CN116557777A - Constant heat system of gas replacement steel cylinder and temperature control method - Google Patents

Constant heat system of gas replacement steel cylinder and temperature control method Download PDF

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Publication number
CN116557777A
CN116557777A CN202310433788.4A CN202310433788A CN116557777A CN 116557777 A CN116557777 A CN 116557777A CN 202310433788 A CN202310433788 A CN 202310433788A CN 116557777 A CN116557777 A CN 116557777A
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CN
China
Prior art keywords
steam
temperature
control valve
valve
pipe
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
CN202310433788.4A
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Chinese (zh)
Inventor
李智亚
刘殿涛
王冬瑞
李雄
李宝根
邱华
刘兴忠
游必超
姚玉传
后颖黎
蒋辉
殷富伦
杨帆
李永林
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.)
Huaneng Yunnan Diandong Energy Co Ltd
Original Assignee
Huaneng Yunnan Diandong Energy Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huaneng Yunnan Diandong Energy Co Ltd filed Critical Huaneng Yunnan Diandong Energy Co Ltd
Priority to CN202310433788.4A priority Critical patent/CN116557777A/en
Publication of CN116557777A publication Critical patent/CN116557777A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/02—Pipe-line systems for gases or vapours
    • F17D1/06—Pipe-line systems for gases or vapours for steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/10—Arrangements for preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/02—Pipe-line systems for gases or vapours
    • F17D1/065—Arrangements for producing propulsion of gases or vapours
    • F17D1/07—Arrangements for producing propulsion of gases or vapours by compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/14—Arrangements for supervising or controlling working operations for eliminating water
    • F17D3/145—Arrangements for supervising or controlling working operations for eliminating water in gas pipelines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0309—Heat exchange with the fluid by heating using another fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a constant heat system of a gas replacement steel cylinder and a temperature control method, wherein the constant heat system of the gas replacement steel cylinder comprises the following components: the steam control unit comprises a steam mother pipe, a pressure control valve and a temperature control valve which are arranged on the steam mother pipe, the heat exchange unit comprises a steel bottle heating box and a condenser, a plurality of gas steel bottles are arranged in the steel bottle heating box, the steam mother pipe is connected with the steel bottle heating box, the steel bottle heating box is connected with the condenser, the steam drain unit comprises a steam drain mother pipe, a plurality of first steam drain pipes, and a butterfly valve, a fan and a check valve which are arranged on the first steam drain pipes, and the condenser is connected with the steam drain mother pipe through the first steam drain pipes. The gas cylinder body is heated at constant temperature by taking hot steam as a heat source, so that the problems of manual whole participation and passive civilized production caused by manual pouring of the steel cylinder in the related technology are solved, and the potential safety hazard caused by an electric heating mode to a hydrogen system is effectively avoided.

Description

Constant heat system of gas replacement steel cylinder and temperature control method
Technical Field
The invention relates to the technical field of gas replacement, in particular to a constant heat system of a gas replacement steel cylinder and a temperature control method.
Background
The large-scale thermal power generating unit basically uses hydrogen as a cooling medium, the hydrogen is inflammable and explosive gas, and the gas in the generator needs to be replaced by an intermediate medium such as carbon dioxide and nitrogen before and after long-term shutdown or overhaul of the generator.
When the steel bottled gas is used as a preferable product in a large amount in various power generation enterprises, in the process of replacing the gas in the machine by using the steel bottle gas, the heat in the ambient air is required to be continuously absorbed in the process of releasing and converting the high-pressure liquid gas in the bottle into a gas state, so that the water vapor in the ambient air releases heat and is condensed into frost or even ice in the body of the steel bottle, the conversion efficiency and speed of the gas in the bottle from the liquid state to the gas state are seriously hindered, and the replacement work of the gas in the machine is even influenced.
