CN113237051A - Key equipment of efficient steam condensate recovery system - Google Patents

Key equipment of efficient steam condensate recovery system Download PDF

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Publication number
CN113237051A
CN113237051A CN202110285683.XA CN202110285683A CN113237051A CN 113237051 A CN113237051 A CN 113237051A CN 202110285683 A CN202110285683 A CN 202110285683A CN 113237051 A CN113237051 A CN 113237051A
Authority
CN
China
Prior art keywords
water
cavitation
flash chamber
recovery system
key equipment
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
Application number
CN202110285683.XA
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Chinese (zh)
Inventor
樊桦
吴东垠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Jiaotong University
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Xian Jiaotong University
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Filing date
Publication date
Application filed by Xian Jiaotong University filed Critical Xian Jiaotong University
Priority to CN202110285683.XA priority Critical patent/CN113237051A/en
Publication of CN113237051A publication Critical patent/CN113237051A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22DPREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D11/00Feed-water supply not provided for in other main groups
    • F22D11/02Arrangements of feed-water pumps
    • F22D11/06Arrangements of feed-water pumps for returning condensate to boiler
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/66Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00Component parts or details of steam boilers
    • F22B37/02Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/42Applications, arrangements, or dispositions of alarm or automatic safety devices
    • F22B37/44Applications, arrangements, or dispositions of alarm or automatic safety devices of safety valves
    • F22B37/446Safety devices responsive to overpressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00Component parts or details of steam boilers
    • F22B37/02Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/42Applications, arrangements, or dispositions of alarm or automatic safety devices
    • F22B37/46Applications, arrangements, or dispositions of alarm or automatic safety devices responsive to low or high water level, e.g. for checking, suppressing, extinguishing combustion in boilers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28BSTEAM OR VAPOUR CONDENSERS
    • F28B9/00Auxiliary systems, arrangements, or devices
    • F28B9/08Auxiliary systems, arrangements, or devices for collecting and removing condensate

Abstract

The invention discloses key equipment of a high-efficiency steam condensate recovery system, which comprises a steam chamber, a cavitation eliminator, a liquid level sensor, a high-temperature water pump, a motor, an injection pipe, a water return pipe, a blow-off pipe and a safety valve. A safety valve is arranged above the flash chamber, the left side and the right side of the top of the flash chamber are respectively connected with an injection pipe and a water return pipe, a cavitation eliminator is arranged at an outlet at the bottom of the flash chamber, and the outlet is connected with a high-temperature water pump driven by a motor; the method of closed recovery is adopted, so that the condensed water recovery runs under the high-temperature closed condition, and a unique steam-water separation and anti-cavitation device is adopted in the cavitation eliminator, thereby avoiding the situations of cavitation or no water discharge and the like of the pump body. The invention solves the problems of high system energy consumption, poor equipment reliability and the like caused by the fact that the existing equipment directly conveys the steam-water mixture or the condensed water back to the condensed water tank, and has the advantages of simple structure, safety, reliability, energy conservation, consumption reduction and the like.

