Natural gas temperature and pressure regulating device and method driven by air source heat pump

Abstract

The invention discloses a natural gas temperature and pressure regulating device and method driven by an air source heat pump, and belongs to the technical field of natural gas temperature and pressure regulation. An integrated design is adopted, and an air source heat pump unit, an electric heater, a heating furnace body, a heat exchange coil, a throttling system, a liquid distribution system, an instrument system and an electric control system are installed on a base in a centralized mode; integration is high, multiple functions are achieved, the occupied area is small, and the on-site construction amount is small; air source heating is achieved through the air source heat pump unit, electric heating assistance is achieved through the electric heater, an original traditional fossil fuel consumption heating mode is replaced with the air source heating and electric heating assistance mode, carbon emission in the device operation process is reduced, the heat transfer efficiency of the system is improved, and meanwhile operation data are monitored through an instrument; and the electric control system analyzes and adjusts the data, so that automatic operation and unattended operation of the device are realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of natural gas temperature and pressure regulation, and in particular relates to a natural gas temperature and pressure regulation device and method driven by an air source heat pump. Background Art

[0002] Heating furnaces are widely used in many industries such as petroleum, chemical industry, metallurgy, machinery, heat treatment, surface treatment, building materials, electronics, materials, light industry, daily chemicals, and pharmaceuticals. They play an important role in industrial production. However, heating furnaces, various industrial furnaces, and boilers are all high-energy-consuming kilns with large resource consumption. They will cause environmental pollution to the environment while operating. The use of heating furnaces often results in carbon emissions and substandard thermal efficiency.

[0003] An air source heat pump is an energy-saving device that uses high-level energy to make heat flow from a low-level heat source to a high-level heat source. Air as the heat source of a heat pump has the advantages of energy saving, environmental protection, and high thermal efficiency. The desert hinterland has abundant air energy resources, which are extremely suitable for the application of air source heat pumps.

[0004] In view of the fact that some heating furnaces are currently located in the heart of the desert and have serious environmental pollution and high energy consumption, how to effectively combine air source heat pumps and electric heating throttling technology has become an urgent problem that needs to be solved. Summary of the invention

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a natural gas temperature and pressure regulating device and method driven by an air source heat pump, so as to solve the problems in the prior art that some heating furnaces are located in the heart of the desert and have great environmental pollution and high energy consumption.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A natural gas temperature and pressure regulating device driven by an air source heat pump comprises a base, a heating furnace body is arranged on the base, an electric heater is arranged on one side of the heating furnace body, and a heat exchange coil and a throttling system are connected to the other side, an instrument system is arranged on the throttling system, and the instrument system is electrically connected to an electric control system arranged on the front side of the heating furnace body, a liquid distribution system is arranged on the base on the rear side of the heating furnace body, and the liquid distribution system is connected to the heating furnace body, and an air source heat pump unit is also arranged on the base on the side of the heating furnace body where the electric heater is arranged, and the air source heat pump unit is connected to the heating furnace body.

[0008] Preferably, the air source heat pump unit comprises an air source heat pump unit and a condenser; the air source heat pump unit is fixed on a base and connected to the condenser, and the condenser is connected to the heating furnace body.

[0009] Preferably, an electric heater connecting flange and a condenser connecting flange are provided on one side of the heating furnace body and are respectively connected to the electric heater and the air source heat pump unit; a water seal tank and a manhole are provided at the upper end of the heating furnace body, and a first-level connecting manhole and a second-level connecting manhole are provided on the other side of the heating furnace body and are respectively connected to the heat exchange coil and the throttling system, a sewage pipeline is provided under the heating furnace body, and a liquid level monitoring device is also provided on the heating furnace body and is electrically connected to the electronic control system.

[0010] Preferably, the throttling system comprises:

[0011] A first-stage throttling inlet pipe, the end of which is connected to a first-stage connecting manhole of the heating furnace body;

[0012] A first-level throttling outlet pipe, one end of which is connected to the first-level connecting manhole of the heating furnace body, and the other end is connected to the first-level manual throttle valve; the first-level manual throttle valve is connected to the second-level throttling inlet pipe, and the end of the second-level throttling inlet pipe is connected to the second-level connecting manhole of the heating furnace body;

[0013] The secondary throttling outlet pipe has one end connected to the secondary connecting manhole and the other end connected to the secondary manual throttle valve. The secondary manual throttle valve is connected to the outlet pipe, and the outlet pipe is connected to the venting pipeline and the safety valve discharge pipeline respectively.

