CN107140714B - Equipment and process for improving reverse osmosis efficiency by using waste heat of heating return water - Google Patents
Equipment and process for improving reverse osmosis efficiency by using waste heat of heating return water Download PDFInfo
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- CN107140714B CN107140714B CN201710482591.4A CN201710482591A CN107140714B CN 107140714 B CN107140714 B CN 107140714B CN 201710482591 A CN201710482591 A CN 201710482591A CN 107140714 B CN107140714 B CN 107140714B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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Abstract
The invention discloses equipment and a process for improving reverse osmosis efficiency by using waste heat of heating backwater, wherein a heat exchanger is arranged at a water inlet of a reverse osmosis system, a heating backwater inlet, a high-temperature hot water inlet, a low-temperature hot water outlet, a cold water inlet and a cold water outlet are arranged on the heat exchanger, the heating backwater inlet is connected with a backwater pipe of the heating system, the high-temperature hot water inlet is connected with a drain tank, the cold water inlet is connected with an ultrafiltration water tank, the cold water outlet is connected with the water inlet of the reverse osmosis system, the low-temperature hot water outlet is connected with a circulating cooling water pipe of a condenser, an exhaust pipe of a steam turbine is communicated to the condenser, the low-temperature hot water exchanges heat. According to the invention, after the waste heat of heating return water and the waste heat of boiler drainage water are recycled, the return water temperature is effectively reduced, the vacuum of the condenser is improved, the heat loss and the power generation coal loss are reduced, and the output of the steam turbine is improved.
Description
Technical Field
The invention relates to equipment and a process for improving reverse osmosis efficiency by using waste heat of heating backwater.
Background
Because the water source is short, yellow river water is added during water production in order to save the cost of the water source, and the lower temperature of the yellow river water in winter directly influences the coagulation effect and accelerates the water quality of the outlet water of the filter, thereby influencing the water production efficiency and the water yield of reverse osmosis. The coagulating agent polyaluminium chloride has great influence on the water purifying effect due to water temperature, hydrolysis of inorganic salt coagulating agent is an endothermic reaction, hydrolysis is difficult when the water temperature is low, and hydrolysis speed is very slow when the water temperature is lower than 5 ℃, so that destabilization of colloidal particles is influenced. The water temperature is low, the viscosity is high, the resistance of colloidal particle motion is increased, and the particles are not easy to sink; the probability of collision among the glue particles is reduced when the water temperature is low, the coagulation effect is influenced, and the proper temperature is 15-20 ℃.
By adopting a circulating water waste heat heating technology, water returned from a heating heat user enters a steam turbine condenser to be used as circulating cooling water, but the vacuum of the condenser is lower due to high return water temperature. In order to solve the problem of water temperature, raw water is heated by directly feeding hydrophobic 30T/H into a clean water pool, the temperature is increased to be not lower than 20 ℃, and the water yield of 4 sets of reverse osmosis is increased by about 18-28T/H, which is not paid. The reverse osmosis inlet water is mixed water of yellow river water and underground well water, the water temperature is about 16 ℃, and if a method of directly connecting drainage into a clean water tank to heat raw water is adopted, the method is not economical. How to effectively integrate resources to achieve the best utilization state, and energy conservation and consumption reduction become the current urgent need. How to improve the vacuum of the condenser and the balance and effective utilization of the medium of the required heat body temperature on the basis of the heating of circulating water becomes the subject of research.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides equipment and a process for improving reverse osmosis efficiency by using heating backwater waste heat.
The technical scheme adopted by the invention is as follows:
the utility model provides an utilize heating return water waste heat to improve reverse osmosis efficiency's equipment is equipped with a heat exchanger at reverse osmosis system's water inlet, be equipped with heating return water entry, high temperature hot water entry, low temperature hot water export, cold water entry and cold water export on the heat exchanger, heating return water entry linkage heating system wet return, high temperature hot water entry linkage drain tank, cold water entry linkage ultrafiltration water tank, cold water exit linkage reverse osmosis system's water inlet, the recirculated cooling water pipe of low temperature hot water exit linkage condenser, the blast pipe of steam turbine lead to the condenser, low temperature hot water pass through the recirculated cooling water pipe of condenser, exchange heat with the steam turbine exhaust, heating system is connected to the delivery port of condenser.
