Water treatment device in anhydrous manganese chloride production

Abstract

The utility model belongs to anhydrous manganese chloride production technical field discloses a kind of water treatment devices in anhydrous manganese chloride production, including the reaction kettle of sequentially intercommunication, impurity removal kettle, plate-frame filter device, concentrator, crystallization kettle, centrifuge, drying machine composition's production line;The discharge port of each production device is also respectively communicated to wastewater treatment device;The gas outlet of reaction kettle is communicated to water scrubber, and the water outlet of water scrubber is communicated to the feed inlet of reaction kettle;The gas outlet of concentrator and drying machine is all communicated to condensing device, and the water outlet of condensing device is communicated to the water inlet of water scrubber;The liquid outlet of centrifuge is also communicated to reaction kettle;Wastewater treatment device includes sequentially intercommunication's neutralization tank, sedimentation tank, filter press and RO device, and the clean water outlet of RO device is communicated to the feed inlet of reaction kettle.The utility model makes that production water realizes cyclic use, reduces enterprise economic burden, realizes clean production, environmental protection safety.

Description

Technical Field

[0001] This utility model relates to the field of manganese chloride production technology, specifically to a water treatment device in the production of anhydrous manganese chloride. Background Technology

[0002] In existing technologies, regardless of the production method used, the production of anhydrous manganese chloride uses a large amount of water. Although the water consumption is relatively small when using manganese carbonate and hydrochloric acid to harden anhydrous manganese chloride, a significant amount of water is still used or generated in processes such as dilution, cleaning, waste gas treatment, concentration, separation, and drying. While some of this water can be reused in the previous processes, most of it cannot be directly reused because its impurity content is relatively low. Although direct discharge does not pose a significant hazard, it still wastes water resources and seriously affects economic benefits. Therefore, it is necessary to rationally plan the water and wastewater treatment in production to ensure environmental safety and reduce water waste. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a water treatment device for the production of anhydrous manganese chloride, which overcomes the defects of the prior art, enables the recycling of production water, reduces the economic burden on enterprises, and achieves clean production, environmental protection and safety.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A water treatment device for anhydrous manganese chloride production includes a production line consisting of a reactor, a purification reactor, a plate and frame filter, a concentrator, a crystallizer, a centrifuge, and a dryer, which are connected in sequence by pipes, pumps, and valves. The outlets of the reactor, purification reactor, plate and frame filter, concentrator, crystallizer, centrifuge, and dryer are also connected to a wastewater treatment device. The gas outlet of the reactor is connected to a water washing tower, and the water outlet of the water washing tower is connected to the feed inlet of the reactor. The gas outlets of the concentrator and the dryer are both connected to a condensation device, and the water outlet of the condensation device is connected to the water inlet of the water washing tower. The liquid outlet of the centrifuge is also connected to the reactor. The wastewater treatment device includes a neutralization tank, a sedimentation tank, a filter press, and an RO (reverse osmosis) device, which are connected in sequence by pipes, pumps, and valves. The clean water outlet of the RO device is connected to the feed inlet of the reactor.

[0006] Preferably, the water washing tower is a spray tower. Model LSY-LT-1500, provided by Weifang Lvsiyuan Environmental Protection Equipment Co., Ltd.

[0007] Preferably, the condensing device is a spiral plate condenser, model LXB-1500, provided by Weifang Hengfang Machinery Equipment Co., Ltd.

[0008] Preferably, the neutralization tank is a reaction vessel equipped with a stirring device and a pH meter. Model KDE-S-1000L, supplied by ETE-DL CO.,LTD.

[0009] Preferably, the sedimentation tank is a Lamella inclined plate sedimentation tank, model VMC-5, provided by Jiangsu Kangtai Environmental Protection Co., Ltd.

[0010] Preferably, the filter press is a 1500-type programmable automatic plate filter press. Provided by Yuzhou Jiuzhou Filter Press Equipment Co., Ltd.

[0011] Preferably, the RO device is an RO reverse osmosis device. Model number RO-4500-50HZ, manufactured by Shanghai Aize Industrial (agent).