[0014] Preferably, the instrument system includes: a flat gate valve, a bimetallic thermometer, a temperature transmitter, a local pressure gauge, a pressure transmitter, a throttling stop vent valve and a safety valve;

[0015] A flat gate valve, a bimetallic thermometer and a temperature transmitter are provided on the first-stage throttling inlet pipe;

[0016] The first-stage throttling outlet pipe is provided with a bimetallic thermometer, a temperature transmitter and a local pressure gauge;

[0017] A bimetallic thermometer and a local pressure gauge are provided on the secondary throttling inlet pipe;

[0018] The outlet pipe is equipped with a bimetallic thermometer, a temperature transmitter, a local pressure gauge and a pressure transmitter;

[0019] A flat gate valve and a throttling cut-off vent valve are arranged on the vent pipeline, and a flat gate valve and a safety valve are arranged on the safety valve discharge pipeline in sequence.

[0020] Preferably, an on-site thermometer and a remote thermometer are also provided above the heating furnace body and are electrically connected to the electric control system.

[0021] Preferably, the electric control system includes a power regulating cabinet, a power control cabinet and a control system. The electric control system is connected to the ports on each instrument in the instrument system. The power regulating cabinet is arranged on the base to provide power and power distribution for the overall operation of the device; the power control cabinet is arranged on the base and is electrically connected to the instrument system, the electric heater and the air source heat pump unit for collecting measuring point data, displaying data, implementing control and uploading data.

[0022] Preferably, the liquid distribution system includes a centrifugal pump and a liquid distribution pipe. The centrifugal pump is arranged on a base on one side of the heating furnace body, the liquid distribution pipe is arranged in the heating furnace body, the inlet of the centrifugal pump is connected to the bottom of the heating furnace body, and the outlet is connected to the liquid distribution pipe.

[0023] The present invention also discloses a natural gas temperature and pressure regulating method driven by an air source heat pump, which is implemented by using any one of the natural gas temperature and pressure regulating devices driven by an air source heat pump, and specifically comprises the following steps:

[0024] Turn on the device to enter working state;

[0025] The air source heat pump unit in working state converts the low temperature heat source in the air into high temperature heat source to heat the medium in the heating furnace body, and the medium transfers the heat to the heat exchange coil;

[0026] The natural gas enters the heat exchange coil, is heated, and is throttled and depressurized in the throttling system before being output.

[0027] Preferably, when the pressure of the device is greater than a preset value, the electronic control system sends a signal to open the throttling system and / or the instrument system to release the pressure;

[0028] When the liquid level is lower than the preset value, the electronic control system sends out an alarm signal and controls the air source heat pump unit to stop working;

[0029] When the heat provided by the air source heat pump unit is less than the preset value, the electric heater is started for heating.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention adopts an integrated design, and the air source heat pump unit, electric heater, heating furnace body, heat exchange coil, throttling system, liquid distribution system, instrument system and electric control system are centrally installed on a base, which has high integration, multiple functions, small footprint and small on-site construction volume; the air source heat pump unit is adopted to realize air source heating, and the electric heater is adopted to realize electric heating assistance, and the air source heating + electric heating assistance mode replaces the original traditional fossil fuel consumption heating mode, which reduces carbon emissions during the operation of the device and increases the system heat transfer efficiency. At the same time, the operation data is monitored by the instrument, and the electric control system analyzes and adjusts the data to realize the automatic operation and unattended operation of the device. At the same time, the structure of the air source heat pump unit is optimized, and the air source heat pump unit and the heating furnace structure are fully combined. Using air source as energy fundamentally solves the problems of carbon emissions and substandard thermal efficiency faced by the current heating furnace. The device has a high degree of automation and can truly realize unattended operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a process flow chart of an embodiment of the present invention;

[0033] Figure 2 It is a front view of the device of the present invention;

[0034] Figure 3 It is a top view of the device of the present invention.

