CN112050015A

CN112050015A - Natural gas pressure regulating back heat exchange heating device

Info

Publication number: CN112050015A
Application number: CN202011000094.4A
Authority: CN
Inventors: 孙海均
Original assignee: China Resources Nanjing Municipal Design Co Ltd
Current assignee: China Resources Nanjing Municipal Design Co Ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2020-12-08

Abstract

The invention discloses a natural gas pressure-regulated heat exchange warming device which comprises an inlet connecting pipe, an inlet pressure gauge, a ball valve, a needle valve, a filter, a gas stop valve, a primary pressure regulator, a safety valve, a heat exchanger, a secondary pressure regulator, an outlet pressure gauge, an outlet connecting pipe and a drain pipe, wherein all the parts are communicated through pipelines. The high-efficiency fin air-temperature heat exchanger is adopted to exchange heat with air after the pressure of the natural gas is regulated each time, the operation is simple, and no additional heat exchange facility is required to be established.

Description

Natural gas pressure regulating back heat exchange heating device

Technical Field

The invention relates to the technical field of natural gas pressure regulation, in particular to a natural gas pressure-regulated heat exchange and temperature rise device.

Background

The temperature of the high-pressure natural gas is reduced by about 0.5 ℃ when the pressure of the high-pressure natural gas is reduced by 0.1MPa on average in the pressure reduction process. In winter, the environmental temperature is reduced to below 0 ℃, at this time, although underground pipelines are buried below a freezing line, the temperature of the incoming gas is still possibly lower than 0 ℃ or close to 0 ℃, for example, the pressure is reduced from 4.0MPa design pressure to 0.4MPa design pressure, the temperature can be reduced to-15 ℃ at the lowest, at this time, frost is formed on the surfaces of pipelines and valves at the outlet of the equipment, and the phenomena of soil freezing of the underground pipelines and the like can occur. The temperature of the city natural gas entering the municipal gas distribution pipe network is preferably not lower than 5 ℃ according to the operation specification of the city gas. The common design solution in the pressure regulating station at present is mainly to increase the temperature of natural gas entering a pressure regulating valve through heat exchange before pressure reduction, and the main scheme is to adopt a hot water circulating system or an electric heating system.

The following problems mainly exist in the adoption of the hot water circulation system and the electric heating system:

1. most heating systems are generally used in winter with lower air temperature, the utilization rate of equipment is low, and the construction cost is high;

2. the energy consumption is high, the hot water circulating system is required to be arranged between the gas water heaters when heat exchange is carried out, and the electric heater is required to be provided with a large electric load, so that the use cost is high;

3. generally, water is used as an indirect heat exchange medium, and the station needs to have good water supply and power supply requirements at the same time, so that the construction limit is large.

Disclosure of Invention

The invention aims to provide a natural gas pressure-regulated heat exchange and temperature-rising device to solve the problems.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a heat transfer rising temperature device behind natural gas pressure regulating, includes import takeover (1), import manometer (2), ball valve (3), needle valve (4), filter (5), gas trip valve, one-level pressure regulator (7), relief valve, heat exchanger, second grade pressure regulator (10), export manometer (11), export takeover (12), outlet (13).

The number of the gas cut-off valves is 2, and the gas cut-off valves comprise a first gas cut-off valve (61) and a second gas cut-off valve (62); the number of the safety valves is 2, and the safety valves comprise a first safety valve (81) and a second safety valve (82); the number of the heat exchangers is 2, and the heat exchangers comprise a first heat exchanger (91) and a second heat exchanger (92); the inlet pressure gauge (2), the ball valve (3), the needle valve (4), the filter (5), the first gas stop valve (61), the first pressure regulator (7), the first safety valve (81), the first heat exchanger (91), the second gas stop valve (62), the second pressure regulator (10), the second safety valve (82), the second heat exchanger (92) and the outlet pressure gauge (11) are communicated through pipelines; the inlet connecting pipe (1) is communicated with the inlet pressure gauge (2), the outlet connecting pipe (12) is communicated with the outlet pressure gauge (11), and the water outlet (13) is communicated with the first heat exchanger (91) and the second heat exchanger (92).

Furthermore, the first-stage pressure regulator (7) and the second-stage pressure regulator (10) are wrapped by an electric tracing and a heat-insulating layer.

Furthermore, the pipeline between the first-stage pressure regulator (7) and the first heat exchanger (91) is provided with a stainless steel pipe and a heat insulation layer, and the pipeline between the second-stage pressure regulator (10) and the second heat exchanger (92) is provided with a stainless steel pipe and a heat insulation layer.

