CN112984374A - Tank container for liquid ammonia - Google Patents

Tank container for liquid ammonia Download PDF

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Publication number
CN112984374A
CN112984374A CN201911284375.4A CN201911284375A CN112984374A CN 112984374 A CN112984374 A CN 112984374A CN 201911284375 A CN201911284375 A CN 201911284375A CN 112984374 A CN112984374 A CN 112984374A
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CN
China
Prior art keywords
liquid ammonia
heater
liquid
heat
tank
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
CN201911284375.4A
Other languages
Chinese (zh)
Inventor
陆晔飞
徐玮
周青
陆琳艺
施建荣
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.)
Zhongji An Ruihuan Technology Co ltd
Original Assignee
Zhongji An Ruihuan Technology 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 Zhongji An Ruihuan Technology Co ltd filed Critical Zhongji An Ruihuan Technology Co ltd
Priority to CN201911284375.4A priority Critical patent/CN112984374A/en
Publication of CN112984374A publication Critical patent/CN112984374A/en
Pending legal-status Critical Current

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    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • 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
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • 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
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • 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
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • 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
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F17C13/126—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for large storage containers for liquefied gas
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/013—Single phase liquid
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2227/0304—Heat exchange with the fluid by heating using an electric heater
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0439—Temperature
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0689—Methods for controlling or regulating
    • F17C2250/0694—Methods for controlling or regulating with calculations
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/036—Avoiding leaks

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention provides a liquid ammonia tank type container which comprises a frame, a tank body, a heating evaporation system, a gas phase pipeline, a liquid ammonia temperature detector, a heat-carrying liquid temperature detector and a control system. The heating evaporation system comprises a coil pipe for the flowing of the heat-carrying liquid, a circulating pump for providing the flowing power of the heat-carrying liquid and a heater for heating the heat-carrying liquid; the coil is positioned in the tank body or wound on the outer wall of the tank body, and liquid ammonia in the tank body is heated to be converted into gaseous ammonia and output; the gas phase pipeline is communicated with the gas phase space of the tank body and is used for outputting gaseous ammonia; the liquid ammonia temperature detector is communicated with the interior of the tank body and is used for detecting the real-time temperature of liquid ammonia in the tank body; the heat carrying liquid temperature detector is communicated with the coil and is used for detecting the real-time temperature of the heat carrying liquid; the control system is respectively electrically connected with the heater, the liquid ammonia temperature detector and the heat-carrying liquid temperature detector, and controls the heater to be started when the real-time temperature of the liquid ammonia and the real-time temperature of the heat-carrying liquid are lower than a preset temperature value.

