Absorption, impurity removal and quality improvement device for byproduct hydrochloric acid in potassium sulfate production

Abstract

The utility model relates to the technical field of hydrochloric acid solution filtering devices, in particular to a potassium sulfate production byproduct hydrochloric acid absorption, impurity removal and quality improvement device. Comprising a box body, liquid inlets are symmetrically formed in the two sides of the box body, a first filtering piece and a drainage plate are sequentially installed on the box body and located below the liquid inlets, a liquid outlet of the drainage plate is communicated with at least one filtering cylinder, a second filtering piece is arranged in the filtering cylinder, and the first filtering piece and the second filtering piece are arranged in the box body. A cleaning assembly for scraping impurities on the inner surface of the second filter part is arranged above the filter cartridge; through the structural design of the first filtering piece, a hydrochloric acid solution can be prevented from directly impacting the coarse filtering cloth, internal solid impurities are effectively removed through twice filtering, the quality of the solution is improved, and through the design of the cleaning assembly, a fine filtering part can be scraped, blockage is avoided, the maintenance frequency is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrochloric acid solution filtering devices, in particular to a device for absorbing, removing impurities and improving the quality of by-product hydrochloric acid in potassium sulfate production. Background Technique

[0002] During the production process of potassium sulfate, a certain amount of by-product hydrochloric acid will be generated. After the hydrochloric acid is purified by air stripping, a hydrochloric acid solution is formed. However, the concentration of the hydrochloric acid at this time is often still relatively low and cannot meet the use in some occasions. To this end, at present, the hydrochloric acid solution is filtered to remove internal solid impurities, and then concentrated again to improve the overall quality. However, the existing filters cannot meet the filtering requirements. The hydrochloric acid solution in the liquid inlet directly contacts the filtering part, resulting in direct scouring, which is easy to cause damage to the filtering parts. Moreover, for the secondary fine filtering part, blockage is likely to occur, resulting in frequent maintenance and affecting production. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a device for absorbing, removing impurities and improving the quality of by-product hydrochloric acid in potassium sulfate production in view of the above-mentioned technical deficiencies. Through the structural design of the first filter element, it is possible to avoid the direct impact of the hydrochloric acid solution on the coarse filter cloth. At the same time, through two-stage filtration, internal solid impurities can be effectively removed, the solution quality can be improved, and the design of the cleaning component can perform scraping operations on the fine filtration part, avoid blockage, reduce the number of maintenance times, and improve production efficiency.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0005] A box body, on both sides of the box body are symmetrically arranged liquid inlets. Below the liquid inlets, a first filter element and a diversion plate are successively installed on the box body. The liquid outlet of the diversion plate is communicated with at least one filter cylinder, and a second filter element is arranged in the filter cylinder. Above the filter cylinder, a cleaning component for scraping impurities on the inner surface of the second filter element is provided.

[0006] Preferably, a receiving cavity communicated with the liquid inlets is provided at the top of the box body.

[0007] Preferably, liquid storage tanks are arranged on both sides of the first filter element, and inclined filter plates are arranged in the liquid storage tanks. Above the liquid storage tanks, baffles are provided.

[0008] Preferably, an overflow channel is provided in the middle of the first filter element, and an arc-shaped filter surface is provided on the overflow channel.

[0009] Preferably, an overflow pipe is provided on the first filter element.

[0010] Preferably, the cleaning component includes a driving shaft and a displacement plate; the driving shaft is rotatably connected above the filter cylinder, with a scraping member provided at one end and a gear provided at the other end; both ends of the displacement plate are slidably connected above the filter cylinder, and a rack meshing with the gear is provided on one side.

[0011] Preferably, a detachable impurity storage cylinder is provided below the filter cylinder.

[0012] Preferably, a shielding member is provided at the inlet of the impurity storage cylinder.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The hydrochloric acid solution flows to the baffle of the first filter element through the liquid inlet, and then is drained into the liquid storage tank through the baffle for primary filtration, effectively avoiding the damage of the coarse filter cloth caused by traditional direct impact, improving the structural stability, and dividing the primary filtration into multiple filtration areas formed by the liquid storage tanks, which is convenient for later maintenance and replacement of the specified area without replacing the whole, reducing the maintenance cost;

[0015] 2. The hydrochloric acid solution after primary filtration is drained into the filter cylinder through the drain plate and filtered again through the second filter element, which can effectively improve the overall filtration quality. At the same time, the cleaning component is used to regularly scrape the second filter element to scrape off the solid impurities adhered to the surface, and the maintenance operation can be completed without disassembling the machine to ensure normal production;

[0016] 3. By reciprocating displacement of the displacement plate, the scraping member is driven to rotate reciprocally, so as to realize the cleaning operation of the second filter element. At the same time, an impurity storage cylinder is installed to collect the fallen solid impurities and prevent secondary adhesion, improving the cleaning efficiency;

