CN111998720A - Low-grade energy utilization process - Google Patents
Low-grade energy utilization process Download PDFInfo
- Publication number
- CN111998720A CN111998720A CN202010785502.5A CN202010785502A CN111998720A CN 111998720 A CN111998720 A CN 111998720A CN 202010785502 A CN202010785502 A CN 202010785502A CN 111998720 A CN111998720 A CN 111998720A
- Authority
- CN
- China
- Prior art keywords
- water
- circulating water
- circulating
- low
- cooling tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F2025/005—Liquid collection; Liquid treatment; Liquid recirculation; Addition of make-up liquid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a low-grade energy utilization process which comprises a circulating water system and a demineralized water preparation system, wherein the circulating water system comprises a cooling tower, a steam turbine, a water purifier and a clean water tank, a circulating water inlet pipe and a circulating water return pipe are connected between the steam turbine and the cooling tower, and the circulating water return pipe is provided with a branch pipe connected with a water inlet pipeline of the water purifier. Because the circulating water backwater is treated by the water purifier and then enters the clean water tank, the temperature of the raw water is raised to 25-30 ℃, so that the reverse osmosis membrane system of the demineralized water preparation system can achieve the optimal operation working condition, and the water yield is optimal; the steam is not used for heating, so that the steam consumption is saved, and the risk of unstable equipment operation caused by steam addition is eliminated; in addition, the salt content of the circulating water is reduced, and the turbidity of the circulating water treated by the water purifier is also reduced, so that the water quality of the circulating water is improved; the make-up water is directly supplemented to the cooling tower, and the water consumption of the plant is reduced.
Description
Technical Field
The invention relates to a low-grade energy utilization process.
Background
The process of the demineralized water preparation system comprises the following steps: the method comprises the steps of a steam-water mixed heat exchanger, a multi-media filter, a disc filter, ultrafiltration, primary reverse osmosis, secondary reverse osmosis and EDI, wherein raw water is river water, the temperature of the river water in winter is lower than 10 ℃, and the optimal operation temperature of a reverse osmosis membrane system is about 25-30 ℃. After the existing steam-water mixed heat exchanger is put into the existing winter, steam is adopted to directly heat water, the water temperature fluctuation is large in operation, the steam pipeline is large in vibration, the operation is unstable, and the potential safety hazard to equipment is large.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art, thereby providing the low-grade energy utilization process which has a simple structure, saves the loss of low-pressure steam, reduces the power consumption, implements water use according to quality and reduces the comprehensive water consumption.
The technical problem of the invention is mainly solved by the following technical scheme:
a low-grade energy utilization process comprises a circulating water system and a demineralized water preparation system, wherein the circulating water system comprises a cooling tower, a steam turbine, a water purifier and a clean water tank, a circulating water inlet pipe and a circulating water return pipe are connected between the steam turbine and the cooling tower, one end of the water purifier is connected with a water inlet pipeline, the other end of the water purifier is connected with the clean water tank, the circulating water return pipe is provided with a branch pipe which is connected with the water inlet pipeline of the water purifier, the other end of the clean water tank is connected with the demineralized water preparation system, circulating water in the cooling tower enters the steam turbine through the circulating water inlet pipe, circulating water which is heated after the action of the steam turbine is divided into two parts through the circulating water return pipe and the branch pipe, one part of the circulating water returns to the cooling tower for cooling and recycling, the, the reverse osmosis membrane of the demineralized water preparation system reaches the optimal running state, the treated low-grade water is supplied to low-requirement equipment for secondary utilization, and the clear water is supplied to high-requirement equipment for temperature rise and secondary utilization.
Further, the demineralized water preparation system comprises a multi-media filter, a disc filter and a reverse osmosis membrane.
Further, the temperature of the circulating water is 30-35 ℃.
Furthermore, the water inlet pipeline of the water purifier is a raw water inlet pipeline, and the cooling tower is connected with a make-up water inlet pipe.
Further, the water purifier adopts flocculation treatment.
The low-grade energy utilization process has the beneficial effects that: the low-grade energy utilization process utilizes circulating water backwater to be treated by the water purifier and then enters the clean water tank, so that the temperature of raw water is raised to 25-30 ℃, and a reverse osmosis membrane system of the demineralized water preparation system can achieve the optimal operation working condition and the water yield is optimal; the steam is not used for heating, so that the steam consumption is saved, and the risk of unstable equipment operation caused by steam addition is eliminated; in addition, the salt content of the circulating water is reduced, and the turbidity of the circulating water treated by the water purifier is also reduced, so that the water quality of the circulating water is improved; in addition, the make-up water is directly supplemented to the cooling tower, so that the workload of the cooling tower is reduced, and the water consumption of the plant is 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, 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 the drawings without creative efforts.