Further, the heat exchanger is a double-shell pass and double-tube pass heat exchanger.
Furthermore, the condenser is formed by connecting two surface-made stainless steel pipes in two processes.
Furthermore, a middle water tank is arranged at a water outlet of the reverse osmosis system.
Furthermore, valves are respectively arranged on a pipeline connecting the heating backwater inlet and the heating system backwater pipe, a pipeline connecting the high-temperature hot water inlet and the drain tank, a pipeline connecting the low-temperature hot water outlet and the circulating cold water pipe of the condenser, a pipeline connecting the cold water inlet and the ultrafiltration water tank, and a pipeline connecting the cold water outlet and the reverse osmosis system.
A process for improving reverse osmosis efficiency by using waste heat of heating return water comprises the following steps:
heating water return water of a heating system enters a heat exchanger from a heating water return inlet for heat exchange; the mixed water of the yellow river water and the underground well water enters an ultrafiltration water tank, cold water in the ultrafiltration water tank enters a heat exchanger from a cold water inlet to exchange heat with heating backwater, the cold water enters a reverse osmosis system from a water inlet of the reverse osmosis system to carry out reverse osmosis when the temperature of the cold water is 25-30 ℃, low-temperature hot water discharged from a low-temperature hot water outlet enters a condenser, the low-temperature hot water enters a circulating cooling water pipe of the condenser from the water inlet of the condenser, exchanges heat with exhaust gas of a turbine, is discharged from an outlet of the condenser, and then enters a heating system to be reused.
Furthermore, the heating backwater temperature is 50-60 ℃, and the low-temperature hot water temperature is 30-40 ℃.
A process for improving reverse osmosis efficiency by using waste heat of heating return water comprises the following steps:
high-temperature hot water in the drain tank enters the heat exchanger from the high-temperature hot water inlet for heat exchange; the mixed water of the yellow river water and the underground well water enters an ultrafiltration water tank, cold water in the ultrafiltration water tank enters a heat exchanger from a cold water inlet to exchange heat with heating backwater, the cold water enters a reverse osmosis system from a water inlet of the reverse osmosis system to carry out reverse osmosis when the temperature of the cold water is 25-30 ℃, low-temperature hot water discharged from a low-temperature hot water outlet enters a condenser, the low-temperature hot water enters a circulating cooling water pipe of the condenser from the water inlet of the condenser, exchanges heat with exhaust gas of a turbine, is discharged from an outlet of the condenser, and then enters a heating system to be reused.
Further, the temperature of the high-temperature hot water is 70-80 ℃.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, after the heating backwater waste heat and the boiler drainage water waste heat are recycled, the backwater temperature is effectively reduced, the vacuum of the condenser is improved, the heat loss and the power generation coal loss are reduced, and the output of the steam turbine is improved; and the water inlet temperature of the reverse osmosis membrane is increased to about 25 ℃ from 18 ℃ of the original well water, the water yield of the reverse osmosis membrane is improved by 20 percent, and 17520 tons of water resources can be saved in a year.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a block diagram of a connection structure of a device for improving reverse osmosis efficiency by using waste heat of heating return water according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a process for improving reverse osmosis efficiency by using waste heat of heating return water according to a second embodiment of the present invention;
FIG. 3 is a flow chart of a process for improving reverse osmosis efficiency by using waste heat of heating return water according to a third embodiment of the invention;
the system comprises a heat exchanger 1, a heating system water return pipe 2, a drain tank 3, a drain tank 4, an ultrafiltration water tank 5, a reverse osmosis system 6, a condenser 7, a heating system 8, a valve 9, a heating water return inlet 10, a high-temperature hot water inlet 11, a cold water inlet 12, a cold water outlet 13, a low-temperature hot water outlet 14, an intermediate water tank 15 and a steam turbine.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example one