[0035] Among them: 1-base; 2-first-level throttling inlet pipe; 3-first-level manual throttling valve; 4-second-level throttling inlet pipe; 5-second-level manual throttling valve; 6-first-level connecting manhole; 7-second-level connecting manhole; 8-heating furnace body; 9-centrifugal pump; 10-drainage pipeline; 11-air source heat pump unit; 12-electric heater; 13-electric heater connection flange; 14-condenser; 15-condenser connection flange; 16-power adjustment cabinet; 17-power control cabinet; 18-water seal tank; 19-first-level heat exchange coil; 20-second-level heat exchange coil; 21-manhole; 22-first-level throttling outlet pipe; 23-outlet pipe; 24-second-level throttling outlet pipe; Ⅰ-natural gas pressure regulation module; Ⅱ-natural gas temperature control module. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0039] See also Figure 2 The present application discloses a natural gas temperature and pressure regulating device driven by an air source heat pump, characterized in that it includes a base 1, a heating furnace body 8 is arranged on the base 1, an electric heater 12 is arranged on one side of the heating furnace body 8, and a heat exchange coil and a throttling system are connected on the other side, an instrument system is arranged on the throttling system, and the instrument system is electrically connected to an electric control system arranged on the front side of the heating furnace body 8, a liquid distribution system is arranged on the base 1 on the rear side of the heating furnace body 8, and the liquid distribution system is connected to the heating furnace body 8, and an air source heat pump unit is also arranged on the base 1 on the side where the electric heater 12 is arranged on the heating furnace body 8, and it is connected to the heating furnace body 8. The integrated design is adopted to centrally install the air source heat pump unit, electric heater, heating furnace body, heat exchange coil, throttling system, liquid distribution system, instrument system and electronic control system on a base, which has high integration, multiple functions, small footprint and small on-site construction. The air source heat pump unit is used to realize air source heating, and the electric heater is used to realize electric heating assistance. The air source heating + electric heating assistance method replaces the original traditional fossil fuel heating method, which reduces carbon emissions during the operation of the device and increases the heat transfer efficiency of the system. At the same time, the instrument monitors the operation data, and the electronic control system analyzes and adjusts the data to realize the automatic operation and unattended operation of the device. At the same time, the structure of the air source heat pump unit is optimized to fully combine the air source heat pump unit and the heating furnace structure. Using air source as energy fundamentally solves the problems of carbon emissions and substandard thermal efficiency faced by the current heating furnace. The device has a high degree of automation and can truly achieve unattended operation.

[0040] The device adopts a skid-mounted structure, and is composed of an air source heat pump unit, an electric heater 12, a heating furnace body 8, a heat exchange coil, a throttling system, a liquid distribution system, an instrument system, an electronic control system, and a base 1. The device uses air energy and electric energy to assist in heating. By integrating the air source heat pump unit and the heating furnace structure, the process flow of the air source heat pump unit is simplified to make the entire device more integrated. The air source heat pump unit converts the low-temperature heat source in the air into high-temperature heat energy to heat the heat transfer medium in the heating furnace body. The heat transfer medium heats the natural gas (crude oil) flowing in the heat exchange coil through the heat exchange coil. At the same time, a throttling system is provided on one side of the heat exchange coil. The throttling system is provided with an instrument system to monitor the operating data of the natural gas (crude oil). The device is automatically adjusted through the electronic control system. When the heat provided by the heat pump cannot meet the operating requirements, the electric heater starts to assist the heat pump for heating. By using air as a thermal energy source to heat natural gas (crude oil), the consumption of fossil fuels is reduced. At the same time, the thermal efficiency of the heating furnace can reach 300% to 400%, which is 67% to 75% energy-saving than traditional heating furnaces, achieving a low-carbon, energy-saving and environmentally friendly production process, and promoting the transformation of oil and gas fields to green and low-carbon development oil and gas fields.

[0041] In some embodiments, a natural gas temperature and pressure regulating device driven by an air source heat pump includes a base 1, a heating furnace body 8 is arranged on the base 1, an electric heater 12 is arranged on one side of the heating furnace body 8, and a heat exchange coil and a throttling system are connected on the other side. An instrument system is arranged on the throttling system, and the instrument system is electrically connected to an electric control system arranged on the front side of the heating furnace body 8. A liquid distribution system is arranged on the base 1 on the rear side of the heating furnace body 8, and the liquid distribution system is connected to the heating furnace body 8. An air source heat pump unit is also arranged on the base 1 on the side where the electric heater 12 is arranged on the heating furnace body 8, and it is connected to the heating furnace body 8. The air source heat pump unit includes an air source heat pump unit 11 and a condenser 14; the air source heat pump unit 11 is fixed on the base 1 and connected to the condenser 14, and the condenser 14 is connected to the heating furnace body 8.

