A device for continuously disposing electrolytic manganese residue in a harmless manner

Abstract

The present application relates to electrolytic manganese residue harmless treatment technical field, especially a kind of continuous harmless disposal electrolytic manganese residue device, including raw material crushing component, stirring homogenization component, steam treatment component and ammonia gas recovery component and four main components, and each component is connected using sealed communication pipe, and through ammonia gas outlet a, ammonia gas outlet b and steam exhaust pipe, by controlling electrolytic manganese residue disposal process solid material plugging, air curtain positive pressure control etc., realize ammonia gas organized, segmented recovery, greatly guarantee the professional health of production workshop worker, and realize tail gas standard discharge, while reducing basic material consumption, and reduce electrolytic manganese residue ammonia nitrogen leaching rate and improve the solidification rate of heavy metal manganese element etc., realize the efficient removal of ammonia nitrogen in electrolytic manganese residue.

Description

TECHNICAL FIELD

[0001] The present application relates to the harmless treatment technology field of electrolytic manganese residue, and particularly relates to a device for continuously disposing electrolytic manganese residue. BACKGROUND

[0002] The electrolytic manganese metal adopts a treatment process of "leaching-purification-electrolysis", mainly adopts manganese ore powder and sulfuric acid leaching reaction to prepare manganese sulfate solution, then adds ammonia water as a buffer, and then is purified and electrolyzed to produce electrolytic manganese metal; the ammonia water added in the final production process reacts with sulfuric acid to form ammonium sulfate, and the ammonium sulfate and the leached soluble manganese ions and other pollutants are left in the electrolytic residue and are discharged together with the electrolytic manganese residue. Because the content of soluble manganese, ammonia and other pollutants in the electrolytic manganese residue is high, it is detected that the manganese ion concentration in the electrolytic manganese residue leaching solution can reach about 1000 mg / L, and the ammonia nitrogen concentration can reach about 400 mg / L, which is far higher than the requirements of relevant national standards, for example, the upper limit of ammonia nitrogen concentration of 15 mg / L and the upper limit of manganese ion concentration of 2 mg / L specified in the "Standard for Pollution Control on Storage and Landfill of General Industrial Solid Waste", which poses a serious threat to the environment, and makes it difficult to utilize the electrolytic manganese residue as a resource, especially for preparing autoclaved aerated concrete, concrete bricks / block and other products, which continuously escapes with the incorporation of cement, resulting in a high ammonia concentration in the production area and other places, directly affecting the safety and environmental protection of the resource utilization of the electrolytic manganese residue.

[0003] Currently, the main harmless treatment methods of electrolytic manganese residue include water washing, high temperature, solidification and stabilization, etc. Among them, lime is one of the main raw materials for treating electrolytic manganese residue because it is easy to obtain and has good solidification effect on manganese ions. It is also one of the main technical routes for harmless treatment of electrolytic manganese residue. However, due to the fact that ammonia is easily soluble in water, ammonia is left in the form of ammonia water in the attached water of electrolytic manganese residue during the disposal process of alkaline materials such as lime, which makes the efficiency of harmless removal of ammonia nitrogen from electrolytic manganese residue low and the effect poor. At the same time, in the existing technology, alkaline materials such as lime are mostly used for intermittent disposal in the harmless treatment of electrolytic manganese residue, which makes it difficult to recover ammonia nitrogen during the process of harmless resource treatment and utilization of electrolytic manganese residue. When large-scale harmless disposal of electrolytic manganese residue is carried out, it is difficult to meet the emission standard requirements of ammonia nitrogen and other odorous gases. Therefore, there is a technical scheme in the existing technology that considers the organized recovery of ammonia nitrogen generated by electrolytic manganese residue-lime harmless disposal, for example: the method for directly extracting and recovering ammonia nitrogen from electrolytic manganese residue disclosed in patent application No. 201210301899, which discloses a process of absorbing the released gaseous ammonia through a negative pressure air suction device cover above the stirrer, then introducing it into a multi-stage absorption device, and using water or dilute sulfuric acid to absorb it, converting it into ammonia water and ammonium sulfate. However, in this process, the ammonia gas released naturally is recovered and utilized, but the ammonia nitrogen component in the electrolytic manganese residue cannot be fully removed, which affects the resource utilization rate and range of the electrolytic manganese residue after treatment. For another example: the method for deaminating and desulfurizing manganese residue by using a rotary kiln disclosed in patent application No. 202210233302.8, which stirs the composite deamination agent and electrolytic manganese residue in a mixer, uses kiln head waste heat and hot blast furnace heating to treat for 1 h at 200-300 DEG C, obtains deamination residue and mixed gas, and then recovers the mixed gas in an ammonia recovery system. However, in this technical document, the ammonia nitrogen in the electrolytic manganese residue is treated by fully utilizing waste heat, and the ammonia nitrogen is removed under the action of the composite deamination agent, which improves the deamination efficiency. However, the solidification effect of electrolytic manganese residue is poor in this method, which results in poor treatment effect of electrolytic manganese residue.

[0004] However, the existing technology of electrolytic manganese residue harmless disposal still has many defects, and is limited by the standard requirements of electrolytic manganese residue harmless disposal, which makes it difficult to scale up the harmless disposal of electrolytic manganese residue and the ammonia nitrogen recovery process, resulting in high cost of electrolytic manganese residue harmless disposal and serious threat to workers' occupational health. SUMMARY

[0005] The researchers of the present application aim to realize the organized recovery of ammonia gas in the harmless treatment process of electrolytic manganese residue, better solidification and stabilization of soluble metal manganese and other metal elements in electrolytic manganese residue, and improvement of the harmless treatment effect of electrolytic manganese residue, so as to fully promote the escape of ammonia nitrogen and realize its full recycling, and then realize the large-scale promotion and implementation of the harmless treatment process of electrolytic manganese residue, and carry out the harmless treatment process and device of electrolytic manganese residue, thereby providing a continuous harmless treatment device for electrolytic manganese residue in the technical field of harmless treatment of electrolytic manganese residue.

