Byproduct sodium acetate impurity removal device

Abstract

The utility model provides a byproduct sodium acetate impurity removal device, which belongs to the technical field of sodium acetate production, and comprises a filtering tank, a flocculation tank and an ultrafiltration tank which are sequentially communicated, a plurality of layers of filtering plates are detachably arranged in the filtering tank, the plurality of filtering plates are sequentially arranged along the vertical direction, and a preset distance is arranged between the adjacent filtering plates; a rotating paddle is arranged in the flocculation tank, a flocculation box is arranged on the flocculation tank, and the flocculation box is communicated with the flocculation tank; and a PTFE (Polytetrafluoroethylene) flat sheet membrane is arranged in the ultrafiltration tank. The filtering tank is used for carrying out primary filtration on large-particle impurities, the flocculation tank is used for carrying out secondary filtration on small-particle impurities, and the ultrafiltration tank is used for carrying out tertiary filtration on micro-particle impurities, so that the content of impurities such as suspended particles, organic matters and metal ions in a byproduct sodium acetate mixed solution (sodium acetate mother liquor) can be effectively reduced, the impurity removal rate is improved, and meanwhile, the production cost is reduced. And pollution and blockage of an ultrafiltration (PTFE) membrane can be effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of sodium acetate production, and particularly relates to an impurity removal device for by-product sodium acetate. Background Art

[0002] In the water treatment industry, sodium acetate trihydrate (also known as sodium acetate trihydrate) is usually used as an effective carbon source in the biochemical treatment system for wastewater purification. Because it has a single molecular formula and molecular structure and is easy to be utilized by microorganisms, it is often used as a carbon source to provide nutrients for the growth and metabolism of microorganisms in the sewage biochemical treatment system, improving the biodegradability of the biochemical denitrification and nitrogen removal process of sewage.

[0003] Sodium acetate trihydrate can be prepared from by-product sodium acetate (also known as sodium acetate mother liquor). By-product sodium acetate is a waste generated during the factory production process, which not only contains various salt substances, organic substances, but also has many heavy metal substances. It not only pollutes the environment but also causes waste of resources. Therefore, by-product sodium acetate is recycled. Through processes such as impurity removal and centrifugation, sodium acetate trihydrate is prepared for use in the water treatment industry. During the production and preparation process of by-product sodium acetate, first, by-product sodium acetate and water are mixed and dissolved with each other to form a by-product sodium acetate mixed solution. Then, after centrifugation, precipitation and other pretreatment of the by-product sodium acetate mixed solution, a filter is used to filter the sodium acetate liquid, and generally, an ultrafiltration (PTFE) membrane is used for filtration to remove impurities and impure substances therein.

[0004] However, due to the presence of various mixed impurities in the by-product sodium acetate mixed solution, such as large particle salt substances, large particle organic substances and metal ions, at present, the pretreatment impurity removal processes used for sodium acetate mother liquor, such as centrifugation and precipitation, cannot effectively remove suspended particles, organic substances and metal ions in the sodium acetate mother liquor, which easily causes pollution and blockage of the ultrafiltration (PTFE) membrane, resulting in low filtration efficiency and a high impurity content in the filtered mother liquor, and it cannot be used as a carbon source agent for sewage treatment. Summary of the Utility Model

[0005] Based on this, the utility model provides an impurity removal device for by-product sodium acetate to solve the technical problems existing in the prior art that the pretreatment impurity removal processes used for sodium acetate mother liquor, such as centrifugation and precipitation, cannot effectively remove suspended particles, organic substances and metal ions in the sodium acetate mother liquor, which easily causes pollution and blockage of the ultrafiltration (PTFE) membrane, resulting in low filtration efficiency and a high impurity content in the filtered mother liquor.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] An impurity removal device for by-product sodium acetate, comprising a filtration tank, a flocculation tank and an ultrafiltration tank connected in sequence.

[0008] A number of filter plates are detachably arranged in the filter tank. Vertically, the number of filter plates are arranged in sequence, and a preset distance is provided between adjacent filter plates;

[0009] A rotating paddle is arranged in the flocculation tank, and a flocculation box is arranged on the flocculation tank. The flocculation box is communicated with the flocculation tank;

[0010] A PTFE flat membrane is arranged in the ultrafiltration tank.

