CN212102075U - Concentration and decrement device for high-salt and high-concentration organic wastewater - Google Patents
Concentration and decrement device for high-salt and high-concentration organic wastewater Download PDFInfo
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- CN212102075U CN212102075U CN202020307134.9U CN202020307134U CN212102075U CN 212102075 U CN212102075 U CN 212102075U CN 202020307134 U CN202020307134 U CN 202020307134U CN 212102075 U CN212102075 U CN 212102075U
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Abstract
The utility model discloses a concentrated decrement device of high salt high enriched organic waste water, the device includes former waste water tank, first delivery pump, heat exchanger, blender, pervaporation membrane module, second delivery pump, heater, condenser, vacuum pump, catch water, clean basin, concentrated waste water tank, clean basin. The utility model discloses the device carries out effectual separation dehydration through adopting pervaporation membrane separation technique and utilizing characteristics such as the selective permeability of membrane, at the concentrated decrement in-process make full use of used heat of high salt high concentration organic waste water, the energy consumption is low and can retrieve clean water and recycle, has both practiced thrift the energy, realizes the resourceization again, has higher application and promotion value. The utility model provides a technical problem such as loaded down with trivial details, the energy consumption height of technology existence of current concentration decrement.
Description
Technical Field
The utility model relates to a high salt high concentration organic waste water's concentrated decrement device belongs to environmental protection and resourceful technical field.
Background
With the rapid development of economy, the production process of industrial enterprises is gradually updated, various novel environmental protection problems are generated due to process changes, and a large amount of industrial byproducts including a large amount of wastewater and waste liquid containing high-salt and high-concentration organic matters are generated in the industrial production process, particularly in the industries of petrochemical industry, fine chemical industry and the like. With the increasing demand for environmental protection, the treatment process of these waste water and liquid is also more and more complicated. Meanwhile, enterprises generate a large amount of waste heat resources in production engineering, such as low-grade waste hot water, waste hot oil, high-temperature flue gas and the like, and if the waste heat resources are unreasonably utilized, not only is the environment polluted, but also the energy is seriously wasted.
At present, for the treatment of high-salt and high-concentration organic wastewater which is easy to treat, the treatment is carried out by adopting a physicochemical and biochemical mode, and then the wastewater reaches the standard and is discharged, and the mode has the disadvantages of complex process route, higher operating cost and incapability of well realizing resource utilization. And the high-salt high-concentration organic wastewater which cannot be treated is subjected to special independent outward transportation for incineration disposal, so that the unit price is higher, and the burden of enterprises is heavier if the wastewater yield is higher.
The pervaporation technology is a process for realizing separation by utilizing different dissolution (or surface adsorption) and diffusion rates of components in a membrane under the driving of steam pressure difference. Although the pervaporation and separation application technology is developed later, compared with the traditional concentration and separation processes such as rectification, adsorption and extraction, the pervaporation and separation application technology has the advantages of high separation efficiency, simple equipment, convenience in operation and low energy consumption, and is known as the most promising separation technology in the 21 st century as a novel concentration and separation technology.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough, aim at provides a high salt high concentration organic waste water's concentrated decrement device to solve the concentrated decrement technology loaded down with trivial details, the energy consumption height of prior art existence, resourceful low grade technical problem.
In order to achieve the aim, the utility model provides a concentration and decrement device for high-salt high-concentration organic wastewater, which comprises an original wastewater tank, a first delivery pump, a heat exchanger, a mixer, a pervaporation membrane component, a second delivery pump, a heater, a condenser, a vacuum pump, a steam-water separator, a clean water tank and a concentrated wastewater tank; the system comprises a raw wastewater tank, a heat exchanger cold fluid inlet, a heat exchanger cold fluid outlet, a heater, a mixer, a pervaporation membrane module, a condenser, a steam-water separator, a clean water tank, a vacuum pump, a first conveying pump, a second conveying pump, a condenser discharge port, a clean water tank, a vacuum pump, a heat exchanger cold fluid inlet, a heat exchanger cold fluid outlet, a heater outlet, a pervaporation membrane module, a condenser discharge port, a clean water tank and a vacuum pump. The liquid outlet of the pervaporation membrane module is connected with the liquid inlet of the concentrated wastewater tank.
