Alkali residue treatment device and treatment method

Abstract

The invention relates to the technical field of alkaline residue treatment, in particular to an alkaline residue treatment device and method.The alkaline residue treatment device comprises a reaction tank, the reaction tank is of a cylindrical structure, the axis direction of the reaction tank is parallel to the horizontal plane, an opening is formed in the side wall of the reaction tank, and a rotating unit is arranged in the reaction tank; the rotating unit comprises a plurality of groups of scrapers rotating around the axis of the reaction tank, each group comprises a plurality of scrapers, the end parts of the scrapers are in sliding fit with the inner wall of the reaction tank, the rotating unit has a stirring mode and a deslagging mode, in the deslagging mode, the end parts of the adjacent scrapers in the same group are sequentially connected, the openings are opened, and the scrapers in the same group jointly form a bearing surface; and the bearing surface drives solid impurities remained at the bottom of the reaction tank to the opening to be discharged. According to the invention, the manufacturing cost is reduced, the later maintenance cost is reduced, the reaction effect of the alkaline residues and the acid solvent is improved, and the stock of solid impurities in the reaction tube after the reaction is also reduced.

Description

Technical Field

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

[0002] At present, there are two methods for treating alkali residue wastewater: direct treatment and chemical treatment. Direct treatment methods include sale, dilution, deep well injection and incineration, among which incineration is the main method; chemical treatment methods include neutralization and chemical oxidation, among which chemical oxidation is further divided into air oxidation, wet oxidation and catalytic oxidation, among which air oxidation and wet oxidation are more widely used. In theory, chemical oxidants (ozone, H2O2 reagents, etc.) can also be used for direct chemical oxidation of alkali residue wastewater, but due to the high cost of such methods, their actual promotion and application are limited.

[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 arranged 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 is still necessary to mix the alkali slag with the chemical agent, 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 settling tank and the reaction settling tank. When the solid impurities are discharged, the solid impurities are usually discharged through a valve body arranged at the bottom of the settling tank. If the impurities accumulate too much, the solid impurities may easily block the valve body. Summary of the invention

[0005] In view of the above problems, an alkali slag treatment device and a treatment method are provided. The reaction tank is horizontally arranged, 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 arranging a valve body at the bottom, the present invention will not cause valve body attenuation during use, and since no valve body is needed, both the manufacturing cost and the later 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 rotating 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 turn to form a receiving surface, and the solid impurities in the reaction tank are shoveled to the opening through the receiving surface 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 opened on the side wall of the reaction tank, and a rotating unit is arranged 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, and the receiving surface 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, 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 arranged between the rotating rod and the bottom of the sliding groove along the extension direction of the rotating rod.

[0009] Preferably, a bracket is arranged in the reaction tank to rotate around the axis of the reaction tank, and the rotating rod is arranged 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 movably provided on one side of the second gear along the axial direction of the reaction tank, and the rack is meshed with the second gear.

[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 arranged on the end of the bracket along the axis of the reaction tank, a plurality of magnetic blocks are evenly and fixedly arranged on the driving ring around the axis of the driving ring, and a plurality of electromagnets that are energized in sequence are evenly arranged on the bracket around the axis of the driving ring, and the electromagnets that are energized have a magnetic attraction 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 with 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 residues, which uses an alkali residue treatment device, and the specific steps are as follows: S1, putting the alkali residue into the reaction tank from the opening, and closing the opening, then injecting a quantitative acid solvent into the reaction tank, and the acid solvent and the alkali residue begin to react with each other; 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, and 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; 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.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 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 arranging a valve body at the bottom, the present invention does not have the situation of valve body attenuation during use, and since there is no need to use a valve body, both the manufacturing cost and the cost of later 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 scraper stirs the alkali slag, the alkali slag will not be shoveled up by the scraper, and the scraper can sweep the bottom of the reaction tank when rotating. Compared with the traditional reaction tank, the situation that the alkali slag cannot completely react with the acidic solvent due to the accumulation of part of the alkali slag at the bottom of the reaction tank and cannot be stirred by the rotating unit is avoided. After the reaction is completed, the rotating unit is switched 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 solid impurities in the reaction tank are shoveled to the opening for discharge through the receiving surface. In summary, the present invention reduces both manufacturing costs and subsequent maintenance costs, while improving the effect of the reaction between alkaline slag and acidic solvents and reducing the amount of solid impurities in the reaction tube after the reaction.

[0017] 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 into or out of the air-filled shell. When the extrusion rod slides into the air-filled shell, the bellows extends, and 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, and the rack is driven to move, so that 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

[0018] Figure 1 It is a three-dimensional schematic diagram of an alkali slag treatment device of the present invention.

[0019] Figure 2 It is a side view of a alkali slag treatment device of the present invention.

[0020] Figure 3 The present invention is a alkali slag treatment device Figure 2 Schematic cross-sectional view at AA in the middle.

[0021] Figure 4 It is a cutaway stereoscopic schematic diagram of a rotating unit in an alkali slag treatment device of the present invention when it is in a slag removal mode.

