CN103030183B - Device and method for recycling waste water for washing plate frame for pentaerythritol - Google Patents
Device and method for recycling waste water for washing plate frame for pentaerythritol Download PDFInfo
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- CN103030183B CN103030183B CN201210572968.2A CN201210572968A CN103030183B CN 103030183 B CN103030183 B CN 103030183B CN 201210572968 A CN201210572968 A CN 201210572968A CN 103030183 B CN103030183 B CN 103030183B
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- sheet frame
- waste water
- tetramethylolmethane
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Abstract
The invention provides a device and a method for recycling waste water for washing a plate frame for pentaerythritol. The treatment method comprises the following steps that 1), the waste water for washing the filter plate frame is collected and then introduced into a dissolving kettle, the dissolving kettle is kept at 80-100 DEG C, liquid in the dissolving kettle enters the filter plate frame through a pump, the filter plate frame is washed repeatedly by the liquid, circulation is formed between the filter plate frame and the dissolving kettle, the concentration of pentaerythritol in the waste water is increased, and the concentration of pentaerythritol in the liquid in the dissolving kettle is detected; and 2), when the mass concentration of pentaerythritol reaches 5-20%, a liquid material is introduced into a hydrolysis kettle through a dissolving kettle pump, acid is added to the hydrolysis kettle, stirring is conducted, the temperature rises to 90-110 DEG C and is kept for 1-2h, methanol and methanal are discharged, and the rest of liquid is subjected to pentaerythritol separation and purification. According to the device and the method, the waste water for washing the plate frame in pentaerythritol production is collected, and then hydrolyzed and recycled after reaching a certain concentration, and no secondary pollution is generated.
Description
Technical field
The present invention relates to the device and method that a kind of tetramethylolmethane washes the utilization of sheet frame waste water reclamation.
Background technology
In existing Production of pentaerythritol, an important step is filtered exactly, wherein once mother liquor filtration, secondary mother liquid filtration, clear liquid filtration etc., subsequent processing process waited until by filtrate after filtration and filter cake, but on filter cloth, speckle with a lot of solid materials, affect next filtration velocity and precision, need with a large amount of hot water, filter cloth washing is clean after reuse.Waste water after these cleaning filter clothes because of the material concentrations such as wherein tetramethylolmethane low; the foreign matter contents such as acetal, tetramethylolmethane methyl ether are high; direct recovery is often lost more than gain; affect the production of tetramethylolmethane; pentaerythritol quality is caused to decline; every consumption such as steam is risen; therefore general producer all directly emission treatment; affect environment protection on the one hand; cause the high expensive of Production of pentaerythritol on the other hand; therefore how effectively to handle this waste water well, the pressure of environmental protection can either be effectively reduced, also will produce certain economic benefit simultaneously.
Summary of the invention
The object of this invention is to provide the device and method that a kind of tetramethylolmethane washes the utilization of sheet frame waste water reclamation, washing sheet frame waste water by collecting in Production of pentaerythritol, after reaching finite concentration, hydrolysis is recycled, and turns waste into wealth, and does not produce secondary pollution.
The object of the present invention is achieved like this: a kind of tetramethylolmethane washes the device that sheet frame waste water reclamation utilizes, and comprises the filtration sheet frame connected successively, molten material still and hydrolysis kettle, filters between sheet frame and molten material still and form the recycle system.
The bottom of described molten material still is connected respectively to the top of filtering sheet frame and molten material still by pipeline, molten material still bottom pipe is provided with molten material still pump.
Described hydrolysis kettle is provided with outer circulation pipeline and hydrolysis kettle pump, and hydrolysis kettle top is also provided with vapor pipe and feed-pipe.
Described molten material still and hydrolysis kettle are equipped with water back.
