CN215799005U - Salt-containing wastewater evaporation and reduction device - Google Patents
Salt-containing wastewater evaporation and reduction device Download PDFInfo
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- CN215799005U CN215799005U CN202122423759.9U CN202122423759U CN215799005U CN 215799005 U CN215799005 U CN 215799005U CN 202122423759 U CN202122423759 U CN 202122423759U CN 215799005 U CN215799005 U CN 215799005U
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Abstract
The utility model provides a device for evaporation decrement of saline wastewater, which comprises a separation tank, a heating tank, a condensing tank and a refrigerator, wherein a material conveying pipe is arranged at the bottom of the separation tank, the lower part of the separation tank is connected with a circulating pipe, the heating tank and a circulating pump are connected on the circulating pipe in series, a liquid outlet of the circulating pipe is positioned at the upper part of the separation tank and connected with a spraying pipe, a steam extraction pipe is arranged at the top of the separation tank, a gas-liquid separator is connected on the steam extraction pipe in series, a liquid outlet of the gas-liquid separator is connected with the separation tank, the tail end of the steam extraction pipe is connected with the condensing tank, the lower part of the condensing tank is connected with the condensing tank, the condensing tank is connected with a vacuum pump, a refrigerant pipeline at the high pressure end of the refrigerator is introduced into the heating tank, a refrigerant is condensed into liquid in the heating tank, the refrigerant pipeline is introduced into the condensing tank through an expansion valve, and low-pressure gaseous refrigerant in the condensing tank returns to the low-pressure air suction end of the refrigerator through the refrigerant pipeline. Can carry out the low temperature evaporation with waste water by the heat pump principle, then utilize the cold junction of heat pump with steam condensation, reduce the energy consumption, improve decrement speed, reduce treatment cost.
Description
Technical Field
The utility model relates to the technical field of refrigeration, in particular to a salt-containing wastewater evaporation decrement device.
Background
At present, wastewater generated by a plurality of industries has the characteristics of saline wastewater, for example, desulfurization wastewater generated by a wet desulfurization FGD device desulfurization system is commonly adopted in a thermal power plant; base solution generated by the processes of chemical industry synthesis and the like. The salt-containing wastewater can contain various salts, wherein heavy metal ions are not contained in the salt-containing wastewater, or some anions limited by national discharge standards cannot be directly discharged. The high-salinity wastewater refers to wastewater with the total salt content of more than 1 percent by mass. Belongs to worldwide wastewater which is difficult to treat. In the water treatment industry, the existing desalting process is not enumerated, but the high threshold of one-time investment of ton water treatment cost and equipment facilities is more than half of that of small and medium-sized enterprises. Concentration treatment is generally required for improving the economy of the end treatment process before final treatment of the salt-containing wastewater, and methods which can be used for concentration of the salt-containing wastewater include evaporation, forward osmosis, reverse osmosis, electrodialysis, nanofiltration and the like. The concentration method of the salt-containing wastewater is an important foundation for ensuring the economy of the whole treatment process.
Such as the most common multi-effect evaporation (MED) equipment, the one-time investment price is at least 50 ten thousand yuan/t.h, the operation cost is as high as 130 yuan/t, and the material is the stainless steel and is not the titanium alloy. The latest mechanical forced recompression (MVR) equipment is close to the construction cost of 100 ten thousand yuan/t.h, and does not comprise public facilities such as a steam pipeline, a liquid storage tank, a centrifugal machine, a transfer tank and the like. Although the cost of ton water in operation can be reduced to 50 yuan/t, the defects of high treatment cost, shortage of technical talents, high maintenance cost and the like of the concentrated solution exist. The preconditions for the large amount of waste heat utilization required by other multi-stage flash (MSF) processes have limited brine treatment in many small and medium-sized plants.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides the salt-containing wastewater evaporation decrement device which can evaporate wastewater at low temperature by using a heat pump principle and then condense steam by using the cold end of a heat pump, so that the energy consumption is reduced, the decrement rate is increased and the treatment cost is reduced.
In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a contain salt waste water evaporation decrement device, includes knockout drum, heating tank, condensing tank and refrigerator, and the knockout drum bottom is equipped with the conveying pipeline, and the knockout drum low level connects the circulating pipe, concatenates heating tank and circulating pump on the circulating pipe, and the liquid outlet of circulating pipe is located the high level of knockout drum, and the knockout drum top is equipped with the steam extraction pipe, has concatenated vapour and liquid separator on the exhaust pipe, and vapour and liquid separator's liquid outlet connects the knockout drum, and steam extraction pipe end-to-end connection condensing tank, condensing tank low level connection condensing tank, a vacuum pump are connected to the condensing tank, in the refrigerator high pressure end refrigerant pipeline lets in the heating tank, the refrigerant condenses into liquid in the heating tank, and in the refrigerant pipeline lets in the condensing tank through an expansion valve, the refrigerant evaporates the endothermically in the condensing tank, and low pressure gaseous refrigerant returns the low pressure end of refrigerator through the refrigerant pipeline in the condensing tank. The refrigerant pipeline in the condensation tank is of a calandria structure, the calandria is equivalent to an evaporator of the refrigerating system, and the refrigerant expands in the calandria in the condensation tank through the expansion valve to absorb heat so as to condense water vapor. The refrigerant pipeline in the heating tank is also of a calandria structure, and the heat of the compressed refrigerant is used for heating the wastewater.
