CN113638172B

CN113638172B - Energy-saving and environment-friendly setting machine based on natural gas as energy source

Info

Publication number: CN113638172B
Application number: CN202111030049.8A
Authority: CN
Inventors: 陈尧春
Original assignee: Shaoxing Tianzhe Energy Co ltd
Current assignee: Shaoxing Tianzhe Energy Co ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2023-06-23
Anticipated expiration: 2041-09-03
Also published as: CN113638172A

Abstract

The energy-saving environment-friendly shaping machine based on natural gas as an energy source comprises a shaping oven on the shaping machine, wherein the shaping oven comprises an insulation box shell, a horizontal partition plate is fixedly inserted in the insulation box shell, the partition plate separates the inside of the insulation box shell into an upper shaping chamber and a heat exchange chamber, a wind feeding box is inserted in one side of the shaping chamber, and a radiator and a circulating fan are inserted in the heat exchange chamber; one side shaping of air feed case has two sets of upper and lower relative design bellows and lower design bellows, inserts between upper design bellows and the lower design bellows and is equipped with the cloth feed guide rail, and the lower extreme shaping of air feed case has the air inlet box of downwardly extending, and the lower extreme of air inlet box passes the baffle and inserts to establish at the indoor shaping of air supply and have the air-supply line, fixedly connected with circulating fan on the air-supply line. The natural gas is mainly catalyzed by the combustion catalyst to be converted into heat energy, so that the utilization rate of energy is improved; meanwhile, the heat exchange and internal circulation air supply of the heat exchanger are adopted, so that the shaping quality of the fabric is improved.

Description

Energy-saving and environment-friendly setting machine based on natural gas as energy source

Technical Field

The invention relates to the technical field of natural gas setting machines, in particular to an energy-saving environment-friendly setting machine based on natural gas as an energy source.

Background

The traditional natural gas setting machine is provided with a burner, after natural gas is ignited by open flame, hot air heated by the open flame is transmitted to the fabric in the oven of the setting machine through a circulating fan, and although the cost of the natural gas is lower than that of electric heating, a plurality of defects exist: the natural gas is conveyed by the circulating fan instead of hot air when the burner is not ignited, and the explosion occurs when the concentration of the natural gas in the oven reaches about 6%; secondly, the shaping quality of the fabric is affected, the natural gas flame burns under the condition of insufficient combustion, a large amount of particles can be formed in the air due to insufficient combustion, the particles can adhere to the fabric, the quality is affected, and the air with the particles is discharged to cause pollution; thirdly, the temperature of the shaping is uneven, and the temperature of the circulating air is not uniform as the heat exchange of the heat exchanger by adopting a drying shaping mode of open flame combustion and circulating air supply, so that the quality of shaping cloth can be affected by the uneven temperature; and fourthly, the energy consumption is high, the conversion rate of converting heat energy by adopting open flame combustion is low, and the utilization rate of energy sources is low while natural gas is consumed.

Disclosure of Invention

The invention aims at overcoming the defects of the prior art, and provides an energy-saving environment-friendly setting machine based on natural gas as energy, which mainly utilizes a combustion catalyst to catalyze the natural gas to convert the natural gas into heat energy, so that the utilization rate of the energy is improved; meanwhile, the heat exchange and internal circulation air supply of the heat exchanger are adopted, so that the shaping quality of the fabric is improved.

The energy-saving environment-friendly shaping machine based on natural gas as an energy source comprises a shaping oven on the shaping machine, wherein the shaping oven comprises an insulation box shell, a horizontal partition plate is fixedly inserted in the insulation box shell, the partition plate separates the inside of the insulation box shell into an upper shaping chamber and a heat exchange chamber, a wind feeding box is inserted in one side of the shaping chamber, and a radiator and a circulating fan are inserted in the heat exchange chamber; two groups of upper shaping air boxes and lower shaping air boxes which are opposite up and down are formed on one side of the air box, a cloth feeding guide rail is inserted between the upper shaping air boxes and the lower shaping air boxes, an air inlet box which extends downwards is formed at the lower end of the air box, an air inlet pipe is formed in the air supply chamber by inserting the lower end of the air inlet box through a partition plate, and a circulating fan is fixedly connected to the air inlet pipe; the partition plate is provided with a ventilation slot hole which is communicated with the shaping chamber and the heat exchange chamber, the air inlet of the radiator is fixedly connected with a wind scooper, and the wind scooper is fixed on the partition plate and is communicated with the ventilation slot hole;

the outer side of the heat insulation box shell is provided with a gas heater, the gas heater comprises a heat-generating pile shell, a plurality of horizontal heating pipes are inserted into the heat-generating pile shell, a combustion catalyst coating is coated and fixed on the inner wall of the heating pipes, two ends of each heating pipe are respectively inserted and fixed on end plates at two sides of the heat-generating pile shell, an air inlet cover and an air exhaust cover which are communicated with an inlet and an outlet of each heating pipe are respectively fixed on the heat-generating pile shell, a natural gas inlet pipe and an oxygen supplementing pipe are fixedly connected on the air inlet cover, and an exhaust pipe is fixedly connected on the air exhaust cover;