[0006] The technical scheme is specifically as follows:

[0007] The device for continuously treating electrolytic manganese residue includes a crushing assembly, a mixing assembly, a stirring and homogenizing assembly, a steam treatment assembly, a feeding unit and a harmless residue conveying assembly. The mixing assembly includes an ammonia gas outlet a, a mixed material discharge outlet, a material hopper and a spiral stirring shaft capable of conveying material from the material hopper to the mixed material discharge outlet. The stirring and homogenizing assembly includes an ammonia gas outlet b, a mixed material feeding inlet, a discharge end and a spiral stirring shaft capable of conveying material from the mixed material feeding inlet to the discharge end. A sealed communication pipe is arranged between the mixed material feeding inlet and the mixed material discharge outlet. The steam treatment assembly includes a steam cylinder, the steam cylinder is provided with a heat preservation layer, the right end of the steam cylinder is provided with a positive pressure air curtain, and the steam cylinder is provided with a conveying assembly capable of conveying material from the left end of the steam cylinder to the right end of the steam cylinder. The right end of the conveying assembly extends out of the right end of the steam cylinder. The top of the steam cylinder is provided with a steam discharge pipe, the bottom of the steam cylinder is provided with a plurality of steam inlet pipes, and the bottom of the steam cylinder close to the right end is provided with a drain pipe. The discharge end extends into the left end of the steam cylinder. A harmless residue conveying assembly is arranged below the right end of the conveying assembly. The steam discharge pipe, the ammonia gas outlet a and the ammonia gas outlet b are connected with a tail gas collection pipe, and the tail gas collection pipe is connected with a condensation and heat exchange assembly. The feeding unit is installed between the crushing assembly and the mixing assembly, and the feeding unit can convey material into the material hopper.

[0008] After the discharged wet electrolytic manganese residue is crushed by the crushing assembly, the crushed material is conveyed into the hopper by the feeding unit, and the material in the alkali material tank is conveyed into the hopper, which enters the mixing assembly through the hopper, is mixed after stirring, is sent into the stirring and homogenizing assembly, is sent into the steam treatment assembly after stirring and homogenizing, is discharged into the harmless residue conveying assembly after being treated by steam, and is conveyed into the storage library or warehouse or tank, realizing continuous harmless disposal of electrolytic manganese residue, and realizing recycling of ammonia nitrogen after sufficient treatment through the sealed connection between the mixing assembly, the stirring and homogenizing assembly and the steam treatment assembly, avoiding ammonia gas escaping into the environment during the mixing, stirring and homogenizing and steam treatment processes, and realizing solidification and stabilization of soluble manganese ions and other pollutants in the electrolytic manganese residue, reducing the danger in the resource utilization process.

[0009] The setting of the crushing assembly realizes pre-dispersion treatment of the cake-shaped electrolytic manganese residue, the sealed mixing assembly and the stirring and homogenizing assembly are connected through the sealed communication pipe, the ammonia gas outlet a and the ammonia gas outlet b are provided, which can ensure the discharge and recycling of ammonia gas and limit the unorganized escape during the mixing and stirring and homogenizing of the electrolytic manganese residue, improve the recycling rate of ammonia gas, and reduce the cost of ammonia nitrogen recycling. The steam treatment assembly and the structure thereof are used to control the connection relationship between the stirring and homogenizing assembly and the steam treatment assembly, realize steam treatment, promote the escape of ammonia nitrogen in the electrolytic manganese residue, and use the positive pressure control of the positive pressure air curtain, the ammonia gas outlet b and the steam exhaust pipe to control the negative pressure of the entire device, limit the unorganized escape of ammonia gas, ensure the recycling efficiency and effect of ammonia nitrogen, and reduce the pollution to the environment. The professional health of the workers is more greatly ensured, and the ammonia nitrogen removal rate is improved.

[0010] In order to reduce the escape rate of ammonia nitrogen in the steam treatment assembly treatment process and realize full contact of the material entering the steam treatment assembly with steam after being spread, the stirring and homogenizing assembly is provided with a shaped end, which is located at the right end of the discharge end; the conveying assembly includes a driven wheel arranged inside the steam cylinder, a driving wheel arranged outside the right end of the steam cylinder, and a conveying belt arranged between the driving wheel and the driven wheel; the harmless residue conveying assembly is located directly below the driving wheel, and the shaped end is located directly above the driven wheel.

[0011] In order to avoid the escape of ammonia nitrogen in the steam treatment assembly treatment process, the driven wheel is close to the left end of the steam cylinder, and the left end of the steam cylinder and the discharge end are in sealed connection.

[0012] In order to enhance the stability, at the same time, the negative pressure regulation of the whole device inside can be realized, the ammonia nitrogen recovery rate requirement is met, preferably, a plurality of support beams are arranged in the steam cylinder, and the support beams are located between the driven wheel and the driving wheel, and the support beams are used for supporting the conveying belt; a positive pressure air curtain is arranged at the right end of the steam cylinder, and a hole for outputting the material on the conveying belt can be formed between the positive pressure air curtain and the conveying belt, and the positive pressure air curtain can be tightly attached to the upper surface of the material.

[0013] In order to realize the replaceable forming end of the stirring forming assembly, it is convenient to replace it into the forming end for manufacturing granular material or sheet material, and the effect of harmless treatment of electrolytic manganese residue is optimized, preferably, the stirring and homogenizing assembly comprises a forming cylinder and a forming end, the forming end and the forming cylinder are integrally connected by threads, and the forming end is integrally formed with a forming plate, the center of the forming plate is provided with a bearing, and the screw stirring shaft is located in the forming cylinder; the left end of the screw stirring shaft is connected with a stirring motor by penetrating out of the left end of the forming cylinder, and a bearing is arranged between the screw stirring shaft and the forming cylinder; the right end of the screw stirring shaft is inserted into the bearing located in the center of the forming plate, and a plurality of forming holes communicating inside and outside the forming cylinder are arranged on the forming plate; a screw stirring shaft is arranged in the mixing assembly, the right end of the screw stirring shaft is movably connected by a bearing, and the left end of the screw stirring shaft is connected with a stirring motor by penetrating out of the mixing assembly.

