Device for separating sodium acetate trihydrate from byproduct sodium acetate

Abstract

The utility model provides a device for separating sodium acetate trihydrate from byproduct sodium acetate, which belongs to the technical field of sodium acetate preparation, and comprises a first tower body, a second tower body and a third tower body, a first mother liquor pipe, a first mixed extraction pipe, a first extraction liquid outlet pipe and a first mother liquor outlet pipe are arranged on the first tower body; a second sieve plate is arranged in the second tower body, and a second mother liquor pipe, a second mixed extraction pipe, a second extraction liquid outlet pipe and a second mother liquor outlet pipe are arranged on the second tower body; the extraction liquid return tank is communicated with the first extraction liquid outlet pipe and the second extraction liquid outlet pipe; and the finished material tank is communicated with the second mother liquid outlet pipe. And the efficiency of purifying sodium acetate trihydrate from the byproduct sodium acetate is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sodium acetate preparation, and particularly relates to a device for separating trisodium acetate trihydrate from by-product sodium acetate. Background Art

[0002] In the water treatment industry, trisodium 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 process of sewage.

[0003] Trisodium acetate trihydrate can be prepared from by-product sodium acetate (also known as sodium acetate mother liquor), and 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, the by-product sodium acetate is recycled, and trisodium acetate trihydrate is prepared through processes such as impurity removal, centrifugation, evaporation, and crystallization for use in the water treatment industry.

[0004] However, when purifying trisodium acetate trihydrate from by-product sodium acetate, the purified by-product sodium acetate still contains a relatively large amount of trisodium acetate trihydrate in the impurities, resulting in a low purification efficiency of trisodium acetate trihydrate. Summary of the Utility Model

[0005] Based on this, the utility model provides a device for separating trisodium acetate trihydrate from by-product sodium acetate to solve the technical problem existing in the prior art that when purifying trisodium acetate trihydrate from by-product sodium acetate, the purified by-product sodium acetate still contains a relatively large amount of trisodium acetate trihydrate in the impurities, resulting in a low purification efficiency of trisodium acetate trihydrate.

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

[0007] A device for separating trisodium acetate trihydrate from by-product sodium acetate includes a first tower body, a first sieve plate is arranged inside the first tower body, a first mother liquor pipe, a first extraction feed pipe, a first extraction liquid pipe and a first mother liquor discharge pipe are arranged on the first tower body, the first extraction feed pipe is located below the first mother liquor pipe, the first extraction liquid pipe is located at the top of the first tower body, and the first mother liquor discharge pipe is located at the bottom of the first tower body;

[0008] The second tower body is provided with a second sieve plate inside. A second mother liquor pipe, a second extraction feed pipe, a second extraction liquid discharge pipe and a second mother liquor discharge pipe are arranged on the second tower body. The second mother liquor pipe is communicated with the first mother liquor discharge pipe. The second extraction feed pipe is located below the second mother liquor pipe. The second extraction liquid discharge pipe is located at the top of the second tower body. The second mother liquor discharge pipe is located at the bottom of the second tower body;

[0009] An extraction liquid reflux tank, which is communicated with the first extraction liquid discharge pipe and the second extraction liquid discharge pipe; and

[0010] A finished product tank, which is communicated with the second mother liquor discharge pipe.

[0011] Preferably, one end of the first extraction feed pipe is provided with a first extraction mixing box. A number of first extraction branch pipes are arranged on the first extraction mixing box. First flow limiting valves are arranged on the first extraction branch pipes.

[0012] Preferably, one end of the second extraction feed pipe is provided with a second extraction mixing box. A number of second extraction branch pipes are arranged on the second extraction mixing box. Second flow limiting valves are arranged on the second extraction branch pipes.

[0013] Preferably, a first heat exchange jacket is arranged on the side wall of the first tower body. A heating cavity is formed between the first heat exchange jacket and the first tower body.

[0014] Preferably, a first heat preservation jacket is sleeved on the first heat exchange jacket. Heat preservation cotton is filled in the first heat preservation jacket.