[0011] Preferably, a sedimentation tank is arranged at the bottom of the filter tank, and a reflux pipe is further arranged on the filter tank. One end of the reflux pipe is communicated with the sedimentation tank, and the other end of the reflux pipe extends to the top of the filter tank.

[0012] Preferably, there are three layers of filter plates, which are the first filter plate, the second filter plate and the third filter plate from top to bottom. A first filter screen is detachably arranged on the first filter plate, a second filter screen is detachably arranged on the second filter plate, and a third filter screen is detachably arranged on the third filter plate. The aperture of the first filter screen > the aperture of the second filter screen > the aperture of the third filter screen.

[0013] Preferably, an adsorption box is further arranged on the flocculation tank, and the adsorption box is communicated with the flocculation tank.

[0014] Preferably, a first sampling part is further arranged on the flocculation tank, and one end of the first sampling part extends into the flocculation tank.

[0015] Preferably, the first sampling part includes a first sampling pipe, a first extraction valve and a first sampling cup. One end of the first sampling pipe extends into the flocculation tank, the first extraction valve is arranged on the first sampling pipe, and the first sampling cup is arranged near the other end of the first sampling pipe.

[0016] Preferably, a second sampling part is further arranged on the ultrafiltration tank, and one end of the second sampling part extends into the ultrafiltration tank.

[0017] Preferably, an anti-flushing pipe is further arranged on the ultrafiltration tank. The anti-flushing pipe is arranged on the side far from the liquid inlet of the ultrafiltration tank. A three-way pipe is further arranged on the ultrafiltration tank. The first pipe of the three-way pipe is communicated with the bottom of the ultrafiltration tank. A second valve is arranged on the second pipe of the three-way pipe, and a third valve is arranged on the third pipe of the three-way pipe.

[0018] Compared with the prior art, the utility model has at least the following advantages:

[0019] The large-particle impurities are filtered at the first stage by the filtration tank, the small-particle impurities are filtered at the second stage by the flocculation tank, and the micro-particle impurities are filtered at the third stage by the ultrafiltration tank, which can effectively reduce the content of impurities such as suspended particles, organic matters and metal ions in the by-product sodium acetate mixed solution (sodium acetate mother liquor), improve the impurity removal rate, and at the same time, can also effectively avoid the fouling and blockage of the ultrafiltration (PTFE) membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the device for removing impurities from by-product sodium acetate.

[0021] Figure 2 It is a schematic diagram of the filtration tank.

[0022] Figure 3 It is a schematic diagram of the flocculation tank.

[0023] In the figure: filtration tank 100, filter plate 110, first filter plate 111, first filter screen 112, second filter plate 113, second filter screen 114, third filter plate 115, third filter screen 116, sedimentation tank 120, return pipe 130, flocculation tank 200, flocculation box 210, adsorption box 220, first sampling member 230, first sampling pipe 231, first extraction valve 232, first sampling cup 233, rotating paddle 240, ultrafiltration tank 300, PTFE flat membrane 310, second sampling member 320, backwash pipe 330, three-way pipe 340, second valve 341, third valve 342. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The following will further describe the technical solutions of the present invention with reference to the drawings of the embodiments of the present invention. The present invention is not limited to the following specific embodiments.

[0025] It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of the present patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] Please refer to Figure 1, A by-product sodium acetate impurity removal device, including a filter tank 100, a flocculation tank 200 and an ultrafiltration tank 300 connected in sequence;

[0027] A plurality of filter plates 110 are detachably arranged in the filter tank 100. Along the vertical direction, the plurality of filter plates 110 are arranged in sequence, and a preset distance is provided between adjacent filter plates 110. The liquid inlet of the filter tank 100 is located at the top of the filter tank 100, and the liquid outlet of the filter tank 100 is arranged on the side wall of the filter tank 100 and is located below the filter plate;

[0028] A rotating paddle 240 is arranged in the flocculation tank 200, and the rotating paddle 240 is driven to rotate by a motor. A flocculation box 210 is arranged on the flocculation tank 200. The flocculation box 210 is filled with a flocculant. The flocculation box 210 is communicated with the flocculation tank 200. The liquid inlet of the flocculation tank 200 is located on the side wall of the flocculation tank 200 and is close to the top of the flocculation tank 200. The liquid inlet of the flocculation tank 200 is communicated with the liquid outlet of the filter tank 100. The liquid outlet of the flocculation tank 200 is located on the side wall of the flocculation tank 200.