[0042] The present invention provides a natural gas temperature and pressure regulating device driven by an air source heat pump. The temperature and pressure regulating method is to utilize an air source heat pump unit to absorb low-temperature heat source in an air source and convert it into a high-temperature heat source to heat a heat transfer medium in a heating furnace body. The heat transfer medium heats the natural gas flowing in the heat exchange coil through a heat exchange coil. At the same time, a throttle valve is arranged on one side of the heat exchange coil to throttle and reduce the pressure of the natural gas, and finally the temperature and pressure required for gathering and transportation are reached. The device adopts a fully automatic control strategy, and electrical instruments are arranged on the throttling pipeline and the heating furnace. Data collected by the electrical instruments are uploaded to a control cabinet, so that the device can automatically adjust the operating parameters.

[0043] In some embodiments, a natural gas temperature and pressure regulating device driven by an air source heat pump mainly includes a base 1, an air source heat pump unit, an electric heater 12, a heating furnace body 8, a heat exchange coil, a throttling system, a liquid distribution system, an instrument system, and an electric control system. The electric heater 12 is installed on the heating furnace body 8, the heat exchange coil is installed in the heating furnace body 8, the throttling system is connected to the heat exchange coil, the air source heat pump unit is installed on the side of the heating furnace body where the electric heater is installed, and the liquid distribution system is installed on one side of the heating furnace body and fixedly installed on the base together with the electric control system, the instrument system, and the heating furnace body.

[0044] In some embodiments, see Figure 2 , Figure 3 The above-mentioned heating furnace body is fixedly installed in the middle position of the base, and the electric control system is fixedly installed on the left side of the base of the heating furnace body. The electric heater connection flange 13 and the condenser connection flange 15 are arranged horizontally side by side at the lower right of the heating furnace body 8, and the local temperature measuring port and the remote liquid level gauge port are arranged at the upper right of the heating furnace body 8. The upper end of the heating furnace body 8 is provided with a water seal tank 18 and a manhole 21. The upper left of the heating furnace body 8 is provided with a first-level connecting manhole 6 and a second-level connecting manhole 7 for connecting the heat exchange coil and the throttling system. The lower left of the heating furnace body 8 is provided with a sewage outlet. The heating furnace body 8 is provided with a liquid level monitoring device. The air source heat pump unit is installed on the side of the heating furnace body 8 where the electric heater 12 is installed and is installed together with the heating furnace body 8 on the base 1, and the liquid distribution system is installed on one side of the heating furnace body.

[0045] In some embodiments, see Figure 2 , Figure 3 The electric heater 12 is connected to the electric heater connecting flange arranged at the lower right side of the heating furnace body 8.

[0046] In some embodiments, see Figure 2 , Figure 3The throttling system and instrument system are throttling manifolds. A flat gate valve, a bimetallic thermometer and a temperature transmitter are arranged on the first-level throttling inlet pipe 2. The end of the first-level throttling inlet pipe 2 is connected to the first-level connecting manhole 6 of the heating furnace body 8. A bimetallic thermometer, a temperature transmitter, a local pressure gauge and a first-level manual throttling valve 3 are arranged on the first-level throttling outlet pipe 22. The first-level manual throttling valve 3 is connected to the second-level throttling inlet pipe 4. The second-level throttling inlet pipe 4 is provided with a bimetallic thermometer and a local pressure gauge. The end of the second-level throttling inlet pipe 4 is connected to the It is connected to the secondary connecting manhole 7 of the heating furnace body 8, and a secondary manual throttle valve 5 is arranged on the secondary throttling outlet pipe 4. The secondary manual throttle valve 5 is connected to the outlet pipe 23. The outlet pipe 23 is provided with a bimetallic thermometer, a temperature transmitter, a local pressure gauge, a pressure transmitter, a vent pipeline and a safety valve discharge pipeline. The vent pipeline is provided with a flat gate valve and a throttling stop vent valve. The safety valve discharge pipeline is provided with a flat gate valve and a safety valve in sequence. The vent pipeline and the safety valve discharge pipeline intersect on the discharge pipeline behind the safety valve.

[0047] In some embodiments, the air source heat pump unit includes an air source heat pump unit 11 and a condenser 14. The air source heat pump unit 11 is fixed on the base 1 and connected to the condenser 14, wherein the condenser 14 is connected to the condenser connection flange 15 arranged at the lower right corner of the heating furnace body 8.