As shown in fig. 1, in the present embodiment, there is provided an apparatus for improving reverse osmosis efficiency by using heating return water waste heat, a heat exchanger 1 is arranged at a water inlet of a reverse osmosis system, the heat exchanger 1 is a double-shell-pass double-tube-pass heat exchanger, the heat exchanger 1 is provided with a heating return water inlet 9, a high-temperature hot water inlet 10, a low-temperature hot water outlet 13, a cold water inlet 11 and a cold water outlet 12, the heating return water inlet 9 is connected with a heating system return water pipe 2, a pipeline connecting the heating return water inlet and the heating system return water pipe is provided with a valve 8, the high-temperature hot water inlet 10 is connected with a drain tank 3, and a pipeline connecting the high-temperature hot; the cold water inlet 11 is connected with the ultrafiltration water tank 4, the cold water outlet 12 is connected with the water inlet of the reverse osmosis system 5, the water outlet of the reverse osmosis system 5 is provided with the middle water tank 14, and a pipeline connecting the cold water inlet and the ultrafiltration water tank and a pipeline connecting the cold water outlet and the reverse osmosis system are respectively provided with a valve 8; the recirculated cooling water pipe of low temperature hot water export 13 connection condenser 6, be equipped with valve 8 on the pipeline of the recirculated cooling water union coupling of low temperature hot water export and condenser, the blast pipe of steam turbine 15 leads to condenser 6, condenser 6 is formed by two way system surface formula stainless steel tube connections of two processes, and low temperature hot water passes through the recirculated cooling water pipe of condenser 6, exchanges the heat with the steam turbine exhaust, and the steam exhaust of steam turbine 15 condenses into water and collects in the hot-well on the recirculated cooling water pipe in the condenser, takes out by condensate pump, heating system 7 is connected to the delivery port of condenser 6.
According to the equipment for improving the reverse osmosis efficiency by using the heating backwater waste heat, the backwater temperature is reduced by recycling the heating backwater waste heat, the vacuum of the condenser is improved, the heat loss and the power generation coal loss are reduced, the output of the steam turbine is improved, the water inlet temperature of the reverse osmosis membrane is increased to about 25 ℃ from 18 ℃ of the original well water, the water yield of the reverse osmosis membrane is improved by 20%, and 17520 tons of water resources can be saved in the year.
Example two
As shown in fig. 2, the present embodiment provides a process for improving reverse osmosis efficiency by using waste heat of heating return water, including the following steps:
the diameter of the heat exchanger is 800mm, the length of the tube is 4500mm, and the area of the heat exchange surface is 185mm2The double shell pass and double tube pass heat exchanger. Heating water return water with the temperature of 52 ℃ of the heating system enters the heat exchanger from a heating water return inlet for heat exchange; the mixed water of the yellow river water and the underground well water enters an ultrafiltration water tank, cold water with the temperature of 16 ℃ in the ultrafiltration water tank enters a heat exchanger from a cold water inlet to exchange heat with heating return water, the cold water enters a reverse osmosis system from a water inlet of the reverse osmosis system to carry out reverse osmosis when the temperature of the cold water is 25 ℃, low-temperature hot water with the temperature of 35 ℃ from a low-temperature hot water outlet enters a condenser, the low-temperature hot water enters a circulating cooling water pipe of the condenser from the water inlet of the condenser, exchanges heat with exhaust gas of a turbine, is discharged from an outlet water of the condenser, and then enters a heating.
According to the process for improving the reverse osmosis efficiency by using the heating backwater waste heat, the backwater temperature is reduced, the vacuum of the condenser is improved, the heat loss and the power generation coal loss are reduced, the output of the steam turbine is improved, the water inlet temperature of the reverse osmosis membrane is increased to about 25 ℃ from 18 ℃ of the original well water, the water yield of the reverse osmosis membrane is improved by 20%, and 17520 tons of water resources can be saved in the year.