In the related art, a large amount of cold water is used for pouring the steel cylinder or an electric heating blanket is laid on the surface of the steel cylinder to heat the steel cylinder, but the cold water is used for pouring the steel cylinder, so that the efficiency is low, manual whole participation is needed, a large amount of water flows to the ground to influence the civilized production of the surrounding environment, and the manner of laying the electric heating blanket can cause potential safety hazards to a generator hydrogen system.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the embodiment of the invention provides a constant heat system of a gas replacement steel cylinder, which uses hot steam as a heat source to heat the body of the gas steel cylinder and has the characteristics of safety, high efficiency and flexible treatment.
The embodiment of the invention also provides a temperature control method for the constant heat system of the gas replacement steel cylinder.
The constant heat system of the gas replacement steel cylinder comprises: the steam control unit comprises a steam main pipe and a pressure control valve and a temperature control valve which are sequentially arranged on the steam main pipe along the direction from the upstream to the downstream, the heat exchange unit comprises a steel bottle heating box and a condenser, a plurality of gas steel bottles are arranged in the steel bottle heating box, a first steam input end and a first steam output end are arranged on the steel bottle heating box, the output end of the steam main pipe is connected with the first steam input end, the condenser is provided with a second steam input end and a second steam output end, the first steam output end is connected with the second steam input end through a pipeline, a pressure probe of the pressure control valve is arranged on an air inlet pipeline of a gas displacement system, a temperature probe of the temperature control valve is arranged in the steel bottle heating box, the steam draining unit comprises a steam main pipe, a plurality of first steam exhaust pipes and a fan and a check valve which are sequentially arranged on the first steam exhaust pipe along the direction from the upstream to the downstream, and the first steam output end is connected with the first steam output end of the first steam exhaust pipe.
According to the constant heat system of the gas replacement steel cylinder, hot steam enters the heat exchange unit under the control of the steam control unit, and exhaust steam after heat exchange is discharged out of the system through the drainage steam discharge unit. The constant-temperature heating device has the advantages that the body of the gas steel cylinder is heated at a constant temperature by taking hot steam as a heat source, the problems that the efficiency of pouring the steel cylinder by using cold water is low and the civilized production is influenced in the related art are solved, and the problems of electric shock risks and potential safety hazards existing in the prior art that an electric heating blanket is laid on the surface of the steel cylinder or the steel cylinder is put into an electric heating box (a plurality of electric heating rods are arranged in the box to heat the air in the box to indirectly heat the body of the steel cylinder) are also effectively avoided.
In some embodiments, the steam control unit further comprises a pressure reducing valve disposed on the steam header upstream of the pressure control valve and a throttling device disposed within the steam header downstream of the temperature control valve.
In some embodiments, the steam control unit further comprises a shut-off valve and a gate valve, both of which are provided on the steam header, the shut-off valve being located upstream of the pressure reducing valve, the gate valve being located downstream of the thermo valve and upstream of the throttling device.
In some embodiments, the steam control unit further comprises a steam sub-pipe and a first normally closed gate valve arranged on the steam sub-pipe, wherein an input end of the steam sub-pipe is connected with the steam main pipe between the pressure reducing valve and the pressure control valve, and an output end of the steam sub-pipe is connected with the steam main pipe between the gate valve and the throttling device.
In some embodiments, the steam drain and exhaust unit further comprises a straight exhaust pipe and a normally closed stop valve arranged on the straight exhaust pipe, wherein an input end of the straight exhaust pipe is connected with the steam main pipe between the pressure reducing valve and an input end of the steam sub-pipe, and an output end of the straight exhaust pipe is provided with a first funnel.
In some embodiments, the steel cylinder heating box is further provided with a first water drain end, the condenser is further provided with a second water drain end, the water drain and steam exhaust unit further comprises a first U-shaped water seal and a second funnel which are connected, and the first water drain end and the second water drain end are connected with the first U-shaped water seal through a pipeline.
In some embodiments, the hydrophobic steam exhaust unit further comprises a second U-shaped water seal and a third funnel which are connected, and the steam exhaust main pipe is connected with the second U-shaped water seal.