[0017] 4. The structural design of the overflow channel can, when the solution treatment capacity is reduced due to partial failure of the liquid storage tank, divert the solution and temporarily filter it through the filter, avoiding the failure of the overall filtration structure, so that the maintenance time can be flexibly selected according to needs, and when the treatment capacity is large, the overflow channel can be used for sharing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the hydrochloric acid absorption, impurity removal and quality improvement device for by - product hydrochloric acid in potassium sulfate production;

[0019] Figure 2 It is a schematic diagram of the internal structure of the hydrochloric acid absorption, impurity removal and quality improvement device for by - product hydrochloric acid in potassium sulfate production;

[0020] Figure 3 It is the front view inside the box body;

[0021] Figure 4Schematic diagram of the first filter structure;

[0022] Figure 5 Schematic diagram of the drainage plate structure;

[0023] Figure 6 Schematic diagram of the cleaning component structure;

[0024] Figure 7 Cross-sectional view of the impurity storage cylinder;

[0025] Figure 8 Schematic diagram of the installation of the second filter.

[0026] In the figure: 1, the box body; 2, the first filter; 3, the drainage plate; 4, the filter cylinder; 5, the second filter; 6, the cleaning component; 101, the liquid inlet; 102, the accommodation cavity; 201, the liquid storage tank; 202, the filter plate; 203, the baffle; 204, the overflow channel; 205, the filter surface; 206, the overflow pipe; 401, the impurity storage cylinder; 402, the shielding member; 601, the driving shaft; 602, the displacement plate; 603, the scraping member; 604, the gear; 605, the rack. Specific embodiments

[0027] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0028] Specific embodiment one: In combination with Figure 1-8 As shown, the hydrochloric acid absorption, impurity removal and quality improvement device for by-products in potassium sulfate production includes: a box body 1, liquid inlets 101 are symmetrically arranged on both sides of the box body 1. Below the liquid inlets 101, a first filter 2 and a drainage plate 3 are successively installed on the box body 1 from top to bottom. The liquid outlet of the drainage plate 3 is communicated with at least one filter cylinder 4, and a second filter 5 is installed inside the filter cylinder 4. Above the filter cylinder 4, there is a cleaning component 6 for scraping impurities on the inner surface of the second filter 5;

[0029] The hydrochloric acid solution flows into the filtration area in the first filter 2 through the liquid inlet 101. After primary coarse filtration, the solution gathers through the drainage plate 3 and then enters the filter cylinder 4 from the liquid outlet. After fine filtration by the second filter 5, high-quality hydrochloric acid solution is produced, removing internal solid impurities, facilitating subsequent concentration and re-purification operations. At the same time, during operation, the cleaning component 6 can be used to clean the fine filtration area to prevent blockage, avoid shutdown operations, effectively extend the operation time, and improve the processing efficiency.

[0030] Preferred embodiment, in combination with Figure 2 and Figure 3 As shown, a rectangular receiving cavity 102 is machined at the top of the box body 1. At the same time, the receiving cavity 102 communicates with the liquid inlet ports 101 arranged on both sides. The hydrochloric acid solution entering the box body 1 is pre-stored in the receiving cavity 102, providing a temporary storage space to avoid the solution accumulating in the pipeline. At the same time, corrosion-resistant control valves can be installed at the liquid inlet ports 101 to open or close the valve openings and control the opening amount.

[0031] Preferred embodiment, in combination with Figure 4 As shown, liquid storage tanks 201 are arranged on both sides of the first filter element 2, and inclined filter plates 202 are provided in the liquid storage tanks 201. The inclined direction of the filter plate 202 on the left side is high on the left and low on the right, and the one on the right is high on the right and low on the left. This allows the solution to flow from the baffle 203 and then from the higher part to the lower part of the filter plate 202, facilitating filtration. At the same time, the design of the baffle 203 can prevent the solution flowing out of the liquid inlet port 101 from directly scouring the filter plate 202, extending its service life; among them, the filtering surface of the filter plate 202 can be composed of coarse filter cloth.

[0032] Preferred embodiment, in combination with Figure 3 and Figure 4 As shown, an overflow channel 204 is provided in the middle of the first filter element 2. The liquid outlet of the overflow channel 204 has an arc-shaped filtering surface 205, which can effectively increase the filtering area. When the filter plate 202 in the liquid storage tank 201 becomes partially ineffective after long-term use, the excess solution can be diverted for filtration, so that shutdown operations can be carried out as needed without the need for overall replacement, reducing the maintenance cost. When the solution processing volume is large, the filter plate 202 and the filtering surface 205 can work together to improve the processing efficiency.

[0033] Preferred embodiment, in combination with Figure 4 As shown, an overflow pipe 206 is provided on the first filter element 2. The overflow pipe 206 has a certain height and is lower than the edge height of the first filter element 2. It is connected to the external pipeline through the overflow pipe 206. When an overflow phenomenon occurs, it is convenient to remind the staff of the internal filtering situation, such as excessive liquid inlet volume or solution accumulation and overflow caused by internal blockage.