FIG. 1 is a schematic block diagram of the low-grade energy utilization process of the invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
Referring to fig. 1, the invention adopts the following technical scheme: a low-grade energy utilization process comprises a circulating water system and a demineralized water preparation system, wherein the circulating water system comprises a cooling tower, a steam turbine, a water purifier and a clean water tank, a circulating water inlet pipe and a circulating water return pipe are connected between the steam turbine and the cooling tower, one end of the water purifier is connected with a water inlet pipeline, the other end of the water purifier is connected with the clean water tank, the circulating water return pipe is provided with a branch pipe which is connected with the water inlet pipeline of the water purifier, the other end of the clean water tank is connected with the demineralized water preparation system, circulating water in the cooling tower enters the steam turbine through the circulating water inlet pipe, circulating water which is heated after the action of the steam turbine is divided into two parts through the circulating water return pipe and the branch pipe, one part of the circulating water returns to the cooling tower for cooling and recycling, the, the reverse osmosis membrane of the demineralized water preparation system reaches the optimal running state, the treated low-grade water is supplied to low-requirement equipment for secondary utilization, and the clear water is supplied to high-requirement equipment for temperature rise and secondary utilization.
The demineralized water preparation system comprises a multi-media filter, a disc filter and a reverse osmosis membrane.
The temperature of the circulating water is 30-35 ℃.
The water inlet pipeline of the water purifier is a raw water inlet pipeline, and the cooling tower is connected with a make-up water inlet pipe.
The water purifier adopts flocculation treatment.
Circulating water in the cooling tower enters the steam turbine through the circulating water inlet pipe, the circulating water heated under the action of the steam turbine is divided into two parts through the circulating water return pipe and a branch pipe, one part of the circulating water returns to the cooling tower for cooling and recycling, the other part of the circulating water and raw water flowing into the water inlet pipe enter the clear water tank after being treated by the water purifier, water in the clear water tank is treated by the operation of the demineralized water preparation system, the treated concentrated water is low-grade water, the treated low-grade water is used for being provided for low-requirement equipment for secondary utilization, the clear water is provided for high-requirement equipment for heating and recycling, and the supplementing water directly enters the cooling tower through the supplementing water inlet pipe and is mixed with the circulating water return water.
The low-grade energy utilization process has the beneficial effects that: the low-grade energy utilization process utilizes circulating water backwater to be treated by the water purifier and then enters the clean water tank, so that the temperature of raw water is raised to 25-30 ℃, and a reverse osmosis membrane system of the demineralized water preparation system can achieve the optimal operation working condition and the water yield is optimal; the steam is not used for heating, so that the steam consumption is saved, and the risk of unstable equipment operation caused by steam addition is eliminated; in addition, the salt content of the circulating water is reduced, and the turbidity of the circulating water treated by the water purifier is also reduced, so that the water quality of the circulating water is improved; in addition, the make-up water is directly supplemented to the cooling tower, so that the workload of the cooling tower is reduced, and the water consumption of the plant is reduced.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (5)
1. A low-grade energy utilization process is characterized in that: including circulating water system and demineralized water preparation system, circulating water system includes cooling tower, steam turbine, water purifier and clean water basin, be connected with circulating water inlet tube and circulating water wet return between steam turbine and the cooling tower, water purifier one end is connected with the inlet channel, and the other end links to each other with the clean water basin, the circulating water wet return is provided with branch pipe all the way and links to each other with the inlet channel of water purifier, the clean water basin other end links to each other with demineralized water preparation system, and circulating water in the cooling tower gets into the steam turbine through the circulating water inlet tube, and the circulating water that heats up after the steam turbine effect is divided into two parts through circulating water wet return and branch pipe all the way, and partly gets back to the cooling tower cooling and recycles, and another part gets into the clean water basin after the water purifier is handled, and water in the clean water basin is handled by, the treated low-grade water is used for being supplied to low-requirement equipment for secondary utilization, and the clean water is supplied to high-requirement equipment for temperature rise and reutilization.
2. The low-grade energy utilization process according to claim 1, characterized in that: the demineralized water preparation system comprises a multi-media filter, a disc filter and a reverse osmosis membrane.
3. The low-grade energy utilization process according to claim 1, characterized in that: the temperature of the circulating water is 30-35 ℃.
