CN110755867A - Dmf waste liquid treatment device and treatment method thereof - Google Patents
Dmf waste liquid treatment device and treatment method thereof Download PDFInfo
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- CN110755867A CN110755867A CN201911122726.1A CN201911122726A CN110755867A CN 110755867 A CN110755867 A CN 110755867A CN 201911122726 A CN201911122726 A CN 201911122726A CN 110755867 A CN110755867 A CN 110755867A
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Abstract
The invention discloses a dmf waste liquid treatment device and a treatment method thereof, and the device comprises a water storage tank, wherein the water storage tank is connected with a heating tank through a water inlet pipe, the water inlet pipe is provided with a water inlet one-way valve, the water inlet pipe is also provided with a water inlet pump, the heating tank is internally provided with a heating part, the heating part is arranged at the bottom of the heating tank, the upper part of the heating tank is provided with a pressure limiting air valve, the upper part of the heating tank is sleeved with an air chamber, one side of the air chamber is provided with a condensation bin, and the lower part of the. The dmf extraction apparatus and the treatment method thereof according to the present invention can improve the purity of dmf extraction, reduce the dmf discharge during dmf treatment, reduce energy waste during dmf distillation, and reduce the dmf treatment cost.
Description
Technical Field
The invention relates to a dmf waste liquid treatment device and a treatment method thereof, and belongs to the technical field of dmf waste liquid treatment devices.
Background
Polyurethane (PU) resins used in the production of PU synthetic leather typically use DMF as a solvent. On a PU synthetic leather wet production line, PU resin is coated on leather base cloth and then enters a coagulating tank, DMF is exuded and dissolved in water during the coagulating tank, and the obtained solution is discharged into a DMF waste solution storage tank after reaching a certain mass concentration (about 20 percent). In order to eliminate the environmental impact of the waste liquid and reduce the production cost, the DMF waste liquid must be recycled, but the conventional recycling device uses distillation to evaporate water from the waste liquid, but the conventional recycling device has a large amount of DMF flowing into the air during the evaporation of the waste liquid, and the conventional DMF waste liquid treatment device has a large cost and causes large waste during the use.
Disclosure of Invention
The present invention provides a device and a method for treating dmf waste liquid to solve the above problems in the prior art, and aims to solve the problems of separation and extraction of dmf waste liquid.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a dmf waste liquid treatment device comprises a water storage tank 1, wherein the water storage tank 1 is connected with a heating tank 3 through a water inlet pipe 2, a water inlet one-way valve 4 is arranged on the water inlet pipe 2, a water inlet pump 5 is also arranged on the water inlet pipe 2, a heating part 6 is arranged in the heating tank 3, the heating part 6 is arranged at the bottom of the heating tank 3, a pressure limiting valve 7 is arranged on the upper part of the heating tank 3, an air chamber 8 is sleeved on the upper part of the heating tank 3, a condensation bin 9 is arranged on one side of the air chamber 8, a condensation pipe 10 is arranged on the lower part of the condensation bin 9, a condensation collection bin 11 is arranged on the lower part of the condensation pipe 10, a steam outlet pipe 12 is arranged on one side of the condensation bin 9, the steam outlet pipe 12 is connected with a water collection tank 13, the tail end of the steam outlet pipe 12 extends into the bottom of, the upper part of the water collecting tank 13 is connected with a steam exhaust pipe 26, the steam exhaust pipe 26 extends into the water storage tank 1, and the tail end of the steam exhaust pipe 26 extends out of the water storage tank 1.
Preferably, a water level switch 16 is arranged in the water collecting tank 13, and the water level switch 16 is connected with the water outlet valve 15.
Preferably, a condensation plate 17 is arranged in the condensation bin 9, a circulation water outlet pipe 18 is arranged on one side of the lower portion of the water collecting tank 13, one end, far away from the air chamber 8, of the circulation water outlet pipe 18 and the condensation plate 17 is connected, a circulation water inlet pipe 19 is further arranged on the water collecting tank 13 on one side of the circulation water outlet pipe 18, one end, close to the air chamber 8, of the circulation water inlet pipe 19 and the condensation plate 17 is connected, and a circulation water pump 20 is arranged on the circulation water inlet pipe 19.