[0015] Preferably, a second heat exchange jacket is arranged on the side wall of the second tower body. A heating cavity is formed between the second heat exchange jacket and the second tower body.

[0016] Preferably, a second heat preservation jacket is sleeved on the second heat exchange jacket. Heat preservation cotton is filled in the second heat preservation jacket.

[0017] Preferably, a first pressure detection component is arranged on the top of the first tower body, and a second pressure detection component is arranged on the top of the second tower body.

[0018] Preferably, a first manhole is opened on the side wall of the first tower body, and a second manhole is opened on the side wall of the second tower body.

[0019] Preferably, a number of first observation ports are opened on the side wall of the first tower body, and a number of second observation ports are opened on the side wall of the second tower body.

[0020] Compared with the prior art, the utility model has at least the following advantages:

[0021] By means of extraction, the impurities in by-product sodium acetate are separated. Compared with the traditional processes such as evaporation and crystallization for separating impurities in by-product sodium acetate, there is less sodium acetate trihydrate in the impurities of by-product sodium acetate, and the obtained sodium acetate trihydrate has higher purity, greatly improving the purification efficiency of purifying sodium acetate trihydrate from by-product sodium acetate. Brief Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the device process for separating sodium acetate trihydrate from by-product sodium acetate.

[0023] Figure 2 It is a schematic diagram of the first tower body.

[0024] Figure 3 It is a schematic diagram of the second tower body.

[0025] In the figure: the first tower body 100, the first sieve plate 110, the first mother liquor pipe 120, the first extraction feed pipe 130, the first extraction mixing tank 131, the first extraction branch pipe 132, the first flow limiting valve 133, the first extraction liquid outlet pipe 140, the first mother liquor outlet pipe 150, the first heat exchange jacket 160, the first heat preservation jacket 161, the first pressure detection component 170, the first manhole 180, the first observation port 190, the second tower body 200, the second sieve plate 210, the second mother liquor pipe 220, the second extraction feed pipe 230, the second extraction mixing tank 231, the second extraction branch pipe 232, the second flow limiting valve 233, the second extraction liquid outlet pipe 240, the second mother liquor outlet pipe 250, the second heat exchange jacket 260, the second heat preservation jacket 261, the second pressure detection component 270, the second manhole 280, the second observation port 290, the extraction liquid reflux tank 300, the finished product tank 400. Detailed Embodiments

[0026] 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 in combination with the drawings of the embodiments of the present invention. The present invention is not limited to the following specific embodiments.

[0027] 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, and are 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 construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] Please refer to Figures 1 to 3 Figures 1 to 3 , a device for separating sodium acetate trihydrate from by - product sodium acetate, comprising a first tower body 100, wherein a first sieve plate 110 is arranged inside the first tower body 100, and a first mother liquor pipe 120, a first extraction feed pipe 130, a first extraction liquid outlet pipe 140 and a first mother liquor outlet pipe 150 are arranged on the first tower body 100. The first extraction feed pipe 130 is located below the first mother liquor pipe 120, the first extraction liquid outlet pipe 140 is located at the top of the first tower body 100, and the first mother liquor outlet pipe 150 is located at the bottom of the first tower body 100;

[0029] A second tower body 200, wherein a second sieve plate 210 is arranged inside the second tower body 200, and a second mother liquor pipe 220, a second extraction feed pipe 230, a second extraction liquid outlet pipe 240 and a second mother liquor outlet pipe 250 are arranged on the second tower body 200. The second mother liquor pipe 220 is communicated with the first mother liquor outlet pipe 150. The second extraction feed pipe 230 is located below the second mother liquor pipe 220, the second extraction liquid outlet pipe 240 is located at the top of the second tower body 200, and the second mother liquor outlet pipe 250 is located at the bottom of the second tower body 200;

[0030] An extraction liquid reflux tank 300, which is communicated with the first extraction liquid outlet pipe 140 and the second extraction liquid outlet pipe 240; and

[0031] A finished product tank 400, which is communicated with the second mother liquor outlet pipe 250.