[0014] In order to realize the replaceable forming end of the stirring forming assembly, it is convenient to replace it into the forming end for manufacturing granular material or sheet material, and the effect of harmless treatment of electrolytic manganese residue is optimized, preferably, the stirring and homogenizing assembly comprises a forming cylinder and a forming end, the forming end and the forming cylinder are integrally connected by threads, and the forming end is integrally formed with a forming plate, the center of the forming plate is provided with a bearing, and the screw stirring shaft is located in the forming cylinder; the left end of the screw stirring shaft is connected with a stirring motor by penetrating out of the left end of the forming cylinder, and a bearing is arranged between the screw stirring shaft and the forming cylinder; the right end of the screw stirring shaft is inserted into the bearing located in the center of the forming plate, and a plurality of forming holes communicating inside and outside the forming cylinder are arranged on the forming plate; a screw stirring shaft is arranged in the mixing assembly, the right end of the screw stirring shaft is movably connected by a bearing, and the left end of the screw stirring shaft is connected with a stirring motor by penetrating out of the mixing assembly.

[0015] In order to realize the replaceable forming end of the stirring forming assembly, it is convenient to replace it into the forming end for manufacturing granular material or sheet material, and the effect of harmless treatment of electrolytic manganese residue is optimized, preferably, the stirring and homogenizing assembly comprises a forming cylinder and a forming end, the forming end and the forming cylinder are integrally connected by threads, and the forming end is integrally formed with a forming plate, the center of the forming plate is provided with a bearing, and the screw stirring shaft is located in the forming cylinder; the left end of the screw stirring shaft is connected with a stirring motor by penetrating out of the left end of the forming cylinder, and a bearing is arranged between the screw stirring shaft and the forming cylinder; the right end of the screw stirring shaft is inserted into the bearing located in the center of the forming plate, and a plurality of forming holes communicating inside and outside the forming cylinder are arranged on the forming plate; a screw stirring shaft is arranged in the mixing assembly, the right end of the screw stirring shaft is movably connected by a bearing, and the left end of the screw stirring shaft is connected with a stirring motor by penetrating out of the mixing assembly.

[0016] In order to realize continuous feeding and guarantee continuous harmless treatment of electrolytic manganese residue, preferably, the feeding unit comprises an alkaline material tank, a manganese residue tank and a belt conveying assembly; the bottom of the alkaline material tank is provided with a metering scale, a conveying pipeline is arranged between the metering scale and the material hopper, and the conveying pipeline can convey the material weighed on the metering scale into the material hopper; a belt conveying assembly is arranged between the manganese residue tank and the crushing assembly, and the belt conveying assembly can convey the material in the manganese residue tank into the crushing assembly for crushing treatment; a belt conveying assembly is arranged between the crushing assembly and the material hopper, and the belt conveying assembly can convey the crushed material from the crushing assembly into the material hopper;

[0017] In order to enhance the stability of the whole device, preferably, the bottom of the steam treatment assembly is provided with a support, the support is provided with a through bolt hole up and down, and a bolt is matched arranged in the bolt hole;

[0018] In order to guarantee that the electrolytic manganese residue entering the steam treatment assembly can be fully contacted with steam and be fully disposed by steam, preferably, the conveying assembly maintains the conveying time of the material from left to right in the steam treatment assembly between 1-15h.

[0019] In order to realize full and organized recycling of ammonia nitrogen escaped from the electrolytic manganese residue in the mixing, stirring and homogenizing and steam harmless treatment process, preferably, the ammonia gas outlet a and / or the ammonia gas outlet b is connected with a negative pressure chamber through a pipeline, the tail end of the negative pressure chamber is provided with an ammonia gas pipe, and the ammonia gas pipe is connected with a condensation heat exchange assembly; the steam exhaust pipe is connected with an ammonia-containing steam pipe, and the ammonia-containing steam pipe is connected with a condensation heat exchange assembly.

[0020] In order to improve the recycling efficiency and effect of escaped ammonia nitrogen, preferably, the pressure in the negative pressure chamber is < the pressure in the mixing assembly and / or the pressure in the stirring and homogenizing assembly.

[0021] In order to realize better sealing effect, preferably, a longitudinal sealing assembly is arranged between the mixing assembly and the stirring and homogenizing assembly, the longitudinal sealing assembly is integrally welded with the right end of the mixing assembly near the side wall of the top end, the longitudinal sealing assembly is communicated with the interior of the stirring and homogenizing assembly near the bottom end, a partition plate is arranged in the longitudinal sealing assembly, the partition plate divides the longitudinal sealing assembly into a sealing cavity at the lower end and a transmission cavity at the top end, the mixing assembly and the sealing cavity near the top are communicated through a sealed communication pipe, the sealed communication pipe can convey the material in the mixing assembly into the sealing cavity, a bearing is arranged at the center of the partition plate, a rotating shaft is arranged in the bearing, the top end of the rotating shaft is located in the transmission cavity, the top end of the rotating shaft intersects with the spiral stirring shaft extending from the right end of the mixing assembly, a transmission part for changing the rotating direction is arranged at the intersection position, and a plurality of extrusion leaves are arranged on the rotating shaft in the sealing cavity.

[0022] More preferably, the top of the transmission cavity is sealed by a partition plate, a bearing is arranged at the center of the partition plate, the top end of the rotating shaft penetrates through the top of the transmission cavity through the bearing, and an electric motor is arranged at the top end of the rotating shaft, so that the electric motor drives the rotating shaft to rotate, and then the material is pushed downward.

[0023] Compared with the prior art, the technical effects of the present application are embodied in:

[0024] (1) The mixing assembly, the stirring and homogenizing assembly, the ammonia outlet a and the ammonia outlet b are arranged on the mixing assembly and the stirring and homogenizing assembly respectively, the sealed communication pipe is arranged between the mixing assembly and the stirring and homogenizing assembly, and the connection relationship between the stirring and homogenizing assembly and the steam treatment assembly is arranged, so that the ammonia-containing gas generated in the mixing and forming stage of the electrolytic manganese residue and the alkaline material and the ammonia-containing steam generated in the steam treatment stage are directly collected and treated, the pollution to the environment is avoided, and the occupational health of the workers in the harmless treatment of the electrolytic manganese residue is greatly ensured.

