CN203922884U - Containing formaldehyde industrial wastewater treatment system - Google Patents
Containing formaldehyde industrial wastewater treatment system Download PDFInfo
- Publication number
- CN203922884U CN203922884U CN201320863274.4U CN201320863274U CN203922884U CN 203922884 U CN203922884 U CN 203922884U CN 201320863274 U CN201320863274 U CN 201320863274U CN 203922884 U CN203922884 U CN 203922884U
- Authority
- CN
- China
- Prior art keywords
- formaldehyde
- wastewater treatment
- industrial wastewater
- treatment system
- still
- 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
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 188
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 39
- 239000010842 industrial wastewater Substances 0.000 title claims abstract description 25
- 239000002351 wastewater Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 239000006228 supernatant Substances 0.000 claims abstract description 15
- 238000001556 precipitation Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 claims abstract description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 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 description 8
- 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
- 238000004064 recycling 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
- 239000000203 mixture 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
- 238000005516 engineering process Methods 0.000 description 2
- 239000008098 formaldehyde solution Substances 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 229920002866 paraformaldehyde Polymers 0.000 description 2
- 239000002994 raw material Substances 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
- 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
- 239000007788 liquid Substances 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 238000005360 mashing Methods 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
- 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)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Containing formaldehyde industrial wastewater treatment system, this treatment system comprises: wastewater treatment still, receives containing formaldehyde industrial wastewater, 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 mixing tank, it is formaldehyde and the last step settling tank supernatant liquor out of 40-70% massfraction that formaldehyde mixing tank receives concentration, and mixes therein the formaldehyde that production concentration is 35-40% massfraction; And throw out return mechanism, receive throw out out in settling tanks at different levels, and return it in wastewater treatment still and react.According to treatment system of the present utility model, to processing containing formaldehyde industrial wastewater, reach the object containing formaldehyde industrial wastewater zero release, 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 containing formaldehyde industrial wastewater treatment system.
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 to recycling comparatively thoroughly containing formaldehyde industrial wastewater, whole process condition is comparatively harsh, complicated, efficiency is lower, be not suitable for scale operation.
Utility model content
The purpose of this utility model is to overcome existing difficult point in processing containing formaldehyde industrial wastewater, and provides novel containing formaldehyde industrial wastewater treatment system.
According to of the present utility model, containing formaldehyde industrial wastewater treatment system, comprise:
Wastewater treatment still, receives containing formaldehyde industrial wastewater, 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 mixing tank, receiving concentration is the formaldehyde of 40-70% massfraction, and be connected to receive last step settling tank supernatant liquor out with the last step settling tank of described multifeed clarifier, and mix therein the formaldehyde that production concentration is 35-40% massfraction; And
Throw out return mechanism, 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 is connected that with wastewater treatment still throw out out in settling tanks at different levels is turned back in wastewater treatment still and reacted,
Under preferable case, multifeed clarifier is level Four settling tank.
Under preferable case, also comprise whizzer, be connected to receive crystallisate out in wastewater treatment still with wastewater treatment still, it is carried out centrifugal to obtain crystallisate product.
Utilize of the present utility modelly containing formaldehyde industrial wastewater treatment system, by waste water being reacted and the operation such as precipitation, throw out recycle, formaldehyde recycling, reach the object containing formaldehyde industrial wastewater zero release, 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 containing formaldehyde industrial wastewater treatment system 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 containing formaldehyde industrial wastewater treatment system of the present utility model is as follows.
The first step, will send into wastewater treatment still by pipeline containing formaldehyde industrial wastewater 1, mainly contain 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%.By melamine 2 and a certain amount of inorganic base catalyst 3 that adds 5-9kg containing formaldehyde industrial wastewater per ton, the preferred sodium bicarbonate of inorganic base catalyst 3, the add-on of inorganic base catalyst 3 is controlled at the pH 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.Formaldehyde content after the preliminary treatment of wastewater treatment still 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 first step settling tank supernatant liquor is introduced to second stage settling tank, 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 mixing tank.Formaldehyde mixing tank receives high-concentration formaldehyde (for example concentration is the formaldehyde of 40-70% massfraction) and supernatant liquor 9, and mix therein the formaldehyde that production concentration is 35-40% massfraction, the formaldehyde products of this concentration is very suitable for the generally application in industry; High-concentration formaldehyde and supernatant liquor 9 also can be is in advance the formaldehyde of 35-40% massfraction by being connected that the transport pipe of last step settling tank and formaldehyde mixing tank carries out entering formaldehyde mixing tank production concentration after pre-mixing again, thereby reduce the mixing time of formaldehyde mixing tank, enhance productivity.Through formaldehyde mixing tank, the formaldehyde in waste water has been carried out recycling completely, realized the thorough pollution-free utilization of waste water.
The 4th step, processes the throw out 8 in every grade of settling tank, and in throw out 8, main component is low hydroxyl thing, can be used as raw material and for example, is returned it in wastewater treatment still and reacted by throw out return mechanism (mashing pump).