Description

Key equipment of efficient steam condensate recovery system
Technical Field
The invention relates to key equipment of a high-efficiency steam condensate recovery system, in particular to the key equipment of a steam condensate recovery system of secondary steam generated when condensate flashes in a water tank in the production process of small industrial and civil boilers.
Background
Water is a good heat exchange carrier, and most of heat exchange equipment adopts water as a heat exchange medium. Generally, a boiler is adopted to heat water into saturated or superheated steam, the saturated or superheated steam is changed into steam-water mixture or condensed water after energy is released in heat utilization equipment to do work, a flash evaporation phenomenon occurs when the saturated or superheated steam enters a condensed water tank, generated secondary steam is directly discharged to the air, and therefore a large amount of waste of water is inevitably caused. With the development of national economy and the improvement of the living standard of people, the demand of energy sources is developed in advance, the consumption of water is greatly increased, as is well known, China is a water-deficient country on the whole, and water consumption in a plurality of cities and regions of China is below a warning line. Therefore, water and energy conservation is an important problem to be solved urgently, is an important key technical problem which needs to be solved urgently and cannot be solved well all the time in energy, chemical industry, metallurgy, light industry, life and other departments in China, and urgently needs to develop water-saving equipment with advanced performance.
The condensate water of the traditional heat exchange equipment is directly discharged to the air, the condensate water recovery mode not only causes a great deal of energy loss, but also the condensate water pump is easy to be subjected to cavitation or water discharge because the condensate water tank is open and oxygen enters in the operation process, so that the equipment of the system is seriously corroded.
The invention provides key equipment of a high-efficiency steam condensate recovery system, aiming at improving the recovery rate of condensate and the energy conversion efficiency of the equipment and ensuring simple structure and safe and reliable operation of the equipment when steam condensate of secondary steam generated when the condensate is subjected to flash evaporation in a water tank is involved in the production process of small industrial and civil boilers.
Disclosure of Invention
The invention mainly solves the technical problem of providing key equipment of a high-efficiency steam condensate recovery system, which can improve the recovery rate of condensate and the energy conversion efficiency of the equipment and ensure that the equipment has simple structure and safe and reliable operation.
In order to solve the technical problems, the invention adopts a technical scheme that:
a key device of a high-efficiency steam condensate recovery system comprises a flash chamber 1, a cavitation eliminator 2, a liquid level sensor 3, a high-temperature water pump 4, a motor 5, an injection pipe 6, a water return pipe 7, a blow-off pipe 8 and a safety valve 9; a safety valve 9 is arranged above the flash chamber 1, the left side and the right side of the top of the flash chamber 1 are respectively connected with an injection pipe 6 and a water return pipe 7, a cavitation eliminator 2 is arranged at an outlet at the bottom of the flash chamber 1, and the outlet is connected with a high-temperature water pump 4 driven by a motor 5.
The relief valve 9 determines the opening pressure from the system pressure conditions.
The inside of the cavitation eliminator 2 adopts a steam-water separation technology and a cavitation-preventing device.
A liquid level sensor 3 is arranged in the flash chamber 1, the liquid level is automatically adjusted, and the start, stop and double-pump switching of the high-temperature water pump 4 are controlled.
The drain pipe 8 is arranged at the side edge of the bottom of the flash chamber 1.
The flash evaporation chamber 1 adopts closed recovery, so that the recovery of the condensed water runs under the conditions of high temperature and sealing, the energy loss caused by the outward discharge of secondary flash evaporation steam of high-temperature water is effectively solved, and the recovery rate of the condensed water and the temperature of boiler feed water are improved.
The invention has the beneficial effects that:
the key equipment of the high-efficiency steam condensate recovery system adopts closed recovery, so that the condensate recovery runs under high-temperature and closed conditions, the energy loss caused by outward discharge of steam generated during secondary flash evaporation of high-temperature water is effectively solved, and the condensate recovery rate and the boiler feed water temperature are improved; the inside of the cavitation eliminator adopts a steam-water separation and cavitation-prevention device, so that the problems of cavitation or no water discharge and the like of a pump body in the conveying process of high-temperature water are overcome, and the severe corrosion damage of cavitation to equipment and pipelines is avoided; a liquid level sensor is arranged in the flash chamber, and a programmable controller is automatically controlled and selected through a full-automatic scheme design, so that the on-off control, the automatic alarm and the automatic switching of double pumps are automatically controlled, and the unattended operation is realized; the safety valve determines the opening pressure according to the pressure condition of the system, so that the safety of a process system under special conditions can be ensured; the whole equipment has simple structure, convenient installation and lower cost.
Drawings
FIG. 1 is a schematic diagram of the structure of the key equipment of an efficient steam condensate recovery system of the present invention;
Detailed Description
The invention is further described in detail below with reference to the drawings and the detailed description so that the advantages and features of the invention can be more easily understood by those skilled in the art, and the scope of the invention is more clearly and clearly defined.
The invention relates to key equipment of a high-efficiency steam condensate recovery system, which comprises a steam chamber 1, a cavitation eliminator 2, a liquid level sensor 3, a high-temperature water pump 4, a motor 5, an injection pipe 6, a water return pipe 7, a blow-off pipe 8 and a safety valve 9.
As a preferred embodiment of the present invention, as shown in fig. 1, a safety valve 9 is disposed above the flash chamber 1, the left and right sides of the top of the flash chamber 1 are respectively connected with an injection pipe 6 and a water return pipe 7, a cavitation eliminator 2 is disposed at the bottom outlet of the flash chamber 1, and the outlet is connected with a high-temperature water pump 4 driven by a motor 5.
After releasing energy to do work in the heat utilization equipment, the saturated or superheated steam is changed into steam-water mixture or condensed water and enters the flash evaporation chamber 1 through the water return pipe 7, and when the liquid level sensor 3 in the flash evaporation chamber 1 detects that the water level reaches a set value, a control starting signal is transmitted to the high-temperature water pump 4 to convey high-temperature water in the flash evaporation chamber 1 to the water utilization equipment. The sewage discharge pipe 8 effectively decontaminates high-temperature water, and the high-temperature water overcomes the problems that a pump body is subjected to cavitation or does not discharge water and the like in the conveying process through the cavitation eliminator 2, so that the severe corrosion damage of cavitation to equipment and pipelines is avoided.
The pressure in the flash chamber 1 is monitored through the safety valve 9, when the high-temperature water pressure in the flash chamber 1 exceeds the safety pressure, the safety valve 9 is opened, the high-temperature water and the flash steam in the flash chamber 1 are emptied, and the safety valve 9 is closed until the pressure in the flash chamber 1 reaches the safety pressure, so that the system safety is ensured.
In conclusion, the invention adopts a closed recovery mode to ensure that the condensed water recovery runs under the conditions of high temperature and sealing, effectively solves the energy loss caused by the outward discharge of steam generated during the secondary flash evaporation of high-temperature water, and improves the recovery rate of the condensed water and the temperature of boiler feed water; the inside of the cavitation eliminator adopts a steam-water separation and cavitation-prevention device, so that the problems of cavitation or no water discharge and the like of a pump body in the conveying process of high-temperature water are overcome, and the severe corrosion damage of cavitation to equipment and pipelines is avoided; a liquid level sensor is arranged in the flash chamber, and a programmable controller is automatically controlled and selected through a full-automatic scheme design, so that the on-off control, the automatic alarm and the automatic switching of double pumps are automatically controlled, and the unattended operation is realized; the safety valve determines the opening pressure according to the pressure condition of the system, so that the safety of a process system under special conditions can be ensured; the whole equipment has simple structure, convenient installation and lower cost.

