CN216273189U - anti-COD (chemical oxygen demand) pollution and anti-scaling efficient heat transfer evaporative crystallizer - Google Patents
anti-COD (chemical oxygen demand) pollution and anti-scaling efficient heat transfer evaporative crystallizer Download PDFInfo
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- CN216273189U CN216273189U CN202122732325.7U CN202122732325U CN216273189U CN 216273189 U CN216273189 U CN 216273189U CN 202122732325 U CN202122732325 U CN 202122732325U CN 216273189 U CN216273189 U CN 216273189U
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- 238000012546 transfer Methods 0.000 title claims abstract description 22
- 239000000126 substance Substances 0.000 title claims abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 6
- 239000001301 oxygen Substances 0.000 title claims abstract description 6
- 238000005498 polishing Methods 0.000 claims abstract description 17
- 239000000428 dust Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 abstract description 24
- 238000002425 crystallisation Methods 0.000 abstract description 13
- 230000008025 crystallization Effects 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 13
- 239000010865 sewage Substances 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000012141 concentrate Substances 0.000 abstract 1
- 239000008187 granular material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000007787 solid Chemical class 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of sewage treatment evaporative crystallization treatment, and particularly relates to an anti-COD (chemical oxygen demand) pollution and anti-scaling efficient heat transfer evaporative crystallizer. According to the utility model, the COD collection sleeve is arranged on the circulating pipeline, so that the device has excellent COD pollution resistance, the frequency of parking, cleaning and maintenance of the device is reduced by selecting the thin-wall internal polishing heat exchange pipe, the internal polishing evaporator and the internal polishing circulating pipeline, the long-period stable operation of the device is maintained, the crystallization salt is not easy to separate out and concentrate on the inner wall of the heat exchange pipe through the polishing treatment, the utilization rate of steam enthalpy is effectively improved, certain contribution is provided for energy conservation and emission reduction of a plant area, the material fluid obtains sufficient kinetic energy by arranging the circulating pump, and the material is maintained to have a certain flow speed in the evaporation crystallizer, the heater and the circulating pipeline.
Description
Technical Field
The utility model relates to the technical field of sewage treatment evaporative crystallization treatment, in particular to an anti-COD (chemical oxygen demand) pollution and scaling-resistant efficient heat-transfer evaporative crystallizer.
Background
Industrial sewage, especially industrial sewage in chemical industry, printing and dyeing industry and other industries, has the characteristics of complex components, high treatment difficulty and the like, and along with the rapid improvement of economic strength of China, people pay more and more attention to environmental protection and national requirements on green environmental protection development, and the wastewater is usually subjected to quality-based harmless treatment by a wastewater zero discharge technology. The quality of water of intaking of evaporative crystallization system generally is membrane concentration stage dense water among the zero release treatment technology, and this waste water salinity content is high, contain a quantitative COD, and the biodegradability is poor, adopts the chemical means to get rid of the COD and receives the salt influence, and the treatment effect is unsatisfactory, and along with going on of evaporative crystallization, COD in the waste water can be in the enrichment of evaporative crystallization device, influences the process of evaporative crystallization, influences the quality of comdenstion water, the composition of producing salt or solid salt is complicated, the processing degree of difficulty is big.
Meanwhile, in a mixed state of COD and solid salt, a composite scale layer which is difficult to clean can be formed, so that the heat transfer efficiency of the evaporative crystallization device is low, and even the evaporative crystallization device cannot stably run for a long time. The problem of treating high-COD and high-salinity wastewater is exposed in more and more evaporative crystallization devices, and the problem becomes a serious difficulty of wastewater zero discharge technology, and has attracted the attention of relevant practitioners and researchers. How to take out COD from the evaporative crystallization device without influencing the normal operation of the evaporative crystallization device is a technical key for solving the problem.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides an anti-COD (chemical oxygen demand) pollution and anti-scaling high-efficiency heat-transfer evaporative crystallizer, which solves the existing problems.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a resistant high-efficient heat transfer evaporative crystallizer of scale deposit of anti COD pollution, includes the heater, the heater both ends all are connected with the circulating line, heater one side is provided with the evaporimeter, evaporimeter one side is provided with the circulating pump, be provided with the COD surge drum on the circulating line.
As a preferable technical scheme of the utility model, the heater, the evaporator and the circulating pump are all connected through circulating pipelines.
As a preferred technical scheme of the utility model, the heater is a vertical shell-and-tube heat exchanger, the heat exchange tube in the heater is a thin-wall strong heat exchange tube, and the surface of the heat exchange tube in the heater is subjected to special polishing treatment.