Tetramethylolmethane washes the method that sheet frame waste water reclamation utilizes, and comprises the following steps:
1) molten material still will be introduced after the wastewater collection of cleaning and filtering sheet frame, keep molten material still temperature 80-100 DEG C, in molten material still, liquid is entered by pump and to filter in sheet frame cleaning and filtering sheet frame repeatedly, circulation is formed between filtration sheet frame and molten material still, increase tetramethylolmethane in waste water concentration, detect the concentration of tetramethylolmethane in molten material still liquid;
2) when the mass concentration of tetramethylolmethane reaches 5-20%, liquid material is introduced in hydrolysis kettle by molten material still pump, to hydrolysis kettle acid adding, in controlled hydrolysis still, pH value is between 2.0-2.5, be warmed up to 90-110 DEG C, keep temperature 1-2 hour, then discharge methyl alcohol and formaldehyde, remaining liquid carries out the separating-purifying of tetramethylolmethane.
Described acid is formic acid, phosphoric acid or hydrochloric acid.
A kind of tetramethylolmethane provided by the invention washes the device and method that sheet frame waste water reclamation utilizes, technical process is short, filter operation in Production of pentaerythritol can be washed sheet frame waste water reclamation and utilize, turn waste into wealth, and do not produce secondary pollution, accomplish the comprehensive utilization of resource; The device adopted only need increase molten material still, hydrolysis kettle and recycle pump just can reach the object of washing sheet frame waste water reclamation and utilizing, and drop into little, production cost is low, and crucible, hydrolysis kettle are equipped with self outer circulation pipeline in addition, and material can be allowed fully to dissolve.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is structural representation of the present invention.
In figure, 1, filter sheet frame, 2, molten material still, 3, hydrolysis kettle, 4-1, molten material still pump, 4-2, hydrolysis kettle pump.
Embodiment
Tetramethylolmethane washes the device that sheet frame waste water reclamation utilizes, and comprises the filtration sheet frame 1 connected successively, molten material still 2 and hydrolysis kettle 3, filters between sheet frame 1 and molten material still 2 and forms the recycle system.
The bottom of described molten material still is connected respectively to the top of filtering sheet frame and molten material still by pipeline, molten material still bottom pipe is provided with molten material still pump 4-1.
Described hydrolysis kettle is provided with outer circulation pipeline and hydrolysis kettle pump 4-2, and hydrolysis kettle top is also provided with vapor pipe and feed-pipe.
Described molten material still and hydrolysis kettle are equipped with water back, pass into steam and heat it in water back.
Tetramethylolmethane washes the method that sheet frame waste water reclamation utilizes, and comprises the following steps:
1) will introduce molten material still after the wastewater collection of cleaning and filtering sheet frame, keep molten material still temperature 80-100 DEG C, in molten material still, a liquid part is entered by pump and to filter in sheet frame cleaning and filtering sheet frame repeatedly, between filtration sheet frame and molten material still, form circulation; Another part is directly circulated by the top of pipeline from molten material still, increase tetramethylolmethane in waste water concentration, detect the concentration of tetramethylolmethane in molten material still liquid;
2) when the mass concentration of tetramethylolmethane reaches 5-20%, liquid material is introduced in hydrolysis kettle by molten material still pump, to hydrolysis kettle acid adding, in controlled hydrolysis still, pH value is between 2.0-2.5, be warmed up to 90-110 DEG C, keep temperature 1-2 hour, then discharge methyl alcohol and formaldehyde, remaining liquid carries out the separating-purifying of tetramethylolmethane.