By the processing of above step, not only, to having carried out recycling containing the low hydroxyl thing of useful component in formaldehyde industrial wastewater and formaldehyde, 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 (4)
1. containing a formaldehyde industrial wastewater treatment system, containing in formaldehyde industrial wastewater, mainly contain low hydroxyl thing, formaldehyde and water, it is characterized in that, this treatment system comprises:
Wastewater treatment still, receives containing formaldehyde industrial wastewater, 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 mixing tank, receiving concentration is the formaldehyde of 40-70% massfraction, and be connected to receive last step settling tank supernatant liquor out with the last step settling tank of described multifeed clarifier, and mix therein the formaldehyde that production concentration is 35-40% massfraction; And
Throw out return mechanism, 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 is connected that with wastewater treatment still throw out out in settling tanks at different levels is turned back in wastewater treatment still and reacted.
2. the formaldehyde industrial wastewater treatment system that contains according to claim 1, is characterized in that, multifeed clarifier is level Four settling tank.
3. the formaldehyde industrial wastewater treatment system that contains 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.
4. according to claim 1 containing formaldehyde industrial wastewater treatment system, it is characterized in that, also comprise the transport pipe that connects last step settling tank and formaldehyde mixing tank, concentration is that formaldehyde and the last step settling tank supernatant liquor out of 40-70% massfraction first carried out pre-mixing by transport pipe before entering formaldehyde mixing tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863274.4U CN203922884U (en) | 2013-12-25 | 2013-12-25 | Containing formaldehyde industrial wastewater treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863274.4U CN203922884U (en) | 2013-12-25 | 2013-12-25 | Containing formaldehyde industrial wastewater treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203922884U true CN203922884U (en) | 2014-11-05 |
Family
ID=51818740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320863274.4U Expired - Lifetime CN203922884U (en) | 2013-12-25 | 2013-12-25 | Containing formaldehyde industrial wastewater treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203922884U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105645654A (en) * | 2016-01-12 | 2016-06-08 | 浙江新华新材料科技有限责任公司 | Methoxylated amino resin formaldehyde wastewater recovery method and device |
-
2013
- 2013-12-25 CN CN201320863274.4U patent/CN203922884U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105645654A (en) * | 2016-01-12 | 2016-06-08 | 浙江新华新材料科技有限责任公司 | Methoxylated amino resin formaldehyde wastewater recovery method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101906196B (en) | Comprehensive utilization method of phenolic resin wastewater | |
| CN108996865B (en) | Pretreatment method and device for biogas production from sludge | |
| CN111847744B (en) | System and method for treating high-salt organic wastewater in ion exchange resin production | |
| CN110817926A (en) | Method for directly preparing α -hemihydrate gypsum from titanium white waste acid | |
| CN106348267B (en) | A kind of method and device of Nitrogen-and Phosphorus-containing waste water production Diammonium phosphate (DAP) | |
| CN103724286A (en) | Method and system for coproducing tetrahydroxymethyl melamine and hexamethylol melamine | |
| CN203922884U (en) | Containing formaldehyde industrial wastewater treatment system | |
| CN101698132A (en) | Method for recycling tail gas generated by granulation of compound fertilizer | |
| CN204022585U (en) | Hexamethylolmelamine Waste Water Treatment | |
| CN103723860B (en) | Hexamethylolmelamine method of wastewater treatment and treatment system thereof | |
| CN102423695B (en) | Straw cellulose-polyhydroxyaluminium salt phosphorus removal adsorbent capable of completely being degraded, and manufacturing method thereof | |
| CN105461136A (en) | System and method for comprehensive treatment of wastewater of thermal power plant and recovery of chemical resources | |
| CN100567446C (en) | The preparation method of drilling diluter of TARA sulfonated tannin | |
| CN101665278A (en) | Compound phosphorus removal flocculating agent for water treatment | |
| CN104211106B (en) | A kind of carbonated rare earth preparation method not producing ammonia nitrogen waste water | |
| CN106478905A (en) | A kind of preparation method of the o-cresol-formaldehyde resin of without sewage discharge | |
| CN107935151B (en) | Coal slime water treatment method | |
| CN103723854B (en) | Method for intensive recovery of phosphorus in phosphorus-rich wastewater through applying polyacrylamide | |
| CN106967192B (en) | A kind of technique of calcium carbide production PVC | |
| CN112661128B (en) | Method for efficiently removing arsenic in phosphoric acid by wet purification | |
| CN203923065U (en) | Tetra methylol trimeric cyanamide and hexamethylolmelamine co-generation system | |
| CN112062100A (en) | Nano calcium peroxide, preparation method and application | |
| CN205222915U (en) | Thermal power plant's waste water integrated treatment and chemical resources recovery system | |
| CN103951142A (en) | Treatment method and device for cyclohexanone ammoximation wastewater | |
| CN111533098B (en) | Efficient purification method for recovering phosphoric acid in phosphoric acid method activated carbon production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141105 |
|
| CX01 | Expiry of patent term |