[0025] (2) The present application realizes the continuous harmless treatment of the electrolytic manganese residue through the linkage of the mixing, stirring and homogenizing assembly and the steam treatment assembly, realizes the batch treatment of the electrolytic manganese residue, has simple device structure, convenient installation and low cost, can fully meet the harmless treatment of the electrolytic manganese residue, can meet the "green production" in the process of the harmless treatment of the electrolytic manganese residue, is helpful to promote the "green factory" construction of the electrolytic manganese residue harmless treatment factory, and realizes industrialized popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Overall structure schematic diagram of the application.

[0027] Figure 2 For Figure 1 Overall structure schematic diagram of the application.

[0028] Figure 3 For Figure 1 Overall structure schematic diagram of the application.

[0029] Figure 4 For Figure 3 Overall structure schematic diagram of the application.

[0030] Figure 5 Cross-sectional structure schematic diagram of the steam treatment assembly.

[0031] Figure 6 Right end head structure schematic diagram of the molding equipment.

[0032] Figure 7 Another embodiment connection relationship diagram between the mixing assembly and the stirring and homogenizing assembly.

[0033] Figure 8 For Figure 7 Another embodiment structure schematic diagram.

[0034] 1-manganese residue tank 2-belt conveying assembly 3-alkaline material tank 4-mixing assembly 5-stirring and homogenizing assembly 6-steam treatment assembly 7-harmless residue conveying assembly 8-support column 9-sealing communication pipe 10-tail gas collection pipe 11-stirring motor 12-spiral stirring shaft 13-negative pressure chamber 14-ammonia pipe 15-ammonia-containing steam pipe 16-crushing assembly 17-longitudinal sealing assembly 18-baffle 19-transmission member 20-motor.

[0035] 301-metering scale 302-conveying pipeline 401-ammonia outlet a 402-material hopper 501-ammonia outlet b 502-molding cylinder 503-molding end head 504-molding plate 505-bearing 601-steam cylinder 602-thermal insulation layer 603-supporting beam 604-conveying belt 605-positive pressure air curtain 606-driving wheel 607-steam inlet pipe 608-drainage pipe 609-steam discharge pipe 610-bracket 611-bolt.

[0036] 17.1-sealing cavity 17.2-rotating shaft 17.3-extrusion blade 17.4-transmission cavity. DETAILED DESCRIPTION

[0037] The technical solutions of the application will be further limited in combination with the drawings and specific embodiments, but the scope of protection is not limited to the description.

[0038] In some embodiments, as shown in Figure 1 and Figure 2 The device for continuously disposing electrolytic manganese residue is shown in the drawings, which comprises a crushing assembly 16, a mixing assembly 4, a stirring and homogenizing assembly 5, a steam treatment assembly 6, a feeding unit and a harmless residue conveying assembly 7. The crushing assembly 16 is used to pre-disperse the electrolytic manganese residue, alkaline materials and other ingredients in the form of a cake, so as to ensure that the electrolytic manganese residue and alkaline materials in the mixing assembly 4 can be fully mixed and the uniformity of the mixture is ensured. Figure 1 and Figure 2 and Figure 3 and Figure 4 The mixing assembly 4 comprises an ammonia gas outlet a401, a mixed material discharge outlet, a material hopper 402 and a spiral stirring shaft 12 capable of conveying materials from the material hopper 402 to the end of the mixed material discharge outlet. The ammonia gas generated and escaped in the mixing assembly 4 is discharged from the ammonia gas outlet a401 to the mixing assembly 4, which fully avoids the accumulation of gas in the interior to hinder the conveying of materials in the device, thereby causing the defect of high energy consumption. At the same time, the spiral stirring shaft 12 is used to fully mix the alkaline materials and the electrolytic manganese residue, and to pre-recover the ammonia nitrogen generated and escaped in the mixing process. The mixed materials can be conveyed to the stirring and homogenizing assembly 5 under a sealed condition. In some embodiments, the bottom of the mixing assembly 4 is provided with a plurality of supporting columns 8 to enhance the stability. Figures 1-6As shown, the stirring homogenization assembly 5 includes an ammonia outlet b501, a mixed material feeding inlet, a material discharging end (which can ensure that the material in the stirring homogenization assembly 5 is formed and discharged, for example, a plurality of round holes are provided, so that the material can be extruded into granular shape; for another example, a rectangular hole with a length of 5 cm and a height of 0.3-0.5 cm is provided, so that the material can be extruded into a sheet shape.) and a spiral stirring shaft 12 capable of conveying the material from the mixed material feeding inlet to the material discharging end; the material discharged from the mixed material discharging outlet of the mixing assembly 4 can be fed through the mixed material feeding inlet, stirred and homogenized by the spiral stirring shaft 12, thereby improving the homogenization effect of the material and enhancing the interaction effect of the material, while utilizing the effect of the ammonia outlet b501 to realize the pre-recovery of ammonia nitrogen, which helps to reduce energy consumption. A sealed communication pipe 9 is provided between the mixed material feeding inlet and the mixed material discharging outlet; the sealed communication is realized to avoid escaping ammonia nitrogen, thereby improving the treatment effect and ammonia nitrogen recovery efficiency. The stirring forming assembly 5 is stably supported by a plurality of support columns 8 to achieve the purpose of enhancing stability. The steam treatment assembly 6 includes a steam cylinder 601, the steam cylinder 601 is provided with a heat preservation layer 602 (for example, a cast ceramic heat preservation material or a heat insulation plate is installed to achieve), a right end of the steam cylinder 601 is provided with a positive pressure air curtain 605 (for example, a cloth curtain with heat preservation properties is suspended, so that the bottom end of the cloth curtain contacts the surface of the conveying assembly, thereby enhancing the sealing property of the right end of the steam assembly 6, reducing steam escape and heat loss, and also preventing ammonia nitrogen from escaping, thereby improving the recovery rate. The function realized by the positive pressure air curtain 605 also needs to be combined with the function of the steam exhaust pipe 609 provided at the top of the steam cylinder 601 of the steam treatment assembly 6, and also needs to be combined with the material pulling effect on the conveying assembly, so that the force of the steam cylinder 601 inner pressure on the positive pressure air curtain 605 is equivalent to the pressure balance effect outside the steam cylinder 601, thereby realizing sealing and improving the sealing property. The conveying assembly is made of high-temperature resistant material, for example, a steel track, which is prepared by referring to the track structure of a tank, so as to realize the high-temperature resistance of the conveying assembly in the inner section of the steam cylinder 601. The right end of the conveying assembly extends out of the right end of the steam cylinder 601. The top of the steam cylinder 601 is provided with a steam exhaust pipe 609, the bottom of the steam cylinder 601 is provided with a plurality of steam inlet pipes 607, and the bottom of the steam cylinder 601 close to the right end is provided with a drain pipe 608. The material discharging end extends into the left end of the steam cylinder 601. The right end of the conveying assembly is provided with a harmless slag conveying assembly 7 below, which can convey the harmless slag discharged from the steam treatment assembly 6 into a harmless slag storage warehouse for storage.The steam exhaust pipe 609, the ammonia gas outlet a401 and the ammonia gas outlet b501 are connected with a tail gas collecting pipe 10, and the tail gas collecting pipe 10 is connected with a condensation heat exchange assembly (for example, a condenser capable of condensing gas into liquid in the prior art, achieving the purpose of condensing ammonia nitrogen components into high-concentration ammonia water for recycling); the feeding unit is installed between the crushing assembly 16 and the mixing assembly 4, and the feeding unit can deliver materials into the material hopper 402.

