CN220633048U - Organic solution rectification desalination treatment device containing salt - Google Patents

Organic solution rectification desalination treatment device containing salt Download PDF

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Publication number
CN220633048U
CN220633048U CN202322062827.2U CN202322062827U CN220633048U CN 220633048 U CN220633048 U CN 220633048U CN 202322062827 U CN202322062827 U CN 202322062827U CN 220633048 U CN220633048 U CN 220633048U
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salt
rectifying
desalting
organic solution
temporary storage
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秦中贤
向蒙
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CHONGQING SHANJU CHEMICAL MACHINERY CO LTD
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CHONGQING SHANJU CHEMICAL MACHINERY CO LTD
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination

Abstract

The utility model relates to the technical field of rectifying tower desalination, and discloses a rectifying and desalination treatment device for a salt-containing organic solution.

Description

Organic solution rectification desalination treatment device containing salt
Technical Field
The utility model relates to the technical field of rectifying tower desalination, in particular to a rectifying and desalination treatment device for a salt-containing organic solution.
Background
The rectification is a separation and purification process for gradually separating each component by heating by utilizing the difference of the volatility of each component in the mixture. The rectification is usually carried out in a rectifying tower, and the structure of the packed rectifying tower is relatively simple, and the packed rectifying tower mainly comprises a tower body, a packing layer, a feed inlet, a discharge outlet, a steam inlet, a condenser, a liquid return pipe and the like. Wherein the packing layer is an important part in the tower body, and can increase the contact area between the mixture and steam, thereby improving the separation efficiency and ensuring the separation purity.
At present, the rectifying tower is widely applied in the fields of chemical industry, petroleum, food, pharmacy and the like. The purpose of rectification is to obtain high-purity products, but most of the existing rectification towers have the problem that the purity of purified substances is not high enough, for example, when the rectification raw materials are salt-containing organic solutions, part of salt is always carried in the rising gas after evaporation, and the salt and the gas are taken out together at the tower top, so that the purity of the products obtained by rectification can be reduced, and meanwhile, the salt rising along with the gas can also cause corrosion damage to various parts and structures inside the rectification tower, so that the normal use of the rectification tower is influenced, and in long-time production, the salt gradually adheres and accumulates to and can also cause blockage to various pipelines connected with the rectification tower. Desalination is therefore a relatively important part of the rectification process of salt-containing organic solutions.
The desalination method adopted in the existing rectification process mainly comprises two steps, namely, firstly, evaporating raw materials, separating out salt in the raw materials, and then sending the raw materials into a rectification tower for distillation, wherein the method can increase the complexity of a rectification system structure and the production cost, and the desalination effect is not ideal; the other method is that a desalting filter membrane is arranged at the bottom of the rectifying tower, salt is prevented from being taken away by gas through the desalting filter membrane, although the desalting filter membrane can effectively desalt, the desalting filter membrane is high in price and is extremely easy to damage, frequent replacement is needed, each replacement is a small cost expenditure, and if the desalting filter membrane is not found in time after being damaged, the desalting effect is greatly reduced.
Disclosure of Invention
The utility model aims to provide a rectification desalting treatment device for a salt-containing organic solution, which aims to solve the problems of high desalting cost and unsatisfactory desalting effect in the existing rectification process.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a rectifying and desalting treatment device for a salt-containing organic solution comprises a rectifying tower, a reboiler, a condenser, a product tank and a desalter arranged in the rectifying tower, wherein the desalter comprises a plurality of blocking parts, and a plurality of special-shaped channels are formed between the blocking parts.
The beneficial effect of this scheme is: through setting up the desalination ware in the rectifying column in rectifying processing apparatus, a plurality of stops in the desalination ware block the salt of liquid foam form that rises along with gas, thereby the gas that needs to be adopted and collect is worn out by special-shaped channel and is realized high-efficient desalination purpose, and the simple structure of desalination ware, setting convenience, low in production cost compare and easily damaged and the desalination cost that the price is expensive filter paper that removes salt.
1. Because salt usually exists in the form of ions in the organic solution, a small part of liquid in the organic solution can be taken away when the gas is evaporated and rises, so that liquid foam is formed, but in the rising process, the salt cannot be changed into gas, but is mixed in the gas in the form of liquid foam, and the liquid foam can pass through a packing layer together with the gas to reach the top of the tower, so that the purity of a product is influenced, and equipment is corroded in the process of transferring the product and the like; the blocking parts can form special-shaped channels, so that the blocking parts can collide the ascending gas and liquid foam at the lower part for multiple times, the liquid foam can be attached to the surface of the blocking parts, and the attached liquid foam is gradually increased and diffused along with rectification, then is mutually converged, and forms larger liquid drops to be separated from the blocking parts and fall down, so that the salt and the ascending gas are separated, the desalting function is realized, and the desalting effect can be improved by 50 times compared with the prior art.