the upper end and the lower end of the heat-generating pile shell are respectively provided with a circulating air inlet and a circulating air outlet, the heat-generating pile shell is respectively fixed with an air inlet cover and an air exhaust cover which are communicated with the circulating air inlet and the circulating air outlet, the air inlet cover and the air exhaust cover are respectively fixedly connected with an air inlet pipeline and an air outlet pipeline, and the air outlet pipeline and the air inlet pipeline are fixed on the radiator through the heat-insulating box shell and are respectively communicated with the heat exchange inlet and the heat exchange outlet of the radiator; the tail end of the exhaust pipe is fixed on the air outlet pipeline and is communicated with the air outlet pipeline; and the air inlet pipeline is fixedly connected with a pressure relief pipe.

Preferably, the upper side edge of the upper shaping bellows close to one side of the air supply box is formed together with the upper side edge of the air supply opening of the air supply box, the lower side edge of the lower shaping bellows close to one side of the air supply box is formed together with the lower side edge of the air supply opening of the air supply box, and a conical guide plate is formed between the lower side plate of the upper shaping bellows close to one side of the air supply box and the upper side edge of the lower shaping bellows close to one side of the air supply box.

Preferably, a supporting plate is inserted in the shaping chamber of the insulation box shell, the lower side edge of the supporting plate is fixed on the partition plate, and the upper side edge of the supporting plate is fixed on the lower shaping bellows.

Preferably, the heating pipe consists of an air inlet burning pipe at the inner upper part of the gas heater and an air outlet burning pipe at the inner lower part of the gas heater, and the air inlet cover and the exhaust cover are both fixed on the side wall of one side of the housing of the heating pile and are respectively communicated with the inlet of the air inlet burning pipe and the outlet of the air outlet burning pipe; a bypass air passage which is communicated with an inlet gas burning pipe outlet and an outlet gas burning pipe inlet is fixed on the side wall of the other side of the shell of the heat generator, and an electronic igniter is fixedly inserted into the inlet of the inlet gas burning pipe.

Preferably, the bypass airway is fixedly connected with a temperature sensor, and a probe of the temperature sensor is inserted into the bypass airway.

Preferably, an oxygen inlet pipe is arranged between the oxygen supplementing pipe and the air inlet cover, and the oxygen inlet pipe is fixedly connected with a high-pressure fan; the oxygen supplementing pipe is fixedly connected to the oxygen inlet pipe, and the oxygen inlet pipe is fixed on the air inlet cover and communicated with the air inlet cover.

Preferably, the air inlet cover is provided with an air inlet cylinder, the side wall of the air inlet cylinder is provided with an air inlet hole communicated with an air inlet pipeline, the air inlet cylinder is fixedly connected with a variable frequency motor, an air inlet impeller is fixedly inserted in a rotating shaft of the variable frequency motor, and the air inlet impeller is inserted in the air inlet cover.

Preferably, the air outlet pipeline and the exhaust pipe are covered with heat insulation sleeves, and the pressure release pipe and the oxygen supplementing pipe are respectively fixed with a first one-way valve and a second one-way valve; the natural gas inlet pipe is fixedly connected with a flow regulating valve, and the exhaust pipe is fixedly connected with a combustible gas concentration sensor.

Preferably, the outside of the gas heater is provided with a protective shell, and a plurality of gas alarms are arranged in the protective shell and the insulation box shell.

The invention has the beneficial effects that:

1. the natural gas is catalyzed by the combustion catalyst to be converted into heat energy, so that the utilization rate of energy is improved; meanwhile, the heat exchange and internal circulation air supply of the heat exchanger are adopted, so that the shaping quality of the fabric is improved.

2. The catalytic structure adopted by the device can realize full catalytic reaction of natural gas, and meanwhile, the device is provided with a gas detection structure, so that the natural gas in waste gas can be detected, and the heat in the waste gas can be utilized, so that the safety is ensured, and the utilization rate of energy sources is improved.

3. The gas alarm devices are arranged at a plurality of positions in the designed setting machine, so that when natural gas leaks, the gas alarm device can alarm in time, and the safety of the natural gas setting machine is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of the structure of the gas heater according to the present invention;

fig. 3 is an enlarged partial schematic view at a in fig. 2.