Preferably, be equipped with water temperature detector 21 on the circulation inlet tube 19, still the cover is equipped with heating sleeve 22 on the circulation inlet tube 19, heating sleeve 22 installs the one side of being close to condenser plate 17, water temperature detector 21 sets up and is being close to header tank 13 one side, be equipped with pressure limiting water valve 23 on the circulation outlet pipe 18.
Preferably, a heat dissipation bin 24 is arranged on a steam exhaust pipe 26 in the water storage tank 1, the heat dissipation bin 24 is of a plate-shaped structure with a cavity, and the heat dissipation bin 24 is not communicated with the water storage tank 1.
Preferably, a stirring impeller 25 is provided at one side of the water collecting tank 13.
Treatment method of dmf waste liquid treatment device
S1, adding the dmf waste liquid to be treated in a water storage tank;
s2, injecting clear water at 100 ℃ into the water collecting tank, starting a circulating water pump, enabling the clear water to enter a condensation plate through a circulating water inlet pipe, detecting the water temperature in the circulating water inlet pipe through a water temperature detector, heating the water in the circulating water pipe through a heating sleeve when the water temperature is lower than 100 ℃, pressurizing the water through a pressure limiting water valve and the circulating water pump, and heating the water to 105-110 ℃ through the heating sleeve;
s3, injecting the dmf waste liquid in the water storage tank into the heating tank through the water inlet pump, starting the heating part to heat the dmf waste liquid in the heating tank, controlling the pressure in the heating tank through the pressure limiting air valve, and heating the dmf waste liquid to the temperature of 155-;
s4, allowing heated steam to enter the air chamber through the pressure limiting air valve, allowing the steam to enter the condensation bin from the air chamber, condensing the dmf in the steam by using the condensation plate, allowing the condensed dmf to enter the condensation collection bin through the condensation pipe, allowing the steam to enter the water collection tank through the steam outlet pipe, allowing the steam outlet pipe to penetrate into the water collection tank, and allowing the steam to enter the upper part of the water collection tank through the water in the water collection tank;
s5, steam enters a steam outlet pipe from the water collecting tank and enters a heat dissipation bin through the steam outlet pipe, the heat dissipation bin preheats the dmf waste liquid in the water storage tank, the steam is condensed in the heat dissipation bin, condensed water flows into the water collecting tank, and redundant steam is discharged into the atmosphere;
and S6, when the water level in the water collecting tank rises to the water level switch, the water outlet valve is opened, and the redundant water flows out of the water collecting tank.
Has the advantages that: the dmf extraction apparatus and the treatment method thereof according to the present invention can improve the purity of dmf extraction, reduce the dmf discharge during dmf treatment, reduce energy waste during dmf distillation, and reduce the dmf treatment cost.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of the overall structure of a dmf waste liquid treatment apparatus and a treatment method thereof according to an embodiment of the present invention.