2. The aperture size of the special-shaped channel can be customized according to specific rectification and purification requirements, so that the production requirements of enterprises are met, and the special-shaped channel has popularization.
3. The salt solution which is converged and dropped in the desalter can be contacted with the gas rising in the tower, so that part of the gas is liquefied and then is returned to the tower bottom for secondary evaporation and separation, and the rectification purity is improved.
Preferably, the plurality of blocking parts are all metal wires, the metal wires are woven into a multi-layer desalination net, and the plurality of special-shaped channels are all positioned in the multi-layer desalination net.
The beneficial effect of this scheme is: 1. the desalter is formed by weaving metal wires, so that the manufacturing process is simple, the structure of a metal wire woven desalting net is stable, and the desalting net is not easy to damage in the using process after being arranged in a rectifying tower, so that the desalting efficiency can be kept extremely high for a long time.
2. After the liquid foam collides with the metal wire and then is attached to the surface of the metal wire, adjacent liquid foam is mutually converged into liquid drops and flows to the weaving junction of the two wires along the metal wire, and the liquid drops are bigger and bigger until the liquid drops are separated from the metal wire and fall down under the wettability of the metal wire, the surface tension of the liquid and the capillary action of the metal wire, so that the desalting function is better and more efficient.
Preferably, a packing layer is arranged in the rectifying tower, and the desalter is arranged above the packing layer.
The beneficial effect of this scheme is: 1. the desalter is arranged above the packing layer, and the packing layer separates a part of impurities or solution in the ascending gas so as to reduce the possibility that the impurities or solution enter the desalter together, thereby ensuring that liquid foam can collide and adhere with the stainless steel wire mesh more fully and ensuring the desalting effect of the desalter.
2. The height of the desalter installed in the tower is increased to increase the contact time of the salt solution reflux and the gas, thereby further improving the purity of the rectification separation.
Preferably, the reboiler is connected with the bottom of the rectifying tower, and the reboiler is provided with a feed pipe; the condenser is connected with the top of rectifying column, and the product jar is connected with the condenser.
The beneficial effect of this scheme is: the rectification operation of the salt-containing organic solution is completed.
Preferably, the condenser is connected with a reflux ratio distributor, and the reflux ratio distributor is connected with the top of the rectifying tower.
The beneficial effect of this scheme is: improving the rectification purity.
Preferably, the reflux ratio distributor is also connected with a qualified product temporary storage tank and an unqualified product temporary storage tank, valves are arranged between the qualified product temporary storage tank and the reflux ratio distributor and between the unqualified product temporary storage tank and the reflux ratio distributor, and the product tank is connected with the qualified product temporary storage tank.
The beneficial effect of this scheme is: the liquefied and condensed solution can be selectively collected in the qualified product temporary storage tank or the unqualified product temporary storage tank through the control valve, so that the controllability of the desalting treatment device on product collection is improved, and the purity of the product is ensured.
Preferably, a recovery pipe is arranged between the temporary storage tank of the unqualified product and the reboiler for connection.
The beneficial effect of this scheme is: the recovery pipe is used for recovering the temporarily stored unqualified solution into the reboiler for secondary rectification and purification, so that the utilization rate of substances in the salt-containing organic solution is improved, the material waste is reduced, the production cost is saved, and under the desalination treatment of the desalter, the temporarily stored unqualified solution is desalted, so that the conditions of corrosion and blockage of equipment and pipelines caused by salt in the solution can be reduced during the temporary storage and in the process of returning the solution to the reboiler through the recovery pipe, and the enterprise is helped to reduce the maintenance cost.
Drawings
FIG. 1 is a schematic diagram showing the construction of a desalting treatment apparatus in embodiment 1 of the present utility model;
FIG. 2 is a schematic diagram showing the structure of the inside of a rectifying column in example 1 of the present utility model;
FIG. 3 is a schematic diagram showing the construction of a desalting treatment apparatus in example 2 of the present utility model.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: rectifying column 1, desalter 2, installation piece 21, packing layer 3, reboiler 4, liquid runner pipe 41, gas runner pipe 42, inlet pipe 43, condenser 5, reflux ratio distributor 6, disqualified product temporary storage tank 7, recovery pipe 71, qualified product temporary storage tank 8, product tank 9.
Example 1