EXAMPLE III
As shown in fig. 3, the present embodiment provides a process for improving reverse osmosis efficiency by using waste heat of heating return water, including the following steps:
the diameter of the heat exchanger is 600mm, the length of the tube is 4500mm, and the area of the heat exchange surface is about 109mm2The double shell pass and double tube pass heat exchanger. High-temperature hot water at 80 ℃ in the drain tank enters the heat exchanger from a high-temperature hot water inlet for heat exchange; the mixed water of the yellow river water and the underground well water enters an ultrafiltration water tank, cold water with the temperature of 16 ℃ in the ultrafiltration water tank enters a heat exchanger from a cold water inlet to exchange heat with heating return water, the cold water enters a reverse osmosis system from a water inlet of the reverse osmosis system to carry out reverse osmosis when the temperature of the cold water is 25 ℃, low-temperature hot water with the temperature of 35 ℃ from a low-temperature hot water outlet enters a condenser, and the low-temperature hot water enters the condenser from a water inlet of the condenserAnd a circulating cooling water pipe of the condenser exchanges heat with exhaust gas of the steam turbine, and the exhaust water is discharged from an outlet of the condenser and then enters a heating system for reuse.
According to the process for improving the reverse osmosis efficiency by using the waste heat of the heating return water, the waste heat of the boiler drainage water is effectively recycled, the return water temperature is reduced, the vacuum of a condenser is improved, the heat loss and the power generation coal loss are reduced, the output of a steam turbine is improved, the water inlet temperature of a reverse osmosis membrane is increased to about 25 ℃ from 18 ℃ of the original well water, the water yield of reverse osmosis is improved by 20%, and water resources can be saved by 17520 tons every year.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (8)
1. An equipment for improving reverse osmosis efficiency by utilizing waste heat of heating return water is characterized in that a heat exchanger is arranged at a water inlet of a reverse osmosis system, the heat exchanger is provided with a heating backwater inlet, a high-temperature hot water inlet, a low-temperature hot water outlet, a cold water inlet and a cold water outlet, the heating backwater inlet is connected with a backwater pipe of a heating system, the high-temperature hot water inlet is connected with a drain tank, the cold water inlet is connected with the ultrafiltration water tank, the cold water outlet is connected with the water inlet of the reverse osmosis system, the low-temperature hot water outlet is connected with a circulating cooling water pipe of a condenser, an exhaust pipe of a turbine is communicated with the condenser, the low-temperature hot water passes through the circulating cooling water pipe of the condenser, the heat is exchanged with the exhaust gas of the steam turbine, the exhaust gas of the steam turbine is condensed into water on a circulating cooling water pipe in a condenser, the water is collected in a hot well and is pumped out by a condensate pump, and a water outlet of the condenser is connected with a heating system; and a water outlet of the reverse osmosis system is provided with an intermediate water tank.
2. The apparatus as claimed in claim 1, wherein the heat exchanger is a double shell pass double tube pass heat exchanger.
3. The apparatus as claimed in claim 1, wherein the condenser is formed by connecting two surface-made stainless steel tubes in two flow paths.
4. The apparatus of claim 1, wherein valves are respectively disposed on a pipeline connecting the heating backwater inlet and the heating system backwater pipe, a pipeline connecting the high-temperature hot water inlet and the drain tank, a pipeline connecting the low-temperature hot water outlet and the circulating cold water pipe of the condenser, a pipeline connecting the cold water inlet and the ultra-filtration water tank, and a pipeline connecting the cold water outlet and the reverse osmosis system.
5. The process of the equipment for improving the reverse osmosis efficiency by utilizing the waste heat of the heating backwater as claimed in claim 1, which is characterized by comprising the following steps:
heating water return water of a heating system enters a heat exchanger from a heating water return inlet for heat exchange; the mixed water of the yellow river water and the underground well water enters an ultrafiltration water tank, cold water in the ultrafiltration water tank enters a heat exchanger from a cold water inlet to exchange heat with heating backwater, the cold water enters a reverse osmosis system from a water inlet of the reverse osmosis system to carry out reverse osmosis when the temperature of the cold water is 25-30 ℃, low-temperature hot water discharged from a low-temperature hot water outlet enters a condenser, the low-temperature hot water enters a circulating cooling water pipe of the condenser from the water inlet of the condenser, exchanges heat with exhaust gas of a turbine, is discharged from an outlet of the condenser, and then enters a heating system to be reused.