In some embodiments, the steam drain and exhaust unit further comprises a second steam exhaust pipe and a second normally closed gate valve arranged on the second steam exhaust pipe, wherein the input end of the second steam exhaust pipe is connected with the second steam output end, and the output end of the second steam exhaust pipe is connected with the steam exhaust main pipe.
The temperature control method of the embodiment of the invention is used for the constant heat system of the gas replacement steel cylinder in any embodiment, and comprises the following steps:
when the temperature T measured by the temperature measuring probe of the temperature control valve is higher than the temperature set value T 0 Reducing the opening of the temperature control valve;
when the temperature T measured by the temperature measuring probe of the temperature control valve is lower than the temperature set value T 0 When the opening degree of the temperature control valve is increased, the temperature in the steel cylinder heating box is maintained at a temperature set value T 0 Between them;
when the temperature T measured by the temperature measuring probe of the temperature control valve reaches T 1 Closing the temperature control valve when the temperature control valve is closed;
when the pressure probe of the pressure control valve detects that the pressure of the air inlet pipeline of the gas replacement system reaches or is lower than the minimum allowable pressure P of the gas steel cylinder, or the temperature detected by the temperature detecting probe of the temperature control valve reachesTo T 1 And closing the pressure control valve when the temperature is not reduced after 10 s;
wherein the temperature is set to T 0 The parameter range of (C) is 35-40 ℃, T 1 At 40 ℃, the minimum allowable pressure P of the gas steel cylinder is 0.1MPa.
In some embodiments, the fan is shut down after a delay of 20 seconds when the temperature control valve and the pressure control valve are closed simultaneously.
Drawings
FIG. 1 is a schematic diagram of a constant heat system for a gas displacement cylinder in accordance with an embodiment of the present invention.
Fig. 2 is a logic diagram of a temperature control method according to an embodiment of the present invention.
Reference numerals:
a steam main pipe 11, a pressure control valve 111, a temperature control valve 112, a pressure reducing valve 113, a throttling device 114, a stop valve 115, a gate valve 116, a steam sub pipe 12, a first normally closed gate valve 121,
A steel cylinder heating box 21, a condenser 22,
The main exhaust pipe 31, the first exhaust pipe 32, the butterfly valve 321, the fan 322, the check valve 323, the straight exhaust pipe 33, the normally closed stop valve 331, the first funnel 34, the first U-shaped water seal 35, the second funnel 36, the second U-shaped water seal 37, the third funnel 38, the second exhaust pipe 39 and the second normally closed gate valve 391.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The following describes a constant heat system for a gas displacement cylinder according to an embodiment of the present invention with reference to the accompanying drawings.
As shown in fig. 1, a constant heat system for a gas exchange steel cylinder according to an embodiment of the present invention includes: a steam control unit, a heat exchange unit and a drain steam exhaust unit.
It is to be understood that the upstream and downstream are defined in terms of the flow direction of the hot steam. The steam control unit comprises a steam main pipe 11, and a pressure control valve 111 and a temperature control valve 112 which are sequentially arranged on the steam main pipe 11 along the upstream-downstream direction, hot steam is used as a heat source of the gas replacement steel cylinder constant heat system in the embodiment of the invention, for example, the heat source can come from an auxiliary steam system of a thermal power plant or a steam extraction system of a low-pressure area of a steam turbine, and the hot steam enters the steam main pipe 11 from the input end of the steam main pipe 11.
The heat exchange unit includes a cylinder heating tank 21 and a condenser 22, and a plurality of gas cylinders are provided in the cylinder heating tank 21. The cylinder heating box 21 is provided with a first steam input end and a first steam output end, the output end of the steam main pipe 11 is connected with the first steam input end, the condenser 22 is provided with a second steam input end and a second steam output end, and the first steam output end is connected with the second steam input end through a pipeline.
It is understood that the gas cylinders are used in connection with gas displacement systems such as those provided in the hydrogen-cooled generator set gas displacement operations of the thermal power generation industry. In the process of replacing the gas in the hydrogen-cooled generator set by using the gas (carbon dioxide or nitrogen) in the gas steel bottle, the required heat is provided by hot steam of the steam control unit.