Example 1 an apparatus for rectifying and desalting a salt-containing organic solution, as shown in fig. 1, comprises a rectifying column 1, a reboiler 4, a condenser 5, a product tank 9, and a desalter 2 installed in the rectifying column 1, substantially as shown in fig. 1-2. The reboiler 4 is connected with a liquid flow pipe 41 and a gas flow pipe 42 arranged between the bottom of the rectifying tower 1, a feed pipe 43 is arranged on the reboiler 4, when the salt-containing organic solution is rectified, the salt-containing organic solution enters the reboiler 4 through the feed pipe 43, the reboiler 4 heats the salt-containing organic solution in the reboiler, light component substances to be purified in the solution are evaporated into gas, then the gas is introduced into the rectifying tower 1 through the gas flow pipe 42, and the gas is gradually separated from other substances in the continuously rising process in the rectifying tower 1 until the gas reaches the top of the rectifying tower, and the light component content reaches the extraction purity requirement. The condenser 5 is connected with the top of the rectifying tower 1 through a pipeline, the product tank 9 is connected with the condenser 5, light components enter the condenser 5 from the top of the rectifying tower 1 to be condensed and liquefied, and liquefied light component solution is collected in the product tank 9 again to finish the rectifying and purifying operation of the salt-containing organic solution.
In addition, in this embodiment, in order to improve the rectification purity, a reflux ratio distributor 6 is further connected between the condenser 5 and the product tank 9, and the bottom of the reflux ratio distributor 6 is connected with the top of the rectification column 1, so as to reflux a part of liquefied light component solution to the rectification column 1, and the reflux solution falls from the top of the rectification column 1 to exchange mass and heat with the gas rising in the column, so that part of the liquefied gas is returned to the bottom of the column to perform secondary evaporation separation, thereby improving the rectification purity. As shown in fig. 1, the liquid circulation pipe 41 and the reflux ratio distributor 6 are respectively provided with a U-shaped pipe between the rectification tower 1, and the U-shaped pipe has a liquid sealing function and can avoid gas circulation, thereby maintaining the balance of gas and liquid in the device and the stability of flow.
As shown in fig. 2, the desalter 2 includes a plurality of blocking portions between which a plurality of profiled channels are formed. In this embodiment, the blocking portions are all wires, and in this embodiment, the wires are specifically stainless steel wires; the stainless steel wires are woven into a plurality of layers of desalting nets, a plurality of through holes are formed in each layer of desalting net after weaving, and a plurality of special-shaped channels are formed by the through holes among the plurality of layers of desalting nets. The special-shaped channel can be used for allowing the ascending gas and the reflux solution in the rectifying tower 1 to pass through, and in the process of heating and evaporating the salt-containing organic solution in the reboiler 4, as salt usually exists in the form of ions in the organic solution, a small part of liquid in the organic solution can be taken away when the gas is evaporated and ascends, so that liquid foam is formed, and ions are easy to ascend along with the evaporated gas after being heated, but in the ascending process, the salt cannot be changed into gas, but is mixed in the gas in the form of liquid foam, at the moment, the salt in the liquid foam state passes through the packing layer 3 along with the light component gas, reaches the top of the rectifying tower 1, and enters the condenser 5 to be cooled and redissolved in the light component solution, so that the purity of a product is influenced, and corrosion is caused to equipment in the process of product transfer and the like.
Therefore, the desalter 2 is arranged above the packing layer 3 in the rectifying tower 1, and the desalter 2 is arranged in the following specific way: a plurality of uniformly distributed installation blocks 21 are fixed on the inside of the rectifying tower 1 above the packing layer 3 by welding, threaded holes are formed in the installation blocks 21, and then the bottom of the desalter 2 is inserted with screws which are fixed in the threaded holes in the installation blocks 21. The desalter 2 is arranged above the packing layer 3, the packing layer 3 increases the contact time and contact area of rising gas and reflux liquid of the rectifying tower 1 so as to improve the separation purity, and then the gas and liquid foam passing through the packing layer 3 enter the desalter again, thereby reducing the possibility that the impurities enter the desalter 2 together, ensuring that the liquid foam can collide and adhere with the stainless steel wire gauze more fully and ensuring the desalting effect of the desalter 2. The salt in the liquid foam state rises along with the gas and enters the desalter 2 after passing through the packing layer 3, because a plurality of special-shaped channels exist in the desalter 2 after being woven by the stainless steel wires, the gas can continuously rise upwards through the special-shaped channels, the salt in the liquid foam state is attached to the surface of the stainless steel wires after colliding with the stainless steel wires after entering the desalter 2, the liquid foam attached to the surface of the stainless steel wires gradually increases and diffuses along with the progress of rectification, adjacent liquid foam mutually converges under the action of gravity sedimentation of the liquid foam, larger liquid drops are formed and flow to the joint of the two wires along the stainless steel wires, and the liquid drops are larger and larger under the wettability of the stainless steel wires, the surface tension of the liquid and the capillary action of the stainless steel wires until the self gravity of the aggregated liquid drops exceeds the resultant force of the rising force of the gas and the surface tension of the liquid, and the liquid drops are separated from the stainless steel wires and fall down, so that the salt and rising gas separation is completed, and the function is realized. The desalter 2 which is clamped and installed is formed by weaving stainless steel wires, has stable structure and cannot be damaged due to long service cycle, so that the desalting effect is not affected. In addition, the salt solution which has dropped in the desalter 2 is also brought into contact with the gas rising in the column, and the same effect as that of the solution refluxed to the column top from the reflux ratio distributor 6 is obtained, so that the purity of the produced material in the column can be further improved.
