CN204022585U - Hexamethylolmelamine Waste Water Treatment - Google Patents
Hexamethylolmelamine Waste Water Treatment Download PDFInfo
- Publication number
- CN204022585U CN204022585U CN201320863491.3U CN201320863491U CN204022585U CN 204022585 U CN204022585 U CN 204022585U CN 201320863491 U CN201320863491 U CN 201320863491U CN 204022585 U CN204022585 U CN 204022585U
- Authority
- CN
- China
- Prior art keywords
- waste water
- hexamethylolmelamine
- treatment
- formaldehyde
- supernatant liquor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 33
- YGCOKJWKWLYHTG-UHFFFAOYSA-N [[4,6-bis[bis(hydroxymethyl)amino]-1,3,5-triazin-2-yl]-(hydroxymethyl)amino]methanol Chemical compound OCN(CO)C1=NC(N(CO)CO)=NC(N(CO)CO)=N1 YGCOKJWKWLYHTG-UHFFFAOYSA-N 0.000 title claims abstract description 32
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000002351 wastewater Substances 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000006228 supernatant Substances 0.000 claims abstract description 16
- 238000001556 precipitation Methods 0.000 claims abstract description 13
- 238000000967 suction filtration Methods 0.000 claims abstract description 11
- 239000000047 product Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 7
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 150000007529 inorganic bases Chemical class 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 239000012752 auxiliary agent Substances 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 description 2
- 229930040373 Paraformaldehyde Natural products 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000008098 formaldehyde solution Substances 0.000 description 2
- -1 imino- Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920002866 paraformaldehyde Polymers 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Hexamethylolmelamine Waste Water Treatment, this treatment system comprises: wastewater treatment still, receives hexamethylolmelamine waste water, trimeric cyanamide and catalyzer, and after mixing therein, reacting, obtain waste water after crystallisate and preliminary treatment; Multifeed clarifier, receives in wastewater treatment still waste water after preliminary treatment out, and carries out successively being therein precipitated thing and supernatant liquor after precipitation process; Formaldehyde absorbing tower, receives last step settling tank supernatant liquor out, and the formaldehyde in supernatant liquor is absorbed; And suction filtration machine, receive throw out out in settling tanks at different levels, it is carried out to suction filtration to obtain solids product and liquid.Utilize treatment system of the present utility model hexamethylolmelamine waste water to be reacted and the operation such as precipitation, throw out recycle, formaldehyde recovery, reach the object of hexamethylolmelamine wastewater zero discharge, whole treating processes is simple, pollution-free, and energy consumption is low.
Description
Technical field
The utility model relates to chemical wastewater treatment system, is specifically related to hexamethylolmelamine Waste Water Treatment.
Background technology
Hexamethylolmelamine is at building coating, automobile sizing agent raw material, high performance adhesive, coating dose, clothing finishing composition, high performance composite and process its downstream fine chemical product and have a wide range of applications.At present, the enterprise that produces hexamethylolmelamine adopts trimeric cyanamide and formaldehyde solution under alkaline condition, after HM, dehydration obtains product, this technology exists aldehyde-containing sewage many, formaldehyde content is lower, can not be directly used in the production of hexamethylolmelamine, many medium-sized and small enterprises are direct formaldehyde emission waste water often, and a large amount of formaldehyde waste waters causes huge pollution to environment.
In order to solve large, the unmanageable problem of traditional method wastewater flow rate, CN101786995A discloses a kind of preparation method of granular hexamethylol melamine, proposition replaces formaldehyde solution to produce hexamethylolmelamine with paraformaldehyde, there are following two problems in the method: 1) need to carry out strict control to the amount of washing lotion and just can guarantee formaldehydeless waste water, once generation waste water, process the difficulty that will become, can not fundamentally solve the processing problem of waste water; 2) paraformaldehyde is expensive, is not suitable for large-scale commercial production.