[0032] The specific working process is as follows:

[0033] The by-product sodium acetate mixed solution is introduced into the first tower body 100 through the first mother liquor pipe 120, and the extractant (used to extract and separate impurities in the by-product sodium acetate mixed solution) is introduced into the first tower body 100 through the first extraction feed pipe 130. The by-product sodium acetate mixed solution and the extractant are mixed with each other. Since the density of the extractant is less than that of the by-product sodium acetate mixed solution, and the first extraction feed pipe 130 is located below the first mother liquor pipe 120, the extractant and the by-product sodium acetate mixed solution enter the first tower body 100 at the same time. When the extractant enters the first tower body 100, it will first fall to the bottom of the first tower body 100. As the by-product sodium acetate mixed solution enters, the by-product sodium acetate mixed solution with a heavier mass fraction will precipitate to the bottom of the first tower body 100, and the extractant will be exchanged to the top of the first tower body 100. Therefore, the extractant will make countercurrent contact with the by-product sodium acetate mixed solution in the first tower body 100. The organic matter in the by-product sodium acetate mixed solution and the extractant are dissolved in the extractant through similar solubility. The primary trisodium acetate solution produced after extraction is insoluble in the extractant. The primary trisodium acetate solution produced after extraction sinks to the bottom of the first tower body 100, and the extractant mixed with impurities formed again after extraction floats above the primary trisodium acetate solution. The primary trisodium acetate solution and the extractant are clearly stratified. Generally, after extraction, a stratified solution is formed. The bottom layer is the primary trisodium acetate solution layer, and the upper two layers are the extractant layers. As the by-product sodium acetate mixed solution and the extractant are continuously added until the entire first tower body 100 is filled, the lighter extractant layer at the top of the tower will flow out from the upper first extraction liquid outlet pipe 140 and enter the extraction liquid reflux tank 300, and the primary trisodium acetate solution in the tower kettle will flow out from the second mother liquor outlet pipe 250.

[0034] Through the pumping of the pump body, the primary trisodium acetate solution enters the second tower body 200 through the second mother liquor pipe 220, and a new unextracted extractant is added and enters the second tower body 200 through the second extraction feed pipe 230. The primary trisodium acetate solution undergoes secondary extraction in the second tower body 200 and forms a secondary trisodium acetate solution. The extraction effect is the same as the extraction method of the first tower body 100, and through extraction, a trisodium acetate solution with better purity and fewer impurities can be obtained. The extractant after extraction flows out from the second extraction liquid outlet pipe 240 at the top of the tower, and the trisodium acetate solution flows out from the second mother liquor outlet pipe 250 and enters the product forming tank 400.

[0035] The extraction solution in the extraction liquid reflux tank 300 is rectified to obtain the original extractant again for reuse in the next extraction. The trisodium acetate solution in the product forming tank 400 undergoes processes such as concentration and crystallization to obtain trisodium acetate.

[0036] Achieved effects:

[0037] By means of extraction, impurities in by-product sodium acetate are separated. Compared with traditional processes such as evaporation and crystallization for separating impurities in by-product sodium acetate, there is less sodium acetate trihydrate in the impurities of by-product sodium acetate, and the obtained sodium acetate trihydrate has higher purity, greatly improving the purification efficiency of purifying sodium acetate trihydrate from by-product sodium acetate.

[0038] In a possible embodiment, refer to Figure 2 , one end of the first extraction inlet pipe 130 is provided with a first extraction mixing tank 131. A number of first extraction branch pipes 132 are provided on the first extraction mixing tank 131, and a first flow limiting valve 133 is provided on the first extraction branch pipe 132. In Method 1, if a single extraction agent is used, one of the first extraction branch pipes 132 is used to introduce the extraction agent. The extraction agent enters the first extraction mixing tank 131, and the single type of extraction agent is sent into the first extraction inlet pipe 130 through a pump body and flows to the first tower body 100. In Method 2, if it is necessary to improve the extraction efficiency of by-product sodium acetate, two or more extraction agents are mixed and added into the first tower body 100. Therefore, by introducing different types of extraction agents from different first extraction branch pipes 132, mixing in the first extraction mixing tank 131, and sending the mixed extraction liquid into the first extraction inlet pipe 130 through a pump body and flowing to the first tower body 100, the extraction efficiency and the removal effect of impurities in by-product sodium acetate can be improved.