In the device for concentrating and reducing the high-salt and high-concentration organic wastewater, the heat exchanger is a dividing wall type heat exchanger, the form of the heat exchanger can be a tubular type or plate type heat exchanger, and the material can be selected from metal or nonmetal materials according to the water quality characteristics. The hot fluid of the dividing wall type heat exchanger is introduced with low-grade waste heat, and low-grade waste heat resources are fully utilized.
In the device for concentrating and reducing the high-salt and high-concentration organic wastewater, the pervaporation membrane component is an organic composite membrane or an inorganic composite membrane, and adopts a hydrophilic osmotic membrane, and the main characteristics of the pervaporation membrane component comprise high temperature resistance, hydrophilicity and no hole.
In the device for concentrating and reducing the high-salt high-concentration organic wastewater, the pervaporation membrane module is in a tubular or plate-and-frame type.
In the above device for concentrating and reducing the high-salinity high-concentration organic wastewater, the heating form of the heater includes electric heating, electromagnetic heating, infrared heating, or the like.
In the device for concentrating and reducing the high-salt high-concentration organic wastewater, the condenser is a dividing wall type heat exchanger which can be a tubular or plate type heat exchanger, and the material can be selected from metal or nonmetal materials according to the water quality characteristics.
The utility model discloses the device can handle the concentrated decrement of high salt high concentration organic waste water, and its quality of water scope of high salt high concentration organic waste water is pH value between 2-12, and the temperature is less than or equal to 80 ℃, and SS is less than or equal to 20mg/L, and TDS is less than or equal to 300000mg/L, and CODcr is less than or equal to 100000 mg/L's all kinds of high salt high concentration organic waste water, does not contain the waste water that has high strong oxidizing property. If the SS in the original wastewater is high, the raw water needs to be pretreated, and the SS in the original wastewater is reduced to be within the water quality range.
The temperature of the inlet of the pervaporation membrane module is controlled to be between 50 ℃ and 80 ℃ according to different requirements of the quality of feed water, the concentration multiple of concentrated water and the quality of clean water, and is specifically controlled within +/-1 ℃ of the process set working temperature.
The recovery rate of the clean water after separation and recovery can reach 50-80% according to the water quality condition of raw water and different process parameter settings, the water quality pH of the clean water is 6-9, CODcr is less than or equal to 10mg/L, TDS is less than or equal to 100mg/L, the clean water is superior to the water quality standard of circulating water, the recycling requirement is met, the recycling of reclaimed water can be realized, and the recycling value is obtained. The concentrated wastewater discharged quantitatively after the decrement concentration can be obtained, and the concentrated wastewater meeting the concentration multiple requirement needs to be further safely treated.
The utility model has the advantages that:
1. the device adopts the pervaporation membrane separation technology and utilizes the characteristics of selective permeability and the like of the membrane to effectively separate and dewater aiming at high-salt and high-concentration organic wastewater, the process route is simple, low-grade waste heat resources are fully utilized, the operation energy consumption is effectively reduced, considerable economic benefits are generated, and the economic cost performance of the concentration and reduction device is improved;
2. through the utility model discloses a behind the osmotic separation, the clean water rate of recovery can reach 50% -80% according to the difference of raw water quality of water condition and technological parameter setting, clear water quality of water pH 6-9, CODcr is less than or equal to 10mg/L, TDS is less than or equal to 100mg/L, is superior to circulating water quality of water standard, and quality of water is comparatively clean, can be used to the production retrieval and utilization, produces the retrieval and utilization benefit, promotes the water resource utilization ratio of enterprise, has good feature of environmental protection and economic nature. The concentrated water can realize the concentration of the original wastewater by more than 1 time, and the volume of the finally obtained concentrated wastewater can reach 20-50 percent of the volume of the original wastewater according to the water quality condition of the original water and the different setting of process parameters. The concentration effect is good.
The utility model provides a pair of concentrated decrement device of high salt high concentration organic waste water is effectual with factory waste heat resource make full use of, is difficult to handle a large amount of high salt high concentration organic waste water of handling with the enterprise and effectively reduces, has both reduced the processing cost of the high salt high concentration waste water of enterprise, has practiced thrift resource and energy again, changes the evil into precious, provides comparatively practical device and method for the high salt high concentration organic waste water treatment and the resourceization that industrial and mining enterprises exist.
Drawings
Fig. 1 is a schematic structural diagram provided by the present invention.