CN102010380A is in order to solve the problems such as wastewater treatment difficulty, proposition adds evaporation auxiliary agent formate in formaldehyde waste water, under 50～70 ℃, 0.01～0.03MPa condition, carry out evaporation process, again concentrated solution is sent back to reactor reaction, vaporize water is the washing soln when centrifugal, thereby reaches the recycle of waste water.Although the method is successfully recycled waste water, but there is following problem: 1) impurity sends into, at waste water evaporative concentration stage of saline, need to add a large amount of evaporation auxiliary agents, and the prolongation along with the waste water circulation time, the content that evaporates auxiliary agent formate in waste water will increase gradually, even can affect the carrying out of whole reaction; 2) evaporating concentration process is to carry out under 50～70 ℃, the condition of 0.01～0.03MPa, except producing a large amount of tail gas, also larger to the demand of the energy.
Although above-mentioned two kinds of processing modes can be recycled comparatively thoroughly to hexamethylolmelamine waste water, whole process condition is comparatively harsh, complicated, efficiency is lower, be not suitable for scale operation.
Summary of the invention
The purpose of this utility model is to overcome the difficult point in existing hexamethylolmelamine wastewater treatment, and novel hexamethylolmelamine Waste Water Treatment is provided.
According to hexamethylolmelamine Waste Water Treatment of the present utility model, comprise:
Wastewater treatment still, receives hexamethylolmelamine waste water, trimeric cyanamide and catalyzer, and after mixing therein, reacting, obtains waste water after crystallisate and preliminary treatment;
Multifeed clarifier, is connected to receive in wastewater treatment still waste water after preliminary treatment out, and carries out successively being therein precipitated thing and supernatant liquor after precipitation process with wastewater treatment still;
Formaldehyde absorbing tower, is connected to receive last step settling tank supernatant liquor out with the last step settling tank of described multifeed clarifier, and the formaldehyde in supernatant liquor is absorbed; And
Suction filtration machine, be connected with the settling tanks at different levels of described multifeed clarifier respectively and receive in settling tanks at different levels throw out out, it is carried out to suction filtration to obtain solids product and liquid, liquid after suction filtration is turned back to last step settling tank and carry out circular treatment, solids product is after drying as the raw material of producing the high methyl-etherified melmac of high imino-.
Under preferable case, multifeed clarifier is level Four settling tank.
Under preferable case, this treatment system also comprises whizzer, is connected to receive crystallisate out in wastewater treatment still with wastewater treatment still, it is carried out centrifugal to obtain crystallisate product.
Utilize hexamethylolmelamine Waste Water Treatment of the present utility model, by waste water being reacted and the operation such as precipitation, throw out recycle, formaldehyde absorption utilization, reach the object of hexamethylolmelamine wastewater zero discharge, whole treating processes is simple, pollution-free, energy consumption is low, and processing efficiency is high.
Accompanying drawing explanation
Fig. 1 is according to the process flow diagram of hexamethylolmelamine Waste Water Treatment of the present utility model.
Embodiment
Below in conjunction with accompanying drawing 1, describe principle of work of the present utility model and operating process in detail.
As shown in Figure 1, the technical process of hexamethylolmelamine Waste Water Treatment of the present utility model is as follows.
The first step, sends into wastewater treatment still by the waste water 1 of producing hexamethylolmelamine generation by pipeline, mainly contains low hydroxyl thing, formaldehyde and water in this waste water, and the massfraction of low hydroxyl thing is generally 3-4%, and the massfraction of formaldehyde is generally 6-9%.The melamine 2 and a certain amount of inorganic base catalyst 3 that by hexamethylolmelamine waste water per ton, add 5-9kg, the preferred sodium bicarbonate of inorganic base catalyst 3, the add-on of inorganic base catalyst 3 is controlled at the p H value of reaction soln is remained between 8-9.After above-mentioned material mixes in wastewater treatment still, trimeric cyanamide 2 reacts under the catalysis of inorganic base catalyst 3 with formaldehyde, low hydroxyl thing and formaldehyde also further react under the catalysis of inorganic base catalyst 3 simultaneously, after above-mentioned reaction occurs, generate crystallisate 4, crystallisate 4 main components are hexamethylolmelamine.After standing for some time, at the bottom of crystallisate 4 is deposited in wastewater treatment still still, upper strata is waste water 5 after preliminary treatment.After the preliminary treatment of wastewater treatment still, the formaldehyde content in waste water 5 not only reduces (content is reduced to 2-4% from 6-9%) greatly, can also obtain a certain amount of hexamethylolmelamine crystallisate 4 simultaneously.
Second step, waste water after the preliminary treatment at the middle and upper levels of wastewater treatment still 5 is introduced to level Four settling tank and carry out successively precipitation process, and the crystallisate 4 at the bottom of wastewater treatment still still is sent into whizzer and carry out centrifuge dehydration, after dehydration, obtaining main component is hexamethylolmelamine product 6, and the waste liquid 7 after centrifugation is also sent into level Four settling tank.The process of level Four precipitation is: after preliminary treatment, waste water 5 first precipitates through first step settling tank, after precipitation, obtain first step settling tank throw out 8 and first step settling tank supernatant liquor, then will introduce second stage settling tank with one-level settling tank supernatant liquor, after precipitation, obtain second stage settling tank throw out 8 and second stage settling tank supernatant liquor, the like, finally obtain fourth stage settling tank throw out 8 and fourth stage settling tank supernatant liquor 9.The time of every grade of precipitation of level Four settling tank is respectively 3～4,5～6,6～7,8～9 hours.In level Four precipitation process, what the reaction described in the first step did not react completely will proceed, after level Four settling tank precipitation process, low hydroxyl thing in waste water has obtained sufficient precipitation, in fourth stage settling tank, in supernatant liquor 9, substantially do not contained low hydroxyl thing, formaldehyde content wherein has also dropped to 1-3%.
The 3rd step, sends fourth stage settling tank supernatant liquor 9 into formaldehyde absorbing tower, and formaldehyde absorbing tower carries out recycling to the formaldehyde in supernatant liquor 9 and water.Through formaldehyde absorbing tower, the formaldehyde in waste water has been carried out absorbing completely, realized the thorough pollution-free utilization of waste water.
The 4th step, throw out 8 in every grade of settling tank is processed, in throw out 8, main component is low hydroxyl thing, can be sent into suction filtration machine and be carried out suction filtration, after suction filtration, obtain solids product 10 (after drying as the raw material of producing the high methyl-etherified melmac of high imino-) and liquid 11, the liquid after suction filtration 11 is turned back to fourth stage settling tank and carry out circular treatment.
By the processing of above step, not only the low hydroxyl thing of useful component in hexamethylolmelamine waste water and formaldehyde have been carried out to recycling, realized wastewater zero discharge; And whole process operation is simple, cost is low.
It will be appreciated by those skilled in the art that foregoing description, just in order to understand better the utility model, is not that the utility model is made to any restriction.
Claims (3)
1. a hexamethylolmelamine Waste Water Treatment, mainly contains low hydroxyl thing, formaldehyde and water in hexamethylolmelamine waste water, it is characterized in that, this treatment system comprises:
Wastewater treatment still, receives hexamethylolmelamine waste water, trimeric cyanamide and catalyzer, and after mixing therein, reacting, obtains waste water after crystallisate and preliminary treatment;
Multifeed clarifier, is connected to receive in wastewater treatment still waste water after preliminary treatment out, and carries out successively being therein precipitated thing and supernatant liquor after precipitation process with wastewater treatment still;
Formaldehyde absorbing tower, is connected to receive last step settling tank supernatant liquor out with the last step settling tank of described multifeed clarifier, and the formaldehyde in supernatant liquor is absorbed; And
Suction filtration machine, is connected with the settling tanks at different levels of described multifeed clarifier respectively and receives in settling tanks at different levels throw out out, and it is carried out to suction filtration to obtain solids product and liquid.
