unit 2 starts to operate, and the scraper 21 rotates around the axis of the reaction tank 1 in the reaction tank 1. At this time, the acidic solvent and the alkaline residue are in a neutralization reaction. The rotating unit 2 is in a stirring mode. The end of the scraper 21 rotates in the reaction shell and slides with the inner wall of the reaction shell, and there is a gap between adjacent scrapers 21;

[0058] S3. After the reaction is completed, the rotating unit 2 switches to the slag removal mode, and the ends of the adjacent scrapers 21 in the same group are connected in sequence to form a receiving surface. When the receiving surface rotates through the bottom of the reaction tank 1, the solvent can pass through the receiving surface smoothly, while the solid impurities cannot pass through the receiving surface. When the receiving surface rotates around the axis of the reaction tank 1, the solid impurities at the bottom of the reaction tank 1 are picked up and discharged from the opening 11.

[0059] Working principle: When in use, first put a certain amount of alkali residue into the reaction tank 1 from the opening 11, and then close the opening 11. This is because the alkali residue and the acidic solvent will produce toxic gas when reacting, and closing the opening 11 can prevent the toxic gas from overflowing. An injection port for adding acidic solvent is provided on the side wall of the reaction tank 1. After the alkali slag is put into the reaction tank 1 and the opening 11 is closed, a predetermined amount of acidic solvent is added to the reaction tank 1 through the injection port. The upper liquid level of the added acidic solvent cannot exceed the opening 11. At the same time, the rotating unit 2 starts to operate, and the multiple groups of scrapers 21 in the rotating unit 2 start to rotate around the axis of the reaction tank 1. At this time, the rotating unit 2 is in a stirring mode. There is a gap between adjacent scrapers 21 in each group, and the end of the scraper 21 contacts the inner wall of the reaction tank 1. When the scraper 21 rotates around the axis of the reaction tank 1 and passes through the bottom of the reaction tank 1, the end of the scraper 21 scrapes the bottom of the reaction tank 1. Although there is a certain scraping blind area between the end of the scraper 21 and the inner wall of the reaction tube in the stirring mode, due to the small scraping blind area, solid impurities are difficult to form accumulation and agglomeration in the scraping blind area. At the same time, compared with the traditional stirring method, the reactor 1 in the present invention is in a horizontal setting state, so that the scraper 21 in the rotating unit 2 can completely touch the bottom of the reactor 1 when rotating, thereby improving the stirring effect and avoiding the situation where some alkali slag accumulated at the bottom of the reactor 1 cannot be stirred and cannot react completely. After the reaction is completed, the rotating unit 2 switches from the stirring mode to the slag removal mode. At this time, the ends of the adjacent scrapers 21 in the same group are connected in sequence and form a receiving surface. When the receiving surface rotates around the axis of the reactor 1, there is no cleaning blind spot on the receiving surface. This is because the length direction of the receiving surface is parallel to the axial direction of the reactor 1. When the receiving surface rotates, the solid impurities at the bottom of the reactor 1 will be shoveled up by the receiving surface towards one end of the inner wall of the reactor 1, and the solvent after the reaction can pass through the receiving surface. When the receiving surface rotates to the side of the opening 11, the solvent on the receiving surface can be filtered out and the solid impurities remaining on the receiving surface can be discharged smoothly from the opening 11.

[0060] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the appended claims.