Claims (6)

1. The utility model provides a key equipment of high-efficient steam condensate recovery system which characterized in that: comprises a flash chamber (1), a cavitation eliminator (2), a liquid level sensor (3), a high-temperature water pump (4), a motor (5), an injection pipe (6), a water return pipe (7), a blow-off pipe (8) and a safety valve (9); a safety valve (9) is arranged above the flash chamber (1), the left side and the right side of the top of the flash chamber (1) are respectively connected with an injection pipe (6) and a water return pipe (7), a cavitation eliminator (2) is arranged at an outlet at the bottom of the flash chamber (1), and the outlet is connected with a high-temperature water pump (4) driven by a motor (5).
2. The key equipment of an efficient steam condensate recovery system as claimed in claim 1, wherein: the safety valve (9) determines the opening pressure from the system pressure.
3. The key equipment of an efficient steam condensate recovery system as claimed in claim 1, wherein: the inside of the cavitation eliminator (2) adopts a steam-water separation technology and a cavitation-preventing device.
4. The key equipment of an efficient steam condensate recovery system as claimed in claim 1, wherein: a liquid level sensor (3) is arranged in the flash chamber (1), the liquid level is automatically adjusted, and the start and stop of the high-temperature water pump (4) and the double-pump switching are controlled.
5. The key equipment of an efficient steam condensate recovery system as claimed in claim 1, wherein: the drain pipe (8) is arranged on the side edge of the bottom of the flash evaporation chamber (1).
6. The key equipment of an efficient steam condensate recovery system as claimed in claim 1, wherein: the flash chamber (1) adopts closed recovery.
CN202110285683.XA 2021-03-17 2021-03-17 Key equipment of efficient steam condensate recovery system Pending CN113237051A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110285683.XA CN113237051A (en) 2021-03-17 2021-03-17 Key equipment of efficient steam condensate recovery system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110285683.XA CN113237051A (en) 2021-03-17 2021-03-17 Key equipment of efficient steam condensate recovery system

Publications (1)

Publication Number Publication Date
CN113237051A true CN113237051A (en) 2021-08-10

Family

ID=77130319

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110285683.XA Pending CN113237051A (en) 2021-03-17 2021-03-17 Key equipment of efficient steam condensate recovery system

Country Status (1)

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CN (1) CN113237051A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115435313A (en) * 2022-10-24 2022-12-06 厦门烟草工业有限责任公司 Steam condensate recovery system and control method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202470030U (en) * 2012-01-19 2012-10-03 北京德海通科技有限公司 Closed high-temperature condensed water recycling device
CN105782950A (en) * 2014-12-26 2016-07-20 黑龙江宏宇电站设备有限公司 Closed type high-temperature condensed water recoverer device and recovery method thereof
CN207298905U (en) * 2017-09-04 2018-05-01 河南同恒节能科技有限公司 High-temp. condensate closed recovery gear
CN212511102U (en) * 2020-06-13 2021-02-09 遂成药业股份有限公司 High-temperature condensation waste water recycling device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202470030U (en) * 2012-01-19 2012-10-03 北京德海通科技有限公司 Closed high-temperature condensed water recycling device
CN105782950A (en) * 2014-12-26 2016-07-20 黑龙江宏宇电站设备有限公司 Closed type high-temperature condensed water recoverer device and recovery method thereof
CN207298905U (en) * 2017-09-04 2018-05-01 河南同恒节能科技有限公司 High-temp. condensate closed recovery gear
CN212511102U (en) * 2020-06-13 2021-02-09 遂成药业股份有限公司 High-temperature condensation waste water recycling device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115435313A (en) * 2022-10-24 2022-12-06 厦门烟草工业有限责任公司 Steam condensate recovery system and control method thereof

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Application publication date: 20210810