The hot steam passes through the steam main pipe 11 and enters the steel cylinder heating box 21 through the first steam input end, so that the body of the gas steel cylinder in the steel cylinder heating box 21 is heated, the gas steel cylinder is in a constant-heat state, and the condition that the body frosts and freezes is avoided to influence the conversion efficiency and speed of the gas in the cylinder from liquid state to gas state.
Further, a pressure probe of the pressure control valve 111 is disposed on the gas inlet pipe of the gas substitution system, for detecting the pressure of the gas inlet pipe of the gas substitution system (i.e. the pressure of the residual gas in the gas cylinder). The pressure control valve 111 automatically opens when the gas pressure in the gas inlet line of the gas displacement system is above the minimum pressure required for the gas cylinder. The pressure control valve 111 automatically closes when the gas pressure in the gas inlet line of the gas displacement system is below the minimum pressure required for the gas cylinder.
The temperature probe of the temperature control valve 112 is disposed in the cylinder heating box 21, and is used for detecting the temperature of the steam in the cylinder heating box 21 (i.e. the ambient temperature in the cylinder heating box 21). The thermostatic valve 112 opens automatically when the temperature in the cylinder heating chamber 21 is below the maximum allowable temperature of the gas cylinder. When the temperature in the cylinder heating box 21 reaches the maximum allowable temperature of the gas cylinder, the temperature control valve 112 is automatically closed or completely closed, so that the temperature in the cylinder heating box 21 is kept to be basically constant, and the heat absorption requirement for releasing the high-pressure liquid gas of the gas cylinder is further met.
The automatic start-stop function of the pressure control valve 111 and the temperature control valve 112 can be realized by being connected to a factory DCS control system or being connected to a programmable PLC controller independently.
The steam after heat exchange in the steel bottle heating box 21 flows out of the steel bottle heating box 21 through the first steam output end, then enters the condenser 22 through the pipeline and through the second steam input end, the condenser 22 is connected into a factory cooling water system, and the steam containing waste heat is continuously condensed into liquid water under the action of circulating cooling water.
The drain steam exhaust unit includes a steam exhaust main pipe 31, a plurality of first steam exhaust pipes 32, and a butterfly valve 321, a fan 322 and a check valve 323 sequentially provided on the first steam exhaust pipes 32 in an upstream-to-downstream direction. The input end of the first steam discharging pipe 32 is connected with the second steam output end, and the output end of the first steam discharging pipe 32 is connected with the steam discharging main pipe 31.
Alternatively, as shown in fig. 1, two first steam exhaust pipes 32 are provided, and the two first steam exhaust pipes 32 are arranged in parallel, and each first steam exhaust pipe 32 is provided with a butterfly valve 321, a fan 322 and a check valve 323. One of the two first exhaust pipes 32 is used, and the other is standby, and the check valve 323 is used for ensuring that the safety and stability of the constant heat system of the gas replacement steel cylinder in the whole embodiment of the invention are not affected when the fan 322 is operated.
The exhaust steam after heat release flows through the condenser 22 and is conveyed to the exhaust main pipe 31 by the first exhaust pipe 32 under the suction action of the fan 322, and then is discharged to the atmosphere through the exhaust main pipe 31.
Therefore, in the gas replacement steel cylinder constant heat system provided by the embodiment of the invention, hot steam enters the heat exchange unit under the control of the steam control unit, and exhaust steam after heat exchange is discharged out of the system through the drainage steam discharge unit. The constant-temperature heating device has the advantages that the body of the gas steel cylinder is heated at a constant temperature by taking hot steam as a heat source, the problems that the efficiency of pouring the steel cylinder by using cold water is low and the civilized production is influenced in the related art are solved, and the problems of electric shock risks and potential safety hazards existing in the prior art that an electric heating blanket is laid on the surface of the steel cylinder or the steel cylinder is put into an electric heating box (a plurality of electric heating rods are arranged in the box to heat the air in the box to indirectly heat the body of the steel cylinder) are also effectively avoided.