In addition, the height of the stainless steel wire braid and the pore size of the formed special-shaped channel in the desalter 2 are required to be customized according to specific rectification and purification requirements, and the degree of desalination is judged by measuring the conductivity in the solution of the obtained product through experiments: the lower the conductivity measured, the lower the salt content in the solution, and the higher the desalination effect of the desalination device 2; that is, in the customization, the desalination device 2 is woven and formed according to the specific standard of the enterprise for desalination, and then is mounted above the filler layer 3. In order to secure the desalting effect, the pore size of the irregular channel in the desalter 2 is calculated such that the gas-liquid filtration constant is selected in the range of 0.1 to 0.3 and the specific surface area is selected in the range of 200 to 800 square meters per gram.
In the rectification process of the organic solution containing salt, the gas is desalted and then enters the condenser 5 for condensation, liquefaction and collection, so that the corrosion degree of equipment caused by the salt contained in the collected solution can be reduced, the desalter 2 is simple in structure, convenient to install and not easy to damage, the desalting effect can be customized according to specific production requirements of enterprises, and the desalting device has popularization.
In the practical application process, a certain enterprise needs to carry out rectification operation of removing sodium bicarbonate from a salt-containing organic solvent containing sodium bicarbonate, when the existing rectification treatment device is utilized for rectification separation, after the intermediate product extracted from the top of the rectification tower 1 is condensed and liquefied, the conductivity of the obtained intermediate product solution is always above 500 mu S/cm, and the salt content of the intermediate product is too high to be produced in the next step. When the desalter 2 in the scheme is installed, and the pore size of the special-shaped channel in the desalter 2 is calculated, the gas-liquid filtration constant is selected to be 0.3, the specific surface area is selected to be 200 square meters per gram, the conductivity of the finally obtained intermediate product solution is reduced to be below 10 mu S/cm, the desalting effect is increased by more than 50 times, the normal use of the intermediate product is ensured, meanwhile, the damage to equipment and pipelines caused by the intermediate product in the subsequent processing is greatly reduced, and the production difficulty and the production cost are solved for enterprises.
Example 2
The rectification and desalination treatment device for the organic solution containing salt as shown in fig. 3 further comprises a qualified product temporary storage tank 8 and an unqualified product temporary storage tank 7, wherein the qualified product temporary storage tank 8 and the unqualified product temporary storage tank 7 are connected with the bottom of the reflux ratio distributor 6, valves are arranged on connecting pipelines between the qualified product temporary storage tank 8 and the reflux ratio distributor 6 and between the unqualified product temporary storage tank 7 and the reflux ratio distributor 6, and the liquefied and condensed solution can be selectively collected in the qualified product temporary storage tank 8 or the unqualified product temporary storage tank 7 through the control valves, and the product tank 9 is connected with the qualified product temporary storage tank 8.
A recovery pipe 71 is arranged between the temporary storage tank 7 of the unqualified product and the reboiler 4 for connection, when the organic solution containing salt is subjected to rectification and purification, the content of light components required to be collected is reduced, so that the content of the light components extracted from the top of the rectification tower 1 cannot meet the extraction requirement in the later stage of rectification, at the moment, a valve on the temporary storage tank 8 of the qualified product is closed, a valve on the temporary storage tank 7 of the unqualified product is opened, the solution with unqualified purity is collected in the temporary storage tank 7 of the unqualified product for temporary storage, the temporary storage solution is recovered into the reboiler 4 through the recovery pipe 71 for secondary rectification and purification along with the addition of new raw materials, the utilization rate of substances in the organic solution containing salt is improved, and the production cost is saved while the waste of the materials is reduced. Under the desalination treatment of the desalination device 2, the temporarily stored reject solution is subjected to desalination treatment, so that corrosion and blockage caused by salt in the solution to equipment and pipelines can be reduced during the temporary storage and during the process of returning to the reboiler 4 through the recovery pipe 71, thereby helping enterprises to reduce maintenance cost.
In addition, be equipped with the heat preservation on the unqualified temporary storage jar, the heat preservation can keep warm the unqualified solution of inside temporary storage, when solution returns to reboiler 4 and carries out the secondary evaporation rectification, keeps the solution that has certain temperature and can reduce the required steam volume of realization light component thermal evaporation to further practice thrift manufacturing cost.
The foregoing is merely exemplary of the present utility model, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present utility model, and these should also be regarded as the protection scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (7)

