A kind of rock gas decompressor that possesses height, middle pressure pressure-reducing function simultaneously
(1) technical field
The utility model relates to compressed natural gas station pressure regulating equipment, particularly a kind of rock gas decompressor that possesses height, middle pressure pressure-reducing function simultaneously.
(2) background technique
Along with the extensive use of compressed natural gas, a lot of Natural gas letdown stations has appearred in domestic various places now, As time goes on, has occurred a kind of middle sled car device of pressing again, and this device is safer, and cost is more cheap, and material and technology are all very ripe.According to mode in the past, pressure-reducing station reduces pressure from high pressure, and the mode of decompression all is that to take two-stage decompression, heat exchange mode be the two-stage heat exchange, and caliber is to make according to the requirement at high pressure relief station.And above-mentioned middle pressure sled car utilize the decompressor at this high pressure relief station to carry out pressure regulation after flow not enough, the progression of decompression is too much, the equipment work instability is adjusted loaded down with trivial details.Therefore needing a kind of device had both kept the function that high pressure is unloaded, and pressed the function of unloading in having again, and operation must be simple, and it is convenient to adjust, and can guarantee that again the sled car of two kinds of pressure ratings can be unloaded simultaneously.
(3) model utility content
The purpose of this utility model is at above-mentioned existing problems, a kind of simple in structure, safe and reliable, convenient maintenance is provided, possesses the rock gas decompressor of height, middle pressure pressure-reducing function when applicability is strong.
The technical solution of the utility model:
A kind of possess height simultaneously, middle rock gas decompressor of pressing pressure-reducing function, form by high-pressure natural gas relief line and middle pressure rock gas relief line, the high-pressure natural gas relief line comprises the high-pressure natural gas import, high pressure valve, high pressure filter, high-pressure shut-off, high pressure heat exchanger, high-voltage regulator, the middle heat exchanger of pressing, press pressure governor and pressure duct outlet valve in the pressure duct and be connected in series by pipeline, high pressure heat exchanger is a coil pipe heat exchange-type hermetically sealed can structure, the middle rock gas relief line of pressing comprises the middle rock gas import of pressing, Middle pressure valve, middle press filtration device, the middle cut-off valve of pressing, the middle heat exchanger of pressing, in press pressure governor and middle pressure pipe way outlet valve in the pressure pipe road and be connected in series by pipeline, the middle pressure heat exchanger of high-pressure natural gas relief line and the middle pressure heat exchanger of middle pressure rock gas relief line are a shared heat exchanger, middle pressure heat exchanger is a coil pipe heat exchange-type hermetically sealed can structure, the heat exchanger coiled pipe of the heat exchanger coiled pipe of high-pressure natural gas and middle pressure rock gas all is arranged in the sealing jar, and the pressure duct by pressure duct and middle pressure pipe way outlet valve is combined into a pipeline with middle pressure pipe road and is connected with the gas outlet pipeline.
Working procedure of the present utility model: at first high pressure is prized car and high pressure and unloaded and mouthful link to each other, the compressed natural gas of high pressure enters into the high-pressure inlet valve, through filter, and the heat absorption before the heat exchanger that the high pressure Emergeny Cutoff Valves enters into high pressure reduces pressure.Reducing pressure through the high pressure decompressor after the heat absorption enters into the heat exchanger of pressing again and absorbs heat, and enters user's pipe network through middle pressure decompressor to outlet conduit after the heat absorption.In delay unloading with decompressor in compress into and mouthful link to each other, through the Middle pressure valve of import, filter, middle pressure Emergeny Cutoff Valves enter into presses heat exchanger to carry out the gas heat absorption, the decompressor of pressing in the laggard mistake of absorbing heat reduces pressure, and imports outlet conduit at last and supplies with user's pipe network.In this device, high pressure the unload middle pressure heat exchanger of pipeline of the middle pressure heat exchanger of pipeline and middle pressure of unloading is a shared heat exchange container, and economical with materials is saved the space.This device is made skid mounted equipment structure, convenient transportation and installation.
The utility model has the advantages that: this rock gas decompressor is simple in structure, easy to implement, easy to maintenance and safe and reliable, this device is made skid mounted equipment, convenient transportation and installation, can satisfy the gas demand of unloading of high pressure sled car and middle pressure sled car simultaneously, and adjust conveniently, can increase work efficiency greatly.
(4) description of drawings
Accompanying drawing is this device schematic flow sheet.
Among the figure: 1. press in high-pressure natural gas import 2. high pressure valves 3. high pressure filters 4. high-pressure shut-off 5. high pressure heat exchangers 6. high-voltage regulators 7. to press in the press filtration device 10. in rock gas import 8. Middle pressure valves 9. to press in the cut-off valve 11. to press in heat exchanger 12. pressure ducts and press pressure pipe way outlet valve 15. pressure duct outlet valves 16. gas outlet pipelines in the pressure governor 14. in the pressure governor 13. in the pressure pipe road
(5) embodiment
Embodiment: the rock gas decompressor of pressing pressure-reducing function in a kind of having, form by high-pressure natural gas relief line and middle pressure rock gas relief line, the high-pressure natural gas relief line comprises high-pressure natural gas import 1, high pressure valve 2, high pressure filter 3, high-pressure shut-off 4, high pressure heat exchanger 5, high-voltage regulator 6, the middle heat exchanger 11 of pressing, press pressure governor 12 and pressure duct outlet valve 15 in the pressure duct and be connected in series by pipeline, high pressure heat exchanger 5 is a coil pipe heat exchange-type hermetically sealed can structure, the middle rock gas relief line of pressing comprises the middle rock gas import 7 of pressing, Middle pressure valve 8, middle press filtration device 9, the middle cut-off valve 10 of pressing, the middle heat exchanger 11 of pressing, in press pressure governor 13 and middle pressure pipe way outlet valve 14 in the pressure pipe road and be connected in series by pipeline, the middle pressure heat exchanger 11 of high-pressure natural gas relief line and the middle pressure heat exchanger 11 of middle pressure rock gas relief line are a shared heat exchanger, middle pressure heat exchanger 11 is a coil pipe heat exchange-type hermetically sealed can structure, the heat exchanger coiled pipe of the heat exchanger coiled pipe of high-pressure natural gas and middle pressure rock gas all is arranged in the sealing jar, by pressure duct and middle pressure pipe way outlet valve 15,14 pressure duct is combined into a pipeline with middle pressure pipe road and is connected with gas outlet pipeline 16.