Furthermore, a heat dissipater is arranged on a refrigerant pipeline at the high-pressure end of the refrigerating machine. The heat dissipater is used for dissipating redundant heat, so that overhigh temperature in the heating tank is avoided, and scaling of pipelines is avoided.
Furthermore, the heat dissipater adopts an S-shaped heat dissipation pipe fan airflow heat dissipation structure.
Furthermore, the conveying pipeline is provided with two branches which are respectively a feeding branch and a discharging branch, and a valve and a water pump are connected in series on the feeding branch and the discharging branch.
Furthermore, a circulating water auxiliary condenser is arranged on a refrigerant pipeline from the heating tank. The circulating water auxiliary condenser is utilized to further condense the refrigerant, and the refrigerating effect of the refrigerant in the next condensation tank is improved.
The utility model has the beneficial effects that: the waste water in the separation tank is heated by the hot end of the refrigerator, so that the evaporation of water vapor is accelerated, and the water vapor is condensed and recovered at the cold end of the refrigerator, so that the evaporation process of the waste brine is accelerated, the aim of reducing the amount of the waste brine is fulfilled, the evaporation and reduction process of the water vapor is accelerated, the waste brine treatment efficiency is improved, and the waste water treatment cost is saved; the refrigerating and heating ends of the refrigerating machine are reasonably utilized for condensation and heating, the utilization rate of energy is improved, and the energy consumption in the treatment process is effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of the present invention.
Shown in the figure: 1. the system comprises a waste water tank, 2, a separation tank, 3, a heating tank, 4, a condensing tank, 5, a refrigerator, 6, a conveying pipe, 7, a feeding branch, 8, a discharging branch, 9, a circulating pipe, 11, a circulating pump, 12, a heat dissipater, 13, a circulating water auxiliary condenser, 14, a gas-liquid separator, 15, a steam extraction pipe, 16, a condensing tank, 17 and a vacuum pump.
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.
As shown in fig. 1, the evaporation and decrement device for salt-containing wastewater comprises a separation tank 2, a heating tank 3, a condensing tank 4 and a refrigerator 5, wherein a feed delivery pipe 6 is arranged at the bottom of the separation tank 2, the feed delivery pipe 6 is provided with two branches which are respectively a feed branch 7 and a discharge branch 8, the feed branch 7 and the discharge branch 8 are both connected in series with a valve and a water pump, and the feed branch is connected with a wastewater tank 1. The separation tank 2 is connected with a circulating pipe 9 at a low position, the circulating pipe 9 is connected with a heating tank 3 and a circulating pump 11 in series, a liquid outlet of the circulating pipe 9 is positioned above the liquid level in the separation tank 2, the top of the separation tank 2 is provided with a steam extraction pipe 15, the steam extraction pipe 15 is connected with a gas-liquid separator 14 in series, a liquid outlet of the gas-liquid separator 14 is connected with the separation tank 2, the tail end of the steam extraction pipe 15 is connected with a condensing tank 4, the condensing tank 4 is connected with a condensing tank 16 at a low position, and the condensing tank 16 is connected with a vacuum pump 17. The refrigerant pipeline at the high-pressure end of the refrigerating machine 5 is introduced into the heating tank 3, the refrigerant pipeline in the heating tank 3 is of a calandria structure, the refrigerant is condensed into liquid in the heating tank 3, and meanwhile, heat is released to heat the brine waste. The refrigerant pipeline is introduced into the condensing tank 4 through an expansion valve, the refrigerant evaporates and absorbs heat in the condensing tank 4, the low-pressure gaseous refrigerant in the condensing tank 4 returns to the low-pressure air suction end of the refrigerator 5 through the refrigerant pipeline, the refrigerant pipeline in the condensing tank 4 is of a calandria structure, the calandria structure is equivalent to an evaporator of a refrigerating system, and the refrigerant expands and absorbs heat in the calandria in the condensing tank 4 through the expansion valve to condense water vapor.