In addition, the gas replacement steel cylinder constant heat system provided by the embodiment of the invention is not only suitable for gas replacement work of a hydrogen-cooled generator set in the thermal power generation industry, but also can be used for gas replacement work of dangerous, toxic and harmful gas systems and storage tanks in the steel, chemical and logistics storage industries by utilizing gas filled in the steel cylinders.
In some embodiments, as shown in fig. 1, the steam control unit further includes a pressure relief valve 113 and a throttle device 114. A pressure reducing valve 113 is provided on the steam header 11 upstream of the pressure control valve 111, and a throttle device 114 is provided in the steam header 11 downstream of the thermo valve 112.
It is understood that the pressure reducing valve 113 performs pressure reducing control on the flow of steam, and the throttle device 114 is a throttle plate. The hot steam is depressurized by the depressurization valve 113 and flows into the cylinder heating box 21 under the control of the thermostatic valve 112 and the orifice. And, the pressure reducing valve 113 and the throttling device 114 can determine whether to need or select one or the other according to the parameters of the connected hot steam system.
In some embodiments, as shown in fig. 1, the steam control unit further includes a shut-off valve 115 and a gate valve 116. A shut-off valve 115 and a gate valve 116 are provided on the main pipe 11, the shut-off valve 115 being located upstream of the pressure reducing valve 113, the gate valve 116 being located downstream of the thermo valve 112 and upstream of the throttle device 114.
It will be appreciated that the shut-off valve 115 and gate valve 116 are used to isolate the hot vapor flowing through the vapor control unit from service or long-term shutdown of the gas displacement cylinder constant heat system of the present invention.
Thus, the steam control unit has a functional flow of hot steam from the shut-off valve 115, the pressure reducing valve 113, the pressure control valve 111, the thermo valve 112, the gate valve 116, and the orifice.
In some embodiments, as shown in fig. 1, the steam control unit further includes a steam sub-pipe 12 and a first normally closed gate valve 121 provided on the steam sub-pipe 12. The input end of the steam sub-pipe 12 is connected to the steam main pipe 11 between the pressure reducing valve 113 and the pressure control valve 111, and the output end of the steam sub-pipe 12 is connected to the steam main pipe 11 between the gate valve 116 and the throttle device 114.
It will be appreciated that a bypass is additionally provided between the pressure reducing valve 113 and the throttle device 114 for manually adjusting the intake in case of failure of the pressure control valve 111, the thermo valve 112 or in need of servicing thereof.
In some embodiments, as shown in fig. 1, the steam drain and exhaust unit further comprises a straight drain pipe 33, a normally closed stop valve 331 arranged on the straight drain pipe 33, a first U-shaped water seal 35 and a second funnel 36 connected with each other, and a second U-shaped water seal 37 and a third funnel 38 connected with each other.
The input end of the straight drain pipe 33 is connected to the steam header 11 between the pressure reducing valve 113 and the input end of the steam sub-pipe 12, and the output end of the straight drain pipe 33 is provided with a first funnel 34. The steel cylinder heating box 21 is also provided with a first water drain end, the condenser 22 is also provided with a second water drain end, and the first water drain end and the second water drain end are connected with the first U-shaped water seal 35 through a pipeline. The exhaust main pipe 31 is connected with a second U-shaped water seal 37.
It can be understood that a U-shaped water seal or a straight exhaust pipe 33 controlled by a stop valve is arranged on the pipeline between the pressure reducing valve 113 and the temperature control valve 112, at the bottom (the first water drain end) of the steel cylinder heating box 21, at the bottom (the second water drain end) of the condenser 22 and at the bottom of the steam exhaust main pipe 31, so that the water drain generated at each functional position of the gas replacement steel cylinder constant heat system in the embodiment of the invention can be better discharged to the outside of the system.