[0039] Specifically, the first flow limiting valve 133 is used to control the flow rate of the extraction agent in the first extraction branch pipe 132, and when the extraction agent in the first extraction branch pipe 132 reaches the standard amount, stop adding the extraction agent into the first extraction mixing tank 131.

[0040] In a possible embodiment, refer to Figure 3 , one end of the second extraction inlet pipe 230 is provided with a second extraction mixing tank 231. A number of second extraction branch pipes 232 are provided on the second extraction mixing tank 231, and a second flow limiting valve 233 is provided on the second extraction branch pipe 232. Uncontaminated extraction agent (i.e., unused extraction agent) is introduced into the second extraction branch pipe 232. The extraction agent added by the second extraction branch pipe 232 can be the same as the extraction agent added by the first extraction branch pipe 132 for secondary extraction to improve the impurity removal efficiency of by-product sodium acetate.

[0041] Specifically, the second flow limiting valve 233 is used to control the flow rate of the extraction agent in the second extraction branch pipe 232, and when the extraction agent in the second extraction branch pipe 232 reaches the standard amount, stop adding the extraction agent into the second extraction mixing tank 231.

[0042] In a possible embodiment, refer to Figure 1and Figure 3 , in order to improve the extraction efficiency, the by - product sodium acetate has better extraction efficiency under the heated state, and can further improve the impurity removal efficiency of the by - product sodium acetate. A first heat exchange sleeve 160 is arranged on the side wall of the first tower body 100. A heating cavity is formed between the first heat exchange sleeve 160 and the first tower body 100. A hot solution inlet is arranged at the bottom of the first heat exchange sleeve 160 near the tower kettle, and a hot solution outlet is arranged at the top of the first heat exchange sleeve 160 near the tower top. Hot solution, such as water with a higher temperature, is introduced into the hot solution inlet. The hot solution enters the heating cavity and fills the heating cavity, and then flows out from the hot solution outlet. A hot solution circulation can be formed by a pump body, and the hot solution is continuously heated, so that the temperature of the by - product sodium acetate in the first tower body 100 rises, thereby improving the extraction efficiency and purifying more sodium acetate trihydrate.

[0043] In a possible embodiment, a first heat preservation sleeve 161 is sleeved on the first heat exchange sleeve 160, and heat preservation cotton is filled in the first heat preservation sleeve 161. By arranging the first heat preservation sleeve 161, the heat preservation cotton wraps the outer surface of the first heat exchange sleeve 160 to prevent the heat of the hot solution in the first heat exchange sleeve 160 from being lost.

[0044] In a possible embodiment, refer to Figure 1 and Figure 3 , a second heat exchange sleeve 260 is arranged on the side wall of the second tower body 200. A heating cavity is formed between the second heat exchange sleeve 260 and the second tower body 200. The effect of the second heat exchange sleeve 260 is the same as that of the first heat exchange sleeve 160, which is to improve the extraction efficiency and purify more sodium acetate trihydrate.

[0045] In a possible embodiment, a second heat preservation sleeve 261 is sleeved on the second heat exchange sleeve 260, and heat preservation cotton is filled in the second heat preservation sleeve 261. The effect of the second heat exchange sleeve 260 is the same as that of the first heat preservation sleeve 161, which is to prevent the heat of the hot solution in the second heat exchange sleeve 260 from being lost.

[0046] In a possible embodiment, refer to Figure 2 and Figure 3 , a first pressure detection member 170 is arranged on the top of the first tower body 100, and a second pressure detection member 270 is arranged on the top of the second tower body 200. To prevent the pressure in the first tower body 100 from being too high, timely detection is carried out to improve safety.