As a preferable technical scheme of the utility model, the evaporator is a vertical evaporator, and the inner surface of the evaporator is subjected to special polishing treatment.
As a preferable technical scheme of the utility model, the inner surface of the circulating pipeline is subjected to special polishing treatment.
As a preferable technical scheme of the utility model, the circulating pump is an axial flow pump with low dust emission and large flow rate and with an upper inlet and a side outlet.
Compared with the prior art, the utility model provides an anti-COD pollution and anti-scaling high-efficiency heat-transfer evaporative crystallizer, which has the following beneficial effects:
1. according to the efficient heat transfer evaporative crystallizer with the COD pollution resistance and the scaling resistance, the COD collection sleeve is arranged on the circulating pipeline, the COD enriched in the evaporation concentration process is collected and discharged in time, the COD is prevented from being enriched in the system, the COD content can be controlled to be below 2000mg/L, the evaporation process is obviously improved, the quality of the condensate water is obviously improved, the salt production quality is obviously improved compared with the case that a COD removal device is not arranged, and the device has excellent COD pollution resistance;
2. according to the efficient heat transfer evaporative crystallizer with the COD pollution resistance and the scaling resistance, the thin-wall internal polishing heat exchange tube, the internal polishing evaporator and the internal polishing circulating pipeline are selected, so that a supersaturated salt solution is separated out on the surface of solid salt particles, the salt particles grow larger, and salt is prevented from being supersaturated and separated out on the inner wall of the heat exchanger pipeline, the inner wall of the evaporator and the inner wall of the circulating pipeline, so that the heat exchange tube is scaled; the frequency of parking, cleaning and maintenance of the device is reduced, and the long-period stable operation of the device is maintained;
3. according to the efficient heat transfer evaporative crystallizer with the COD pollution resistance and the scaling resistance, through polishing treatment, crystallized salt is not easy to separate out and enrich on the inner wall of the heat exchange tube, the wall of the heat exchange tube can be fully contacted with material liquid, the heat transfer process is enhanced, the heater can be maintained at a high heat transfer coefficient for a long time, and the heat transfer coefficient of the heater can be maintained at 1500W/m for years2The temperature is about one DEG C, the utilization rate of the heat content of the steam is effectively improved, and certain contribution is provided for energy conservation and emission reduction of a plant area;
4. this anti COD pollutes resistant scale deposit's high-efficient heat transfer evaporative crystallizer, through being provided with the circulating pump, the circulating pump chooses for use large-traffic, the suspension type axial-flow pump of low lift, make the material fluid obtain abundant kinetic energy, and maintain the material at evaporative crystallizer, the heater, certain velocity of flow has in the circulating line, heat exchange tube, evaporimeter and circulating line inner wall are washed away, avoid the suspended crystalline grain to adhere to and the inner wall surface, thereby influence heat exchange efficiency, the higher speed wash away and salt granule in the thick liquids form speed difference and concentration difference, be favorable to the growth of salt granule, form the great salt granule of grain size, and then promote the quality of producing salt.
Drawings
FIG. 1 is a schematic view of the process of the present invention.
In the figure: 1. a heater; 2. an evaporator; 3. a circulation pipe; 4. a circulation pump; 5. COD collecting vessel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in the present embodiment: the utility model provides a high-efficient heat transfer evaporative crystallizer of resistant scale deposit of anti COD pollution, includes heater 1, and 1 both ends of heater all are connected with circulating line 3, and 1 one side of heater is provided with evaporimeter 2, and 2 one sides of evaporimeter are provided with circulating pump 4, are provided with COD surge drum 5 on the circulating line 3.
In the embodiment, the heater 1, the evaporator 2 and the circulating pump 4 are connected through the circulating pipeline 3; the heater 1 is a vertical shell-and-tube heat exchanger, the heat exchange tube in the heater 1 is a thin-wall strong heat exchange tube, and the surface of the heat exchange tube in the heater 1 is subjected to special polishing treatment; the evaporator 2 is a vertical evaporator and the inner surface is subjected to special polishing treatment; the inner surface of the circulating pipeline 3 is subjected to special polishing treatment, so that supersaturated salt solution is separated out on the surface of solid salt particles, the salt particles grow, and the salt is prevented from being supersaturated and separated out on the inner wall of the pipeline of the heater 1, the inner wall of the evaporator 2 and the inner wall of the circulating pipeline 3, so that the heat exchange pipe is prevented from being fouled and scaled, the frequency of parking, cleaning and maintenance of the device is reduced, and the long-period stable operation of the device is maintained; circulating pump 4 is the low raise dust of enterprising side play, large-traffic axial-flow pump, make the material fluid obtain abundant kinetic energy, and maintain the material at evaporimeter 2, heater 1, certain velocity of flow has in circulating line 3, to the inside heat exchange tube of heater 1, evaporimeter 2 and 3 inner walls of circulating line wash away, avoid the crystalline grain of suspension to adhere to with the inner wall surface, thereby influence heat exchange efficiency, the higher speed wash away and salt granule in the thick liquids form speed difference and concentration difference, be favorable to the growth of salt granule, form the great salt granule of grain size, and then promote the quality of producing salt.