In the figure: the system comprises an original wastewater tank 1, a first delivery pump 2, a heat exchanger 3, a mixer 4, a pervaporation membrane module 5, a second delivery pump 6, a heater 7, a condenser 8, a vacuum pump 9, a steam-water separator 10, a clean water tank 11 and a concentrated wastewater tank 12.
Detailed Description
As shown in fig. 1, the device for concentrating and reducing high-salt high-concentration organic wastewater comprises an original wastewater tank 1, a first delivery pump 2, a heat exchanger 3, a mixer 4, a pervaporation membrane module 5, a second delivery pump 6, a heater 7, a condenser 8, a vacuum pump 9, a steam-water separator 10, a clean water tank 11 and a concentrated wastewater tank 12; the waste water tank 1 is connected with a liquid inlet of a heat exchanger 3 through a first conveying pump 2, a liquid outlet of the heat exchanger 3 and a liquid outlet of a heater 7 are connected with a liquid inlet of a pervaporation membrane module 5 through a mixer 4, a liquid outlet of the pervaporation membrane module 5 is connected with a liquid inlet of the heater 7 through a second conveying pump 6, a gas outlet of the pervaporation membrane module 5 is connected with a feed inlet of a condenser 8, a discharge outlet of the condenser 8 is connected with a feed inlet of a steam-water separator 10, a discharge outlet of the steam-water separator 10 is connected with a liquid inlet of a clean water tank 11, and a gas. The liquid outlet of the pervaporation membrane module 5 is connected with the liquid inlet of the concentrated wastewater tank.
Preferably, the heat exchanger 3 is a dividing wall type heat exchanger, and can be a tubular or plate type heat exchanger, and the material can be selected from metal or nonmetal materials according to the water quality characteristics.
The pervaporation membrane component 5 can be an organic composite membrane or an inorganic composite membrane, adopts a selective permeable membrane, and has the main characteristics of high temperature resistance, hydrophilicity and no hole.
The pervaporation membrane module 5 is in the form of a tube or a plate frame.
The heater 7 is in the forms of electric heating, electromagnetic heating or infrared heating and the like.
The condenser 8 is a dividing wall type heat exchanger which can be a tube type or plate type heat exchanger, and the material can be selected from metal or nonmetal materials according to the water quality characteristics.
The devices are connected by pipe valves. All equipment and parts in direct contact with feed liquid, except the original wastewater tank, the clean water tank and the concentrated wastewater tank, including a delivery pump, pipelines, valves, membranes, membrane shells, a mixer, a heat exchanger, a condenser and a steam-water separator, are made of temperature-resistant and corrosion-resistant materials, such as UPVC (unplasticized polyvinyl chloride) materials.
The concentration and decrement operation method of the high-salt high-concentration organic wastewater of the concentration and decrement device comprises the following steps:
(1) carrying out heat exchange on the high-salt high-concentration organic wastewater and a low-grade waste heat source to reach a temperature range required by the process to obtain preheated wastewater; the low-grade waste heat source refers to waste steam generated in a factory.
(2) Uniformly mixing the preheated wastewater obtained in the step (1) and concentrated wastewater obtained by a heater 7 through a mixer 4, and introducing into a pervaporation membrane module 5 to serve as stable feed water; the feed water is separated into vaporized water in the pervaporation membrane module 5, the feed water is concentrated to obtain concentrated wastewater, the concentrated wastewater is conveyed to the heater 7 through the second conveying pump 6 to be heated, and the concentrated wastewater is mixed with the preheated wastewater after reaching the temperature required by the process to realize internal circulation. The pervaporation membrane module 5 quantitatively discharges the concentrated wastewater to a concentrated wastewater tank 12.
(3) Introducing the vaporized water separated in the step (2) into a condenser 8 to realize condensation, introducing the condensed water into a steam-water separator 10 to perform gas-water separation, pumping out the gas through a vacuum pump 9 and discharging, and collecting the liquid into a clean water tank 11 for recycling;
(4) collecting concentrated water: and (4) collecting the concentrated water discharged in the step (3) and then safely disposing.
Wherein the water quality range of the high-salt high-concentration organic wastewater is that the pH value is between 2 and 12, the water temperature is less than or equal to 80 ℃, the SS is less than or equal to 20mg/L, the TDS is less than or equal to 300000mg/L, and the CODc is less than or equal to 100000mg/L, and the wastewater does not contain wastewater with high oxidation property. If the SS in the original wastewater is high, the raw water needs to be pretreated, and the SS in the original wastewater is reduced to be within the water quality range.