[0039] When the device is in operation, after the material is delivered into the mixing assembly 4 through the material hopper 402 by the feeding unit, the material is stirred and mixed by the spiral stirring shaft 12, discharged through the mixed material discharge port, and delivered into the stirring and homogenizing assembly 5 through the sealed communication pipe 9, and then stirred and extruded by the spiral stirring shaft 12, so that the material is extruded and formed from the right end of the stirring and forming assembly 5, delivered onto the conveying assembly, and high-temperature steam, for example, steam at 100-250℃, is delivered into the steam treatment assembly 6, so that the material stirred and homogenized in the stirring and homogenizing assembly 5 is subjected to steam treatment, and the material treated in the steam treatment assembly 6 is transported into the harmless residue storage warehouse through the conveying belt in the harmless residue conveying assembly 7 after being conveyed into the harmless residue conveying assembly 7 through the conveying belt, and then waits for resource utilization. The harmless residue conveying assembly 7 can adopt a tipper, a conveying belt or the like. For the ammonia-containing gas generated during the mixing in the mixing assembly 4 and the stirring and homogenizing assembly 5 and the ammonia-containing steam generated during the steam treatment in the steam treatment assembly 6, the tail gas collecting pipe 10 is used to collect the gas and the steam and deliver them into the heat exchange and condensation assembly to condense and recycle high-concentration liquid ammonia, so that the ammonia components can be recycled, the escape of ammonia components generated during the harmless treatment of electrolytic manganese residue can be reduced, the occupational health of workers engaged in the harmless treatment of electrolytic manganese residue can be improved, and the impact of the escaped ammonia components on the environment can be reduced. The use of the steam method for the harmless treatment of electrolytic manganese residue can be fully ensured, the harmful metal elements in the solidified electrolytic manganese residue can be improved, and the leaching rate of ammonia nitrogen in the harmless electrolytic manganese residue can be reduced.

[0040] The above treatment device is applied to the harmless test of electrolytic manganese residue using quicklime, and the results are as follows:

[0041] Application 1:

[0042] After electrolytic manganese residue and quicklime are measured at 100:6, they are sent into the material hopper 401, enter into the mixing assembly 4 for stirring and mixing, the stirring and mixing material is sent into the stirring and homogenizing assembly 5 to prepare into granules with a particle size of 3-5 cm, is discharged to the steam treatment assembly 6 through the right end of the stirring and forming assembly 5, and is sent into steam with a temperature of 190 DEG C through the steam inlet pipe 607, under the action of the conveying assembly, the granules prepared by granulation are transported from left to right in the steam treatment assembly 6, and the conveying speed of the conveying assembly in the steam treatment assembly 6 can make the time from the leftmost end to the steam treatment assembly 6 be 5 h, and harmless residue is obtained.

[0043] Application 2:

[0044] On the basis of application 1, electrolytic manganese residue and quicklime are measured at 100:8, and are treated by 100 DEG C steam for 10 h to obtain harmless residue.

[0045] The harmless residue obtained in application 1 and application 2 is detected as raw material; untreated electrolytic manganese residue (raw residue) is detected as raw material; electrolytic manganese residue and lime are directly stirred and mixed uniformly according to the mass ratio of application 1 and are placed for 5 h as a control raw material.

[0046] Detection method: ammonia nitrogen and Mn leaching are carried out according to the Solid Waste Leaching Toxicity Leaching Method Horizontal Oscillation Method (HJ557-2010), the leaching solid ratio is 10:1, oscillation is carried out on a horizontal oscillator for 8 h, and standing is carried out for 16 h to obtain leaching liquor; PH value, ammonia nitrogen concentration and soluble manganese concentration of the leaching liquor are detected according to the Water Quality Ammonia Nitrogen Determination Nessler Spectrophotometric Method (HJ535-2009), at the same time, water content is detected by drying at 60 DEG C to constant weight, and the results are shown in Table 1.

[0047] Table 1

[0048]

[0049] Note: each group of data is detected for 5 times to take an average value.

[0050] The application fully considers that a large amount of ammonia gas will escape after electrolytic manganese residue is mixed with alkaline material, and a large amount of ammonia nitrogen component will be contained in steam in the steam treatment process, realizes ammonia nitrogen recovery in the mixing, forming and steam treatment processes, reduces ammonia nitrogen escape rate, reduces pollution to the environment of a worker, a treatment workshop and the like, and helps to protect occupational health. Meanwhile, through utilization research on the device, the device can fully meet the harmless treatment of electrolytic manganese residue by using alkaline material, reduces the leaching rate of soluble manganese and ammonia nitrogen in the harmless residue, and truly realizes the harmless treatment of electrolytic manganese residue, and reduces the pollution risk of electrolytic manganese residue to the environment.