For example, the first U-shaped water seal 35 may perform a sealing function for micro negative pressure in the steel cylinder heating tank 21 and the condenser 22, and the condensed water is discharged out of the tank only when the liquid level of the condensed water is higher than the highest point of the first U-shaped water seal 35, and the outlet of the first U-shaped water seal 35 is connected (or connected through a funnel) to a low-level water drain main pipe of the factory building.
Specifically, the first funnel 34, the second funnel 36 and the third funnel 38 are all connected with a low-level water drainage main pipe of the factory building, and the funnels can observe the water drainage condition.
In some embodiments, as shown in fig. 1, the steam drain and exhaust unit further includes a second steam exhaust pipe 39 and a second normally closed gate valve 391 provided on the second steam exhaust pipe 39, an input end of the second steam exhaust pipe 39 is connected to a second steam output end, and an output end of the second steam exhaust pipe 39 is connected to the steam exhaust main pipe 31.
It will be appreciated that a bypass comprising a normally closed gate valve 116 and piping is provided to the drain gas discharge unit to meet the operational requirements of the gas displacement cylinder constant heat system of the embodiments of the present invention in the event of a fan 322 discharge failure.
The temperature control method according to the embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 2, a temperature control method according to an embodiment of the present invention is used in the gas exchange steel cylinder constant heat system according to any one of the above embodiments, and includes:
when the temperature T measured by the temperature probe of the temperature control valve 112 is higher than the temperature set value T 0 At this time, the opening degree of the thermo valve 112 is reduced.
When the temperature T measured by the temperature probe of the temperature control valve 112 is lower than the temperature set value T 0 In this case, the opening of the thermostatic valve 112 is increased to maintain the temperature in the cylinder heating tank 21 at the temperature set value T 0 Between them.
When the temperature T measured by the temperature probe of the temperature control valve 112 reaches T 1 When the temperature control valve 112 is closed.
When the pressure probe of the pressure control valve 111 detects that the pressure of the gas inlet pipeline of the gas replacement system reaches or is lower than the minimum allowable pressure P of the gas cylinder, or the temperature detected by the temperature detecting probe of the temperature control valve 112 reaches T 1 And after 10 seconds the temperature has not yet fallen, the pressure control valve 111 is closed.
When the temperature control valve 112 and the pressure control valve 111 are closed at the same time, the fan 322 is shut down after a delay of 20 s.
Wherein the temperature is set to T 0 The parameter range of (C) is 35-40 ℃, T 1 The minimum allowable pressure P of the gas steel cylinder is 0.1MPa at 40 ℃.
In addition, the automatic start-stop function of the pressure control valve 111, the temperature control valve 112 and the blower 322 is realized by accessing a factory DCS control system or a programmable PLC controller separately.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.

Claims (10)

1. A gas substitution cylinder constant heat system, comprising:
the steam control unit comprises a steam main pipe, and a pressure control valve and a temperature control valve which are sequentially arranged on the steam main pipe along the direction from upstream to downstream;
the heat exchange unit comprises a steel cylinder heating box and a condenser, wherein a plurality of gas steel cylinders are arranged in the steel cylinder heating box, a first steam input end and a first steam output end are arranged on the steel cylinder heating box, the output end of a steam main pipe is connected with the first steam input end, the condenser is provided with a second steam input end and a second steam output end, the first steam output end is connected with the second steam input end through a pipeline, a pressure probe of a pressure control valve is arranged on an air inlet pipeline of a gas replacement system, and a temperature measuring probe of a temperature control valve is arranged in the steel cylinder heating box;
the steam exhaust unit comprises a steam exhaust main pipe, a plurality of first steam exhaust pipes, and a butterfly valve, a fan and a check valve which are sequentially arranged on the first steam exhaust pipes along the direction from upstream to downstream, wherein the input end of each first steam exhaust pipe is connected with the second steam output end, and the output end of each first steam exhaust pipe is connected with the steam exhaust main pipe.
2. The gas displacement cylinder constant heat system according to claim 1, wherein the steam control unit further comprises a pressure reducing valve provided on the steam header upstream of the pressure control valve, and a throttle device provided in the steam header downstream of the temperature control valve.