Furthermore, the first heat exchanger (91) and the second heat exchanger (92) both adopt fin type air-temperature heat exchangers.

Compared with the prior art, the invention has the beneficial effects that: the efficient fin air-temperature heat exchanger is adopted to exchange heat with air after the pressure of natural gas is regulated each time, the temperature of the natural gas is raised to be basically close to the outdoor temperature, and then the natural gas enters a town natural gas pipeline for use. In the whole process, no additional heat exchange facilities such as a water heating furnace room or a power supply room need to be established, the occupied area and material resources are reduced, and the device is simple and convenient to use and simple to operate.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: 1-inlet connecting pipe, 2-inlet pressure gauge, 3-ball valve, 4-needle valve, 5-filter, 61-first gas cut-off valve, 7-first-stage pressure regulator, 81-first safety valve, 91-first heat exchanger, 62-second gas cut-off valve, 10-second-stage pressure regulator, 82-second safety valve, 92-second heat exchanger, 11-outlet pressure gauge, 12-outlet connecting pipe and 13-drain pipe.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of the present invention. The utility model provides a heat transfer rising temperature device behind natural gas pressure regulating, includes a heat transfer rising temperature device behind natural gas pressure regulating, takes over (1), import manometer (2), ball valve (3), needle valve (4), filter (5), gas trip valve, one-level voltage regulator (7), relief valve, heat exchanger, second grade voltage regulator (10), export manometer (11), export takeover (12), outlet (13) including the import, wherein:

As a specific example, the primary pressure regulator (7) and the secondary pressure regulator (10) are wrapped by an electric tracing and a heat-insulating layer.

As a specific example, a pipeline between the primary pressure regulator (7) and the first heat exchanger (91) and a pipeline between the secondary pressure regulator (10) and the second heat exchanger (92) are both made of stainless steel pipes and additionally provided with heat insulation layers.

As a specific example, the first heat exchanger (91) and the second heat exchanger (92) both adopt fin type air temperature heat exchangers, and a tray is arranged at the lower part and a drain pipe is added, so that condensed water or ice slag is prevented from falling off.

The invention has the advantages that no additional heat exchange facilities such as a water heating furnace room or a power supply room need to be established in the whole process, the occupied area and material resources are reduced, the use is simple and convenient, and the operation is simple.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a heat transfer rising temperature device behind natural gas pressure regulating, includes that import is taken over (1), import manometer (2), ball valve (3), needle valve (4), filter (5), gas trip valve, one-level voltage regulator (7), relief valve, heat exchanger, second grade voltage regulator (10), export manometer (11), export are taken over (12), outlet (13), its characterized in that:

the number of the gas cut-off valves is 2, and the gas cut-off valves comprise a first gas cut-off valve (61) and a second gas cut-off valve (62); the number of the safety valves is 2, and the safety valves comprise a first safety valve (81) and a second safety valve (82); the number of the heat exchangers is 2, and the heat exchangers comprise a first heat exchanger (91) and a second heat exchanger (92); the inlet pressure gauge (2), the ball valve (3), the needle valve (4), the filter (5), the first gas stop valve (61), the first pressure regulator (7), the first safety valve (81), the first heat exchanger (91), the second gas stop valve (62), the second pressure regulator (10), the second safety valve (82), the second heat exchanger (92) and the outlet pressure gauge (11) are sequentially communicated through pipelines; the inlet connecting pipe (1) is communicated with the inlet pressure gauge (2), the outlet connecting pipe (12) is communicated with the outlet pressure gauge (11), and the water outlet (13) is communicated with the first heat exchanger (91) and the second heat exchanger (92).

2. The natural gas pressure-regulating and post-heat-exchange temperature-rising device according to claim 1, characterized in that: the first-stage pressure regulator (7) and the second-stage pressure regulator (10) are wrapped by an electric tracing and a heat-insulating layer.

3. The natural gas pressure-regulating and post-heat-exchange temperature-rising device according to claim 1, characterized in that: the pipeline between the first-stage pressure regulator (7) and the first heat exchanger (91) adopts a stainless steel pipe and an additional heat preservation layer, and the pipeline between the second-stage pressure regulator (10) and the second heat exchanger (92) adopts a stainless steel pipe and an additional heat preservation layer.

4. The natural gas pressure-regulating and post-heat-exchange temperature-rising device according to claim 1, characterized in that: the first heat exchanger (91) and the second heat exchanger (92) both adopt fin type air temperature heat exchangers.