[0029] A PTFE flat membrane 310 is arranged in the ultrafiltration tank 300. The liquid inlet of the ultrafiltration tank 300 is located at the top of the ultrafiltration tank 300, and the liquid discharge port of the ultrafiltration tank 300 is located at the bottom of the ultrafiltration tank 300. The PTFE flat membrane 310 is made of a natural hydrophobic polytetrafluoroethylene polymer, has extremely excellent chemical compatibility, can withstand almost all organic solvents, and the material has the characteristics of strong hydrophobicity, non-adhesion and thermal stability, so it has strong anti-pollution ability and can be restored to performance only by flushing with water. It can remove most of the suspended solids, metal ions and organic substances in the sodium acetate mother liquor.

[0030] The specific working process is as follows:

[0031] The dissolving device dissolves and discharges the by - product sodium acetate mixed solution, which enters the filtering tank 100 from the liquid inlet of the filtering tank 100 and is discharged onto the filter plate 110. After being filtered by several layers of the filter plate 110, the large - particle impurities in the by - product sodium acetate mixed solution remain on the filter plate 110. The filtered by - product sodium acetate mixed solution (the first filtered solution) flows to the bottom of the filtering tank 100. The first filtered solution in the filtering tank 100 gradually increases and is discharged from the liquid outlet of the filtering tank 100, and is pumped into the flocculation tank 200 by a pump. When there is a certain amount of by - product sodium acetate mixed solution (the first filtered solution) in the flocculation tank 200, a flocculant is added into the flocculation tank 200 through the flocculation box 210. The motor is started, and the rotating paddle 240 is driven by the motor to rotate, so that the flocculant is evenly distributed in the by - product sodium acetate mixed solution (the first filtered solution). The flocculant can quickly agglomerate the suspended substances in the by - product sodium acetate mixed solution (the first filtered solution) and precipitate to the bottom of the flocculation tank 200. The upper layer is the by - product sodium acetate mixed solution (the second filtered solution). The by - product sodium acetate mixed solution (the second filtered solution) on the upper layer of the flocculation tank 200 is pumped out by a pump and discharged into the ultra - filtration tank 300 through the liquid inlet of the ultra - filtration tank 300, and the by - product sodium acetate mixed solution (the second filtered solution) is filtered by the PTFE flat membrane 310 in the ultra - filtration tank 300. After filtration, a by - product sodium acetate mixed solution (the third filtered solution) is formed and accumulates at the bottom of the ultra - filtration tank 300. The by - product sodium acetate mixed solution (the third filtered solution) is discharged from the liquid discharge port of the ultra - filtration tank 300 for the next technological step.

[0032] Achieved effects:

[0033] By sequentially introducing the by - product sodium acetate mixed solution into the filtering tank 100, the flocculation tank 200, and the ultra - filtration tank 300, the multi - layer filter plates in the filtering tank 100 can filter large - particle impurities, achieving primary filtration of large - particle impurities. At the same time, the undissolved sodium acetate crystals will remain on the filter plate. As the by - product sodium acetate mixed solution gradually flushes the filter plate, part of the sodium acetate will dissolve. While removing impurities, the dissolution of sodium acetate crystals is carried out. For part of the remaining sodium acetate crystals and impurities, the filter plate is disassembled, and the impurities and the remaining sodium acetate crystals are backfilled into the dissolving device for secondary dissolution;

[0034] Adding a flocculant in the flocculation tank 200 can quickly agglomerate the suspended substances in the by - product sodium acetate mixed solution (the first filtered solution), achieving secondary filtration of small - particle impurities;

[0035] The PTFE flat membrane 310 in the ultra - filtration tank 300 filters the micro - particle impurities in the by - product sodium acetate mixed solution (the second filtered solution), achieving tertiary filtration of micro - particle impurities;

[0036] The large particle impurities are filtered at the first stage by the filtration tank 100, the small particle impurities are filtered at the second stage by the flocculation tank 200, and the ultra-fine particle impurities are filtered at the third stage by the ultrafiltration tank 300, which can effectively reduce the content of impurities such as suspended particles, organic matters and metal ions in the by-product sodium acetate mixed solution (sodium acetate mother liquor), improve the impurity removal rate. At the same time, it can also effectively avoid the fouling and blockage of the ultrafiltration (PTFE) membrane.