Description of reference numerals:
in fig. 1, a water storage tank, 2, a water inlet pipe, 3, a heating tank, 4, a water inlet check valve, 5, a water inlet pump, 6, a heating part, 7, a pressure limiting air valve, 8, an air chamber, 9, a condensation bin, 10, a condensation pipe, 11, a condensation collection bin, 12, a steam outlet pipe, 13, a water collection tank, 14, a water outlet, 15, a water outlet valve, 16, a water level switch, 17, a condensation plate, 18, a circulation water outlet pipe, 19, a circulation water inlet pipe, 20, a circulation water pump, 21, a water temperature detector, 22, a heating sleeve, 23, a pressure limiting water valve, 24, a heat dissipation bin, 25, a stirring impeller, 26 and a steam exhaust pipe.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1, a dmf waste liquid treatment device comprises a water storage tank 1, wherein the water storage tank 1 is connected with a heating tank 3 through a water inlet pipe 2, the water inlet pipe 2 is provided with a water inlet one-way valve 4, the water inlet pipe 2 is further provided with a water inlet pump 5, the heating tank 3 is internally provided with a heating part 6, the heating part 6 is arranged at the bottom of the heating tank 3, the upper part of the heating tank 3 is provided with a pressure limiting valve 7, the upper part of the heating tank 3 is sleeved with a gas chamber 8, one side of the gas chamber 8 is provided with a condensation bin 9, the lower part of the condensation bin 9 is provided with a condensation pipe 10, the lower part of the condensation pipe 10 is provided with a condensation collection bin 11, one side of the condensation bin 9 is provided with a steam outlet pipe 12, the steam outlet pipe 12 is connected with a water collection tank 13, the tail end of the steam outlet pipe 12 extends to, the upper part of the water collecting tank 13 is connected with a steam exhaust pipe 26, the steam exhaust pipe 26 extends into the water storage tank 1, the tail end of the steam exhaust pipe 26 extends out of the water storage tank 1, the water storage tank can store the dmf waste liquid, the water storage tank conveys the dmf waste liquid to the heating tank through a water inlet pipe, a water inlet one-way valve can prevent the dmf waste liquid from flowing back, a water inlet pump conveys the dmf waste liquid, the heating tank is a pressure tank, the heating tank can heat the dmf waste liquid in the heating tank through a heating part, a pressure limiting air valve can increase the pressure in the heating tank, the pressure can increase the heating temperature of dmf in the heating tank, when the dmf waste liquid is heated to 155 ℃ and 160 ℃, the pressure limiting air valve can be opened to reduce the air pressure in the heating tank and exhaust the steam in the heating tank out of the heating tank, the pressure of the steam enters the air chamber and is reduced, the temperature of the dmf steam in the mixed, the temperature in the condensation bin is between 100 ℃ and 110 ℃, the water vapor is still in a vaporization state, the dmf vapor forms water drops due to cooling condensation and flows into the condensation tube, the water drops flow into the condensation collection bin through the condensation tube dmf to complete the purification and collection of the dmf, the treated water vapor is discharged into the water collection tank through the vapor outlet tube, the tail end of the vapor outlet tube is arranged at the bottom of the water collection tank, the vapor can permeate the water in the water collection tank and is discharged into the water collection tank, the residual dmf in the water vapor can be treated through the filtration of the water, the vapor is discharged through the vapor exhaust tube, the vapor can pass through the water storage tank when passing through the vapor exhaust tube, the water storage tank can cool the water vapor in the vapor exhaust tube, the cooled vapor is condensed into water drops and flows back to the water collection tank through the vapor exhaust tube, the hot gas generated by the condensation of the vapor can preheat the waste liquid in the water storage tank, the heating time of the heating tank is shortened, the water outlet can discharge water, and the water outlet valve can control the outflow of the water.
A water level switch 16 is arranged in the water collecting tank 13, the water level switch 16 is connected with a water outlet valve 15, the water level switch can control the water level in the water collecting tank, the water level in the water collecting tank is prevented from being too high or too low, and the water outlet valve can control the water to be discharged.
The condensation bin 9 is internally provided with a condensation plate 17, one side of the lower part of the water collection tank 13 is provided with a circulating water outlet pipe 18, the circulating water outlet pipe 18 is connected with one end of the condensation plate 17 far away from the air chamber 8, the water collection tank 13 on one side of the circulating water outlet pipe 18 is also provided with a circulating water inlet pipe 19, the circulating water inlet pipe 19 is connected with one end of the condensation plate 17 close to the air chamber 8, the circulating water inlet pipe 19 is provided with a circulating water pump 20, the condensation plate can cool the dmf steam, the temperature of the condensation plate can be stabilized between 105 ℃ and 110 ℃, the dmf steam can be condensed, the waste water in the water collection tank is condensed into steam with a temperature above 90 ℃, the circulating water inlet pipe conveys the hot water in the water collection tank into the condensation plate through the circulating water pump, and the hot water in the condensation plate.