The device carries out moisture vaporization separation of raw material water by adopting a vapor pressure difference driven pervaporation technology through concentration separation, thereby realizing the concentration of the feed water. The temperature range required by preheating the high-salt high-concentration organic wastewater is that the temperature of the preheated original wastewater is controlled within +/-5 ℃ lower than the working temperature required by the pervaporation process through heat exchange, so that the temperature of the mixed feed liquid can meet the requirements of the pervaporation process.
The heating control temperature of the feed water is controlled to be between 50 ℃ and 80 ℃ according to different requirements of the water quality of the feed water, the concentration multiple of concentrated water and the water quality of clean water, and the specific control temperature is within +/-1 ℃ of the process set working temperature.
The recovery rate of the clean water collected to the clean water tank 11 can reach 50-80% according to the water quality condition of raw water and different process parameter settings, the water quality of the clean water is 6-9, CODcr is less than or equal to 10mg/L, TDS is less than or equal to 100mg/L, the clean water is superior to the water quality standard of circulating water, the water quality is cleaner, and the clean water can be used for production and recycling to obtain recycling value.
The discharged concentrated water can realize the concentration of the original wastewater by more than 1 time, and the volume of the finally obtained concentrated wastewater can reach 20-50 percent of the volume of the original wastewater according to the water quality condition of the original water and the different setting of process parameters. The concentration effect is good. The concentrated wastewater after collection needs further safe disposal.
The working process of the present invention will be further explained with reference to the following embodiments:
example 1
Raw wastewater in a raw wastewater tank 1 is discharged from a production working section of a saccharin sodium production enterprise, the temperature is normal temperature, the pH value is 5.0, CODcr36200mg/L, TDS 125000mg/L, SS is less than 20mg/L, the temperature is raised to 53-58 ℃ after heat exchange is carried out on high-temperature waste gas in a factory through a heat exchanger 3 by a first conveying pump 2, the high-temperature waste gas is mixed with circulating water heated by a heater 7 and the water outlet temperature is 60 ℃ in a mixer 4, the mixed feed water enters a pervaporation membrane module 5 for concentration and separation, the pervaporation membrane module 5 carries out internal circulation reflux through a second conveying pump 6, the circulating water is heated by the heater 7 to keep the feed water temperature at 60 ℃, vaporized water separated by the pervaporation membrane module is condensed after heat exchange with circulating cooling water in the factory through a condenser 8, the operating pressure of a vacuum pump 9 is 100Pa, and the condensed water is separated by a steam-water separator 10, the permeable gasification membrane module 5 quantitatively discharges the concentrated wastewater to the concentrated wastewater tank 12 every 45 min. The pH value of the clear water is 6.5, CODcr is 8mg/L and TDS is 80mg/L, and the collected concentrated wastewater is reduced to be less than 50% of the volume of the original wastewater.
Example 2
The raw wastewater in the raw wastewater tank 1 is nanofiltration membrane concentrated water of an industrial enterprise, the raw wastewater is at normal temperature and has the pH value of 7.5 CODcr 2700mg/L, TDS25000mg/L, SS of less than 20mg/L, the temperature is raised to 55-58 ℃ after heat exchange with high-temperature wastewater of a factory area through a heat exchanger 3 by a first delivery pump 2, the raw wastewater is mixed with circulating water with the heating water outlet temperature of 60 ℃ by a heater 7 in a mixer 4, the mixed feed water enters a pervaporation membrane module 5 for concentration and separation, the pervaporation membrane module 5 carries out internal circulation reflux through a second delivery pump 6, the circulating water is heated by the heater 7 to keep the feed water temperature at 60 ℃, the vaporized water separated by the pervaporation membrane module is condensed after heat exchange with the circulating cooling water of the factory area through a condenser 8, the operating pressure of a vacuum pump 9 is 80Pa, and the condensed water is separated by a steam-water separator 10, the pervaporation membrane module 5 quantitatively discharges concentrated wastewater to the concentrated wastewater tank 12 every 50 min. The pH value of the clear water is 6.5, CODcr is 3mg/L and TDS is 20mg/L, and the collected concentrated wastewater is reduced to be less than 35% of the volume of the original wastewater.