[0037] As a further description, a settling tank 120 is provided at the bottom of the filtration tank 100, and a return pipe 130 is further provided on the filtration tank 100. One end of the return pipe 130 is communicated with the settling tank 120, and the other end of the return pipe 130 extends to the top of the filtration tank 100. Since the by-product sodium acetate mixed solution (the first filtration solution) contains small particle impurities, they will settle at the bottom of the filtration tank 100 and settle in the settling tank 120. After setting a preset time, the return pipe 130 is opened, and the by-product sodium acetate mixed solution (the first filtration solution) in the settling tank 120 is pumped by a pump body and returned to the liquid inlet of the filtration tank 100 at the top of the filtration tank 100 for impurity removal again, preventing more impurities from precipitating at the bottom of the filtration tank 100.

[0038] Further, the filter plate 110 is provided with three layers, namely a first filter plate 111, a second filter plate 113 and a third filter plate 115 from top to bottom. A first filter screen 112 is detachably arranged on the first filter plate 111, a second filter screen 114 is detachably arranged on the second filter plate 113, and a third filter screen 116 is detachably arranged on the third filter plate 115. The aperture of the first filter screen 112 > the aperture of the second filter screen 114 > the aperture of the third filter screen 116. To improve the filtration efficiency, at the same time, to avoid a large amount of impurities being filtered on the topmost filter plate while there are no impurities on the lower filter plates, by setting the first filter screen 112, the second filter screen 114 and the third filter screen 116, with the aperture of the first filter screen 112 > the aperture of the second filter screen 114 > the aperture of the third filter screen 116, since the aperture of the first filter screen 112 is the largest, it will filter impurities with a larger diameter, the second filter screen 114 filters impurities with a slightly smaller diameter, and the third filter screen 116 filters impurities with an even smaller diameter. The filtered impurities will be more evenly distributed on the first filter screen 112, the second filter screen 114 and the third filter screen 116, avoiding a large amount of impurities being filtered on the first filter screen 112 and clogging the first filter screen 112. For the filtered impurities, regularly remove the first filter plate 111, the second filter plate 113 and the third filter plate 115, and clean the impurities on the first filter screen 112, the second filter screen 114 and the third filter screen 116. Moreover, when it is found that the first filter screen 112, the second filter screen 114 and the third filter screen 116 are damaged, replace the first filter screen 112 or the second filter screen 114 or the third filter screen 116.

[0039] Specifically, an opening is provided on the filtration tank 100, and the opening is sealed by a sealing plate. A clamping groove is provided in the filtration tank 100. The first filter plate 111, the second filter plate 113 and the third filter plate 115 are clamped in the clamping groove. When disassembling the filter plate, open the sealing plate and take out the filter plate from the opening for cleaning.

[0040] Preferably, an adsorption box 220 is further provided on the flocculation tank 200. The adsorption box 220 is filled with an adsorbent, and the adsorption box 220 is communicated with the flocculation tank 200. In order to accelerate the impurity filtration rate of the by-product sodium acetate mixed solution (the first filtered solution) entering the flocculation tank 200, while the impurities are coagulated by the flocculant in the flocculation box 210, open the adsorption box 220, add the adsorbent into the flocculation tank 200, and stir through the rotating paddle 240 to coagulate the impurities in the by-product sodium acetate mixed solution (the first filtered solution). By adding the adsorbent, the impurity coagulation efficiency in the by-product sodium acetate mixed solution (the first filtered solution) can be greatly improved, and the impurities in the by-product sodium acetate mixed solution (the first filtered solution) can be reduced.