The circulating water inlet pipe 19 is provided with a water temperature detector 21, the circulating water inlet pipe 19 is further sleeved with a heating sleeve 22, the heating sleeve 22 is installed on one side close to the condensing plate 17, the water temperature detector 21 is arranged on one side close to the water collecting tank 13, the circulating water outlet pipe 18 is provided with a pressure limiting water valve 23, the pressure limiting water valve controls the pressure of hot water in the condensing plate, the circulating water pump pressurizes, the pressure is increased, the water temperature can rise to 105-plus-110 ℃, the water temperature detector can detect the water temperature in the circulating water inlet pipe, and when the water temperature is lower than 105 ℃, the heating sleeve heats the hot water in the circulating water inlet pipe to 105-plus-110 ℃.
Be equipped with heat dissipation storehouse 24 on the steam blast pipe 26 in the water storage tank 1, heat dissipation storehouse 24 is the platelike structure for having the cavity, heat dissipation storehouse 24 and water storage tank 1 do not communicate with each other, and the steam blast pipe can carry out the condensation heat dissipation with steam through heat dissipation storehouse, reduces the discharge of steam, and the heat dissipation storehouse can also heat the dmf waste liquid in the water storage tank, makes things convenient for subsequent evaporation work.
One side of the water collecting tank 13 is provided with a stirring impeller 25, and the stirring impeller can stir and mix hot water in the water collecting tank.
The working principle and the using method thereof are as follows: s1, adding the dmf waste liquid to be treated in a water storage tank;
s2, injecting clear water at 100 ℃ into the water collecting tank, starting a circulating water pump, enabling the clear water to enter a condensation plate through a circulating water inlet pipe, detecting the water temperature in the circulating water inlet pipe through a water temperature detector, heating the water in the circulating water pipe through a heating sleeve when the water temperature is lower than 100 ℃, pressurizing the water through a pressure limiting water valve and the circulating water pump, and heating the water to 105-110 ℃ through the heating sleeve;
s3, injecting the dmf waste liquid in the water storage tank into the heating tank through the water inlet pump, starting the heating part to heat the dmf waste liquid in the heating tank, controlling the pressure in the heating tank through the pressure limiting air valve, and heating the dmf waste liquid to the temperature of 155-;
s4, allowing heated steam to enter the air chamber through the pressure limiting air valve, allowing the steam to enter the condensation bin from the air chamber, condensing the dmf in the steam by using the condensation plate, allowing the condensed dmf to enter the condensation collection bin through the condensation pipe, allowing the steam to enter the water collection tank through the steam outlet pipe, allowing the steam outlet pipe to penetrate into the water collection tank, and allowing the steam to enter the upper part of the water collection tank through the water in the water collection tank;
s5, steam enters a steam outlet pipe from the water collecting tank and enters a heat dissipation bin through the steam outlet pipe, the heat dissipation bin preheats the dmf waste liquid in the water storage tank, the steam is condensed in the heat dissipation bin, condensed water flows into the water collecting tank, and redundant steam is discharged into the atmosphere;
and S6, when the water level in the water collecting tank rises to the water level switch, the water outlet valve is opened, and the redundant water flows out of the water collecting tank.