Description

Tank container for liquid ammonia
Technical Field
The invention relates to the technical field of liquid ammonia storage and transportation equipment, in particular to a liquid ammonia tank type container.
Background
During the production of semiconductor materials, nitrogen is used as a shielding gas during soldering. Nitrogen contains a certain amount of oxygen, and in order to remove the oxygen, it is necessary to reduce the nitrogen by hydrogen, and hydrogen is obtained by decomposing liquid ammonia. The liquid ammonia needs to absorb heat into gaseous ammonia before entering the decomposition device.
At present, liquid ammonia passes through liquid ammonia tank container transportation, restores to the liquid ammonia storage tank again, and the user is when using, exports liquid ammonia through the liquid ammonia storage tank, adopts modes such as fin air heat transfer, steam plate heat transfer or electric heating water bath heat transfer to heat the evaporation and obtain gaseous ammonia after, reentrant decomposition equipment. In the use method, the risk of leakage exists when the liquid ammonia in the liquid ammonia tank container is transferred to the liquid ammonia storage tank.
Disclosure of Invention
The invention aims to provide a liquid ammonia tank container which is safer to use, and aims to solve the problems in the prior art.
In order to solve the above technical problem, the present invention provides a liquid ammonia tank container, which comprises a frame and a tank body arranged in the frame, wherein the liquid ammonia tank container further comprises: the heating evaporation system comprises a coil pipe for supplying the heat-carrying fluid to flow, a circulating pump for supplying the heat-carrying fluid to flow power and a heater for heating the heat-carrying fluid; the coil is positioned in the tank body or wound on the outer wall of the tank body, and liquid ammonia in the tank body is heated to be converted into gaseous ammonia to be output; the gas phase pipeline is communicated with the gas phase space of the tank body and is used for outputting gaseous ammonia; the liquid ammonia temperature detector is communicated with the interior of the tank body and is used for detecting the real-time temperature of liquid ammonia in the tank body; the heat carrying liquid temperature detector is communicated with the coil and is used for detecting the real-time temperature of the heat carrying liquid; and the control system is respectively electrically connected with the heater, the liquid ammonia temperature detector and the heat-carrying liquid temperature detector, and controls the heater to be started when the real-time temperature of the liquid ammonia and the real-time temperature of the heat-carrying liquid are lower than a preset temperature value.
In one embodiment, the system further comprises a pressure limiting device; the pressure limiting device is communicated with the tank body and is electrically connected with the control system, so that when the pressure value in the tank body reaches the threshold value of the pressure limiting device, the control system controls the heater to stop heating.
In one embodiment, the gas phase pipeline is provided with a flow detector for detecting the flow rate of the gaseous ammonia output from the gas phase output pipeline, the flow detector is electrically connected with the control system, and the control system controls the heating power of the heater according to the flow rate.
In one embodiment, the gas phase pipeline is provided with a pressure detector for detecting the pressure of the gaseous ammonia output from the gas phase output pipeline, the pressure detector is electrically connected with the control system, and the control system controls the heating power of the heater according to the pressure.
In one embodiment, the power of the heater is not less than 1.3 times the power required for the maximum unloading flow of the tank.
In one embodiment, the heating evaporation system further comprises a temperature limiting device; the temperature limiting device is communicated with the heater and electrically connected with the control system, so that when the temperature in the heater reaches the threshold value of the temperature limiting device, the control system controls the heater to stop heating.
In one embodiment, an input pipeline is connected between the input port of the coil pipe and the inlet of the circulating pump, and an output pipeline is connected between the output port of the coil pipe and the outlet of the circulating pump; the input pipeline and the output pipeline are both positioned outside the tank body; the heater is arranged on the input pipeline or the output pipeline.
In one embodiment, the thermal evaporation system further comprises an expansion tank; the expansion tank is connected with the output port of the coil pipe and the output pipeline; the expansion tank is connected with the top side beam of the frame.
In one embodiment, the circulation pump and the heater are respectively connected to the bottom side beams of the frame to be fixed.
In one embodiment, the circulating pump and the heater both adopt an explosion-proof structure; the circulating pump and the heater are detachably connected with the bottom side beam respectively.
In one embodiment, the control system comprises a cabinet body and a control unit arranged in the cabinet body; the cabinet body adopts explosion-proof construction, the control unit respectively with the heater, liquid ammonia thermodetector with heat-carrying fluid thermodetector electricity is connected.
According to the technical scheme, the invention has the advantages and positive effects that:
the liquid ammonia tank container of the invention converts liquid ammonia in the tank body into gaseous ammonia through the heating evaporation system, and can be directly conveyed to a user end for use, thereby reducing the steps of transferring and storing and reducing the risk of leakage in the transferring and storing process. And this liquid tank container not only can transport and store liquid ammonia, can also make liquid ammonia turn into gaseous ammonia through the heating, increases the internal pressure of jar and realizes the function of uninstallation to directly accomplished the process that liquid ammonia increased to gaseous ammonia, simplified "transportation, transfer, evaporation, use" process of traditional liquid ammonia into "transportation, use", promoted this liquid ammonia tank container's use value.
This liquid ammonia tank container is with the real-time temperature of detecting the internal liquid ammonia of jar through liquid ammonia thermodetector in, through the real-time temperature that heat-carrying fluid thermodetector detected circulation pipeline and carried the hydrothermal solution, and only the heater just begins to heat when both temperatures all are less than the temperature default, has improved the accuracy of heating, has guaranteed the security.
Drawings
FIG. 1 is a schematic diagram of the structure of one embodiment of a liquid ammonia tank container of the present invention;
FIG. 2 is a schematic view of a heated evaporation system of the present invention.
The reference numerals are explained below:
1. a frame; 2. a tank body; 3. heating the evaporation system; 31. a circulation pump; 32. an input pipeline; 33. an output pipeline; 34. a coil pipe; 35. a heater; 36. a temperature limiting device; 37. an expansion tank; 4. a gas phase line; 5. a liquid ammonia temperature detector; 6. a heat carrier liquid temperature detector; 7. and (5) controlling the system.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.
For further explanation of the principles and construction of the present invention, reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings.
Referring to fig. 1, the present invention provides a liquid ammonia tank container, which includes a tank 2, a frame 1 supporting the tank 2, a liquid ammonia temperature detector 5, a heat carrier liquid temperature detector 6, a heating and evaporating system 3, a control system 7, a flow detector, and a gas phase pipeline 4. The liquid ammonia in the tank body 2 is heated by the heating evaporation system 3, so that the liquid ammonia tank container directly outputs gaseous ammonia.
The frame 1 includes a front end frame and a rear end frame arranged at an interval, and a top side beam and a bottom side beam connecting the front end frame and the rear end frame.
Tank 2 sets up in frame 1 for load liquid ammonia. The top of the tank body 2 is provided with a gas phase output port for outputting gaseous ammonia.
The gas phase pipeline 4 is communicated with the gas phase output port and is communicated with the gas phase space in the tank body 2, and further outputs the gaseous ammonia. Specifically, a gas phase valve is arranged on the gas phase pipeline 4 to control the on-off of the tank body 2 and the outside.
For convenience of description, the axial direction of the tank body 2 is defined as the longitudinal direction of the frame 1, that is, the axial direction of the tank body 2 is parallel to the longitudinal direction of the roof side beam.
The heating evaporation system 3 is used for providing heat for the liquid ammonia in the tank body 2, so that the liquid ammonia absorbs the heat and is converted into gaseous ammonia, and the gaseous ammonia is generated to increase the pressure in the tank body 2 so as to be output outwards, thereby realizing the unloading of the liquid ammonia tank container.
Referring to fig. 2, the heating and evaporating system 3 includes a circulating pump 31, an input pipe 32, an output pipe 33, a coil pipe 34, a heater 35, and an expansion tank 37.
The inlet line 32, the outlet line 33, the coil 34 and the circulation pump 31 form a closed circulation path in which the heat carrier liquid flows. Wherein, the heat-carrying liquid is heat-conducting liquid, such as water, glycol or other liquids. The heat-carrying liquid exchanges heat with the liquid ammonia, so that the liquid ammonia absorbs the heat of the heat-carrying liquid and is further converted into gaseous ammonia.
In this embodiment, the coil 34 is disposed in the tank 2. Specifically, the coil 34 includes a plurality of layers of pipes arranged in parallel up and down, each layer of pipes including an inlet pipe section, an outlet pipe section, and a transition pipe section connecting the inlet pipe section and the outlet pipe section. And a multilayer line of coiled tubing 34 is arranged from the top of the tank 2 to the bottom of the tank 2.
Each layer of pipeline can be provided with a plurality of inlet pipe sections, outlet pipe sections and transition pipe sections according to the requirement.
In other embodiments, the middle part of the tank 2 in the height direction may be arranged to the bottom of the tank 2, and the arrangement may be specifically set according to actual needs.
In this embodiment, the coil 34 has an input port and two output ports. The input port of the coil pipe 34 is located in the middle of the tank body 2 in the height direction, and the top and the bottom of the coil pipe 34 are respectively provided with an output port. After entering the coil 34, the heat-carrying liquid is divided into two parallel paths and flows, wherein one path flows to the top of the tank body 2, and the other path flows to the bottom of the tank body 2 and respectively reaches the output port of the coil 34.