[0022] Figure 5 The present invention is a alkali slag treatment device Figure 4 A local enlarged schematic diagram of point B in the middle.

[0023] Figure 6 The present invention is a alkali slag treatment device Figure 4 A partial enlarged schematic diagram of point C in the middle.

[0024] Figure 7 It is a three-dimensional schematic diagram of a rotating unit of an alkali slag treatment device of the present invention when it is in a stirring mode.

[0025] Figure 8 It is a three-dimensional schematic diagram of a reaction tank in an alkali slag treatment device of the present invention when the opening is open.

[0026] Fig. 9 It is a cutaway stereoscopic schematic diagram of a reaction tank in an alkali slag treatment device of the present invention when the opening is open.

[0027] Fig.10 The present invention is a alkali slag treatment device Fig. 9 A partial enlarged schematic diagram of point D in the middle.

[0028] Fig.11 It is a three-dimensional schematic diagram of a rotating unit in an alkali slag treatment device of the present invention being in a slag removal mode with a reaction tank removed.

[0029] Fig.12 The present invention is a alkali slag treatment device Fig.11 A partial enlarged schematic diagram of point E in the middle.

[0030] The numbers in the figure are: 1. reaction tank; 11. opening; 2. rotating unit; 21. scraper; 211. filter hole; 212. sliding groove; 22. rotating rod; 221. second gear; 222. rack; 223. driving unit; 2231. bellows; 2232. inflatable sleeve; 2233. extrusion rod; 2234. driving 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

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference Figure 1-Figure 4 and Figure 8A device for treating alkaline slag comprises a reaction tank 1 for chemically treating alkaline 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, a rotating unit 2 is arranged in the reaction tank 1, the rotating unit 2 comprises a plurality of groups of scrapers 21 rotating around the axis of the reaction tank 1, each group comprises a plurality of 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, the opening 11 is opened, and 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.

[0033] 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 neutralization reaction between the acidic solvent and the alkali residue, 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 arranged in a vertical state, and 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 retained in the reaction tank 1 are not easy to be discharged. In order to facilitate the discharge of the solid impurities retained 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, and the solid impurities at the bottom of the reaction tank 1 are discharged 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 acidic solvent to react with the alkaline slag at a lower rate, and since the discharged solid impurities are mixed with the solvent, it is necessary to filter and separate the solid impurities from the solvent before the solid impurities are discharged, which involves many steps and has a low efficiency. Thirdly, since a valve body is provided at the bottom of the reaction tank 1 and a rotating unit 2 is also provided in the reaction tank 1 for increasing the reaction rate, 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, resulting in difficulty in discharging the solid impurities when the valve body is opened.

[0034] 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 the solid impurities at the bottom of the reaction tank 1, and the valve body for discharging solid impurities at the bottom of the reaction tank 1 is cancelled, so as to avoid the 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: When in use, a certain amount of alkali residue is first put into the reaction tank 1 from the opening 11, and then the opening 11 is closed. This is because toxic gas will be generated when the alkali residue reacts with the acidic solvent, and closing the opening 11 can prevent the toxic gas from overflowing. An injection port for adding an 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 run, 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 from the bottom of the reaction tank 1 around the axis 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, it is difficult for solid impurities 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 that the alkali slag partially 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 which time the ends of the adjacent scrapers 21 in the same group are successively connected and form a receiving surface, and when the receiving surface rotates around the axis of the reactor 1, there is no cleaning blind spot on the receiving surface, because the length direction of the receiving surface is parallel to the axis direction of the reactor 1, and when the receiving surface rotates, the solid impurities at the bottom of the reactor 1 will be shoveled up by the receiving surface toward one end of the inner wall of the reactor 1, and the reacted solvent can pass through the receiving surface, and 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.

[0035] By setting the reaction tank 1 horizontally and opening 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 decay during use, and since no valve body is needed, both the manufacturing cost and the later maintenance cost are reduced. At the same time, the rotating unit 2 arranged in the reaction tank 1 has a stirring mode and a slag removal mode. When the alkaline 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. When the scraper 21 stirs the alkali residue, the alkali residue 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 that the alkali residue cannot completely react with the acidic solvent due to the accumulation of part of the alkali residue 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 the manufacturing cost and the later maintenance cost, while improving the effect of the alkali residue and the acidic solvent during the reaction, and also reduces the stock of solid impurities in the reaction tank 1 after the reaction.

[0036] Reference Figure 6 : A filter hole 211 is provided on the scraper 21 for the solvent to pass through.

[0037] 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 is not provided with 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 processes. After the filter hole 211 is provided 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.

[0038] 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.

[0039] 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 in 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 stably contact the inner wall of the reaction tank 1 in the slag removal mode, resulting in the inability to smoothly pick up solid impurities.

[0040] 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 .

[0041] 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 colinear with the axis of the reaction tank 1. A first gear 27 is rotatably engaged on one side of the gear ring 26, and a rotation driver 25 for driving the first gear 27 to rotate is provided at the end of the first gear 27. The rotation driver 25 is preferably a servo motor.