Has the advantages that: the dmf extraction apparatus and the treatment method thereof according to the present invention can improve the purity of dmf extraction, reduce the dmf discharge during dmf treatment, reduce energy waste during dmf distillation, and reduce the dmf treatment cost.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. The dmf waste liquid treatment device is characterized by comprising a water storage tank (1), wherein the water storage tank (1) is connected with a heating tank (3) through a water inlet pipe (2), a water inlet one-way valve (4) is arranged on the water inlet pipe (2), a water inlet pump (5) is further arranged on the water inlet pipe (2), a heating part (6) is arranged in the heating tank (3), the heating part (6) is arranged at the bottom of the heating tank (3), a pressure limiting air valve (7) is arranged on the upper part of the heating tank (3), an air chamber (8) is sleeved on the upper part of the heating tank (3), a condensation bin (9) is arranged on one side of the air chamber (8), a condensation pipe (10) is arranged on the lower part of the condensation bin (9), a condensation collection bin (11) is arranged on the lower part of the condensation pipe (10), a steam outlet pipe (12) is arranged on one side of the condensation bin (9), and the steam, steam outlet pipe (12) end stretches into bottom in header tank (13), header tank (13) lower part is equipped with delivery port (14), be equipped with outlet valve (15) on delivery port (14), header tank (13) upper portion is connected and is equipped with steam exhaust pipe (26), steam exhaust pipe (26) stretch into in water storage tank (1), steam exhaust pipe (26) end stretches out water storage tank (1).
2. The dmf waste treatment apparatus and method according to claim 1, wherein a water level switch (16) is arranged in the water collecting tank (13), and the water level switch (16) is connected with the water outlet valve (15).
3. The dmf waste liquid treatment device and the treatment method thereof according to claim 1, wherein a condensation plate (17) is arranged in the condensation bin (9), a circulating water outlet pipe (18) is arranged on one side of the lower part of the water collection tank (13), the circulating water outlet pipe (18) is connected with one end, far away from the air chamber (8), of the condensation plate (17), a circulating water inlet pipe (19) is further arranged on the water collection tank (13) on one side of the circulating water outlet pipe (18), the circulating water inlet pipe (19) is connected with one end, close to the air chamber (8), of the condensation plate (17), and a circulating water pump (20) is arranged on the circulating water inlet pipe (19).
4. The dmf waste liquid treatment device and the treatment method thereof according to claim 3, wherein a water temperature detector (21) is arranged on the circulating water inlet pipe (19), a heating sleeve (22) is further sleeved on the circulating water inlet pipe (19), the heating sleeve (22) is installed at one side close to the condensation plate (17), the water temperature detector (21) is arranged at one side close to the water collecting tank (13), and a pressure limiting water valve (23) is arranged on the circulating water outlet pipe (18).
5. The dmf waste liquid treatment device and the treatment method thereof according to claim 1, wherein a heat dissipation bin (24) is arranged on the steam exhaust pipe (26) in the water storage tank (1), the heat dissipation bin (24) is a plate-shaped structure with a cavity, and the heat dissipation bin (24) and the water storage tank (1) are not communicated with each other.
6. The dmf waste treatment apparatus according to claim 1, wherein one side of the water collecting tank (13) is provided with a stirring impeller (25).
7. A method of treatment with the dmf waste solution treatment apparatus according to any one of claims 1 to 6, comprising the steps of:
s1, adding the dmf waste liquid to be treated in a water storage tank;
s2, injecting clear water at 100 ℃ into the water collecting tank, starting a circulating water pump, enabling the clear water to enter a condensation plate through a circulating water inlet pipe, detecting the water temperature in the circulating water inlet pipe through a water temperature detector, heating the water in the circulating water pipe through a heating sleeve when the water temperature is lower than 100 ℃, pressurizing the water through a pressure limiting water valve and the circulating water pump, and heating the water to 105-110 ℃ through the heating sleeve;