[0041] Further, in order to detect the purity of the by-product sodium acetate mixed solution (the second filtered solution) and prevent excessive impurities in the by-product sodium acetate mixed solution (the second filtered solution) from clogging the PTFE flat membrane 310, a first sampling member 230 is further provided on the flocculation tank 200. One end of the first sampling member 230 extends into the flocculation tank 200, and the first sampling member 230 is arranged at the top of the flocculation tank 200. After adding a flocculant and an adsorbent to the by-product sodium acetate mixed solution (the first filtered solution), it is stirred for a preset time and then left to stand. The impurities in the by-product sodium acetate mixed solution (the first filtered solution) coagulate and precipitate at the bottom of the flocculation tank 200, and the upper layer is the by-product sodium acetate mixed solution (the second filtered solution) after impurity removal. The first sampling member 230 regularly extracts the by-product sodium acetate mixed solution (the second filtered solution) and detects it. If the purity of the by-product sodium acetate mixed solution (the second filtered solution) meets the standard, the by-product sodium acetate mixed solution (the second filtered solution) is pumped out by a pump body and enters the ultrafiltration tank 300 through the liquid inlet of the ultrafiltration tank 300. If the purity of the by-product sodium acetate mixed solution (the second filtered solution) does not meet the standard, a flocculant and an adsorbent are added to the flocculation tank 200 again.

[0042] Specifically, a waste discharge pipe is provided at the bottom of the flocculation tank 200. The waste discharge pipe is opened to discharge the impurities coagulated at the bottom of the flocculation tank 200.

[0043] Specifically, the first sampling member 230 includes a first sampling pipe 231, a first extraction valve 232 and a first sampling cup 233. One end of the first sampling pipe 231 extends into the flocculation tank 200, the first extraction valve 232 is arranged on the first sampling pipe 231, and the first sampling cup 233 is arranged near the other end of the first sampling pipe 231. When it is necessary to detect the purity of the by-product sodium acetate mixed solution (the second filtered solution), the first extraction valve 232 is opened, and the by-product sodium acetate mixed solution (the second filtered solution) in the flocculation tank 200 is extracted through the first sampling pipe 231 and discharged into the first sampling cup 233, and then sent to the testing room for testing.

[0044] Furthermore, in order to detect the purity of the by-product sodium acetate mixed solution (the third filtered solution) and improve the purity of sodium acetate trihydrate produced in the subsequent process, a second sampling piece 320 is also provided on the ultrafiltration tank 300, and one end of the second sampling piece 320 extends into the ultrafiltration tank 300. The second sampling piece 320 has the same structure as the first sampling piece 230. The by-product sodium acetate mixed solution (the second filtered solution) enters the PTFE flat membrane 310 in the ultrafiltration tank 300. After being filtered by the PTFE flat membrane 310, the filtered by-product sodium acetate mixed solution (the third filtered solution) converges at the bottom of the ultrafiltration tank 300. The second sampling piece 320 regularly extracts the by-product sodium acetate mixed solution (the third filtered solution) and detects it; if the purity of the by-product sodium acetate mixed solution (the third filtered solution) meets the standard, the by-product sodium acetate mixed solution (the third filtered solution) is extracted through the pump body to enter the next process step; if the purity of the by-product sodium acetate mixed solution (the third filtered solution) does not meet the standard, it is refluxed for filtration again, or the PTFE flat membrane 310 is detected to see if it is damaged.

[0045] Specifically, the second sampling member 320 includes a second sampling tube, a second extraction valve and a second sampling cup, one end of the second sampling tube extends into the ultrafiltration tank 300, the second extraction valve is arranged on the second sampling tube, and the second sampling cup is arranged near the other end of the second sampling tube. When it is necessary to detect the purity of the by-product sodium acetate mixed solution (third filtered solution), the second extraction valve is opened, the by-product sodium acetate mixed solution (third filtered solution) in the ultrafiltration tank 300 is extracted through the second sampling tube, and discharged into the second sampling cup, and sent to the detection room for detection.