[0051] As shown in Figures 1-6 In some embodiments, the stirring homogenizing assembly 5 is provided with a shaped end head 503 (for example, a plurality of round holes are provided to enable the material to be extruded into granular form; for another example, a rectangular hole with a length of 5 cm and a height of 0.3-0.5 cm is provided to enable the material to be extruded into a sheet shape), and the shaped end head 503 is located at the right end of the discharge end; the conveying assembly includes a driven wheel provided inside the steam cylinder 601, a driving wheel 606 provided outside the right end of the steam cylinder 601, and a conveying belt 604 provided between the driving wheel 606 and the driven wheel (the conveying belt 604 is made of high-temperature-resistant material, for example, a steel track, which is prepared by referring to the track structure of a tank running, to enable the conveying belt 604 inside the steam cylinder 601 to resist high temperature); the harmless slag conveying assembly 7 is located directly below the driving wheel 606 (to avoid the harmless slag from falling to the ground), and the shaped end head 503 is located directly above the driven wheel (to sufficiently ensure that the material falls onto the conveying belt 604). In some embodiments, the driven wheel is close to the left end of the steam cylinder 601, and the left end of the steam cylinder 601 is in sealing connection with the discharge end. In some embodiments, a plurality of support beams 603 are provided inside the steam cylinder 601, and the support beams 603 are located between the driven wheel and the driving wheel 606, and the support beams 603 are used to support the conveying belt 604; the right end of the steam cylinder 601 is provided with a positive pressure air curtain 605, and the positive pressure air curtain 605 and the conveying belt 604 can form a hole for the material on the conveying belt 604 to output, and the positive pressure air curtain 605 can be tightly attached to the upper surface of the material.

[0052] The researchers of the present application know through adjustment tests during the improvement process of the device that: for the material discharged from the stirring homogenizing assembly 5 without being extruded into a shape, directly entering the steam treatment assembly 6, and being treated according to the treatment mode of application 1, the electrolytic manganese slag is harmless, and after detection, the pH is 7.8, the ammonia nitrogen is >11 mg / L, and the soluble manganese content is 1.37 mg / L.

[0053] As shown in Figures 1-6As shown, in some embodiments, the stirring homogenizing assembly 5 comprises a forming cylinder 502 and a forming end 503 which is integrally connected with the forming cylinder 502 by screw thread and is integrally provided with a forming plate 504 in the center of which is arranged a bearing 505, and the screw stirring shaft 12 is located in the forming cylinder 502; the left end of the screw stirring shaft 12 is connected with the stirring motor 11 and is provided with a bearing 505 between the screw stirring shaft 12 and the forming cylinder 502; the right end of the screw stirring shaft 12 is inserted into the bearing 505 located in the center of the forming plate 504, and the forming plate 504 is provided with a plurality of forming holes which are in communication with the inside and outside of the forming cylinder 502; the mixing assembly 4 is provided with a screw stirring shaft 12, the right end of which is movably connected by a bearing 505, and the left end of the screw stirring shaft 12 is connected with the stirring motor 11.

[0054] In some embodiments, the screw stirring shaft 12 is a double-shaft screw stirring shaft or a multi-shaft screw stirring shaft.

[0055] In some embodiments, the forming end 503 is a cone, the right end of which is provided with the forming plate 504, and the forming plate 504 is provided with a plurality of forming holes which can extrude the material into particles with a particle size of ≤10 cm or into sheets with a thickness of 1-10 mm and a width of 10-50 cm by the action of the screw stirring shaft 12, and the forming end 503 realizes the sealing and blocking between the stirring homogenizing assembly 5 and the steam treatment assembly 6 by extrusion. After the alkaline material mixture such as electrolytic manganese residue, quicklime or calcined raw material is extruded into granular or rolled into sheet, it is sent into the steam treatment assembly 6 for steam treatment, which improves the harmless treatment effect of the electrolytic manganese residue.

[0056] As Figure 1 and Figure 3As shown, in this embodiment, the feeding unit includes an alkaline material tank 3, a manganese residue tank 1 and a belt conveying assembly 2; the alkaline material tank 3 contains alkaline materials such as calcined raw material, quicklime, etc., and is provided with a metering scale 301 at the bottom, and a conveying pipeline 302 is arranged between the metering scale 301 and the material hopper 402, which can convey the metered materials on the metering scale 301 into the material hopper 402; the manganese residue tank 1 contains manganese residue, and is provided with a belt conveying assembly 2 between the crushing assembly 16, the bottom end of the belt conveying assembly 2 is located at the bottom of the manganese residue tank 1, and the top end of the belt conveying assembly 2 is located at the top end of the crushing assembly 16, which can convey the materials (manganese residue) in the manganese residue tank 1 into the crushing assembly 16 for pre-dispersion treatment; a belt conveying assembly 2 is arranged between the crushing assembly 16 and the material hopper 402, which can convey the crushed materials from the crushing assembly 16 into the material hopper 402; in some embodiments, the steam treatment assembly 6 is provided with a support 610 at the bottom, the support 610 is provided with a bolt hole penetrating up and down, and a bolt 611 is matched arranged in the bolt hole; in some embodiments, the conveying assembly maintains the conveying time of the materials in the steam treatment assembly 6 from left to right between 1-15h. The alkaline material tank 3 is supported and stabilized by support columns 8, the manganese residue tank 1 is supported and stabilized by support columns 8, and the belt conveying assembly 2 is supported and stabilized by support columns 8; in use, the materials such as quicklime and calcined raw material are loaded into the alkaline material tank 3, and the electrolytic manganese residue is loaded into the manganese residue tank 1, and then conveyed into the material hopper 402 through the conveying pipeline 302 and the belt conveying assembly 2, enters the inside of the mixing assembly 4, is mixed by the spiral stirring shaft 12, and then conveyed into the stirring and homogenizing assembly 5 through the sealed communication pipe 9, and then sent into the steam treatment assembly 6 after being prepared into granules or tablets by the stirring and homogenizing assembly 5, and then treated by steam to realize the continuous harmless treatment of the electrolytic manganese residue by the steam method, which helps to reduce or even avoid the ammonia gas escape in the harmless treatment process of the electrolytic manganese residue, reduces the pollution to the environment, and helps to improve the occupational health of workers.