[0048] In some embodiments, the electric control system includes a power regulating cabinet 16, a power control cabinet 17 and a control system, and the electric control system is connected to ports on each instrument in the instrument system.

[0049] In some embodiments, the liquid distribution system includes a centrifugal pump 9 and a liquid distribution pipe, wherein the centrifugal pump is arranged on one side of the heating furnace, and the liquid distribution pipe is arranged in the heating furnace body. The inlet of the centrifugal pump 9 is connected to the bottom of the heating furnace body 8, and the outlet is connected to the liquid distribution pipe.

[0050] The present invention also discloses a natural gas temperature and pressure regulating method driven by an air source heat pump, which specifically comprises the following steps:

[0051] Turn on the device to enter working state;

[0052] The air source heat pump unit in the working state converts the low-temperature heat source in the air into a high-temperature heat source to heat the medium in the heating furnace 8, and the medium transfers the heat to the heat exchange coil;

[0053] The natural gas enters the heat exchange coil, is heated, and is throttled and depressurized in the throttling system before being output.

[0054] In some embodiments, when the device is over-pressured, the electronic control system sends a signal to open the throttling system and / or the instrument system to release the pressure;

[0055] When the liquid level is insufficient, the electronic control system sends out an alarm signal and controls the air source heat pump unit to stop working;

[0056] When the heat provided by the air source heat pump unit cannot meet the heating requirement, the electric heater (12) is started for heating.

[0057] [Example]

[0058] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 2 The layout method is described, and the positional relationships such as front, back, top, bottom, left, and right are determined according to the layout direction of the accompanying drawings.

[0059] As attached Figure 1 , 2 As shown in Figure 3, the natural gas temperature and pressure regulating method and device driven by the air source heat pump includes a base 1, a heating furnace body 8, a natural gas pressure regulating module I, a natural gas temperature regulating module II, a power regulating cabinet 16, a power control cabinet 17, an air source heat pump unit 11, and a condenser 14. The natural gas pressure regulating module I, the natural gas temperature regulating module II and the condenser 14 are installed on the heating furnace body 8 and fixedly installed on the base 1 with the power regulating cabinet 16, the power control cabinet 17 and the air source heat pump unit 11. The gas from the wellhead of the Christmas tree is heat-exchanged through the natural gas pressure regulating module I and the natural gas temperature regulating module II to reach the required temperature and pressure for external transmission.

[0060] As attached Figure 3 The heating furnace body 8 is fixedly installed in the middle position of the base 1, the power adjustment cabinet 16 and the power control cabinet 17 are installed on the outer side of the right end of the base 1, and the air source heat pump unit 11 is installed on the right end of the base 1.

[0061] As attached Figure 2 , 3 An electric heater connecting flange 13 and a condenser connecting flange 15 are arranged at the lower right of the heating furnace body 8, an on-site thermometer and a remote thermometer are arranged at the upper right of the heating furnace body 8, a water seal tank 18 and a manhole 21 are arranged at the upper end of the heating furnace body 8, a first-level connecting manhole 6 and a second-level connecting manhole 7 are arranged at the upper left of the heating furnace body 8, a sewage pipeline 10 (a stop valve is arranged on the sewage pipeline) is arranged at the lower right of the heating furnace body 8, and a remote on-site liquid level meter is arranged on one side of the heating furnace body 8 and is electrically connected to the electronic control system.

[0062] As attached Figure 2 , 3The natural gas pressure regulating module I shown includes a primary throttling inlet pipe 2, a primary throttling outlet pipe 22, a primary manual throttling valve 3, a secondary throttling inlet pipe 4, an outlet and venting pipe 23, and a secondary manual throttling valve 5. The primary throttling inlet pipe 2 is connected to a primary connecting manhole 6 on the heating furnace body 8. The left end of the primary throttling outlet pipe 22 is connected to the primary connecting manhole 6 on the heating furnace body 8, and the right end is connected to the primary manual throttling valve 3. The rear end of the primary manual throttling valve 3 is connected to the secondary throttling inlet pipe 4. The other end of the secondary throttling inlet pipe 4 is connected to the heating furnace body 8. The upper secondary connecting manhole 7 is connected, the left end of the secondary throttling outlet pipe 24 is connected to the secondary connecting manhole 7 on the heating furnace body 8, and the right end is connected to the secondary manual throttle valve 5. The rear end of the secondary manual throttle valve 5 is connected to the natural gas outlet and the vent pipe 23. The natural gas outlet and the vent pipe 23 are provided with a safety valve discharge pipeline, a vent pipeline and an export pipeline. The safety valve discharge pipeline is sequentially provided with a flat gate valve and a safety valve. The vent pipeline is sequentially provided with a flat gate valve and a vent stop valve. The vent pipeline and the safety valve discharge pipeline are connected in parallel and finally converge into the vent pipe.