2. hexamethylolmelamine Waste Water Treatment according to claim 1, is characterized in that, multifeed clarifier is level Four settling tank.
3. hexamethylolmelamine Waste Water Treatment according to claim 1, is characterized in that, also comprises whizzer, is connected to receive crystallisate out in wastewater treatment still with wastewater treatment still, it is carried out centrifugal to obtain crystallisate product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863491.3U CN204022585U (en) | 2013-12-25 | 2013-12-25 | Hexamethylolmelamine Waste Water Treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863491.3U CN204022585U (en) | 2013-12-25 | 2013-12-25 | Hexamethylolmelamine Waste Water Treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204022585U true CN204022585U (en) | 2014-12-17 |
Family
ID=52062477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320863491.3U Expired - Lifetime CN204022585U (en) | 2013-12-25 | 2013-12-25 | Hexamethylolmelamine Waste Water Treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204022585U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110711763A (en) * | 2019-10-25 | 2020-01-21 | 嘉兴双军环保科技有限公司 | Phosphorization slag innocent treatment system |
-
2013
- 2013-12-25 CN CN201320863491.3U patent/CN204022585U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110711763A (en) * | 2019-10-25 | 2020-01-21 | 嘉兴双军环保科技有限公司 | Phosphorization slag innocent treatment system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101906196B (en) | Comprehensive utilization method of phenolic resin wastewater | |
| CN103588329A (en) | Condensation mother liquid waste water pretreatment and resource system and method in compound neutralization reactor in disperse blue 56 production process | |
| CN111847744B (en) | System and method for treating high-salt organic wastewater in ion exchange resin production | |
| CN107162034B (en) | A kind of system and technique preparing nano-calcium carbonate and amino compound fertilizer using the coal chemical industry three wastes | |
| CN204022585U (en) | Hexamethylolmelamine Waste Water Treatment | |
| CN106348267B (en) | A kind of method and device of Nitrogen-and Phosphorus-containing waste water production Diammonium phosphate (DAP) | |
| CN203436980U (en) | Device for treating waste gas in diammonium phosphate production | |
| CN102423695B (en) | Straw cellulose-polyhydroxyaluminium salt phosphorus removal adsorbent capable of completely being degraded, and manufacturing method thereof | |
| CN103318918A (en) | Method for purification and recovery of ammonia gas | |
| CN203922884U (en) | Containing formaldehyde industrial wastewater treatment system | |
| CN103723860B (en) | Hexamethylolmelamine method of wastewater treatment and treatment system thereof | |
| CN102206014A (en) | Process for treating wastewater from sodium carboxymethylcellulose production and comprehensively utilizing valuable components | |
| CN101591084B (en) | Method for treating glyphosate waste water and reducing the emission of carbon dioxide | |
| CN105236365B (en) | The method that waste liquid produces hydroxylamine hydrochloride is absorbed using industrial tail gas | |
| CN204384885U (en) | Waste Sulfuric Acid waste water produces the treatment system of ammonium sulfate | |
| CN107935151B (en) | Coal slime water treatment method | |
| CN104211106B (en) | A kind of carbonated rare earth preparation method not producing ammonia nitrogen waste water | |
| CN106967192B (en) | A kind of technique of calcium carbide production PVC | |
| CN109456463A (en) | A kind of phenolic hydroxyl group epoxidation technique | |
| CN111252980A (en) | Method for treating dilute acid in purification section of acid production device | |
| CN208265798U (en) | Taurine wastewater zero discharge processing unit | |
| CN112062100A (en) | Nano calcium peroxide, preparation method and application | |
| CN202246111U (en) | Equipment for recovering ammonium sulfate | |
| CN203923065U (en) | Tetra methylol trimeric cyanamide and hexamethylolmelamine co-generation system | |
| CN203922752U (en) | A kind of device that removes ammonium sulfate and calcium carbonate mixture slurry free ammonia |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141217 |
|
| CX01 | Expiry of patent term |