4. The low-grade energy utilization process according to claim 1, characterized in that: the water inlet pipeline of the water purifier is a raw water inlet pipeline, and the cooling tower is connected with a make-up water inlet pipe.
5. The low-grade energy utilization process according to claim 1, characterized in that: the water purifier adopts flocculation treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010785502.5A CN111998720A (en) | 2020-08-06 | 2020-08-06 | Low-grade energy utilization process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010785502.5A CN111998720A (en) | 2020-08-06 | 2020-08-06 | Low-grade energy utilization process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111998720A true CN111998720A (en) | 2020-11-27 |
Family
ID=73463442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010785502.5A Pending CN111998720A (en) | 2020-08-06 | 2020-08-06 | Low-grade energy utilization process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111998720A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2946334A1 (en) * | 2009-06-04 | 2010-12-10 | Otv Sa | WATER TREATMENT PROCESS FOR ITS DESALINATION, INCLUDING TREATMENT OF CONCENTRATES |
| CN203564965U (en) * | 2013-09-17 | 2014-04-30 | 首钢总公司 | Recycling system for circulating cooling water return energy of cold mill |
| CN207262993U (en) * | 2017-09-01 | 2018-04-20 | 西安华江环保科技股份有限公司 | One kind power generation condenser circulating water waste heat recycling system |
| CN110282809A (en) * | 2019-07-30 | 2019-09-27 | 中国华能集团清洁能源技术研究院有限公司 | A kind of system and method for producing boiler demineralized water using recirculated water |
-
2020
- 2020-08-06 CN CN202010785502.5A patent/CN111998720A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2946334A1 (en) * | 2009-06-04 | 2010-12-10 | Otv Sa | WATER TREATMENT PROCESS FOR ITS DESALINATION, INCLUDING TREATMENT OF CONCENTRATES |
| CN203564965U (en) * | 2013-09-17 | 2014-04-30 | 首钢总公司 | Recycling system for circulating cooling water return energy of cold mill |
| CN207262993U (en) * | 2017-09-01 | 2018-04-20 | 西安华江环保科技股份有限公司 | One kind power generation condenser circulating water waste heat recycling system |
| CN110282809A (en) * | 2019-07-30 | 2019-09-27 | 中国华能集团清洁能源技术研究院有限公司 | A kind of system and method for producing boiler demineralized water using recirculated water |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203249231U (en) | System using water drainage waste heat of heating network heater to heat raw water | |
| CN101671086B (en) | Preheating technology of water processing system | |
| CN212642814U (en) | Backpressure reduction and waste heat utilization combined system of direct air cooling unit | |
| CN210419609U (en) | System for preparing boiler demineralized water by utilizing circulating water | |
| CN111998720A (en) | Low-grade energy utilization process | |
| CN215403623U (en) | Membrane concentrate processing system and leachate processing system capable of comprehensively utilizing waste heat | |
| CN204851350U (en) | Utilize living water heating system of power plant's exhaust steam waste heat | |
| CN202182458U (en) | Heat-supply-network water drainage system of supercritical direct air-cooling heat supply unit | |
| CN112081633B (en) | Device for realizing back pressure reduction and waste heat utilization of direct air cooling unit | |
| CN202420230U (en) | Waste heat recovery system for textile technology | |
| CN210118815U (en) | Sewage heat recovery heating device | |
| CN208980473U (en) | Boiler platoon water heats feed water by reverse osmosis device | |
| CN107327902B (en) | Heat supply network heater drainage energy recovery system and method suitable for fine treatment process | |
| CN210662808U (en) | Waste heat utilization device | |
| CN216203272U (en) | Device for heating reverse osmosis inlet water temperature by using continuous sewage discharge of boiler | |
| CN215559518U (en) | High-quality soft water making system | |
| CN202647719U (en) | Heating network drain treatment system for subcritical wet cooling heat supply unit | |
| CN219620943U (en) | Membrane method desalted water treatment device | |
| CN216431866U (en) | Back pressure unit steam power plant external supply steam condensate return water waste heat recovery system | |
| CN107140714B (en) | Equipment and process for improving reverse osmosis efficiency by using waste heat of heating return water | |
| CN205347449U (en) | Heat energy equipment of recycling | |
| CN205133267U (en) | Circulating water comprehensive use of resources system of steam power plant | |
| CN218442237U (en) | Boiler fixed-exhaust steam recovery device | |
| CN212657773U (en) | Online water quality treatment system for primary heat supply network water | |
| CN204359182U (en) | A kind of water circulation processing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201127 |