s3, injecting the dmf waste liquid in the water storage tank into the heating tank through the water inlet pump, starting the heating part to heat the dmf waste liquid in the heating tank, controlling the pressure in the heating tank through the pressure limiting air valve, and heating the dmf waste liquid to the temperature of 155-;
s4, allowing heated steam to enter the air chamber through the pressure limiting air valve, allowing the steam to enter the condensation bin from the air chamber, condensing the dmf in the steam by using the condensation plate, allowing the condensed dmf to enter the condensation collection bin through the condensation pipe, allowing the steam to enter the water collection tank through the steam outlet pipe, allowing the steam outlet pipe to penetrate into the water collection tank, and allowing the steam to enter the upper part of the water collection tank through the water in the water collection tank;
s5, steam enters a steam outlet pipe from the water collecting tank and enters a heat dissipation bin through the steam outlet pipe, the heat dissipation bin preheats the dmf waste liquid in the water storage tank, the steam is condensed in the heat dissipation bin, condensed water flows into the water collecting tank, and redundant steam is discharged into the atmosphere;
and S6, when the water level in the water collecting tank rises to the water level switch, the water outlet valve is opened, and the redundant water flows out of the water collecting tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911122726.1A CN110755867A (en) | 2019-11-16 | 2019-11-16 | Dmf waste liquid treatment device and treatment method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911122726.1A CN110755867A (en) | 2019-11-16 | 2019-11-16 | Dmf waste liquid treatment device and treatment method thereof |
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| US3467580A (en) * | 1965-08-12 | 1969-09-16 | Raffinage Cie Franc De | Alkylamide-water distillation and amine neutralization of acid formed |
| CN101703840A (en) * | 2009-11-19 | 2010-05-12 | 天津大学 | Four-effect rectification system for synthesizing leather dimethyl formamide solution by wet method and recovery method |
| CN202860155U (en) * | 2012-10-26 | 2013-04-10 | 镇江铁科橡塑制品有限公司 | Waste gas recycle and rectification device |
| CN103611328A (en) * | 2013-12-03 | 2014-03-05 | 天津市创举科技有限公司 | Process for extracting naphthalene by continuously rectifying heavy benzol |
| CN203899185U (en) * | 2014-02-24 | 2014-10-29 | 浙江闽锋化学有限公司 | Leather synthesis waste gas collecting and treating device |
| CN104815447A (en) * | 2015-04-14 | 2015-08-05 | 常州冀德环保科技有限公司 | DMAC (dimethylacetamide) or DMF (dimethyl formamide) waste liquid four-tower double-effect rectification system and recovery method thereof |
| CN105964005A (en) * | 2016-04-22 | 2016-09-28 | 常州博睿杰能环境技术有限公司 | Split type MVR heat pump rectification heat integration system |
| WO2020018165A1 (en) * | 2018-07-20 | 2020-01-23 | Rj Lee Group, Inc. | Methods and apparatus for clarification of pyrolysis oils |
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2019
- 2019-11-16 CN CN201911122726.1A patent/CN110755867A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3467580A (en) * | 1965-08-12 | 1969-09-16 | Raffinage Cie Franc De | Alkylamide-water distillation and amine neutralization of acid formed |
| CN101703840A (en) * | 2009-11-19 | 2010-05-12 | 天津大学 | Four-effect rectification system for synthesizing leather dimethyl formamide solution by wet method and recovery method |
| CN202860155U (en) * | 2012-10-26 | 2013-04-10 | 镇江铁科橡塑制品有限公司 | Waste gas recycle and rectification device |
| CN103611328A (en) * | 2013-12-03 | 2014-03-05 | 天津市创举科技有限公司 | Process for extracting naphthalene by continuously rectifying heavy benzol |
| CN203899185U (en) * | 2014-02-24 | 2014-10-29 | 浙江闽锋化学有限公司 | Leather synthesis waste gas collecting and treating device |
| CN104815447A (en) * | 2015-04-14 | 2015-08-05 | 常州冀德环保科技有限公司 | DMAC (dimethylacetamide) or DMF (dimethyl formamide) waste liquid four-tower double-effect rectification system and recovery method thereof |
| CN105964005A (en) * | 2016-04-22 | 2016-09-28 | 常州博睿杰能环境技术有限公司 | Split type MVR heat pump rectification heat integration system |
| WO2020018165A1 (en) * | 2018-07-20 | 2020-01-23 | Rj Lee Group, Inc. | Methods and apparatus for clarification of pyrolysis oils |
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Application publication date: 20200207 |