The input and output ports of the coil 34 are located at the rear end of the frame 1, i.e. near the rear end bell.
The inlet line 32 is connected to the inlet of the coil 34 and the inlet line 32 is located outside the tank 2. A control valve is provided on the input line 32 to control the connection and disconnection between the input line 32 and the coil 34. Specifically, the input line 32 is a hose.
In this embodiment, the input pipe 32 extends from the middle of the frame 1 to the rear end frame and is connected to the input port of the coil pipe 34.
The output line 33 is connected with the input and output of the coil 34 and is positioned outside the tank 2. The output line 33 is provided with a control valve to control the connection between the output line 33 and the coil 34. Specifically, the input and output pipeline is a PVC hose.
In this embodiment, the output pipeline 33 extends from the middle of the frame 1 to the rear end frame and is connected to the output port of the coil pipe 34.
The circulation pump 31 has an inlet end connected to the inlet line 32 and an outlet end connected to the outlet line 33. The circulation pump 31 provides power for the heat transfer fluid to flow, so that the heat transfer fluid continuously flows in the circulation passage.
Specifically, the circulation pump 31 is disposed at a side portion of the frame 1, and the circulation pump 31 is detachably connected to the frame 1 by means of a fastener. The arrangement mode enables the circulating pump 31 to be more convenient to overhaul and maintain.
In this embodiment, the circulation pump 31 is connected to the bottom side beam and is located in the middle of the frame 1 in the length direction, so as to fix the circulation pump 31. The middle part of the frame 1 in the length direction is not particularly the center point of the frame 1 in length, but includes the area including the center point.
In this embodiment, circulating pump 31 adopts explosion-proof structure, has improved the security level that heating vaporization system 3 changed, makes liquid ammonia tank container safer at the uninstallation in-process. In other embodiments, the circulating pump 31 may also adopt a non-explosion-proof structure according to actual conditions.
In other embodiments, the coil 34 may be disposed around the outer wall of the tank 2.
The heater 35 is provided on the output line 33 and heats the heat medium in the circulation passage. In other embodiments, the heater 35 may also be disposed on the input line 32.
The heater 35 is disposed at a side portion of the frame 1, and the heater 35 is detachably connected to the frame 1 by means of a fastener. In this embodiment, the heater 35 is connected to the bottom side beam and is close to the rear end frame, so as to fix the heater 35. The arrangement makes the maintenance and repair of the heater 35 more convenient.
Specifically, the heater 35 adopts an explosion-proof structure, which improves the safety level of the heating evaporation system 3, and makes the liquid ammonia tank container safer in the unloading process. In other embodiments, the heater 35 may also be of a non-explosion-proof structure, depending on the actual situation.
The expansion tank 37 communicates with the outlet of the coil 34 and the outlet line 33. The expansion tank 37 is used for compensating volume change of the circulating heat-carrying liquid in the heating and refrigerating processes and evacuating gas in a circulating pipeline.
The expansion tank 37 is detachably connected with the top side beam in a fastening manner, so that the expansion tank 37 is fixed. In this embodiment, the expansion tank 37 is provided near the rear end frame.
When this heating vaporization system 3 changes the use, through heater 35 heating heat carrier liquid, make heat carrier liquid circulate through circulating pump 31, make the temperature of heat carrier liquid in the coil pipe 34 be higher than the temperature of the interior liquid ammonia of jar body 2, and then liquid ammonia carries out heat exchange with heat carrier liquid, absorb the temperature of heat carrier liquid after, liquid ammonia turns into gaseous ammonia, gaseous ammonia passes through gas phase pipeline 4 and carries to the user, but the user directly uses. The steps of unloading are reduced, and the risk of leakage in the unloading process is reduced. And this liquid tank container not only can transport and store liquid ammonia, can also make liquid ammonia turn into gaseous ammonia through the heating and increase the function that the pressure in the jar body 2 and realize the uninstallation to directly accomplished the process that liquid ammonia increased to gaseous ammonia, simplified "transportation, transfer, evaporation, use" process of traditional liquid ammonia into "transportation, use", promoted this liquid ammonia tank container's use value.
Liquid ammonia thermodetector 5 communicates with the inside of jar body 2, specifically, communicates with the liquid phase space of jar body 2 for detect the real-time temperature of the interior liquid ammonia of jar body 2. In this embodiment, the liquid ammonia temperature detector 5 is a temperature probe. And the liquid ammonia temperature detector 5 is arranged at the bottom of the tank body 2.
The heat carrier liquid temperature detector 6 is provided on the input line 32, and detects a real-time temperature of the heat carrier liquid in the circulation passage. The heat transfer medium temperature detector 6 can also be arranged on the output line 33. In this embodiment, the heat medium temperature detector 6 is a temperature probe.
The control system 7 comprises a cabinet body, and a control unit, a GPS unit and a monitoring unit which are arranged in the cabinet body.
The cabinet body adopts an explosion-proof structure, and the safety level of the control system 7 is improved. The cabinet body sets up in the lateral part of frame 1, and the cabinet body passes through the mode of fastener and can dismantle with frame 1 and be connected. In this embodiment, the cabinet body is connected with the bottom side beam, and the cabinet body is fixed, so that the heater 35 is more convenient to overhaul and maintain by the arrangement mode.
In this embodiment, the cabinet, the circulating pump 31 and the heater 35 are located on the same side of the tank body 2 and are sequentially arranged along the direction from the front end frame to the rear end frame, that is, the heater 35 is close to the rear end frame, the circulating pump 31 is located in the middle of the bottom side beam, and the cabinet is located between the front end frame and the circulating pump 31.
In other embodiments, the cabinet may also be disposed at the rear end frame.
The control unit is electrically connected with the heater 35, the liquid ammonia temperature detector 5 and the heat carrier liquid temperature detector 6 respectively.
The control unit receives the real-time temperature of the liquid ammonia temperature detector 5 and the real-time temperature of the heat-carrying liquid temperature detector 6, and controls the heater 35 to heat when the real-time temperatures of the liquid ammonia and the heat-carrying liquid are lower than the preset temperature values.
The temperature preset value is calculated by the corresponding relation between the pressure of saturated ammonia gas and the temperature, wherein the pressure of the saturated ammonia gas comes from the requirement of a customer.
The liquid ammonia temperature detector 5 detects the real-time temperature of liquid ammonia in the tank body 2, the heat-carrying liquid temperature detector 6 detects the real-time temperature of the hot liquid carried on the circulating pipeline, and the heater 35 starts to heat only when the temperatures of the liquid ammonia and the heat-carrying liquid are lower than a preset temperature value, so that the accuracy is improved, and the safety is guaranteed. The condition that the unloading flow of the gaseous ammonia is higher than the requirement of a customer because the heater 35 starts heating when one of the liquid ammonia or the heat carrier liquid is lower than the preset temperature value is avoided.
For example, when the temperature of the heat carrying liquid is lower than the preset temperature value, but the temperature value of the liquid ammonia is higher than or equal to the preset temperature value, the liquid ammonia is enough to be converted into gaseous ammonia, if the heater 35 starts to heat, the temperature of the heat carrying liquid will rise, and the temperature of the liquid ammonia will rise, so that the unloading flow of the gaseous ammonia is larger than the customer demand. Or the temperature of the liquid ammonia is lower than the preset temperature value, but the temperature value of the heat carrying liquid is higher than the preset temperature value, at this time, heat exchange can be further performed between the liquid ammonia and the heat carrying liquid, so that the temperature of the liquid ammonia meets the requirement, if the heater 35 heats at this time, the temperature of the liquid ammonia is finally too high, and the unloading flow of the gaseous ammonia is larger than the requirement of a customer.
Further, the heating and evaporating system 3 further comprises a temperature limiting device 36, and the temperature limiting device 36 is electrically connected with the control unit. The temperature limiting device 36 is used for detecting the temperature in the heater 35, when the temperature in the heater 35 reaches the threshold value of the temperature limiting device 36, the temperature limiting device 36 sends the signal to the control unit, and the control unit controls the heater 35 to stop heating according to the signal. When the circulation pump 31 stops working due to a fault, the heater 35 continuously heats when the temperatures detected by the liquid ammonia temperature detector 5 and the heat-carrying liquid temperature detector 6 are lower than the preset temperature value, so that the temperature in the heater 35 is too high, and even the heat-carrying liquid is vaporized to cause the pressure in the circulation pipeline to be too high.
In particular, the temperature limiting device 36 is a temperature probe.
Further, the liquid ammonia tank container also comprises a pressure limiting device. The pressure limiting device is communicated with the interior of the tank body 2 and is used for detecting the real-time pressure in the tank body 2. The pressure limiting device is electrically connected with the control unit, when the pressure limiting device detects that the pressure in the tank body 2 reaches the threshold value of the pressure limiting device, the pressure limiting device sends the signal to the control unit, and the control unit controls the heater 35 to stop heating according to the signal, so that the temperature of the heat carrying liquid does not continuously rise, the liquid ammonia is reduced to be converted into gaseous ammonia, the pressure in the tank body 2 is prevented from continuously increasing, and the safety of the tank body 2 is ensured.
In particular, the threshold value of the pressure limiting device is smaller than the design pressure value of the tank 2. For example, 0.9 times the design pressure value of the tank 2, 0.8 times the design pressure value of the tank 2, etc.
The flow detector is arranged on the gas phase pipeline 4 of the tank body 2 and is used for detecting the flow of the gaseous ammonia output from the gas phase pipeline 4. The flow detector is electrically connected to the control unit and sends the flow of gaseous ammonia to the control unit. The control unit calculates the heating power of the heater 35 according to the difference between the flow rate and the preset flow rate value, and controls the heater 35 to heat with the heating power, so that the final flow rate of the gaseous ammonia in the gas phase pipeline 4 is the same as the preset flow rate, unloading is more accurate, and customer requirements are better met.
The control unit controls the heater 35 to heat through the solid-state relay. In this embodiment, the solid state relay is a thyristor solid state relay.
Specifically, the rated power of the heater 35 is 1.3 times the power required for the maximum unloading flow of the tank 2.
In other embodiments, the flow detector may also be a pressure detector. The heating power of the heater 35 is calculated according to the difference between the detected pressure and the preset pressure.
In another embodiment, the gas phase pipeline 4 may be provided with a flow detector and a pressure detector. The two can be backed up by each other, i.e. the control unit calculates the heating power of the heater 35 according to one of them. The two can also work simultaneously, namely the control unit finally calculates to obtain heating power according to the detection values of the two.
The GPS unit is used for detecting the position of the liquid ammonia tank container in real time in the transportation process of the liquid ammonia tank container, the position information is uploaded to the cloud database, and a user can check the position of the liquid ammonia tank container through the cloud database.
The monitoring unit is used for monitoring the operation state information of the liquid ammonia tank container, such as the pressure and the temperature in the tank body 2, the temperature of the heating evaporation system 3 and the like.
The liquid ammonia tank container can be used for transporting liquid ammonia, can be positioned by the GPS unit when in use, and can also monitor the state of the liquid ammonia tank container by the monitoring unit; after the liquid ammonia is transported to the destination, the liquid ammonia is unloaded, and the gaseous ammonia is directly output through the liquid ammonia tank container for users to use.
The unloading process of the liquid ammonia tank container is as follows:
s1, detecting the real-time temperature of the liquid ammonia in the tank body 2 and the real-time temperature of the heat-carrying liquid in the circulating pipeline, and comparing the real-time temperatures with a preset temperature value.
And S2, controlling the heater 35 to start to heat when the real-time temperature of the liquid ammonia and the real-time temperature of the heat-carrying liquid are both lower than the preset temperature values.
Specifically, the heater 35 heats the heat carrying liquid, and the heat carrying liquid flows in the circulation pipeline, so that the heat carrying liquid and the liquid ammonia perform heat exchange, and the liquid ammonia absorbs the heat and then is converted into gaseous ammonia.
And S3, detecting the flow of the gaseous ammonia output by the gas phase pipeline 4, and comparing the flow with a preset flow value.
S4, obtaining the heating power of the heater 35 according to the difference between the preset flow value and the flow value of the ammonia gas, and controlling the heater 35 to heat with the heating power.
S5, when the pressure in the tank 2 exceeds the threshold value of the pressure limiting device, the control unit controls the heater 35 to stop heating.
S6, the control unit controls the heater 35 to stop heating when the temperature in the heater 35 exceeds the threshold value of the temperature limit device 36.
It is to be specifically noted that the control unit, the GPS unit, and the monitoring unit may not be limited to their physical states, that is, in the above-described embodiments, the control unit, the GPS unit, and the monitoring unit are respectively separate structures, and may also be integrated.
According to the technical scheme, the invention has the advantages and positive effects that:
the liquid ammonia tank container of the invention converts liquid ammonia in the tank body into gaseous ammonia through the heating evaporation system, and can be directly conveyed to a user end for use, thereby reducing the steps of transferring and storing and reducing the risk of leakage in the transferring and storing process. And this liquid tank container not only can transport and store liquid ammonia, can also make liquid ammonia turn into gaseous ammonia through the heating, increases the internal pressure of jar and realizes the function of uninstallation to directly accomplished the process that liquid ammonia increased to gaseous ammonia, simplified "transportation, transfer, evaporation, use" process of traditional liquid ammonia into "transportation, use", promoted this liquid ammonia tank container's use value.
This liquid ammonia tank container is with the real-time temperature of detecting the internal liquid ammonia of jar through liquid ammonia thermodetector in, through the real-time temperature that heat-carrying fluid thermodetector detected circulation pipeline and carried the hydrothermal solution, and only when the temperature between them all is less than the temperature default the heater 35 just begins to heat, has improved the accuracy of heating, has guaranteed the security.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (11)

1. The utility model provides a liquid ammonia tank formula container, include the frame with set up in jar body in the frame, its characterized in that, liquid ammonia tank formula container still includes:
the heating evaporation system comprises a coil pipe for supplying the heat-carrying fluid to flow, a circulating pump for supplying the heat-carrying fluid to flow power and a heater for heating the heat-carrying fluid; the coil is positioned in the tank body or wound on the outer wall of the tank body, and liquid ammonia in the tank body is heated to be converted into gaseous ammonia to be output;
the gas phase pipeline is communicated with the gas phase space of the tank body and is used for outputting gaseous ammonia;
the liquid ammonia temperature detector is communicated with the interior of the tank body and is used for detecting the real-time temperature of liquid ammonia in the tank body;
the heat carrying liquid temperature detector is communicated with the coil and is used for detecting the real-time temperature of the heat carrying liquid;
and the control system is respectively electrically connected with the heater, the liquid ammonia temperature detector and the heat-carrying liquid temperature detector, and controls the heater to be started when the real-time temperature of the liquid ammonia and the real-time temperature of the heat-carrying liquid are lower than preset temperature values.
2. The liquid ammonia tank container of claim 1, further comprising a pressure limiting device; the pressure limiting device is communicated with the tank body and is electrically connected with the control system, so that when the pressure value in the tank body reaches the threshold value of the pressure limiting device, the control system controls the heater to stop heating.
3. The liquid ammonia tank container as claimed in claim 1, wherein the gas phase pipeline is provided with a flow detector for detecting the flow of the gaseous ammonia outputted from the gas phase output pipeline, and the flow detector is electrically connected to the control system, and the control system controls the heating power of the heater according to the flow.
4. The liquid ammonia tank container as claimed in claim 1, wherein the gas phase pipeline is provided with a pressure detector for detecting the pressure of the gaseous ammonia outputted from the gas phase output pipeline, and the pressure detector is electrically connected to the control system, and the control system controls the heating power of the heater according to the pressure.
5. The liquid ammonia tank container of claim 3 or 4, wherein the power of the heater is not less than 1.3 times the power required for the maximum unloading flow of the tank.
6. The liquid ammonia tank container of claim 1, wherein the heating and evaporation system further comprises a temperature limiting device; the temperature limiting device is communicated with the heater and electrically connected with the control system, so that when the temperature in the heater reaches the threshold value of the temperature limiting device, the control system controls the heater to stop heating.
7. The liquid ammonia tank container according to claim 1, wherein an input pipeline is connected between the input port of the coil pipe and the inlet port of the circulating pump, and an output pipeline is connected between the output port of the coil pipe and the outlet port of the circulating pump;
the input pipeline and the output pipeline are both positioned outside the tank body;
the heater is arranged on the input pipeline or the output pipeline.
8. The liquid ammonia tank container of claim 7, wherein the heating and evaporation system further comprises an expansion tank; the expansion tank is connected with the output port of the coil pipe and the output pipeline;
the expansion tank is connected with the top side beam of the frame.
9. The liquid ammonia tank container of claim 1, wherein the circulation pump and the heater are respectively connected to bottom side beams of the frame for fixation.
10. The liquid ammonia tank container of claim 9, wherein the circulation pump and the heater are of an explosion-proof construction;
the circulating pump and the heater are detachably connected with the bottom side beam respectively.
11. The liquid ammonia tank container of claim 1, wherein the control system comprises a tank body and a control unit disposed within the tank body; the cabinet body adopts explosion-proof construction, the control unit respectively with the heater, liquid ammonia thermodetector with heat-carrying fluid thermodetector electricity is connected.
CN201911284375.4A 2019-12-13 2019-12-13 Tank container for liquid ammonia Pending CN112984374A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911284375.4A CN112984374A (en) 2019-12-13 2019-12-13 Tank container for liquid ammonia

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911284375.4A CN112984374A (en) 2019-12-13 2019-12-13 Tank container for liquid ammonia

Publications (1)

Publication Number Publication Date
CN112984374A true CN112984374A (en) 2021-06-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911284375.4A Pending CN112984374A (en) 2019-12-13 2019-12-13 Tank container for liquid ammonia

Country Status (1)

Country Link
CN (1) CN112984374A (en)

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