[0047] In a possible embodiment, refer to Figure 2 and Figure 3 , a first manhole 180 is opened on the side wall of the first tower body 100, and a second manhole 280 is opened on the side wall of the second tower body 200.

[0048] In a possible embodiment, referring to Figure 2 and Figure 3 , a plurality of first observation ports 190 are formed in the side wall of the first tower body 100, and a plurality of second observation ports 290 are formed in the side wall of the second tower body 200.

[0049] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for separating sodium acetate trihydrate from by-product sodium acetate, characterized in that: include A first tower body, wherein a first sieve plate is disposed in the first tower body, and a first mother liquor pipe, a first extraction liquid inlet pipe, a first extraction liquid outlet pipe, and a first mother liquor liquid outlet pipe are disposed on the first tower body, wherein the first extraction liquid inlet pipe is located below the first mother liquor pipe, the first extraction liquid outlet pipe is located at the top of the first tower body, and the first mother liquor liquid outlet pipe is located at the bottom of the first tower body; A second tower body, wherein a second sieve plate is disposed in the second tower body, a second mother liquor pipe, a second extraction liquid inlet pipe, a second extraction liquid outlet pipe and a second mother liquor liquid outlet pipe are disposed on the second tower body, the second mother liquor pipe is connected to the first mother liquor liquid outlet pipe, the second extraction liquid inlet pipe is located below the second mother liquor pipe, the second extraction liquid outlet pipe is located at the top of the second tower body, and the second mother liquor liquid outlet pipe is located at the bottom of the second tower body; an extract reflux tank, the extract reflux tank being connected to the first extract outlet pipe and the second extract outlet pipe; and A material forming tank is connected to the second mother liquid outlet pipe.

2. A device for separating sodium acetate trihydrate from by-product sodium acetate as claimed in claim 1, characterized in that: A first extraction mixing box is arranged at one end of the first extraction liquid inlet pipe, a plurality of first extraction branch pipes are arranged on the first extraction mixing box, and a first flow limiting valve is arranged on the first extraction branch pipe.

3. A device for separating sodium acetate trihydrate from by-product sodium acetate as claimed in claim 1, characterized in that: A second extraction mixing box is arranged at one end of the second extraction liquid inlet pipe, a plurality of second extraction branch pipes are arranged on the second extraction mixing box, and a second flow limiting valve is arranged on the second extraction branch pipe.

4. A device for separating sodium acetate trihydrate from by-product sodium acetate as claimed in claim 1, characterized in that: A first heat exchange jacket is disposed on the side wall of the first tower body, and a heating cavity is formed between the first heat exchange jacket and the first tower body.

5. A device for separating sodium acetate trihydrate from by-product sodium acetate as claimed in claim 4, characterized in that: The first heat exchange sleeve is sleeved with a first insulation sleeve, and the first insulation sleeve is filled with insulation cotton.

6. A device for separating sodium acetate trihydrate from by-product sodium acetate as claimed in claim 1, characterized in that: A second heat exchange jacket is arranged on the side wall of the second tower body, and a heating cavity is formed between the second heat exchange jacket and the second tower body.

7. A device for separating sodium acetate trihydrate from by-product sodium acetate as claimed in claim 6, characterized in that: The second heat exchange sleeve is sleeved with a second heat insulation sleeve, and the second heat insulation sleeve is filled with heat insulation cotton.

8. A device for separating sodium acetate trihydrate from by-product sodium acetate as claimed in claim 1, characterized in that: A first pressure detection component is disposed on the top of the first tower body, and a second pressure detection component is disposed on the top of the second tower body.

9. A device for separating sodium acetate trihydrate from by-product sodium acetate as claimed in claim 1, characterized in that: A first manhole is provided on the side wall of the first tower body, and a second manhole is provided on the side wall of the second tower body.

10. A device for separating sodium acetate trihydrate from by-product sodium acetate as claimed in claim 1, characterized in that: A plurality of first observation ports are provided on the side wall of the first tower body, and a plurality of second observation ports are provided on the side wall of the second tower body.

Images