[0057] As Figure 3 and Figure 4As shown, in some embodiments, the ammonia outlet a401 and / or the ammonia outlet b501 are connected with a negative pressure chamber 13 through a pipeline, the negative pressure chamber 13 is provided with an ammonia pipe 14 at the tail end, and the ammonia pipe 14 is connected with a condensation heat exchange assembly; the steam exhaust pipe 609 is connected with an ammonia-containing steam pipe 15, and the ammonia-containing steam pipe 15 is connected with a condensation heat exchange assembly. After the ammonia components discharged from the mixing assembly 4 and the stirring and homogenizing assembly 5 and the ammonia-containing nitrogen steam components discharged from the steam treatment assembly 6 are condensed and heat exchanged, high-concentration ammonia water is formed, the ammonia nitrogen components are recovered, the ammonia escape rate in the electrolytic manganese residue harmless treatment process is reduced, the environmental pollution is reduced, and the occupational health of the electrolytic manganese residue treatment workers is improved.

[0058] In some embodiments, the pressure in the negative pressure chamber 13 is less than the pressure in the mixing assembly 4 or the pressure in the stirring and homogenizing assembly 5.

[0059] In some embodiments, the pressure in the negative pressure chamber 13 is less than the pressure in the homogenizing and mixing assembly 4; and the pressure in the negative pressure chamber 13 is less than the pressure in the stirring and forming assembly 5.

[0060] In some embodiments, the conveying belt 604 conveys the material on the conveying belt 604 from the left end of the steam cylinder 601 to the right end of the steam cylinder 601, and the operation time of discharging the material on the conveying belt 604 to the outside of the steam cylinder 601 is 1-15h, for example, application 1 for 5h and application 2 for 10h. The electrolytic manganese residue and the alkaline material forming particles or sheets are fully treated in the steam treatment assembly 6, the solidification effect of heavy metal manganese is enhanced, the escape of ammonia gas is improved, the harmless residue ammonia nitrogen leaching rate is reduced, and the ammonia nitrogen leaching rate can be reduced to below 1mg / L.

[0061] As Figure 7 and Figure 8As shown, in this embodiment, a longitudinal sealing component 17 is provided between the mixing component 4 and the stirring and homogenizing component 5. The side wall of the longitudinal sealing component 17 near the top is welded to the right end of the mixing component 4 to form a whole. The longitudinal sealing component 17 near the bottom communicates with the interior of the stirring and homogenizing component 5. A partition 18 is provided inside the longitudinal sealing component 17, which divides the longitudinal sealing component 17 into a sealing cavity 17.1 at the lower end and a transmission cavity 17.4 at the top. The mixing component 4 and the side wall of the sealing cavity 17.1 near the top are connected by a sealing connection. The connecting pipe 9 is connected, and the sealed connecting pipe 9 can transport the material located in the mixing assembly 4 to the sealed cavity 17.1; the partition plate 18 is provided with a bearing 505 at its center, and a rotating shaft 17.2 is provided in the bearing 505. The top end of the rotating shaft 17.2 is located in the transmission cavity 17.4, and the top end of the rotating shaft 17.2 intersects with the spiral stirring shaft 12 extending from the right end of the mixing assembly 4. A transmission component 19 for changing the rotation direction is provided at the intersection point. Several extrusion blades 17.3 are provided on the rotating shaft 17.2 located in the section inside the sealed cavity 17.1. Through the setting of this longitudinal sealing assembly 17, the material in the mixing assembly 4 can be pushed into the stirring and homogenizing assembly 5, while the stirring and homogenizing assembly 5 and the mixing assembly 4 are sealed to prevent gas in the stirring and homogenizing assembly 5 from escaping into the mixing assembly 4.

[0062] like Figure 8 As shown, in this embodiment, the top of the transmission cavity 17.4 is sealed with a partition 8, and a bearing 505 is provided at the center of the partition 8; the top of the rotating shaft 17.2 passes through the bearing 505 and exits the top of the transmission cavity 17.4, and a motor 20 is provided at the top of the rotating shaft 17.2, so that the motor drives the rotating shaft to rotate, thereby pushing the material downward.

[0063] Other matters not covered in this invention can be implemented by referring to existing technology or common knowledge and conventional technical means known to those skilled in the art. For example, a valve can be installed on the drain pipe 608, which can be a threaded valve or other valves; another example is that the stirring motor 11 can be a motor with a rated voltage of 380V; yet another example is that the top of the positive pressure air curtain 605 is hinged to the top of the steam cylinder 601, realizing a movable connection. This allows the material on the conveyor belt 604 to lift the positive pressure air curtain 605 when it is conveyed out of the steam treatment component 6. At the same time, the positive pressure air curtain 605 can seal the right end of the steam cylinder 601, preventing the gas in the steam cylinder 601 from escaping. This achieves the goal of maximizing the recovery of ammonia-containing vapor generated in the steam treatment component 6 while satisfying the material conveying requirements, thereby reducing the escape rate of ammonia nitrogen components.

[0064] In addition, the present application creates other unfinished matters, for example: the homogenizing mixing assembly 4 and the feeding unit component can be replaced by other structures, for example: refer to the structure disclosed in the patent No. 201821070181.5, open a gas hole at the top of the stirring barrel instead of the ammonia gas outlet a401, and then place electrolytic manganese residue and alkaline material in the ingredient barrels on both sides of the stirring barrel, use the action between the lifting screw and the lifting motor in the ingredient barrel to realize the metering input of the electrolytic manganese residue and the alkaline material into the stirring barrel, after stirring in the stirring barrel, through the sending mechanism instead of the sealing communication pipe 9 in the present application, realize the sealing connection between the stirring barrel and the stirring forming assembly 5.

[0065] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art within the technical range disclosed by the present application, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change, which should be covered in the protection scope of the present application.