A heat eliminator 12 is arranged on a refrigerant pipeline at the high-pressure end of the refrigerator 5. The heat dissipater 12 is used for dissipating redundant heat, the temperature of the water entering the heating tank 3 is 85 ℃, the temperature of the water outlet of the heating tank 3 is 68 ℃, the overhigh temperature in the heating tank 3 is avoided, and the scaling of pipelines is avoided. The heat dissipator 12 preferably adopts an S-shaped heat dissipation pipe fan airflow heat dissipation structure.
In order to further cool and condense the refrigerant and improve the refrigeration effect of the refrigerant in the condensing tank 4 in the next step, a circulating water auxiliary condenser 13 is arranged on a refrigerant pipeline from the heating tank 3. The circulating water in the circulating water auxiliary condenser 13 can be waste brine, and can also be condensed water in the condensate tank 16.
During operation, the high temperature high pressure refrigerant gas that refrigerator 5 came out is at first carried out the heat dissipation and is reduced the uniform temperature by 12 heat dissipators, then the refrigerant gets into heating tank 3 and heats the brine waste in the heating tank 3, circulation pump 11 extracts the waste water in the knockout drum 2 to heating tank 3 in, the waste water after the heating gets back to knockout drum 2 again from the shower, promote steam to volatilize through spraying, volatile steam gets into condensing tank 4 condensation after gas-liquid separator 14 removed the little liquid therein under vacuum pump 17's suction effect, rivers after the condensation go into the lime set 16 and retrieve. The feeding branch 7 at the bottom of the separation tank 2 can be filled with waste brine, and the discharging branch 8 can discharge the concentrated waste brine.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The utility model provides a contain salt waste water evaporation decrement device which characterized in that: including the knockout drum, add the hot pot, condensing tank and refrigerator, the knockout drum bottom is equipped with the conveying pipeline, the knockout drum low level connection circulating pipe, concatenate heating tank and circulating pump on the circulating pipe, the liquid outlet of circulating pipe is located the high level of knockout drum and is connected with the shower, the knockout drum top is equipped with the steam extraction pipe, has concatenated vapour and liquid separator on the exhaust pipe, vapour and liquid separator's liquid outlet connection knockout drum, steam extraction pipe end-to-end connection condensing tank, condensing tank low level connection condensate tank, a vacuum pump is connected to the condensate tank, in refrigerator high pressure end refrigerant pipeline lets in the heating tank, the refrigerant becomes liquid in the heating pipe jar condensation, in the refrigerant pipeline lets in the condensing tank through an expansion valve, the refrigerant evaporates the endothermically in the condensing tank, low pressure gaseous refrigerant returns the low pressure induction end of refrigerator through the refrigerant pipeline in the condensing tank.
2. The evaporation decrement device for saline wastewater according to claim 1, wherein: and a heat dissipater is arranged on a refrigerant pipeline at the high pressure end of the refrigerating machine.
3. The evaporation decrement device for saline wastewater as defined in claim 2, wherein: the heat dissipater adopts an S-shaped radiating pipe fan airflow radiating structure.
4. The evaporation decrement device for saline wastewater according to claim 1, wherein: the conveying pipeline is provided with two branches which are respectively a feeding branch and a discharging branch, and a valve and a water pump are connected in series on the feeding branch and the discharging branch.
5. The evaporation decrement device for saline wastewater according to claim 1, wherein: and a circulating water auxiliary condenser is arranged on a refrigerant pipeline from the heating tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122423759.9U CN215799005U (en) | 2021-10-08 | 2021-10-08 | Salt-containing wastewater evaporation and reduction device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122423759.9U CN215799005U (en) | 2021-10-08 | 2021-10-08 | Salt-containing wastewater evaporation and reduction device |
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| CN215799005U true CN215799005U (en) | 2022-02-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114653078A (en) * | 2022-05-25 | 2022-06-24 | 深圳市家家分类科技有限公司 | Liquid level control method and related controller and system |
| CN115140794A (en) * | 2022-07-07 | 2022-10-04 | 常州市鼎亨机电设备有限公司 | Low-temperature evaporation device with automatic scale removing function for wastewater treatment |
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2021
- 2021-10-08 CN CN202122423759.9U patent/CN215799005U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114653078A (en) * | 2022-05-25 | 2022-06-24 | 深圳市家家分类科技有限公司 | Liquid level control method and related controller and system |
| CN114653078B (en) * | 2022-05-25 | 2022-09-20 | 深圳市家家分类科技有限公司 | Liquid level control method and related controller and system |
| CN115140794A (en) * | 2022-07-07 | 2022-10-04 | 常州市鼎亨机电设备有限公司 | Low-temperature evaporation device with automatic scale removing function for wastewater treatment |
| CN115140794B (en) * | 2022-07-07 | 2023-09-19 | 常州市鼎亨机电设备有限公司 | Low-temperature evaporation device with automatic scale removal function for wastewater treatment |
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