[0063] As attached Figure 2 , 3 The natural gas temperature control module II shown includes a heating furnace body 8, an electric heater 12, a primary heat exchange coil 19, a secondary heat exchange coil 20, a condenser 14 and a centrifugal pump 9. The electric heater 12 is connected to the electric heater connecting flange 13 on the heating furnace body 8, the condenser 14 is connected to the condenser connecting flange 15 on the heating furnace body 8, the primary heat exchange coil 19 and the secondary heat exchange coil 20 are respectively connected to the primary connecting manhole 6 and the secondary connecting manhole 7 on the heating furnace body 8, the inlet of the centrifugal pump 9 is connected to the bottom of the heating furnace body 8, and the outlet is connected to the top of the heating furnace body 8. A liquid distribution pipe is designed on the top (the liquid distribution pipe is a seamless steel pipe with several holes opened in the axial direction), and the liquid distribution pipe uses high wetting rate atomization technology to improve the heat transfer coefficient of the heat exchange coil and thus improve the heat exchange efficiency.

[0064] As attached Figure 3 The device shown includes a power regulating cabinet 16 and a power control cabinet 17. The power regulating cabinet provides power and power distribution for the operation of the device. The power control cabinet is connected to the ports on the set instruments, electric heater 12 and condenser to collect measuring point data, display data, implement control and upload data.

[0065] Specific use process: turn on the power switch on the power regulating cabinet, the device enters the working state, the air source heat pump unit 11 converts the low-temperature heat source in the air into a high-temperature heat source and transmits it to the condenser 14, the condenser 14 heats the medium in the heating furnace, and the medium transmits the heat to the heat exchange coil. The natural gas connected from the gas tree enters the primary heat exchange coil 19 for heating, and a primary manual throttle valve 3 is set at the outlet of the primary heat exchange coil 19 to throttle and reduce the pressure of the heated natural gas. The natural gas after primary throttling enters the secondary heat exchange coil 20 for heating, and a secondary manual throttle valve 5 is set at the outlet of the secondary heat exchange coil 20 to throttle and reduce the pressure of the heated natural gas for a second time, and the natural gas after two-stage throttling is transported out. When the system pressure is too high, the power control cabinet sends a signal to open the vent line or the safety valve discharge line or both to release the pressure. When the liquid level is insufficient, the liquid level alarm on the power control cabinet sends an alarm signal and controls the condenser to stop working to ensure the safety of the device. The electric heater is used as an auxiliary heating source. When the heat provided by the condenser cannot meet the heating requirements of the system, the electric heater is started for heating.

[0066] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A natural gas temperature and pressure regulating device driven by an air source heat pump, characterized in that: The invention comprises a base (1), a heating furnace body (8) is arranged on the base (1), an electric heater (12) is arranged on one side of the heating furnace body (8), and a heat exchange coil and a throttling system are connected to the other side, an instrument system is arranged on the throttling system, and the instrument system is electrically connected to an electric control system arranged on the front side of the heating furnace body (8), a liquid distribution system is arranged on the base (1) on the rear side of the heating furnace body (8), and the liquid distribution system is connected to the heating furnace body (8), and an air source heat pump unit is also arranged on the base (1) on the side of the heating furnace body (8) on which the electric heater (12) is arranged, and the air source heat pump unit is connected to the heating furnace body (8).

2. The natural gas temperature and pressure regulating device driven by an air source heat pump according to claim 1, characterized in that: The air source heat pump unit comprises an air source heat pump unit (11) and a condenser (14); the air source heat pump unit (11) is fixed on a base (1) and connected to the condenser (14), and the condenser (14) is connected to a heating furnace body (8).

3. The natural gas temperature and pressure regulating device driven by an air source heat pump according to claim 1, characterized in that: An electric heater connecting flange (13) and a condenser connecting flange (15) are provided on one side of the heating furnace body (8) and are respectively connected to the electric heater (12) and the air source heat pump unit; a water seal tank (18) and a manhole (21) are provided on the upper end of the heating furnace body (8); a first-level connecting manhole (6) and a second-level connecting manhole (7) are provided on the other side of the heating furnace body (8) and are respectively connected to the heat exchange coil and the throttling system; a sewage pipeline (10) is provided below the heating furnace body (8); and a liquid level monitoring device is also provided on the heating furnace body (8) and is electrically connected to the electric control system.