[0042] Reference Figure 5 and Fig. 9 A second gear 221 is fixedly provided at the end of the rotating rod 22 , and a rack 222 is movably provided on one side of the second gear 221 along the axial direction of the reaction tank 1 , and the rack 222 and the second gear 221 are meshed with each other.

[0043] Reference Fig. 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.

[0044] 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.

[0045] Reference Fig.12A driving ring 2234 fixedly connected to the extrusion rod 2233 is rotatably arranged 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 arranged on the driving ring 2234 around the axis of the driving ring 2234, a plurality of electromagnets 2235 energized in sequence are evenly arranged on the bracket 24 around the axis of the driving ring 2234, and the electromagnets 2235 after energization have a magnetic attraction effect on the magnetic blocks 2236.

[0046] 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 into or out of the inflation shell. When the extrusion rod 2233 slides into the inflation shell, the bellows 2231 is extended, and one end of the bellows 2231 is fixed on the bracket 24. When the bellows 2231 is extended or shortened, 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.

[0047] Reference Fig.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.

[0048] A servo 226 for driving the rotatable block 224 to rotate is provided at the end of the rotatable block 224. Whenever the rotatable unit 2 completes the mode switching, the servo 226 drives the rotatable 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.

[0049] Reference Figure 1-Figure 12 The present invention also relates to a method for treating alkali residues, which uses an alkali residue treatment device, and the specific steps are as follows: S1, putting the alkali residue into the reaction tank 1 from the opening 11, and closing the opening 11, and then injecting a quantitative acid solvent into the reaction tank 1, and the acid solvent and the alkali residue start a neutralization reaction; 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 is switched 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.

[0050] Working principle: When in use, a certain amount of alkali residue is first put into the reaction tank 1 from the opening 11, and then the opening 11 is closed. This is because toxic gas will be generated when the alkali residue reacts with the acidic solvent, and closing the opening 11 can prevent the toxic gas from overflowing. An injection port for adding an 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 run, 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 from the bottom of the reaction tank 1 around the axis 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, it is difficult for solid impurities 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 that the alkali slag partially 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 which time the ends of the adjacent scrapers 21 in the same group are successively connected and form a receiving surface, and when the receiving surface rotates around the axis of the reactor 1, there is no cleaning blind spot on the receiving surface, because the length direction of the receiving surface is parallel to the axis direction of the reactor 1, and when the receiving surface rotates, the solid impurities at the bottom of the reactor 1 will be shoveled up by the receiving surface toward one end of the inner wall of the reactor 1, and the solvent after the reaction can pass through the receiving surface, and 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 ensured to be discharged smoothly from the opening 11.

[0051] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A caustic residue treatment device, comprising a reaction tank (1) for chemically treating the caustic residue; It is characterized in that 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 arranged inside the reaction tank (1). The rotating unit (2) comprises a plurality of groups of scrapers (21) rotating around the axis of the reaction tank (1). Each group comprises a plurality of 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, gaps exist 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.

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 alkaline slag treatment device according to claim 1, characterized in that: 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 arranged 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), and 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).

4. The alkali slag treatment device according to claim 3, characterized in that: A bracket (24) is arranged in the reaction tank (1) to rotate around the axis of the reaction tank (1), and a rotating rod (22) is arranged on the bracket (24) and rotates around the axis of the reaction tank (1) synchronously with the bracket (24).

5. The alkali residue treatment device according to claim 4, characterized in that: A second gear (221) is fixedly arranged at the end of the rotating rod (22), and a rack (222) is movably arranged on one side of the second gear (221) along the axial direction of the reaction tank (1), and the rack (222) and the second gear (221) are meshed with each other.

6. The alkali residue treatment device according to claim 5, characterized in that: 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.

7. The alkali residue treatment device according to claim 6, characterized in that: 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) is extended; when the extrusion rod (2233) slides out of the inflatable sleeve (2232), the bellows (2231) is shortened.

8. The alkali residue treatment device according to claim 7, characterized in that: A driving ring (2234) fixedly connected to the extrusion rod (2233) is rotatably arranged on the end of the bracket (24) along the axis of the reaction tank (1); a plurality of magnetic attraction blocks (2236) are evenly and fixedly arranged on the driving ring (2234) around the axis of the driving ring (2234); a plurality of electromagnets (2235) which are energized in sequence are evenly arranged on the bracket (24) around the axis of the driving ring (2234); and the electromagnets (2235) which are energized have a magnetic attraction effect on the magnetic attraction blocks (2236).

9. The alkali residue treatment device according to claim 7, characterized in that: A rotating block (224) is rotatably arranged 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).

10. A method for treating alkaline slag, using an alkaline slag treating device according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: S1, putting the alkali residue into the reaction tank (1) from the opening (11), and closing the opening (11), and then injecting a quantitative acidic solvent into the reaction tank (1), and the acidic solvent and the alkali residue begin a neutralization reaction; 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 and passes through the bottom of the reaction tank (1), the volume can pass through the receiving surface smoothly, while 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).

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