[0012] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0013] This invention achieves the recycling of production water by reusing water from waste gas treatment, condensing and reusing steam distilled from concentrators and dryers for waste gas treatment, and treating and reusing water used for cleaning reactors and mother liquor separated from centrifuges through a wastewater treatment device. This reduces the economic burden on enterprises and achieves clean production, environmental protection, and safety. Attached Figure Description

[0014] Figure 1 This is a flowchart of an embodiment of the present utility model. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] like Figure 1 As shown, a water treatment device for anhydrous manganese chloride production includes a production line consisting of a reactor, a purification reactor, a plate and frame filter, a concentrator, a crystallizer, a centrifuge, and a dryer, which are connected in sequence by pipes, pumps, and valves. The outlets of the reactor, purification reactor, plate and frame filter, concentrator, crystallizer, centrifuge, and dryer are also connected to a wastewater treatment device. The gas outlet of the reactor is connected to a water washing tower, and the water outlet of the water washing tower is connected to the feed inlet of the reactor. The gas outlets of the concentrator and the dryer are both connected to a condensation device, and the water outlet of the condensation device is connected to the water inlet of the water washing tower. The liquid outlet of the centrifuge is also connected to the reactor. The wastewater treatment device includes a neutralization tank, a sedimentation tank, a filter press, and an RO device, which are connected in sequence by pipes, pumps, and valves. The clean water outlet of the RO device is connected to the feed inlet of the reactor.

[0017] In practical applications, when manganese carbonate reacts with hydrochloric acid to produce anhydrous manganese chloride, the concentrated hydrochloric acid needs to be diluted to a concentration of 18-20% (to reduce the intensity of the reaction and prevent HCl volatilization), and a slight excess of hydrochloric acid is required. The reaction temperature is controlled at 50-60℃, and the reaction time is 2-3 hours. The exhaust gas produced during this process mainly consists of carbon dioxide and HCl, which are discharged into a water washing tower through the exhaust port. The HCl is absorbed by water and reused in the reaction vessel to dilute the concentrated hydrochloric acid. The carbon dioxide is not absorbed and is discharged from the exhaust port of the water washing tower. After impurity removal, the reacted material enters a plate and frame filter press for filtration before entering a concentrator. Because concentrators generally employ multiple... The process involves vacuum concentration at 60-70℃ and a vacuum level of -0.08 to -0.09 MPa, causing water to evaporate as steam. This steam is then condensed and reused in a water washing tower. The concentrated material is crystallized in a crystallizer and then separated by a centrifuge. The crystals are dried in a dryer (180-200℃) to obtain anhydrous manganese chloride. The steam from the dryer is also condensed and reused in the water washing tower. The mother liquor obtained from the centrifuge separation is either reused in the reaction vessel or treated in the neutralization tank of a wastewater treatment plant, depending on production needs.

[0018] Washing water from the production line or mother liquor from the centrifuge enters the neutralization tank. Alkaline agents (such as calcium hydroxide) are added to adjust the pH to neutral, which will generate hydroxide precipitate. Flocculants (such as polyaluminum chloride) are then added for flocculation. The mixture then enters the sedimentation tank for sedimentation. The activated sludge and water are then separated by a filter press. The water enters the RO (reverse osmosis) unit for further treatment. The resulting clean water can be reused in the reactor to clean each piece of equipment on the production line. (If the water concentration is high after washing some equipment, it can be discharged directly into the neutralization tank of the wastewater treatment unit through the outlet of that equipment. When the concentration of the washing water decreases, the outlet is closed, allowing the washing water to continue rinsing subsequent equipment.) The resulting concentrated liquid is evaporated and crystallized before being disposed of in a harmless manner.

[0019] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A water treatment device for use in the production of anhydrous manganese chloride, characterized by: The production line comprises a reactor, a purification vessel, a plate and frame filter, a concentrator, a crystallizer, a centrifuge, and a dryer, which are connected in sequence via pipes, pumps, and valves. The outlets of the reactor, purification vessel, plate and frame filter, concentrator, crystallizer, centrifuge, and dryer are also connected to a wastewater treatment device. The gas outlet of the reactor is connected to a water washing tower, and the water outlet of the water washing tower is connected to the feed inlet of the reactor. The gas outlets of the concentrator and dryer are both connected to a condensation device, and the water outlet of the condensation device is connected to the water inlet of the water washing tower. The liquid outlet of the centrifuge is also connected to the reactor. The wastewater treatment device includes a neutralization tank, a sedimentation tank, a filter press, and an RO device, which are connected in sequence via pipes, pumps, and valves. The clean water outlet of the RO device is connected to the feed inlet of the reactor.

2. The water treatment device for producing anhydrous manganese chloride without water according to claim 1, characterized by: The water washing tower is a spray tower.

3. The water treatment device for producing anhydrous manganese chloride without water according to claim 1, characterized by: The condensation device is a spiral plate condenser.

4. The water treatment device for anhydrous manganese chloride production as described in claim 1, characterized in that: The neutralization tank is a reaction tank equipped with a stirring device and a pH meter.

5. The water treatment device for producing anhydrous manganese chloride without water according to claim 1, wherein: The sedimentation tank is a Lamella inclined plate sedimentation tank.

6. The water treatment device for producing anhydrous manganese chloride without water according to claim 1, wherein: The filter press is a 1500-type programmable automatic plate filter press.

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