Claims

1. A caustic residue treatment device, comprising a reaction tank (1) for chemically treating the caustic residue; It is characterized by: The reaction tank (1) is a cylindrical structure, and the axis direction of the reaction tank (1) is parallel to the horizontal plane. An opening (11) is provided on the side wall of the reaction tank (1). A rotating unit (2) is provided in the reaction tank (1). The rotating unit (2) includes multiple groups of scrapers (21) rotating around the axis of the reaction tank (1). Each group includes multiple scrapers (21). The ends of the scrapers (21) are slidably matched with the inner wall of the reaction tank (1). The rotating unit (2) has a stirring mode and a slag removal mode. In the stirring mode, there is a gap between adjacent scrapers (21) in the same group, and the opening (11) is in a closed state. In the slag removal mode, the ends of adjacent scrapers (21) in the same group are connected in sequence, and the opening (11) is opened. The scrapers (21) in the same group jointly form a receiving surface, and the receiving surface drives solid impurities remaining at the bottom of the reaction tank (1) to the opening (11) for discharge. A sliding groove (212) is provided at one end of the scraper (21) facing the center of the reaction tank (1) along the length direction of the scraper (21). A rotating rod (22) is slidably provided in the sliding groove (212). The rotating rod (22) can rotate around its own axis, and the scraper (21) rotates synchronously with the rotating rod (22). A spring (23) is provided between the rotating rod (22) and the bottom of the sliding groove (212) along the extension direction of the rotating rod (22). A bracket (24) is provided in the reaction tank (1) to rotate around the axis of the reaction tank (1), a rotating rod (22) is provided on the bracket (24) and rotates around the axis of the reaction tank (1) synchronously with the bracket (24), a second gear (221) is fixedly provided at the end of the rotating rod (22), a rack (222) is provided on one side of the second gear (221) to move along the axis of the reaction tank (1), the rack (222) and the second gear (221) are meshed with each other, a driving unit (223) for driving the rack (222) to move is provided at the end of the rack (222), and the driving unit (223) drives the rack (222) pneumatically; The driving unit (223) comprises a bellows (2231) arranged at the end of the rack (222) and an inflatable sleeve (2232) connected to the bellows (2231); the inflatable sleeve (2232) is an arc-shaped structure, and the center of the inflatable sleeve (2232) coincides with the center of the reaction tank (1); an extrusion rod (2233) is slidably arranged in the inflatable sleeve (2232); when the extrusion rod (2233) slides into the inflatable sleeve (2232), the bellows (2231) extends; when the extrusion rod (2233) slides out of the inflatable sleeve (2232), the bellows (2231) shortens; A driving ring (2234) fixedly connected to the extrusion rod (2233) is rotatably provided on the end of the bracket (24) along the axis of the reaction tank (1); a plurality of magnetic blocks (2236) are evenly and fixedly provided on the driving ring (2234) around the axis of the driving ring (2234); a plurality of electromagnets (2235) energized in sequence are evenly provided on the bracket (24) around the axis of the driving ring (2234); the electromagnets (2235) energized have a magnetic attraction effect on the magnetic blocks (2236).

2. The alkali residue treatment device according to claim 1, characterized in that: The scraper (21) is provided with a filter hole (211) for the solvent to pass through.

3. The alkali residue treatment device according to claim 1, characterized in that: A rotating block (224) is rotatably provided at the connection point between the inflatable sleeve (2232) and the bellows (2231). A connecting groove (225) is provided on the rotating block (224). The inflatable sleeve (2232) is connected to the bellows (2231) via the connecting groove (225). When the rotating block (224) rotates, the inflatable sleeve (2232) can be disconnected from the bellows (2231).

4. A method for treating alkali residue, using an alkali residue treating device according to any one of claims 1 to 3, characterized in that: The specific steps are as follows: S1, putting the alkali residue into the reaction tank (1) through the opening (11), and closing the opening (11), and then injecting a fixed amount of acidic solvent into the reaction tank (1), and the acidic solvent and the alkali residue begin to neutralize; S2, the rotating unit (2) starts to operate, and the scraper (21) rotates in the reaction tank (1) around the axis of the reaction tank (1). At this time, the acidic solvent and the alkaline residue are in a neutralization reaction, and the rotating unit (2) is in a stirring mode. The end of the scraper (21) rotates in the reaction shell and slides with the inner wall of the reaction shell, and there is a gap between adjacent scrapers (21); S3. After the reaction is completed, the rotating unit (2) switches to the slag removal mode, and the ends of the adjacent scrapers (21) in the same group are connected in sequence to form a receiving surface. When the receiving surface rotates through the bottom of the reaction tank (1), the volume can pass through the receiving surface smoothly, while the solid impurities cannot pass through the receiving surface. When the receiving surface rotates around the axis of the reaction tank (1), the solid impurities at the bottom of the reaction tank (1) are picked up and discharged from the opening (11).

Images