1. A salt-containing organic solution rectifying and desalting treatment device is characterized in that: the device comprises a rectifying tower, a reboiler, a condenser, a product tank and a desalter arranged in the rectifying tower, wherein the desalter comprises a plurality of blocking parts, and a plurality of special-shaped channels are formed between the blocking parts; the reboiler is connected with a liquid flow pipe and a gas flow pipe arranged between the bottom of the rectifying tower, the condenser is connected with the top of the rectifying tower, and the product tank is connected with the condenser.
2. The apparatus for rectifying and desalting a salt-containing organic solution according to claim 1, wherein: the blocking parts are all metal wires, the metal wires are woven into a multi-layer desalination net, and the special-shaped channels are all positioned in the multi-layer desalination net.
3. The apparatus for rectifying and desalting a salt-containing organic solution according to claim 2, wherein: a packing layer is arranged in the rectifying tower, and a desalter is arranged above the packing layer.
4. A device for rectifying and desalting a salt-containing organic solution according to claim 3, wherein: the reboiler is connected with the bottom of the rectifying tower, and a feed pipe is arranged on the reboiler; the condenser is connected with the top of rectifying column, and the product jar is connected with the condenser.
5. The apparatus for rectifying and desalting a salt-containing organic solution according to claim 4, wherein: the condenser is connected with a reflux ratio distributor which is connected with the top of the rectifying tower.
6. The apparatus for rectifying and desalting a salt-containing organic solution according to claim 5, wherein: the reflux ratio distributor is also connected with a qualified product temporary storage tank and an unqualified product temporary storage tank, valves are arranged between the qualified product temporary storage tank and the reflux ratio distributor and between the unqualified product temporary storage tank and the reflux ratio distributor, and the product tank is connected with the qualified product temporary storage tank.
7. The apparatus for rectifying and desalting a salt-containing organic solution according to claim 6, wherein: and a recovery pipe is arranged between the temporary storage tank of the unqualified product and the reboiler for connection.
CN202322062827.2U 2023-07-31 2023-07-31 Organic solution rectification desalination treatment device containing salt Active CN220633048U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322062827.2U CN220633048U (en) 2023-07-31 2023-07-31 Organic solution rectification desalination treatment device containing salt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322062827.2U CN220633048U (en) 2023-07-31 2023-07-31 Organic solution rectification desalination treatment device containing salt

Publications (1)

Publication Number Publication Date
CN220633048U true CN220633048U (en) 2024-03-22

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