Claims

1. A device for the continuous and harmless treatment of electrolytic manganese slag, characterized in that, include: Crushing assembly (16) is used to crush electrolytic manganese slag; The mixing assembly (4) includes an ammonia outlet a (401), a mixture outlet, a material hopper (402), and a spiral stirring shaft (12) capable of conveying material from the material hopper (402) to the mixture outlet. The mixing and homogenizing component (5) includes an ammonia outlet b (501), a mixture inlet, a discharge end, and a spiral mixing shaft (12) capable of conveying material from the mixture inlet to the discharge end; a sealed connecting pipe (9) is provided between the mixture inlet and the mixture discharge outlet. A steam treatment assembly (6) includes a steam cylinder (601), an insulation layer (602) inside the steam cylinder (601), a positive pressure air curtain (605) at the right end of the steam cylinder (601), and a conveying assembly inside the steam cylinder (601) capable of conveying materials from the left end to the right end of the steam cylinder (601), the right end of the conveying assembly extending out of the right end of the steam cylinder (601); a steam exhaust pipe (609) is provided at the top of the steam cylinder (601), and the steam... The bottom of the cylinder (601) is provided with several steam inlet pipes (607), and the bottom of the steam cylinder (601) near the right end is provided with a drain pipe (608); the discharge end extends into the left end of the steam cylinder (601); a harmless slag conveying assembly (7) is provided directly below the right end of the conveying assembly; the steam discharge pipe (609), the ammonia outlet a (401) and the ammonia outlet b (501) are all connected to a tail gas collection pipe (10), and the tail gas collection pipe (10) is connected to a condensation heat exchange assembly; The feeding unit is installed between the crushing component (16) and the mixing component (4) and is capable of conveying materials into the material hopper (402); The left end of the steam cylinder (601) is sealed to the discharge end; The conveying assembly includes a driven wheel located inside the steam cylinder (601), a driving wheel (606) located outside the right end of the steam cylinder (601), and a conveyor belt (604) located between the driving wheel (606) and the driven wheel; the harmless slag conveying assembly (7) is located directly below the driving wheel (606); the driven wheel is close to the left end of the steam cylinder (601); The spiral stirring shaft (12) is a multi-axis spiral stirring shaft, and the stirring and homogenizing component (5) also includes a forming cylinder (502) and a forming end (503). The forming end (503) is conical and is located directly above the driven wheel. The ammonia outlet a (401) and / or the ammonia outlet b (501) are connected to a negative pressure chamber (13) via pipes. The negative pressure chamber (13) is provided with an ammonia pipe (14) at its tail end. The ammonia pipe (14) is connected to a condensing heat exchange assembly. The steam exhaust pipe (609) is connected to an ammonia-containing steam pipe (15). The ammonia-containing steam pipe (15) is connected to a condensing heat exchange assembly. The pressure in the negative pressure chamber (13) is less than the pressure in the mixing component (4) and / or the pressure in the stirring and homogenizing component (5).

2. The apparatus as claimed in claim 1, characterized in that, The forming end (503) is located at the right end of the discharge end.

3. The apparatus as described in claim 1, characterized in that, The steam cylinder (601) is provided with a plurality of support beams (603), and the support beams (603) are located between the driven wheel and the driving wheel (606), and the support beams (603) are used to support the conveyor belt (604). The positive pressure air curtain (605) and the conveyor belt (604) can form a hole for material output on the conveyor belt (604), and the positive pressure air curtain (605) can be close to the upper surface of the material.

4. The apparatus as claimed in claim 1, characterized in that, The forming end (503) and the forming cylinder (502) are connected as a whole by threads, and the forming end (503) is integrally formed with a forming plate (504). The forming plate (504) has a bearing (505) at its center. The spiral stirring shaft (12) is located inside the forming cylinder (502). The left end of the spiral stirring shaft (12) extends out of the left end of the forming cylinder (502) and is connected to a stirring motor (11). A connection is provided between the spiral stirring shaft (12) and the forming cylinder (502). There is a bearing (505); the right end of the spiral stirring shaft (12) is inserted into the bearing (505) located at the center of the forming plate (504), and the forming plate (504) is provided with a plurality of forming holes that connect the inside and outside of the forming cylinder (502); the mixing assembly (4) is provided with a spiral stirring shaft (12), the right end of the spiral stirring shaft (12) is movably connected by the bearing (505), and the left end of the spiral stirring shaft (12) passes out from the mixing assembly (4) and is connected to a stirring motor (11).

5. The apparatus as described in claim 1 or 4, characterized in that, The spiral stirring shaft (12) is a dual-shaft spiral stirring shaft.

6. The apparatus as described in claim 1 or 4, characterized in that, The forming plate (504) is located at the right end of the cone, and the forming plate (504) is provided with a plurality of forming holes. The forming holes can compress the material into particles with a particle size ≤10cm or into sheets with a thickness of 1-10mm and a width of 10-50cm by the action of the spiral stirring shaft (12). The forming end (503) is used to achieve a sealing barrier between the stirring and homogenizing component (5) and the steam treatment component (6) by extrusion.

7. The apparatus as claimed in claim 1, characterized in that, The feeding unit includes an alkaline material tank (3), a manganese slag tank (1), and a belt conveyor assembly (2); the bottom of the alkaline material tank (3) is equipped with a weighing scale (301), and a conveying pipe (302) is provided between the weighing scale (301) and the material hopper (402), the conveying pipe (302) can convey the material weighed on the weighing scale (301) to the material hopper (402); a belt conveyor assembly (2) is provided between the manganese slag tank (1) and the crushing assembly (16), the belt conveyor assembly (2) 2) The material in the manganese slag tank (1) can be transported to the crushing component (16) for crushing; a belt conveyor component (2) is provided between the crushing component (16) and the material hopper (402), and the belt conveyor component (2) can transport the material crushed by the crushing component (16) to the material hopper (402); and / or the bottom of the steam treatment component (6) is provided with a support (610), and the support (610) is provided with bolt holes that run vertically through, and bolts (611) are matched in the bolt holes.

8. The apparatus as claimed in claim 1, characterized in that, The conveying assembly conveys the material from left to right within the steam treatment assembly (6) for a time between 1 and 15 hours.

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