4. The natural gas temperature and pressure regulating device driven by an air source heat pump according to claim 3, characterized in that: The throttling system comprises: A primary throttling inlet pipe (2), the end of which is connected to a primary connecting manhole (6) of the heating furnace body (8); A primary throttling outlet pipe (22) has one end connected to a primary connecting manhole (6) of the heating furnace body (8), and the other end connected to a primary manual throttling valve (3); the primary manual throttling valve (3) is connected to a secondary throttling inlet pipe (4), and the end of the secondary throttling inlet pipe (4) is connected to the secondary connecting manhole (7) of the heating furnace body (8); The secondary throttling outlet pipe (4) has one end connected to the secondary connecting manhole (7) and the other end connected to the secondary manual throttling valve (5). The secondary manual throttling valve (5) is connected to the outlet pipe (23) at the rear, and the outlet pipe (23) is connected to the venting pipeline and the safety valve discharge pipeline respectively.

5. The natural gas temperature and pressure regulating device driven by an air source heat pump according to claim 4, characterized in that: The instrument system includes: a flat gate valve, a bimetallic thermometer, a temperature transmitter, a local pressure gauge, a pressure transmitter, a throttling stop vent valve and a safety valve; A flat gate valve, a bimetallic thermometer and a temperature transmitter are arranged on the first-stage throttling inlet pipe (2); A bimetallic thermometer, a temperature transmitter and a local pressure gauge are arranged on the first-stage throttling outlet pipe (22); A bimetallic thermometer and a local pressure gauge are provided on the secondary throttling inlet pipe (4); The outlet pipe (23) is provided with a bimetallic thermometer, a temperature transmitter, a local pressure gauge and a pressure transmitter; A flat gate valve and a throttling cut-off vent valve are arranged on the vent pipeline, and a flat gate valve and a safety valve are arranged on the safety valve discharge pipeline in sequence.

6. The natural gas temperature and pressure regulating device driven by an air source heat pump according to claim 3, characterized in that: An on-site thermometer and a remote thermometer are also provided above the heating furnace body (8) and are electrically connected to the electric control system.

7. The natural gas temperature and pressure regulating device driven by an air source heat pump according to claim 1, characterized in that: The electric control system comprises a power regulating cabinet (16), a power control cabinet (17) and a control system. The electric control system is connected to ports on each instrument in the instrument system. The power regulating cabinet (16) is arranged on the base (1) to provide power and power distribution for the overall operation of the device. The power control cabinet (17) is arranged on the base (1) and is electrically connected to the instrument system, the electric heater (12) and the air source heat pump unit unit to collect measurement point data, display data, implement control and upload data.

8. The natural gas temperature and pressure regulating device driven by an air source heat pump according to claim 1, characterized in that: The liquid distribution system comprises a centrifugal pump (9) and a liquid distribution pipe. The centrifugal pump (9) is arranged on a base (1) and located on one side of a heating furnace body (8). The liquid distribution pipe is arranged inside the heating furnace body (8). The inlet of the centrifugal pump (9) is connected to the bottom of the heating furnace body (8), and the outlet is connected to the liquid distribution pipe.

9. A method for regulating temperature and pressure of natural gas driven by an air source heat pump, characterized in that: The method is implemented by using the natural gas temperature and pressure regulating device driven by the air source heat pump according to any one of claims 1 to 8, and specifically comprises the following steps: Turn on the device to enter working state; The air source heat pump unit in the working state converts the low-temperature heat source in the air into a high-temperature heat source to heat the medium in the heating furnace (8), and the medium transfers the heat to the heat exchange coil; The natural gas enters the heat exchange coil, is heated, and is throttled and depressurized in the throttling system before being output.

10. The method for regulating temperature and pressure of natural gas driven by an air source heat pump according to claim 9, characterized in that: When the device pressure is greater than the preset value, the electronic control system sends a signal to open the throttling system and / or instrument system to release the pressure; When the liquid level is lower than the preset value, the electronic control system sends out an alarm signal and controls the air source heat pump unit to stop working; When the heat provided by the air source heat pump unit is less than a preset value, the electric heater (12) is started for heating.

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