[0046] Furthermore, when more impurities are attached to the PTFE flat membrane 310, the filtering effect of the PTFE flat membrane 310 is reduced. Therefore, a backwashing pipe 330 is also provided on the ultrafiltration tank 300. The backwashing pipe 330 is arranged on a side away from the liquid inlet of the ultrafiltration tank 300. The backwashing pipe 330 is opened, and the connecting pipe between the PTFE flat membrane 310 in the ultrafiltration tank 300 and the flocculation tank 200 is disconnected, so that the PTFE flat membrane 310 in the ultrafiltration tank 300 is in an internal circulation, and clean water enters the PTFE flat membrane 310. Since the flow direction of the clean water is opposite to the flow direction of the by-product sodium acetate mixed solution (the third filtered solution), the impurities on the PTFE flat membrane 310 will be washed to the bottom of the ultrafiltration tank 300 under the action of backwashing.

[0047] A tee pipe 340 is further provided on the ultrafiltration tank 300. The first pipe of the tee pipe 340 is communicated with the bottom of the ultrafiltration tank 300. A second valve 341 is provided on the second pipe of the tee pipe 340, and a third valve 342 is provided on the third pipe of the tee pipe 340. When the by-product sodium acetate mixed solution (the third filtration solution) remains in the ultrafiltration tank 300, the second valve 341 is opened, and the by-product sodium acetate mixed solution (the third filtration solution) is pumped through a pump body; after backwashing, when the impurity solution remains in the ultrafiltration tank 300, the third valve 342 is opened, the second valve 341 is closed, and the impurity solution remaining in the ultrafiltration tank 300 is discharged.

[0048] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A by-product sodium acetate impurity removal device, characterized in that: It includes a filter tank, a flocculation tank and an ultrafiltration tank which are connected in sequence; Several layers of filter plates are detachably arranged in the filter tank, and the filter plates are arranged in sequence along the vertical direction, and a preset distance is set between adjacent filter plates; The flocculation tank is provided with a rotating paddle, the flocculation tank is provided with a flocculation box, and the flocculation box is connected to the flocculation tank; A PTFE flat membrane is arranged in the ultrafiltration tank.

2. The by-product sodium acetate impurity removal device as claimed in claim 1, characterized in that: A sedimentation tank is arranged at the bottom of the filter tank, and a return pipe is also arranged on the filter tank. One end of the return pipe is connected to the sedimentation tank, and the other end of the return pipe extends to the top of the filter tank.

3. The by-product sodium acetate impurity removal device as claimed in claim 1, characterized in that: The filter plate is provided with three layers, which are respectively the first filter plate, the second filter plate and the third filter plate from top to bottom. The first filter plate is detachably provided with a first filter screen, the second filter plate is detachably provided with a second filter screen, and the third filter plate is detachably provided with a third filter screen. The aperture size of the first filter screen is greater than the aperture size of the second filter screen and greater than the aperture size of the third filter screen.

4. The by-product sodium acetate impurity removal device as claimed in claim 1, characterized in that: The flocculation tank is also provided with an adsorption box, and the adsorption box is communicated with the flocculation tank.

5. The by-product sodium acetate impurity removal device as claimed in claim 1, characterized in that: The flocculation tank is also provided with a first sampling piece, and one end of the first sampling piece extends into the flocculation tank.

6. The by-product sodium acetate impurity removal device as claimed in claim 5, characterized in that: The first sampling member includes a first sampling tube, a first extraction valve and a first sampling cup. One end of the first sampling tube extends into the flocculation tank. The first extraction valve is arranged on the first sampling tube. The first sampling cup is arranged near the other end of the first sampling tube.

7. The by-product sodium acetate impurity removal device as claimed in claim 1, characterized in that: The ultrafiltration tank is also provided with a second sampling piece, and one end of the second sampling piece extends into the ultrafiltration tank.

8. The by-product sodium acetate impurity removal device as claimed in claim 1, characterized in that: The ultrafiltration tank is also provided with a backwash pipe, which is arranged on a side away from the liquid inlet of the ultrafiltration tank. The ultrafiltration tank is also provided with a three-way pipe, the first tube of the three-way pipe is connected to the bottom of the ultrafiltration tank, the second tube of the three-way pipe is provided with a second valve, and the third tube of the three-way pipe is provided with a third valve.

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