Liquefied petroleum gas heating and storing system

Abstract

The utility model provides a liquefied petroleum gas heating and storing system, and relates to the technical field of liquefied petroleum gas. The heating storage system comprises a heating tank, a heat supplementing tank, a heating device and a pressure tank, the heat supplementing tank is connected with the heating tank, the heating device is connected with the heat supplementing tank and the heating tank, the pressure tank is connected with the heating tank and the heating device, and the heat supplementing tank is used for conveying a heat source to the heating tank; the heat source exchanges heat with to-be-heated liquefied petroleum gas in the heating tank to form a working medium, and the heating device is used for receiving and heating the working medium to form a heat source and conveying the heat source to the heat compensation tank; the pressure tank is used for storing the liquefied petroleum gas heated by the heating tank and conveying part of the gaseous liquefied petroleum gas in the pressure tank to the heating device. The gaseous liquefied petroleum gas is conveyed to the heating device, the heating device receives and heats the working medium to form the heat source, the heat source is conveyed to the heat supplementing tank, the heat supplementing tank conveys the heat source to the heating tank to heat the liquefied petroleum gas to be heated, the energy utilization efficiency is improved, and the equipment operation cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of liquefied petroleum gas, and particularly to a liquefied petroleum gas heating and storage system. Background Art

[0002] The main functions of a cryogenic LPG (Liquefied Petroleum Gas) tank farm project are to receive, store, and export cryogenic LPG, and output the stored cryogenic LPG to downstream units or for external sale. The liquid-phase LPG in the cryogenic LPG storage tank is boosted in pressure and then sent to a liquefied petroleum gas heating component to be heated to about 5°C, and then output to downstream units or stored in an LPG pressure tank. The heat source for heating liquefied petroleum gas is usually purchased externally as steam, resulting in high operating costs.

[0003] LPG liquid gasification occurs in the LPG pressure tank, thus forming a state where there is gaseous LPG in the upper part and liquid LPG in the lower part. As the ambient temperature rises, the gaseous LPG increases, and the gas pressure in the upper part of the LPG pressure tank rises. Some of the gaseous LPG needs to be compressed and then transported back into the tank, increasing energy consumption. If the gas pressure in the pressure tank continues to rise, this part of the gas needs to be discharged to an emergency treatment system (such as a flare) for incineration treatment, resulting in low energy utilization efficiency and high equipment operating costs. Utility Model Content

[0004] This application provides a liquefied petroleum gas heating and storage system, which can reduce the system's dependence on external heat sources, improve energy utilization efficiency, and reduce equipment operating costs.

[0005] This application provides a liquefied petroleum gas heating and storage system, comprising:

[0006] A heating component, the heating component includes a heating tank, a heat supplement tank, and a heating device. The heat supplement tank is connected to the heating tank, and the heating device is connected to the heat supplement tank and the heating tank. The heating tank contains liquefied petroleum gas to be heated, and the heat supplement tank is used to transport a heat source to the heating tank; after the heat source exchanges heat with the liquefied petroleum gas to be heated, a working medium is formed, and the heating device is used to receive and heat the working medium to form the heat source, and then transport the heat source to the heat supplement tank;

[0007] A storage component, the storage component is connected to the heating component, the storage component includes a pressure tank, the pressure tank is connected to the heating tank and the heating device, and the pressure tank is used to store the liquefied petroleum gas heated by the heating tank, and transport part of the gaseous liquefied petroleum gas in the pressure tank to the heating device.

[0008] In some embodiments, the heating component further includes:

[0009] A first pump, which is connected to the heating tank and the heating device, and is used to transport the working medium from the heating tank to the heating device.

[0010] In some embodiments, the heating assembly further includes:

[0011] A first pipeline, which connects the heating tank and the first pump, and is used to transport the working medium from the heating tank to the first pump;

[0012] A second pipeline, which connects the first pump and the heating device, and is used to transport the working medium from the first pump to the heating device;

[0013] A third pipeline, which connects the heating device and the heat supplement tank, and is used to transport the working medium from the heating device to the heat supplement tank.

[0014] In some embodiments, a first control valve and a first filter are sequentially arranged on the first pipeline, and the first control valve is arranged on the side of the first filter away from the first pump;

[0015] The first control valve is used to control the on-off of the flow of the working medium from the heating tank to the first pump;

[0016] The first filter is used to filter the working medium flowing from the heating tank to the first pump.

[0017] In some embodiments, a first check valve, a second control valve, a first temperature monitor and a first flowmeter are sequentially arranged on the second pipeline; the first check valve is arranged on the side close to the first pump;

[0018] The first check valve is used to prevent the working medium from flowing back from the second pipeline to the first pump;

[0019] The second control valve is used to control the on-off of the flow of the working medium from the first pump to the heating device;

[0020] The first temperature monitor is used to monitor the temperature of the working medium flowing from the first pump to the heating device;

[0021] The first flowmeter is used to monitor the flow rate of the working medium flowing from the first pump to the heating device.

[0022] In some embodiments, at least one second temperature monitor and a third control valve are sequentially arranged on the third pipeline; the second temperature monitor is arranged on the side of the third control valve away from the heat supplement tank;

[0023] The second temperature monitor is used to monitor the temperature of the heat source flowing from the heating device to the heat supplement tank;

[0024] The third control valve is used to control the on-off of the heat source flowing from the heating device to the heat supplement tank.

[0025] In some embodiments, the storage assembly further includes:

[0026] A fourth pipeline, which connects the heating tank and the pressure tank, and is used to transport the heated liquefied petroleum gas from the heating tank to the pressure tank;

[0027] A fifth pipeline, which connects the pressure tank and the heating device, and is used to transport part of the gaseous liquefied petroleum gas from the pressure tank to the heating device.

[0028] In some embodiments, a fourth control valve, a second flowmeter, a pressure regulating valve, and a flow regulating valve are sequentially arranged on the fifth pipeline, and the fourth control valve is arranged on the side close to the pressure tank;

[0029] The fourth control valve is used to control the on-off of part of the gaseous liquefied petroleum gas flowing from the pressure tank to the heating device;

[0030] The second flowmeter is used to monitor the flow rate of part of the gaseous liquefied petroleum gas flowing from the pressure tank to the heating device;

[0031] The pressure regulating valve is used to regulate the pressure of part of the gaseous liquefied petroleum gas flowing from the pressure tank to the heating device;

[0032] The flow regulating valve is used to regulate the flow rate of part of the gaseous liquefied petroleum gas flowing from the pressure tank to the heating device.

[0033] In some embodiments, the fifth pipeline further includes at least one branch, the branch is connected to the heating device, and a fifth control valve and a flame arrester are sequentially arranged on the branch, and the flame arrester is arranged on the side close to the heating device;

[0034] The fifth control valve is used to control the on-off of part of the gaseous liquefied petroleum gas flowing from the branch to the heating device;

[0035] The flame arrester is used to prevent the flame from entering the pressure tank through the branch.

[0036] In some embodiments, the heating assembly further includes:

[0037] A condenser, which is connected to the heating tank and the heat supplement tank, and is used to receive and heat the working medium transported from the heating tank to form a heat source;

[0038] A sixth pipeline, which connects the condenser and the heat supplement tank, and is used to transport the heat source from the condenser to the heat supplement tank.

[0039] In some embodiments, the heating assembly further includes:

[0040] A second pump, which is connected to the heat supplement tank and the heating tank, and is used to transport the heat source from the heat supplement tank to the heating tank;

[0041] A seventh pipeline, which connects the second pump and the heating tank, and is used to transport the heat source from the second pump to the heating tank.

[0042] In some embodiments, the heating device includes:

[0043] A burner, which is connected to the pressure tank;

[0044] A water bath pool, the burner is arranged in the water bath pool, a heat exchange coil is arranged in the water bath pool, the heat exchange coil is connected to the heating tank and the heat supplement tank, the burner is used to heat the heat exchange coil, and the heat exchange coil is used to receive and heat the working medium transported from the heating tank.

[0045] In this application, gaseous liquefied petroleum gas is transported to the heating device as fuel. The gaseous liquefied petroleum gas burns in the heating device to generate heat. The heating device receives and heats the working medium to form a heat source, and transports the heat source to the heat supplement tank. The heat supplement tank transports the heat source to the heating tank to heat the liquefied petroleum gas to be heated, avoiding the compression of gaseous liquefied petroleum gas. At the same time, the heat generated by the combustion of gaseous liquefied petroleum gas can be used to heat the working medium to form a heat source, improving the energy utilization efficiency, reducing the equipment operation cost, and reducing the system's dependence on external heat sources. Description of the Drawings

[0046] In order to more clearly illustrate the technical solutions in this application, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0047] Figure 1 It is a flowchart of the liquefied petroleum gas heating and storage system provided by the embodiment of this application.

[0048] Figure 2 Schematic diagram of the first part of the liquefied petroleum gas heating storage system provided by the embodiment of the present application.

[0049] Figure 3 Schematic diagram of the second part of the liquefied petroleum gas heating storage system provided by the embodiment of the present application.

[0050] Figure 4 Schematic diagram of the third part of the liquefied petroleum gas heating storage system provided by the embodiment of the present application.

[0051] Figure 5 is Figure 4 Partial enlarged view of area A in

[0052] Figure 6 is Figure 4 Partial enlarged view of area B in

[0053] In the attached drawings, the components represented by each reference numeral are as follows:

[0054] 10. Heating assembly; 20. Storage assembly; 1. Heating tank; 2. Heat supplement tank; 3. Heating device; 31. Burner; 311. First combustion chamber; 312. Second combustion chamber; 32. Water bath; 321. Heat exchange coil; 322. Flue gas distributor; 33. Fan pipeline; 34. Circulation water pipeline; 35. Atomization water pipeline; 36. Smoke exhaust passage; 4. Pressure tank; 5. First pump; 6. Condenser; 7. Second pump; 8. Storage tank; 9. Third pump; 100. First pipeline; 101. First control valve; 102. First filter; 103. First drain port; 200. Second pipeline; 201. First check valve; 202. Second control valve; 203. First temperature monitor; 204. First flow meter; 205. Second drain port; 300. Third pipeline; 301. Second temperature monitor; 302. Third control valve; 303. Third drain port; 400. Fourth pipeline; 500. Fifth pipeline; 501. Fourth control valve; 502. Second flow meter; 503. Pressure regulating valve; 504. Flow regulating valve; 505. Fourth drain port; 510. Branch; 511. Fifth control valve; 512. Flame arrester; 600. Sixth pipeline; 700. Seventh pipeline; 800. Steam pipeline. Detailed implementation manners

[0055] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0056] It should be noted that the serial number terms such as [First], [Second], [Third], [Fourth], etc. mentioned in this application do not represent any order, quantity, or importance, but are only used to distinguish different parts. The directional terms such as [up], [down], [left], [right], etc. mentioned in this application are only for reference to the directions in the attached drawings. Therefore, the serial number terms, directional terms, and positional relationship terms used are for explaining and understanding this application, rather than for limiting this application. In the drawings, units with similar structures are denoted by the same reference numerals.

[0057] An embodiment of the present application provides a liquefied petroleum gas heating storage system, and the present application will be described in detail below in conjunction with specific embodiments.

[0058] As Figures 1-6 shown, a liquefied petroleum gas (LPG) heating storage system includes a heating component 10 and a storage component 20. The heating component 10 includes a heating tank 1, a heat supplement tank 2, and a heating device 3. The heat supplement tank 2 is connected to the heating tank 1, and the heating device 3 is connected to the heat supplement tank 2 and the heating tank 1. The heating tank 1 contains the liquefied petroleum gas to be heated, and the heat supplement tank 2 is used to convey a heat source to the heating tank 1; after the heat source exchanges heat with the liquefied petroleum gas to be heated, a working medium is formed, and the heating device 3 is used to receive and heat the working medium to form a heat source, and convey the heat source to the heat supplement tank 2; the storage component 20 is connected to the heating component 10, and the storage component 20 includes a pressure tank 4. The pressure tank 4 is connected to the heating tank 1 and the heating device 3. The pressure tank 4 is used to store the liquefied petroleum gas heated by the heating tank 1, and convey a part of the gaseous liquefied petroleum gas in the pressure tank 4 to the heating device 3.

[0059] It can be understood that in this application, the gaseous LPG is conveyed to the heating device 3 as fuel. The gaseous LPG burns in the heating device 3 to generate heat. The heating device 3 receives and heats the working medium to form a heat source (heated working medium), and conveys the heat source to the heat supplement tank 2. The heat supplement tank 2 conveys the heat source to the heating tank 1 to heat the LPG to be heated, avoiding the compression of the gaseous LPG. At the same time, the heat generated by the combustion of the gaseous LPG can be used to heat the working medium to form a heat source, realizing the indirect heating of the LPG to be heated, improving the energy utilization efficiency, reducing the equipment operation cost, and also reducing the system's dependence on external heat sources.

[0060] In some embodiments, the heating device 3 is selected from a submerged combustion heating device.

[0061] It can be understood that the submerged combustion heating device is convenient to start and stop, and can be turned on and off according to the actual requirements of the LPG low-temperature storage plant area; in addition, the submerged combustion heating device has no external leakage of flames, complete system control, perfect interlocks, and has high safety, and can meet the safety requirements of the LPG low-temperature storage plant area.

[0062] In some embodiments, the number of heating tanks 1 is at least one. Specifically, the number of heating tanks 1 can be one, two, three, etc. The number of heating tanks 1 can be set according to actual needs.

[0063] In some embodiments, the components of liquefied petroleum gas include propane.

[0064] In some embodiments, the working fluid includes water.

[0065] In some embodiments, the pressure tank 4 is selected from spherical pressure tanks.

[0066] In some embodiments, the heating assembly 10 further includes: a first pump 5, the first pump 5 is connected to the heating tank 1 and the heating device 3, and the first pump 5 is used to transport the working fluid from the heating tank 1 to the heating device 3.

[0067] It can be understood that the heat source (heated working fluid) exchanges heat with the LPG to be heated in the heating tank 1 and then the temperature decreases to form the working fluid. The working fluid can be recycled after heating. By providing the first pump 5 in this application, the working fluid is transported from the heating tank 1 to the heating device 3 for heating.

[0068] In some embodiments, the heating assembly 10 further includes a first pipeline 100, a second pipeline 200 and a third pipeline 300. The first pipeline 100 connects the heating tank 1 and the first pump 5, and the first pipeline 100 is used to transport the working fluid from the heating tank 1 to the first pump 5; the second pipeline 200 connects the first pump 5 and the heating device 3, and the second pipeline 200 is used to transport the working fluid from the first pump 5 to the heating device 3; the third pipeline 300 connects the heating device 3 and the heat supplement tank 2, and the third pipeline 300 is used to transport the heat source (heated working fluid) from the heating device 3 to the heat supplement tank 2.

[0069] It can be understood that in this application, by providing the first pipeline 100, the first pipeline 100 connects the heating tank 1 and the first pump 5, thereby realizing the transportation of the working fluid from the heating tank 1 to the first pump 5; by providing the second pipeline 200, the second pipeline 200 connects the first pump 5 and the heating device 3, thereby realizing the transportation of the working fluid from the first pump 5 to the heating device 3; by providing the third pipeline 300, the third pipeline 300 connects the heating device 3 and the heat supplement tank 2, thereby realizing the transportation of the heat source (heated working fluid) from the heating device 3 to the heat supplement tank 2.

[0070] In some embodiments, a first control valve 101 and a first filter 102 are sequentially provided on the first pipeline 100. The first control valve 101 is provided on the side of the first filter 102 away from the first pump 5; the first control valve 101 is used to control the on-off of the working fluid flowing from the heating tank 1 to the first pump 5; the first filter 102 is used to filter the working fluid flowing from the heating tank 1 to the first pump 5.

[0071] It can be understood that by sequentially arranging a first control valve 101 and a first filter 102 on the first pipeline 100, the first control valve 101 can control the on-off of the working medium in the first pipeline 100 flowing from the heating tank 1 to the first pump 5, and the first filter 102 can filter impurities in the working medium in the first pipeline 100 to ensure the normal operation of the first pump 5.

[0072] In some embodiments, a first drain port 103 is further provided on the first pipeline 100. The first drain port 103 is located between the first control valve 101 and the first filter 102, and the first drain port 103 is used to drain the working medium in the first pipeline 100.

[0073] In some embodiments, a first check valve 201, a second control valve 202, a first temperature monitor 203, and a first flow meter 204 are sequentially provided on the second pipeline 200; the first check valve 201 is arranged on the side close to the first pump 5; the first check valve 201 is used to prevent the working medium from flowing back from the second pipeline 200 to the first pump 5; the second control valve 202 is used to control the on-off of the working medium flowing from the first pump 5 to the heating device 3; the first temperature monitor 203 is used to monitor the temperature of the working medium flowing from the first pump 5 to the heating device 3; the first flow meter 204 is used to monitor the flow rate of the working medium flowing from the first pump 5 to the heating device 3.

[0074] It can be understood that by sequentially arranging a first check valve 201, a second control valve 202, a first temperature monitor 203, and a first flow meter 204 on the second pipeline 200, the first check valve 201 can prevent the working medium from flowing back from the second pipeline 200 into the first pump 5 and affecting the normal operation of the first pump 5. The second control valve 202 is used to control the on-off of the working medium in the second pipeline 200 flowing from the first pump 5 to the heating device 3. The first temperature monitor 203 can monitor the temperature of the working medium flowing from the first pump 5 to the heating device 3, and the first flow meter 204 can monitor the flow rate of the working medium flowing from the first pump 5 to the heating device 3.

[0075] In some embodiments, a second drain port 205 is provided on the second pipeline 200. The second drain port 205 is arranged between the second control valve 202 and the first temperature monitor 203, and the second drain port 205 is used to drain the working medium in the second pipeline 200.

[0076] In some embodiments, at least one second temperature monitor 301 and a third control valve 302 are sequentially provided on the third pipeline 300; the second temperature monitor 301 is arranged on the side of the third control valve 302 away from the heat supplement tank 2; the second temperature monitor 301 is used to monitor the temperature of the heat source flowing from the heating device 3 to the heat supplement tank 2; the third control valve 302 is used to control the on-off of the heat source flowing from the heating device 3 to the heat supplement tank 2.

[0077] It can be understood that by sequentially arranging at least one second temperature monitor 301 and a third control valve 302 on the third pipeline 300, the second temperature monitor 301 can monitor the temperature of the heat source flowing from the heating device 3 to the heat replenishing tank 2, and the third control valve 302 can control the on-off of the heat source flowing from the heating device 3 to the heat replenishing tank 2.

[0078] In some embodiments, a third drain port 303 is further provided on the third pipeline 300. The third drain port 303 is arranged at one end of the second temperature monitor 302 away from the third control valve 301, and the third drain port 303 is used to drain the heat source in the third pipeline 300.

[0079] In some embodiments, the storage assembly 20 further includes a fourth pipeline 400 and a fifth pipeline 500. The fourth pipeline 400 connects the heating tank 1 and the pressure tank 4, and the fourth pipeline 400 is used to transport the heated liquefied petroleum gas from the heating tank 1 to the pressure tank 4; the fifth pipeline 500 connects the pressure tank 4 and the heating device 3, and the fifth pipeline 500 is used to transport part of the gaseous liquefied petroleum gas from the pressure tank 4 to the heating device 3.

[0080] It can be understood that the fourth pipeline 400 connecting the heating tank 1 and the pressure tank 4 can realize the transportation of the heated LPG from the heating tank 1 to the pressure tank 4 for storage; the fifth pipeline 500 connecting the pressure tank 4 and the heating device 3 can realize the transportation of part of the gaseous LPG from the pressure tank 4 to the heating device 3.

[0081] In some embodiments, a fourth control valve 501, a second flowmeter 502, a pressure regulating valve 503, and a flow regulating valve 504 are sequentially arranged on the fifth pipeline 500. The fourth control valve 501 is arranged on the side close to the pressure tank 4; the fourth control valve 501 is used to control the on-off of part of the gaseous liquefied petroleum gas flowing from the pressure tank 4 to the heating device 3; the second flowmeter 502 is used to monitor the flow rate of part of the gaseous liquefied petroleum gas flowing from the pressure tank 4 to the heating device 3; the pressure regulating valve 503 is used to regulate the pressure of part of the gaseous liquefied petroleum gas flowing from the pressure tank 4 to the heating device 3; the flow regulating valve 504 is used to regulate the flow rate of part of the gaseous liquefied petroleum gas flowing from the pressure tank 4 to the heating device 3.

[0082] It can be understood that by sequentially arranging the fourth control valve 501, the second flowmeter 502, the pressure regulating valve 503, and the flow regulating valve 504 on the fifth pipeline 500, the fourth control valve 501 can control the on-off of the gaseous LPG flowing from the pressure tank 4 to the heating device 3; the second flowmeter 502 can monitor the flow rate of the gaseous LPG flowing from the pressure tank 4 to the heating device 3; the pressure regulating valve 503 can regulate the pressure of the gaseous LPG flowing from the pressure tank 4 to the heating device 3; the flow regulating valve 504 can regulate the flow rate of the gaseous LPG flowing from the pressure tank 4 to the heating device 3.

[0083] In some embodiments, a fourth drain port 505 is further provided on the fifth pipeline 500. The fourth drain port 505 is provided between the fourth control valve 501 and the second flowmeter 502. The fourth drain port 505 is used to drain the gaseous LPG in the fifth pipeline 500.

[0084] In some embodiments, the fifth pipeline 500 further includes at least one branch 510. The branch 510 is connected to the heating device 3. A fifth control valve 511 and a flame arrester 512 are sequentially provided on the branch 510. The flame arrester 512 is provided on the side close to the heating device 3. The fifth control valve 511 is used to control the on-off of the flow of part of the gaseous liquefied petroleum gas from the branch 510 to the heating device 3. The flame arrester 512 is used to prevent the flame from entering the pressure tank 4 through the branch 510.

[0085] It can be understood that the number of the branches 510 should match the heating device 3. By sequentially arranging the fifth control valve 511 and the flame arrester 512 on the branch 510, the fifth control valve 511 can control the on-off of the flow of gaseous LPG from the branch 510 to the heating device 3. The flame arrester 512 can prevent the flame from entering the pressure tank 4 through the branch 510.

[0086] In some embodiments, the heating assembly 10 further includes a condenser 6 and a sixth pipeline 600. The condenser 6 is connected to the heating tank 1 and the heat supplement tank 2. The condenser 6 is used to receive and heat the working medium transported from the heating tank 1 to form a heat source. The sixth pipeline 600 is connected to the condenser 6 and the heat supplement tank 2. The sixth pipeline 600 is used to transport the heat source from the condenser 6 to the heat supplement tank 2.

[0087] It can be understood that in this application, by providing the condenser 6, the condenser 6 connects the heating tank 1 and the heat supplement tank 2. The condenser 6 can heat the working medium transported from the heating tank 1 to the heat supplement tank 2 to form a heat source. By providing the sixth pipeline 600, the sixth pipeline 600 connects the condenser 6 and the heat supplement tank 2, realizing the transportation of the heat source from the condenser 6 to the heat supplement tank 2.

[0088] In some embodiments, the number of the condensers 6 is at least one. Specifically, the number of the condensers 6 can be 1, 2, 3, etc. The number of the condensers 6 can be set according to actual needs.

[0089] In some embodiments, the condenser 6 is selected from a compressor.

[0090] It can be understood that the gaseous LPG in the pressure tank 4 needs to be compressed by a compressor and then transported back to the pressure tank 4. The temperature of the compressor increases due to its work, which can be used to heat the working medium and at the same time can also realize the cooling of the compressor itself.

[0091] In some embodiments, the heating assembly 10 further includes a second pump 7 and a seventh pipeline 700. The second pump 7 is connected to the heat supplement tank 2 and the heating tank 1. The second pump 7 is configured to transport the heat source from the heat supplement tank 2 to the heating tank 1. The seventh pipeline 700 is connected to the second pump 7 and the heating tank 1. The seventh pipeline 700 is configured to transport the heat source from the second pump 7 to the heating tank 1.

[0092] It can be understood that in this application, by providing the second pump 7 which is connected to the heat supplement tank 2 and the heating tank 1, the second pump 7 can transport the heat source (heated working medium) from the heat supplement tank 2 to the heating tank 1. By providing the seventh pipeline 700 which connects the second pump 7 and the heating tank 1, the heat source can be transported from the second pump 7 to the heating tank 1.

[0093] In some embodiments, the number of the second pumps 7 is at least one. Specifically, the number of the second pumps 7 can be 1, 2, 3, etc. The number of the second pumps 7 can be set according to actual needs.

[0094] In some embodiments, the heating assembly 10 further includes a storage tank 8 and a third pump 9. The storage tank 8 stores low-temperature LPG. The third pump 9 is connected to the storage tank 8 and the heating tank 1. The third pump 9 is configured to transport the low-temperature LPG from the storage tank 8 to the heating tank 1.

[0095] It can be understood that the storage tank 8 stores low-temperature LPG. The third pump 9 is connected to the storage tank 8 and the heating tank 1, and can transport the low-temperature LPG from the storage tank 8 to the heating tank 1 for heating.

[0096] In some embodiments, the heating assembly 10 further includes: a steam pipeline 800. The steam pipeline 800 is connected to the heat supplement tank 2. Steam heats the working medium in the heat supplement tank 2 through the steam pipeline 800.

[0097] It can be understood that by providing the steam pipeline 800 and connecting it to the heat supplement tank 2, steam can heat the working medium in the heat supplement tank 2 through the steam pipeline 800, and at the same time, the flexible use of the steam pipeline 800 can also be achieved.

[0098] In some embodiments, the heating device 3 includes a burner 31 and a water bath 32. The burner 31 is connected to the pressure tank 4. The burner 31 is disposed in the water bath 32. A heat exchange coil 321 is provided in the water bath 32. The heat exchange coil 321 is connected to the heating tank 1 and the heat supplement tank 2. The burner 31 is configured to heat the heat exchange coil 321. The heat exchange coil 321 is configured to receive and heat the working medium transported from the heating tank 1.

[0099] It can be understood that in this application, by connecting the burner 31 to the pressure tank 4, the burner 31 burns a part of the gaseous LPG transported from the pressure tank 4 to generate high-temperature flue gas; the burner 31 is located in the water bath 32, and the high-temperature flue gas generated by the combustion of the burner 31 can heat the heat exchange medium in the water bath 32, and the heat exchange medium then heats the heat exchange coil 321. The heat exchange coil 321 is connected to the heating tank 1 and the supplementary heating tank 2. The working medium forms a heat source after being heated by the heating tank 1 through the heat exchange coil 321 and is then transported to the supplementary heating tank 2.

[0100] In some embodiments, the heating device 3 further includes: a flue gas distributor 322, which is located in the water bath 32 and on the side of the heat exchange coil 321 close to the bottom of the water bath 32.

[0101] It can be understood that the high-temperature flue gas generated by the burner 31 burning a part of the gaseous LPG transported from the pressure tank 4 is introduced into the water bath 32 through the flue gas distributor 322 to heat the heat exchange medium in the water bath 32, and the heat exchange medium then heats the heat exchange coil 321, thereby realizing the heating of the working medium located in the heat exchange coil 321.

[0102] In some embodiments, the heat exchange medium includes water.

[0103] In some embodiments, the burner 31 includes a first combustion chamber 311 and a second combustion chamber 312 connected to each other, and the first combustion chamber 311 is located above the second combustion chamber 312.

[0104] In some embodiments, two branches 510 are respectively connected to the first combustion chamber 311 and the second combustion chamber 312.

[0105] In some embodiments, the heating device 3 further includes: a fan pipeline 33, which is connected to the burner 31 and provides combustion-supporting gas for the burner 31.

[0106] It can be understood that by providing the fan pipeline 33 and connecting the fan pipeline 33 to the burner 31, the fan pipeline 33 can provide combustion-supporting air for the combustion of the burner 31.

[0107] In some embodiments, the heating device 3 further includes: a circulating water pipeline 34, which is connected to the burner 31 and the water bath 32 and provides circulating cooling water for the burner 31.

[0108] It can be understood that by providing the circulating water pipeline 34 and connecting the circulating water pipeline 34 to the burner 31 and the water bath 32, the circulating water pipeline 34 can provide circulating cooling water for the burner 31 to reduce the outer wall temperature of the burner 31, thereby protecting the burner 31 body.

[0109] In some embodiments, the heating device 3 further includes: an atomizing water pipeline 35, which is connected to the burner 31 and the water bath 32, and the atomizing water pipeline 35 supplies atomized water to the burner 31.

[0110] It can be understood that by providing the atomizing water pipeline 35, which is connected to the burner 31 and the water bath 32 and supplies atomized water to the burner 31, the generation of nitrogen oxides (NOx) can be inhibited.

[0111] In some embodiments, the heating device 3 further includes: a smoke exhaust passage 36, which is connected to the water bath 32, and the high-temperature flue gas generated by the combustion of the burner 31 is discharged through the smoke exhaust passage 36 after heating the heat exchange medium in the water bath 32.

[0112] It can be understood that by providing the smoke exhaust passage 36 and connecting it to the water bath 32, the high-temperature flue gas generated by the combustion of the burner 31 can be discharged through the smoke exhaust passage 36 after heating the heat exchange medium in the water bath 32.

[0113] Path of LPG: The LPG to be heated stored in the storage tank 8 is transported to the heating tank 1 by the third pump 9 for heating. After heating, the LPG is transported to the pressure tank 4 for storage by the fourth pipeline 400. Part of the LPG in the pressure tank 4 will exist in gaseous form above the pressure tank 4. Part of the gaseous LPG is transported to the burner 31 through the fifth pipeline 500. The burner 31 burns part of the gaseous LPG transported from the pressure tank 4 to generate high-temperature flue gas, and the high-temperature flue gas can heat the water in the water bath 32, thereby heating the heat exchange coil 321 in the water bath 32.

[0114] Paths of heat source and working medium: The working medium (heat source) heated in the heat supplement tank 2 is transported to the heating tank 1 through the second pump 7 and the seventh pipeline 700 to heat the LPG to be heated. After heating the LPG to be heated, the working medium (heat source) has a reduced temperature to form a working medium. Part of the working medium is heated by the condenser 6 to form a heat source and is transported to the heat supplement tank 2 through the sixth pipeline 600 to continue participating in the heating cycle. The remaining part of the working medium is transported to the heat exchange coil 321 through the first pipeline 100, the first pump 5, and the second pipeline 200 for heating. After heating, the working medium (heat source) is transported from the heat exchange coil 321 to the heat supplement tank 2 through the third pipeline 300 to continue participating in the heating cycle.

[0115] The operating cost of the liquefied petroleum gas heating and storage system provided by the present application will be described below, and the operating cost will be calculated by taking the heating device 3 (submerged combustion heating device) heating the working medium (water) from 10 °C to 25 °C as an example.

[0116] The comprehensive thermal efficiency of the submerged combustion heating device is about 98%, and the calorific value of pure propane gas is 101 MJ / Nm 3 , that is, when burning 100 Nm 3 of propane gas, the heat released by complete combustion and transferred to hot water is:

[0117] Q = 101 * 100 MJ * 98% = 9898 MJ

[0118] Traditional low-temperature LPG storage area heating uses saturated steam with a pressure of 1.5 MPaG. The steam cools down to hot water at 25°C under normal pressure. The enthalpy value of saturated steam at 1.5 MPaG is 2791.46 kJ / kg, and the enthalpy value of hot water at 25°C under normal pressure is 104.87 kJ / kg. The mass of steam required to release Q = 9898 MJ is:

[0119] M = 9898 / (2791.46 - 104.87) * 10 3 kg = 3.68 t

[0120] Calculated at 300 yuan per ton for the steam price, the reduced operating cost for the steam part is 3.68 * 300 yuan = 1105.27 yuan.

[0121] The designed gas consumption of the submerged combustion heating device is about 200 Nm 3 / h. The total steam cost saved after operating for 24 hours is

[0122] 2 * 1105.27 * 24 = 53052.78 yuan.

[0123] The power consumption of the submerged combustion heating device after operating for 24 hours is: 130 kw * 24 h = 3120 kW h. Calculated at 0.674 yuan per degree for industrial power supply, the electricity cost for the submerged heating equipment after operating for 24 hours is 2102.88 yuan.

[0124] The propane gas consumption of the submerged combustion heating device after operating for 24 hours is 200 * 24 Nm 3 = 4800 Nm 3 , the density of propane gas is 1.967 kg / Nm 3 , and the mass flow rate in 24 hours is 4800 * 1.967 kg = 9441.60 kg. When burning propane gas in the low-temperature LPG storage area, it is calculated at the cost price, about 3600 yuan per ton. The cost of consuming propane gas is 9441.60 * 3600 / 1000 yuan = 33989.76 yuan

[0125] In summary, the cost saved by the submerged combustion heating device after operating for 24 hours is:

[0126] 53052.78 - 2102.88 yuan - 33989.76 yuan = 16960.14 yuan.

[0127] The cost saved by the immersion heating device running continuously for 30 days is: 16960.14 * 30 yuan = 508804.2 yuan.

[0128] In summary, in this application, gaseous LPG is transported to the heating device 3. The gaseous LPG burns in the heating device 3 to generate heat. The heating device 3 receives and heats the working medium to form a heat source, and transports the heat source to the heat supplement tank 2. The heat supplement tank 2 transports the heat source to the heating tank 1 to heat the LPG to be heated, avoiding the compression of gaseous LPG. At the same time, the heat generated by the combustion of gaseous LPG can be used to heat the working medium to form a heat source, realizing the indirect heating of the LPG to be heated, improving the energy utilization efficiency, and reducing the equipment operation cost.

[0129] In summary, although the detailed description of the embodiments of this application is as above, the above embodiments are not intended to limit this application. Those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A liquefied petroleum gas heating storage system, characterized in that: include: A heating component (10), the heating component (10) comprising a heating tank (1), a supplementary heat tank (2) and a heating device (3), the supplementary heat tank (2) being connected to the heating tank (1), the heating device (3) being connected to the supplementary heat tank (2) and the heating tank (1), the heating tank (1) being provided with liquefied petroleum gas to be heated, the supplementary heat tank (2) being used to transport a heat source to the heating tank (1); the heat source and the liquefied petroleum gas to be heated are exchanged with each other to form a working fluid, the heating device (3) being used to receive and heat the working fluid to form the heat source, and transport the heat source to the supplementary heat tank (2); A storage component (20), the storage component (20) is connected to the heating component (10), the storage component (20) comprises a pressure tank (4), the pressure tank (4) is connected to the heating tank (1) and the heating device (3), the pressure tank (4) is used to store the liquefied petroleum gas heated by the heating tank (1), and to transport the partially gaseous liquefied petroleum gas in the pressure tank (4) to the heating device (3).

2. The liquefied petroleum gas heating storage system according to claim 1, characterized in that: The heating component (10) further comprises: A first pump (5), the first pump (5) is connected to the heating tank (1) and the heating device (3), and the first pump (5) is used to transport the working medium from the heating tank (1) to the heating device (3).

3. The liquefied petroleum gas heating storage system according to claim 2, characterized in that: The heating component (10) further comprises: a first pipeline (100), the first pipeline (100) connecting the heating tank (1) and the first pump (5), the first pipeline (100) being used to transport the working medium from the heating tank (1) to the first pump (5); a second pipeline (200), the second pipeline (200) connecting the first pump (5) and the heating device (3), the second pipeline (200) being used to transport the working medium from the first pump (5) to the heating device (3); A third pipeline (300), wherein the third pipeline (300) connects the heating device (3) and the supplementary heat tank (2), and the third pipeline (300) is used to transport the working medium from the heating device (3) to the supplementary heat tank (2).

4. The liquefied petroleum gas heating storage system according to claim 3, characterized in that: A first control valve (101) and a first filter (102) are sequentially arranged on the first pipeline (100), wherein the first control valve (101) is arranged on a side of the first filter (102) away from the first pump (5); The first control valve (101) is used to control the on / off flow of the working medium from the heating tank (1) to the first pump (5); The first filter (102) is used to filter the working medium flowing from the heating tank (1) to the first pump (5).

5. The liquefied petroleum gas heating storage system according to claim 3, characterized in that: The second pipeline (200) is provided with a first check valve (201), a second control valve (202), a first temperature monitor (203) and a first flow meter (204) in sequence; the first check valve (201) is provided on a side close to the first pump (5); The first check valve (201) is used to prevent the working medium from flowing back from the second pipeline (200) to the first pump (5); The second control valve (202) is used to control the on / off flow of the working medium from the first pump (5) to the heating device (3); The first temperature monitor (203) is used to monitor the temperature of the working medium flowing from the first pump (5) to the heating device (3); The first flow meter (204) is used to monitor the flow rate of the working medium flowing from the first pump (5) to the heating device (3).

6. The liquefied petroleum gas heating storage system according to claim 3, characterized in that: The third pipeline (300) is provided with at least one second temperature monitor (301) and a third control valve (302) in sequence; the second temperature monitor (301) is provided on a side of the third control valve (302) away from the supplementary heat tank (2); The second temperature monitor (301) is used to monitor the temperature of the heat source flowing from the heating device (3) to the heat supply tank (2); The third control valve (302) is used to control the on-off flow of the heat source from the heating device (3) to the heat supplement tank (2).

7. The liquefied petroleum gas heating storage system according to claim 1, characterized in that: The storage component (20) further comprises: a fourth pipeline (400), the fourth pipeline (400) connecting the heating tank (1) and the pressure tank (4), the fourth pipeline (400) being used to transport the heated liquefied petroleum gas from the heating tank (1) to the pressure tank (4); A fifth pipeline (500), the fifth pipeline (500) connecting the pressure tank (4) and the heating device (3), the fifth pipeline (500) being used to transport part of the gaseous liquefied petroleum gas from the pressure tank (4) to the heating device (3).

8. The liquefied petroleum gas heating storage system according to claim 7, characterized in that: The fifth pipeline (500) is provided with a fourth control valve (501), a second flow meter (502), a pressure regulating valve (503) and a flow regulating valve (504) in sequence, and the fourth control valve (501) is provided on a side close to the pressure tank (4); The fourth control valve (501) is used to control the on / off flow of the partially gaseous liquefied petroleum gas from the pressure tank (4) to the heating device (3); The second flow meter (502) is used to monitor the flow rate of the partially gaseous liquefied petroleum gas flowing from the pressure tank (4) to the heating device (3); The pressure regulating valve (503) is used to regulate the pressure of the partially gaseous liquefied petroleum gas flowing from the pressure tank (4) to the heating device (3); The flow regulating valve (504) is used to regulate the flow rate of the partially gaseous liquefied petroleum gas flowing from the pressure tank (4) to the heating device (3).

9. The liquefied petroleum gas heating storage system according to claim 7, characterized in that: The fifth pipeline (500) further comprises at least one branch (510), wherein the branch (510) is connected to the heating device (3), and a fifth control valve (511) and a flame arrester (512) are sequentially arranged on the branch (510), and the flame arrester (512) is arranged on a side close to the heating device (3); The fifth control valve (511) is used to control the on / off flow of part of the liquefied petroleum gas in a gaseous state from the branch line (510) to the heating device (3); The flame arrester (512) is used to prevent flame from entering the pressure tank (4) through the branch line (510).

10. The liquefied petroleum gas heating storage system according to claim 1, characterized in that: The heating component (10) further comprises: A condenser (6), the condenser (6) being connected to the heating tank (1) and the supplementary heat tank (2), the condenser (6) being used to receive and heat the working fluid transported from the heating tank (1) to form a heat source; A sixth pipeline (600), the sixth pipeline (600) connects the condenser (6) and the supplementary heat tank (2), and the sixth pipeline (600) is used to transport the heat source from the condenser (6) to the supplementary heat tank (2).

11. The liquefied petroleum gas heating storage system according to claim 1, characterized in that: The heating component (10) further comprises: a second pump (7), the second pump (7) being connected to the supplementary heat tank (2) and the heating tank (1), the second pump (7) being used for transporting the heat source from the supplementary heat tank (2) to the heating tank (1); A seventh pipeline (700), the seventh pipeline (700) connecting the second pump (7) and the heating tank (1), the seventh pipeline (700) being used to transport the heat source from the second pump (7) to the heating tank (1).

12. The liquefied petroleum gas heating storage system according to claim 1, characterized in that: The heating device (3) comprises: a burner (31), the burner (31) being connected to the pressure tank (4); A water bath (32), wherein the burner (31) is arranged in the water bath (32), a heat exchange coil (321) is arranged in the water bath (32), the heat exchange coil (321) is connected to the heating tank (1) and the supplementary heat tank (2), the burner (31) is used to heat the heat exchange coil (321), and the heat exchange coil (321) is used to receive and heat the working medium transported by the heating tank (1).

Images