3. The gas displacement cylinder constant heat system according to claim 2, wherein the steam control unit further comprises a stop valve and a gate valve, both of which are provided on the steam header, the stop valve being located upstream of the pressure reducing valve, the gate valve being located downstream of the temperature control valve and upstream of the throttle device.
4. A gas displacement cylinder constant heat system according to claim 3, wherein the steam control unit further comprises a steam sub-pipe and a first normally closed gate valve provided on the steam sub-pipe, an input end of the steam sub-pipe being connected to the steam main pipe between the pressure reducing valve and the pressure control valve, and an output end of the steam sub-pipe being connected to the steam main pipe between the gate valve and the throttle device.
5. The constant heat system of a gas displacement steel cylinder according to claim 4, wherein the drain steam discharging unit further comprises a straight drain pipe and a normally closed stop valve arranged on the straight drain pipe, an input end of the straight drain pipe is connected with the steam mother pipe between the pressure reducing valve and an input end of the steam sub pipe, and an output end of the straight drain pipe is provided with a first funnel.
6. The constant heat system of claim 1, wherein the cylinder heating box is further provided with a first water drain end, the condenser is further provided with a second water drain end, the water drain and steam exhaust unit further comprises a first U-shaped water seal and a second funnel which are connected, and the first water drain end and the second water drain end are connected with the first U-shaped water seal through a pipeline.
7. The constant heat system of a gas displacement steel cylinder according to claim 6, wherein the hydrophobic exhaust unit further comprises a second U-shaped water seal and a third funnel connected to each other, and the exhaust main pipe is connected to the second U-shaped water seal.
8. The constant heat system of a gas displacement steel cylinder according to claim 1, wherein the drain steam discharging unit further comprises a second steam discharging pipe and a second normally closed gate valve arranged on the second steam discharging pipe, an input end of the second steam discharging pipe is connected with the second steam output end, and an output end of the second steam discharging pipe is connected with the steam discharging main pipe.
9. A method of temperature control for a gas displacement cylinder constant heat system as claimed in any one of claims 1 to 8, the method comprising:
when the temperature T measured by the temperature measuring probe of the temperature control valve is higher than the temperature set value T 0 Reducing the opening of the temperature control valve;
when the temperature T measured by the temperature measuring probe of the temperature control valve is lower than the temperature settingValue T 0 When the opening degree of the temperature control valve is increased, the temperature in the steel cylinder heating box is maintained at a temperature set value T 0 Between them;
when the temperature T measured by the temperature measuring probe of the temperature control valve reaches T 1 Closing the temperature control valve when the temperature control valve is closed;
when the pressure probe of the pressure control valve detects that the pressure of the air inlet pipeline of the gas replacement system reaches or is lower than the minimum allowable pressure P of the gas steel cylinder, or the temperature detected by the temperature detecting probe of the temperature control valve reaches T 1 And closing the pressure control valve when the temperature is not reduced after 10 s;
wherein the temperature is set to T 0 The parameter range of (C) is 35-40 ℃, T 1 At 40 ℃, the minimum allowable pressure P of the gas steel cylinder is 0.1MPa.
10. The temperature control method according to claim 9, wherein the blower is stopped after a delay of 20s when the temperature control valve and the pressure control valve are closed at the same time.
CN202310433788.4A 2023-04-21 2023-04-21 Constant heat system of gas replacement steel cylinder and temperature control method Pending CN116557777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310433788.4A CN116557777A (en) 2023-04-21 2023-04-21 Constant heat system of gas replacement steel cylinder and temperature control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310433788.4A CN116557777A (en) 2023-04-21 2023-04-21 Constant heat system of gas replacement steel cylinder and temperature control method

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Publication Number Publication Date
CN116557777A true CN116557777A (en) 2023-08-08

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Application Number Title Priority Date Filing Date
CN202310433788.4A Pending CN116557777A (en) 2023-04-21 2023-04-21 Constant heat system of gas replacement steel cylinder and temperature control method

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Country Link
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