Example 3
Raw wastewater in a raw wastewater tank 1 is workshop drainage of a resin product production enterprise, the raw wastewater is at normal temperature, the pH value is 4.0, CODcr5000mg/L, TDS 64000mg/L, SS is less than 20mg/L, the temperature is raised to 58-63 ℃ after heat exchange with plant low-grade steam is carried out by a heat exchanger 3 through a first delivery pump 2, the raw wastewater is mixed with circulating water heated by a heater 7 and the outlet water temperature is 65 ℃ in a mixer 4, the mixed feed water enters a pervaporation membrane module 5 for concentration and separation, the pervaporation membrane module 5 carries out internal circulation reflux through a second delivery pump 6, the circulating water is heated by the heater 7 to keep the feed water temperature at 65 ℃, the vaporized water separated by the pervaporation membrane module is condensed after heat exchange with plant circulating cooling water through a condenser 8, the operating pressure of a vacuum pump 9 is 80Pa, and the condensed water is separated by a steam-water separator 10 and is discharged to a clean water tank 11, the permeable gasification membrane module 5 quantitatively discharges the concentrated wastewater to the concentrated wastewater tank 12 every 45 min. The pH value of the clean water is 6.5, CODcr is 4.4mg/L and TDS is 30mg/L, and the collected concentrated wastewater is reduced to be less than 40% of the volume of the original wastewater.
Claims (6)
1. A concentration and decrement device for high-salt high-concentration organic wastewater is characterized by comprising an original wastewater tank (1), a first delivery pump (2), a heat exchanger (3), a mixer (4), a pervaporation membrane module (5), a second delivery pump (6), a heater (7), a condenser (8), a vacuum pump (9), a steam-water separator (10), a clean water tank (11) and a concentrated wastewater tank (12); the raw wastewater tank (1) is connected with a cold fluid inlet of a heat exchanger (3) through a first conveying pump (2), a cold fluid outlet of the heat exchanger (3) and a liquid outlet of a heater (7) are connected with a liquid inlet of an pervaporation membrane module (5) through a mixer (4), a liquid outlet of the pervaporation membrane module (5) is connected with a liquid inlet of the heater (7) through a second conveying pump (6), a gas outlet of the pervaporation membrane module (5) is connected with a feed inlet of a condenser (8), a discharge outlet of the condenser (8) is connected with a feed inlet of a steam-water separator (10), a discharge outlet of the steam-water separator (10) is connected with a liquid inlet of a clean water tank (11), and a gas outlet of the steam-water separator (10) is connected; the liquid outlet of the pervaporation membrane module (5) is connected with the liquid inlet of the concentrated wastewater tank.
2. The device for concentrating and reducing high-salinity high-concentration organic wastewater as claimed in claim 1, characterized in that the heat exchanger (3) is a dividing wall type heat exchanger.
3. The device for concentrating and reducing high-salt high-concentration organic wastewater according to claim 1, wherein the pervaporation membrane module (5) is in the form of a tube or a plate and frame.
4. The device for concentrating and reducing high-salt and high-concentration organic wastewater as claimed in claim 1, wherein the pervaporation membrane module (5) adopts a hydrophilic permeable membrane.
5. The device for concentrating and reducing high-salinity high-concentration organic wastewater according to claim 1, characterized in that the heating form of the heater (7) comprises electric heating, electromagnetic heating or infrared heating.
6. The device for concentrating and reducing high-salinity high-concentration organic wastewater as claimed in claim 1, wherein the condenser (8) is a dividing wall type heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020307134.9U CN212102075U (en) | 2020-03-12 | 2020-03-12 | Concentration and decrement device for high-salt and high-concentration organic wastewater |
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| CN202020307134.9U CN212102075U (en) | 2020-03-12 | 2020-03-12 | Concentration and decrement device for high-salt and high-concentration organic wastewater |
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Effective date of registration: 20220506 Address after: 311100 Room 302, 3 / F, 1380 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Patentee after: Shangyi blue film technology (Hangzhou) Co.,Ltd. Address before: 310030 room c408, No. 10, Xiyuan Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province Patentee before: SHANGYI ENVIRONMENTAL PROTECTION TECHNOLOGY (HANGZHOU) CO.,LTD. |
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