The working principle and the using process of the utility model are as follows: the material gets into circulating line 3 through the pipeline, is sent to heater 1 under the driving force of circulating pump 4 and is heated into the overheated state by the steam heat source, and the material under the overheated state can not vaporize under the effect of hydrostatic column, waits that the material circulation to in evaporimeter 2, and the hydrostatic column reduces, and the moisture vaporization in the material breaks away from the liquid surface and forms the secondary steam, and salt and COD in the material obtain the concentration, separate out the salt of crystallization that forms solid particle until salinity reaches the supersaturation state. The material is continuously concentrated through continuous heating and continuous circulation, and the content of the solid salt is maintained in a certain concentration range.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An efficient heat transfer evaporative crystallizer capable of resisting COD pollution and scaling is characterized in that: the device comprises a heater (1), wherein both ends of the heater (1) are connected with a circulating pipeline (3), an evaporator (2) is arranged on one side of the heater (1), a circulating pump (4) is arranged on one side of the evaporator (2), and a COD (chemical oxygen demand) collecting cylinder (5) is arranged on the circulating pipeline (3).
2. The efficient heat transfer evaporative crystallizer capable of resisting COD pollution and scaling as claimed in claim 1, is characterized in that: the heater (1), the evaporator (2) and the circulating pump (4) are all connected through a circulating pipeline (3).
3. The efficient heat transfer evaporative crystallizer capable of resisting COD pollution and scaling as claimed in claim 1, is characterized in that: the heater (1) is a vertical shell-and-tube heat exchanger, the heat exchange tube in the heater (1) is a thin-wall strong heat exchange tube, and the surface of the heat exchange tube in the heater (1) is subjected to special polishing treatment.
4. The efficient heat transfer evaporative crystallizer capable of resisting COD pollution and scaling as claimed in claim 1, is characterized in that: the evaporator (2) is a vertical evaporator, and the inner surface of the evaporator is subjected to special polishing treatment.
5. The efficient heat transfer evaporative crystallizer capable of resisting COD pollution and scaling as claimed in claim 1, is characterized in that: the inner surface of the circulating pipeline (3) is subjected to special polishing treatment.
6. The efficient heat transfer evaporative crystallizer capable of resisting COD pollution and scaling as claimed in claim 1, is characterized in that: the circulating pump (4) is an axial-flow pump with low dust and large flow rate and with an upper inlet and a side outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122732325.7U CN216273189U (en) | 2021-11-09 | 2021-11-09 | anti-COD (chemical oxygen demand) pollution and anti-scaling efficient heat transfer evaporative crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122732325.7U CN216273189U (en) | 2021-11-09 | 2021-11-09 | anti-COD (chemical oxygen demand) pollution and anti-scaling efficient heat transfer evaporative crystallizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216273189U true CN216273189U (en) | 2022-04-12 |
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ID=81008263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122732325.7U Active CN216273189U (en) | 2021-11-09 | 2021-11-09 | anti-COD (chemical oxygen demand) pollution and anti-scaling efficient heat transfer evaporative crystallizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216273189U (en) |
-
2021
- 2021-11-09 CN CN202122732325.7U patent/CN216273189U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A high efficiency heat transfer evaporation crystallizer resistant to cod pollution and scaling Effective date of registration: 20220713 Granted publication date: 20220412 Pledgee: Nanjing Branch of Jiangsu Bank Co.,Ltd. Pledgor: Nanjing Heyi Environment Group Co.,Ltd. Registration number: Y2022980010344 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231114 Granted publication date: 20220412 Pledgee: Nanjing Branch of Jiangsu Bank Co.,Ltd. Pledgor: Nanjing Heyi Environment Group Co.,Ltd. Registration number: Y2022980010344 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |