CN205690713U - A kind of solar energy LNG gasification system - Google Patents

Abstract

The utility model discloses a solar LNG gasification system, which comprises a solar heat collector, a hot water storage tank, an auxiliary heater, a temperature controller, a gasifier, a buffer heat exchanger, an inlet of the hot water storage tank and a solar collector. The heater is connected, the first outlet of the hot water storage tank is connected to the first inlet of the buffer water tank, the second outlet of the hot water storage tank is connected to the water inlet of the vaporizer, the water outlet of the vaporizer is connected to the second inlet of the buffer water tank, and the buffer The outlet of the water tank is connected with the solar collector. The hot water heated in the solar collector flows into the hot water storage tank for storage. During gasification, the hot water enters the gasifier from the hot water storage tank to gasify the LNG, and the gasified natural gas is output from the NG delivery pipe to Natural gas supply pipeline network, and the system takes into account the use of LNG preheating and thermostat. The utility model applies the solar energy utilization technology to the field of LNG gasification, avoids the problem of cold pollution caused by the gasifier with traditional seawater as the heat source, and is energy-saving, environment-friendly and investment-saving.

Description

A solar LNG gasification system

technical field

The utility model belongs to the technical fields of solar energy utilization and LNG gasification, and in particular relates to a solar LNG gasification system.

Background technique

With its clean and efficient performance and wide application fields, natural gas has become one of the main energy sources at present, and the human demand for natural gas is increasing day by day. With the gradual adjustment of energy structure in my country, the import, production and application of LNG have developed rapidly, and a large number of LNG receiving stations have been built in my country. However, LNG must be gasified before it can be used. Since most receiving stations are located on the coast, seawater is usually used as a medium to heat and gasify LNG. However, the discharge of cold energy will cause abnormal seawater temperature, which is harmful to the marine ecological environment and marine transportation. cause adverse effects.

As a renewable new energy source, solar energy has the advantages of cleanness, environmental protection, abundant reserves, and long-term economy, and has been increasingly widely used. At present, solar energy is mainly used in solar water heaters, solar buildings, solar power generation, solar drying, solar refrigeration and other fields. If solar energy technology is applied to the field of LNG gasification, it will not only save energy and protect the environment, but also save investment and have good social and economic benefits.

Utility model content

The purpose of this utility model is to design a solar LNG gasification system, which uses solar energy to produce hot water, and uses the hot water as a heat source for LNG gasification, which has the advantages of energy saving, environmental protection and resource saving.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions to realize:

A solar LNG gasification system includes a solar heat collector, a water storage tank, an auxiliary heater, a temperature controller, a gasifier, and a buffer heat exchanger.

The hot water storage tank is provided with an inlet of the hot water storage tank, a first outlet of the hot water storage tank and a second outlet of the hot water storage tank. The first filter is connected to the solar heat collector, the first outlet of the hot water storage tank is connected to the buffer water tank through the first return pipe, and the second outlet of the hot water storage tank passes through the temperature controller in turn through the third water pipe , Auxiliary heater, hot water regulating valve are connected with vaporizer.

The gasifier is provided with a gasifier water inlet, a gasifier water outlet, a gasifier LNG inlet, and a gasifier NG outlet, and the gasifier water inlet is connected to the second outlet of the heat storage tank, so The water outlet of the gasifier passes through the buffer heat exchanger, the second filter, the circulation pump, and is connected with the buffer water tank through the third return pipe, the LNG inlet of the gasifier is connected with the LNG input pipe, and the gasifier The NG outlet is connected to the NG delivery pipe and then connected to the natural gas delivery pipeline network.

The buffer water tank is provided with a first inlet of the buffer water tank, a second inlet of the buffer water tank, and an outlet of the buffer water tank. The first inlet of the buffer water tank is connected to the first outlet of the heat storage tank. The second inlet is connected to the water outlet of the buffer heat exchanger, and the outlet of the buffer water tank is connected to the solar heat collector through the second return pipe and the first water pipe.

The first water pipe is provided with an incoming water pipe, and the incoming water pipe is provided with an incoming water regulating valve.

Described auxiliary heater is preferably electric heater, gas heater, and whether auxiliary heater works is controlled by electric valve by thermostat.

The solar heat collector is preferably a flat plate heat collector or a vacuum tube heat collector, the buffer water tank and the heat storage tank are preferably pressure-bearing heat preservation water tanks, and the gasifier is preferably a circulating hot water bath type gasifier, The buffer heat exchanger is preferably a straight tube heat exchanger, a serpentine tube heat exchanger or a coiled tube heat exchanger.

The temperature of the hot water stored in the hot water storage tank is within a certain range. When the water temperature in the hot water storage tank is heated to 65°C, the water pump is turned off; when the temperature in the hot water storage tank drops to 40°C, the water pump is turned on to avoid the water pump invalid operation.

The thermostat is used to control the auxiliary heater. If the temperature of the hot water is not less than the set temperature, the first electric valve is opened, and the auxiliary heater does not work; if the temperature is lower than the set temperature, the second electric valve is opened to control the auxiliary heater. Working heating hot water, the set temperature is preferably 50°C.

The second water pipe is provided with a check valve, and the first water pipe, the second water pipe, the third water pipe, the first return pipe, the second return pipe, the third return pipe, the LNG delivery pipe and the NG delivery pipe are all provided with control valve, the third water pipe is provided with a hot water regulating valve, and the NG delivery pipe is provided with an NG regulating valve.

Compared with the prior art, the utility model has the following advantages and effects:

Applying solar energy utilization technology to the field of LNG gasification, using hot water heated by solar energy as a heat source, avoids the problem of cold pollution caused by gasifiers with traditional seawater as a heat source, and is energy-saving, environmentally friendly, and investment-saving, which has positive social and economic benefits. benefit.

A buffer heat exchanger is set up to preheat LNG to make full use of the waste heat from the hot water flowing out of the gasifier, and to control the opening and closing of the hot water circulation pump according to the water temperature in the hot water storage tank, so as to avoid waste of resources. Using solar energy to complete the gasification of LNG increases the application channels of solar energy and provides a new idea for LNG gasification.

Description of drawings

Fig. 1 is a structural schematic diagram of a solar LNG gasification system of the present invention.

In the figure, 1. solar heat collector, 2. first filter, 3. water pump, 4. check valve, 5. heat storage tank, 6. buffer water tank, 7. incoming water regulating valve, 8. second 1. Electric valve, 9. Thermostat, 10. Second electric valve, 11. Auxiliary heater, 12. Hot water regulating valve, 13. Vaporizer, 14. Buffer heat exchanger, 15. Second filter, 16. Circulation pump, 17. Incoming water pipe, 18. First water pipe, 19. Second water pipe, 20. Inlet of hot water storage tank, 21. First outlet of hot water storage tank, 22. First return pipe, 23. Buffer The first inlet of the water tank, 24. The outlet of the buffer water tank, 25. The second return pipe, 26. The second outlet of the hot water storage tank, 27. The third water pipe, 28. The water inlet of the gasifier, 29. The water of the gasifier Outlet, 30. Water inlet of buffer heat exchanger, 31. Water outlet of buffer heat exchanger, 32. Third return pipe, 33. Second inlet of buffer water tank, 34. LNG delivery pipe, 35. LNG inlet of buffer heat exchanger , 36. LNG outlet of buffer heat exchanger, 37. LNG inlet of gasifier, 38. NG outlet of gasifier, 39.NG delivery pipe, 40.NG regulating valve.

detailed description

The utility model will be described in detail below in conjunction with specific embodiments.

The utility model provides a solar LNG gasification system, as shown in Figure 1, comprising a solar heat collector 1, a water storage tank 5, an auxiliary heater 11, a temperature controller 9, a gasifier 13, and a buffer heat exchanger 14.

The hot water storage tank 5 is provided with a hot water storage tank inlet 20, a first outlet 21 of the hot water storage tank and a second outlet 26 of the hot water storage tank. The return valve 4, the water pump 3, and the first filter 2 are connected to the solar heat collector 1, and the first outlet 21 of the heat storage tank 5 is connected to the buffer water tank 6 through the first return pipe 22. The second outlet 26 of the tank is connected to the vaporizer 13 through the third water pipe 27 through the temperature controller 9 , the auxiliary heater 11 , and the hot water regulating valve 12 in sequence.

The gasifier 13 is provided with a gasifier water inlet 28, a gasifier water outlet 29, a gasifier LNG inlet 37, and a gasifier NG outlet 38. The two outlets 26 are connected, and the gasifier water outlet 29 passes through the buffer heat exchanger 14, the second filter 15, the circulation pump 16 successively through the third return pipe 32, and is connected with the buffer water tank 6, and the gasifier LNG The inlet 37 is connected to the LNG input pipe 34, and the gasifier NG outlet 38 is connected to the NG delivery pipe 39 and further connected to the natural gas delivery pipeline network.

The buffer water tank 6 is provided with a first inlet 23 of the buffer water tank, a second inlet 33 of the buffer water tank, and an outlet 24 of the buffer water tank, and the first inlet 23 of the buffer water tank is connected with the first outlet 21 of the heat storage tank, The second inlet 33 of the buffer water tank is connected to the water outlet 31 of the buffer heat exchanger, and the outlet 24 of the buffer water tank is connected to the solar heat collector 1 through the second return pipe 25 and the first water pipe 18 .

The first water pipe 18 is provided with an incoming water pipe 17 , and the incoming water pipe 17 is provided with an incoming water regulating valve 7 .

The first electric valve 8 and the second electric valve 10 of the thermostat 9 are respectively connected to the third water pipe 27 .

The second water pipe 19 is provided with a check valve 4 , the third water pipe 27 is provided with a hot water regulating valve 12 , and the NG delivery pipe 39 is provided with an NG regulating valve 40 .

The NG delivery pipe 39 is connected to the natural gas pipeline network.

The principle of this device is: the hot water heated in the solar heat collector 1 flows into the hot water storage tank 5 through the second water pipe 19 through the first filter 2, the water pump 3, and the check valve 4 for storage. When the temperature is lower than the set temperature, under the action of the water pump 3, the hot water will flow into the buffer water tank 6 through the first return pipe 22 and flow back to the solar collector 1 through the second return pipe 25 and the first water pipe 18 for heating. To keep the hot water in the hot water tank 5 to keep a higher temperature. During gasification, hot water enters the gasifier 13 from the second outlet 26 of the hot water storage tank through the third water pipe 27 to gasify the LNG that has been preheated in the buffer heat exchanger 14, and the gasified natural gas flows from the NG The delivery pipe 39 is output to the natural gas supply pipe network, and the cooled hot water flows into the buffer water tank 6 through the buffer heat exchanger 14 , the second filter 15 , and the circulation pump 16 through the third return pipe 32 in sequence.

The water inlet pipe 17 is used to replenish the water consumed by the device, and the buffer heat exchanger 14 utilizes the residual temperature of the water flowing out from the gasifier 13 to preheat the LNG.

The temperature controller 9 is used to detect the temperature of the water flowing out of the hot water storage tank and control the opening and closing of the auxiliary heater 11. If the temperature of the hot water is not less than the set temperature, the first electric valve 8 is opened, and the auxiliary heater 11 does not work. ; If the temperature is lower than the set temperature, open the second electric valve 10 to control the auxiliary heater 11 to work and heat the hot water.

The above embodiments of the utility model have been described in detail in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments, and various changes can be made within the scope of knowledge of those skilled in the art.

Claims (7)

1. a solar energy LNG gasification system, is characterized in that, comprises solar heat collector (1), storage water tank (5), auxiliary heater (11), thermostat (9), vaporizer (13 ), buffer heat exchanger (14); The hot water storage tank (5) is provided with a hot water storage tank inlet (20), a first hot water storage tank outlet (21) and a second hot water storage tank outlet (26), and the hot water storage tank inlet ( 20) Connect the solar heat collector (1) through the second water pipe (19) through the check valve (4), the water pump (3), and the first filter (2) in sequence, and the heat storage tank (5) The first outlet (21) is connected to the buffer water tank (6) through the first return pipe (22), and the second outlet (26) of the heat storage tank passes through the temperature controller (9) sequentially through the third water pipe (27) , the auxiliary heater (11), the hot water regulating valve (12) are connected with the vaporizer (13); The gasifier (13) is provided with a gasifier water inlet (28), a gasifier water outlet (29), a gasifier LNG inlet (37), and a gasifier NG outlet (38). The gasifier water inlet (28) is connected to the second outlet (26) of the heat storage tank, and the vaporizer water outlet (29) passes through the buffer heat exchanger (14) and the second filter through the third return pipe (32) successively. Device (15), circulation pump (16), are connected with buffer water tank (6), described gasifier LNG inlet (37) is connected with LNG input pipe (34), described gasifier NG outlet (38) is connected with The NG delivery pipe (39) is connected and then connected with the natural gas delivery pipeline network; Described buffer water tank (6) is provided with buffer water tank first inlet (23), buffer water tank second inlet (33), buffer water tank outlet (24), described buffer water tank first inlet (23) and The first outlet (21) of the hot water storage tank is connected, the second inlet (33) of the buffer water tank is connected with the water outlet (31) of the buffer heat exchanger, and the outlet (24) of the buffer water tank passes through the second return pipe ( 25) Connect with the first water pipe (18) and the solar heat collector (1); The first water pipe (18) is provided with an incoming water pipe (17), and the incoming water pipe (17) is provided with an incoming water regulating valve (7); The first electric valve (8) and the second electric valve (10) of the thermostat (9) are respectively connected to the third water pipe (27); The second water pipe (19) is provided with a check valve (4), the third water pipe (27) is provided with a hot water regulating valve (12), and the NG delivery pipe (39) is provided with an NG regulating valve (40 ). 2. A solar LNG gasification system according to claim 1, characterized in that, the solar heat collector (1) is a flat plate heat collector or a vacuum tube heat collector. 3 . A solar LNG gasification system according to claim 1 , characterized in that, the hot water storage tank ( 5 ) is a pressure-bearing thermal insulation water tank. 4 . 4. A solar LNG gasification system according to claim 1, characterized in that the gasifier (13) is a circulating hot water bath type gasifier. 5. A kind of solar LNG gasification system according to claim 1, characterized in that the buffer heat exchanger (14) is a straight tube heat exchanger, serpentine tube heat exchanger or coil heat exchanger can be. 6. A kind of solar energy LNG gasification system according to claim 1, is characterized in that, described auxiliary heater (11) is electric heater or gas heater, whether auxiliary heater (11) works is determined by thermostat (9) Controlled by electric valve. 7. A solar LNG gasification system according to claim 6, characterized in that the temperature controller controls the first electric valve (8) and the second electric valve (10).