Claims (1)
1. tetramethylolmethane washes the device that sheet frame waste water reclamation utilizes, and it is characterized in that: comprise the filtration sheet frame connected successively, molten material still and hydrolysis kettle, filters between sheet frame and molten material still and forms the recycle system; The bottom of described molten material still is connected respectively to the top of filtering sheet frame and molten material still by pipeline, molten material still bottom pipe is provided with molten material still pump; Described hydrolysis kettle is provided with outer circulation pipeline and hydrolysis kettle pump, and hydrolysis kettle top is also provided with vapor pipe and feed-pipe; Described molten material still and hydrolysis kettle are equipped with water back;
The concrete operation step of this device is:
1) molten material still will be introduced after the wastewater collection of cleaning and filtering sheet frame, keep molten material still temperature 80-100 DEG C, in molten material still, liquid is entered by pump and to filter in sheet frame cleaning and filtering sheet frame repeatedly, circulation is formed between filtration sheet frame and molten material still, increase tetramethylolmethane in waste water concentration, detect the concentration of tetramethylolmethane in molten material still liquid;
2) when the mass concentration of tetramethylolmethane reaches 5-20%, liquid material is introduced in hydrolysis kettle by molten material still pump, phosphoric acid or hydrochloric acid is added to hydrolysis kettle, in controlled hydrolysis still, pH value is between 2.0-2.5, stirring is warmed up to 90-110 DEG C, keep temperature 1-2 hour, then discharge methyl alcohol and formaldehyde, remaining liquid carries out the separating-purifying of tetramethylolmethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210572968.2A CN103030183B (en) | 2011-12-27 | 2012-12-26 | Device and method for recycling waste water for washing plate frame for pentaerythritol |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110442901 | 2011-12-27 | ||
| CN201110442901.2 | 2011-12-27 | ||
| CN201210572968.2A CN103030183B (en) | 2011-12-27 | 2012-12-26 | Device and method for recycling waste water for washing plate frame for pentaerythritol |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103030183A CN103030183A (en) | 2013-04-10 |
| CN103030183B true CN103030183B (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210572968.2A Active CN103030183B (en) | 2011-12-27 | 2012-12-26 | Device and method for recycling waste water for washing plate frame for pentaerythritol |
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| CN (1) | CN103030183B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365340B (en) * | 2016-08-30 | 2019-08-06 | 安徽金禾实业股份有限公司 | A kind of pentaerythrite vibrating membrane sewage water treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4277620A (en) * | 1980-02-29 | 1981-07-07 | Virginia Chemicals Inc. | Byproduct recovery from a pentaerythritol waste stream |
| CN1091723A (en) * | 1993-03-01 | 1994-09-07 | 衡阳市环境保护科学研究所 | The method of wastewater treatment that contains tetramethylolmethane |
| CN101696158A (en) * | 2009-09-30 | 2010-04-21 | 濮阳市鹏鑫化工有限公司 | Method for preparing pentaerythritol and dipentaerythritol |
| CN102070413A (en) * | 2010-12-23 | 2011-05-25 | 安徽金禾实业股份有限公司 | Method for synthesizing dipentaerythritol |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0616585A (en) * | 1992-07-01 | 1994-01-25 | Mitsui Toatsu Chem Inc | Production of dipentaerythritol |
-
2012
- 2012-12-26 CN CN201210572968.2A patent/CN103030183B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4277620A (en) * | 1980-02-29 | 1981-07-07 | Virginia Chemicals Inc. | Byproduct recovery from a pentaerythritol waste stream |
| CN1091723A (en) * | 1993-03-01 | 1994-09-07 | 衡阳市环境保护科学研究所 | The method of wastewater treatment that contains tetramethylolmethane |
| CN101696158A (en) * | 2009-09-30 | 2010-04-21 | 濮阳市鹏鑫化工有限公司 | Method for preparing pentaerythritol and dipentaerythritol |
| CN102070413A (en) * | 2010-12-23 | 2011-05-25 | 安徽金禾实业股份有限公司 | Method for synthesizing dipentaerythritol |
Non-Patent Citations (3)
| Title |
|---|
| JP特开平6-16585A 1994.01.25 * |
| 加压水解法处理回收季戊四醇及母液;程丽敏;《河南化工》;20041231(第5期);正文第25页右栏第2段至第26页右栏最后1段及表1 * |
| 回收季戊四醇的处理方法;程丽敏;《河南化工》;20001231(第3期);第25-26页 * |
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| CN103030183A (en) | 2013-04-10 |
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