[0034] Preferred embodiment, in combination with Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, the cleaning component 6 includes a driving shaft 601 and a displacement plate 602; a hydraulic cylinder is installed at the front end of the box body 1, and the push rod of the hydraulic cylinder is fixedly connected to one end of the displacement plate 602. The upper part of the driving shaft 601 is rotationally connected to the upper part of the filter cylinder 4, a scraping member 603 is installed at the bottom end, and a gear 604 is installed at the top end; the cross-section of the displacement plate 602 is a rectangular structure, and both ends are slidably connected to the upper part of the filter cylinder 4. A rack 605 meshing with the gear 604 is installed in the middle of the displacement plate 602. By the telescopic movement of the hydraulic cylinder, the displacement plate 602 is driven to reciprocate, so as to realize the rotational drive of the scraping member 603 and complete the cleaning operation of the inner surface of the second filter member 5, reducing the blockage situation; wherein, the scraping member 603 can adopt the structure form of a scraper or a corrosion-resistant brush body structure.

[0035] In a preferred embodiment, in combination with Figure 5 and Figure 7 As shown, a detachable impurity storage cylinder 401 is provided below the filter cylinder 4. After the scraping member 603 scrapes the solid impurities from the inner surface, the impurities can be precipitated in the impurity storage cylinder 401 by the gravity of the impurities, avoiding the situation of secondary adhesion.

[0036] In a preferred embodiment, in combination with Figure 7 As shown, a shielding member 402 is provided at the inlet of the impurity storage cylinder 401. The shielding member 402 is in the shape of a flat cone, and the bottom diameter is smaller than the inner diameter of the liquid inlet of the impurity storage cylinder 401, which can prevent the solution from impacting the inside of the impurity storage cylinder 401 and causing the impurities to float, improving the stability. Specific Embodiment 2

[0038] In combination with Figure 5 and Figure 7 As shown, an external thread is machined on the upper part of the impurity storage cylinder 401, and an internal thread is machined at the bottom of the filter cylinder 4. The installation and disassembly are realized through the threaded connection of the two.

[0039] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for absorbing, removing impurities and improving the quality of by-product hydrochloric acid in potassium sulfate production, characterized in that: include: A box body (1), wherein liquid inlets (101) are symmetrically arranged on both sides of the box body (1), and a first filter element (2) and a guide plate (3) are sequentially mounted on the box body (1) below the liquid inlet (101), the liquid outlet of the guide plate (3) is connected to at least one filter cartridge (4), and a second filter element (5) is arranged inside the filter cartridge (4), and a cleaning component (6) for scraping impurities on the inner surface of the second filter element (5) is arranged above the filter cartridge (4).

2. The device for absorbing, removing impurities and improving the quality of by-product hydrochloric acid in potassium sulfate production according to claim 1, characterized in that: The top of the box body (1) is provided with a receiving cavity (102) which is in communication with the liquid inlet (101).

3. The device for absorbing, removing impurities and upgrading the by-product hydrochloric acid produced by potassium sulfate production according to claim 1, characterized in that: Liquid storage tanks (201) are arranged on both sides of the first filter element (2), and an inclined filter plate (202) is provided in the liquid storage tank (201), and a baffle (203) is provided above the liquid storage tank (201).

4. The device for absorbing, removing impurities and upgrading the by-product hydrochloric acid produced by potassium sulfate production according to claim 3, characterized in that: An overflow channel (204) is provided in the middle of the first filter element (2), and an arc-shaped filtering surface (205) is provided on the overflow channel (204).

5. The device for absorbing, removing impurities and improving the quality of by-product hydrochloric acid in potassium sulfate production according to claim 4, characterized in that: An overflow pipe (206) is provided on the first filter element (2).

6. The device for absorbing, removing impurities and upgrading the by-product hydrochloric acid produced by potassium sulfate production according to claim 1, characterized in that: The cleaning assembly (6) comprises a driving shaft (601) and a displacement plate (602); the driving shaft (601) is connected to the top of the filter cartridge (4) via a rotating shaft, one end of which is provided with a scraper (603) and the other end of which is provided with a gear (604); both ends of the displacement plate (602) are slidably connected to the top of the filter cartridge (4), and one side of the displacement plate is provided with a rack (605) meshing with the gear (604).

7. The device for absorbing, removing impurities and upgrading the by-product hydrochloric acid produced by potassium sulfate production according to claim 6, characterized in that: A detachable debris storage cylinder (401) is provided below the filter cylinder (4).

8. The device for absorbing, removing impurities and upgrading the by-product hydrochloric acid produced by potassium sulfate production according to claim 7, characterized in that: A shielding member (402) is provided at the inlet of the storage barrel (401).

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