6. The process of the equipment for improving the reverse osmosis efficiency by using the waste heat of the heating backwater as claimed in claim 5, wherein the temperature of the heating backwater is 50-60 ℃, and the temperature of the low-temperature hot water is 30-40 ℃.
7. The process of the equipment for improving the reverse osmosis efficiency by utilizing the waste heat of the heating backwater as claimed in claim 1, which is characterized by comprising the following steps:
high-temperature hot water in the drain tank enters the heat exchanger from the high-temperature hot water inlet for heat exchange; the mixed water of the yellow river water and the underground well water enters an ultrafiltration water tank, cold water in the ultrafiltration water tank enters a heat exchanger from a cold water inlet to exchange heat with high-temperature hot water in a drain tank, the cold water enters a reverse osmosis system from a water inlet of the reverse osmosis system to perform reverse osmosis when the temperature of the cold water is 25-30 ℃, low-temperature hot water discharged from a low-temperature hot water outlet enters a condenser, the low-temperature hot water enters a circulating cooling water pipe of the condenser from the water inlet of the condenser, exchanges heat with exhaust gas of a turbine, is discharged from an outlet water of the condenser, and then enters a heating system to be reused.
8. The process of the equipment for improving the reverse osmosis efficiency by using the waste heat of the heating return water as claimed in claim 7, wherein the temperature of the high-temperature hot water is 70-80 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710482591.4A CN107140714B (en) | 2017-06-22 | 2017-06-22 | Equipment and process for improving reverse osmosis efficiency by using waste heat of heating return water |
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| CN201710482591.4A CN107140714B (en) | 2017-06-22 | 2017-06-22 | Equipment and process for improving reverse osmosis efficiency by using waste heat of heating return water |
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| CN107140714B true CN107140714B (en) | 2020-05-12 |
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| CN101788142A (en) * | 2009-05-27 | 2010-07-28 | 王世英 | Steam condensate water recovery treatment and residual-heat utilizing system and method thereof |
| CN101787907A (en) * | 2010-01-29 | 2010-07-28 | 王世英 | Steam condensate water recycling and working system and method thereof |
| CN101844821A (en) * | 2010-05-28 | 2010-09-29 | 济南市琦泉热电有限责任公司 | Equipment and technology for improving reverse osmosis efficiency by waste heat recovery |
| CN204043022U (en) * | 2014-07-29 | 2014-12-24 | 石家庄安能科技有限公司 | A kind of low vacuum circulating water waste heat utilization |
| CN106224019A (en) * | 2016-08-24 | 2016-12-14 | 河北省电力勘测设计研究院 | Solar cogeneration method and device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6491822B2 (en) * | 1998-03-24 | 2002-12-10 | Mycelx Technologies Corporation | Protection of crossflow membranes from organic fouling |
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- 2017-06-22 CN CN201710482591.4A patent/CN107140714B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788142A (en) * | 2009-05-27 | 2010-07-28 | 王世英 | Steam condensate water recovery treatment and residual-heat utilizing system and method thereof |
| CN101787907A (en) * | 2010-01-29 | 2010-07-28 | 王世英 | Steam condensate water recycling and working system and method thereof |
| CN101844821A (en) * | 2010-05-28 | 2010-09-29 | 济南市琦泉热电有限责任公司 | Equipment and technology for improving reverse osmosis efficiency by waste heat recovery |
| CN204043022U (en) * | 2014-07-29 | 2014-12-24 | 石家庄安能科技有限公司 | A kind of low vacuum circulating water waste heat utilization |
| CN106224019A (en) * | 2016-08-24 | 2016-12-14 | 河北省电力勘测设计研究院 | Solar cogeneration method and device |
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