In the figure: 1. a thermal insulation box shell; 2. a partition plate; 21. a ventilation slot; 3. a heat sink; 4. a blow box; 41. a sizing bellows is arranged on the upper part; 42. a lower shaping bellows; 43. an air inlet box; 44. a deflector; 45. an air inlet pipe; 5. a gas heater; 51. a heat-generating stack housing; 52. a heating tube; 521. an intake gas burnup pipe; 522. a gas outlet burnup pipe; 53. a combustion catalyst coating; 54. an air inlet cover; 55. an exhaust hood; 56. an air inlet cover; 561. an air inlet cylinder; 57. an exhaust hood; 58. an electronic igniter; 59. a bypass airway; 510. an oxygen inlet pipe; 520. a high-pressure fan; 530. a variable frequency motor; 540. an air inlet impeller; 550. a temperature sensor; 6. a wind scooper; 7. an air outlet pipeline; 8. an air inlet pipeline; 9. a circulating fan; 10. a support plate; 11. a natural gas inlet pipe; 12. an oxygen supplementing tube; 13. an exhaust pipe; 14. a pressure relief tube; 15. a combustible gas concentration sensor; 16. a flow regulating valve; 17. a first one-way valve; 18. a second one-way valve; 19. a gas alarm; 20. a cloth feeding guide rail; 21. a protective housing; 22. and (5) distributing materials.

Detailed Description

Examples: referring to fig. 1 to 3, an energy-saving and environment-friendly shaping machine based on natural gas as an energy source comprises a shaping oven on the shaping machine, wherein the shaping oven comprises an insulation box shell 1, a horizontal partition plate 2 is fixedly inserted into the insulation box shell 1, the partition plate 2 separates an shaping chamber a and a heat exchange chamber b at the upper part inside the insulation box shell 1, one side of the shaping chamber a is inserted with a wind feeding box 4, and the heat exchange chamber b is inserted with a radiator 3 and a circulating fan 9; two groups of upper shaping air boxes 41 and lower shaping air boxes 42 which are opposite up and down are formed on one side of the air supply box 4, a cloth feeding guide rail 20 is inserted between the upper shaping air boxes 41 and the lower shaping air boxes 42, an air inlet box 43 which extends downwards is formed at the lower end of the air supply box 4, an air inlet pipe 45 is formed in the air supply chamber b by inserting the lower end of the air inlet box 43 into the air supply chamber b through a partition plate 2, and a circulating fan 9 is fixedly connected to the air inlet pipe 45; the partition plate 2 is provided with a ventilation slot 21 for communicating the shaping chamber a and the heat exchange chamber b, an air inlet of the radiator 3 is fixedly connected with a wind scooper 6, and the wind scooper 6 is fixed on the partition plate 2 and communicated with the ventilation slot 21;

the outside of the insulation can shell 1 is provided with a gas heater 5, the gas heater 5 comprises a heating pile shell 51, a plurality of horizontal heating pipes 52 are inserted into the heating pile shell 51, combustion catalyst coatings 53 are coated and fixed on the inner walls of the heating pipes 52, two ends of the heating pipes 52 are respectively inserted and fixed on end plates at two sides of the heating pile shell 51, an air inlet cover 54 and an air outlet cover 55 which are communicated with the inlet and the outlet of the heating pipes 52 are respectively fixed on the heating pile shell 51, a natural gas inlet pipe 11 and an oxygen supplementing pipe 12 are fixedly connected on the air inlet cover 54, and an exhaust pipe 13 is fixedly connected on the air outlet cover 55;

the upper end and the lower end of the heater shell 51 are respectively provided with a circulating air inlet 511 and a circulating air outlet 512, the heater shell 51 is respectively fixed with an air inlet cover 56 and an air exhaust cover 57 which are communicated with the circulating air inlet 511 and the circulating air outlet 512, the air inlet cover 56 and the air exhaust cover 57 are respectively fixedly connected with an air inlet pipeline 8 and an air outlet pipeline 7, and the air outlet pipeline 7 and the air inlet pipeline 8 penetrate through the insulation box shell 1 to be fixed on the radiator 3 and are respectively communicated with a heat exchange inlet and a heat exchange outlet of the radiator 3; the tail end of the exhaust pipe 13 is fixed on the air outlet pipeline 7 and is communicated with the air outlet pipeline 7; the air inlet pipeline 8 is fixedly connected with a pressure relief pipe 14.

Preferably, the upper side edge of the upper shaping bellows 41 close to one side of the air supplying bellows 4 is formed together with the upper side edge of the air supplying opening in the air supplying bellows 4, the lower side edge of the lower shaping bellows 42 close to one side of the air supplying bellows 4 is formed together with the lower side edge of the air supplying opening in the air supplying bellows 4, and a conical guide plate 44 is formed between the lower side plate of the upper shaping bellows 41 close to one side of the air supplying bellows 4 and the upper side edge of the lower shaping bellows 42 close to one side of the air supplying bellows 4.

Preferably, the support plate 10 is inserted in the shaping chamber a of the insulation box shell 1, the lower side edge of the support plate 10 is fixed on the partition plate 2, and the upper side edge of the support plate 10 is fixed on the lower shaping bellows 42.

Preferably, the heating tube 52 is composed of an air inlet burnup tube 521 at the upper part in the gas heater 5 and an air outlet burnup tube 522 at the lower part in the gas heater 5, and the air inlet cover 54 and the air outlet cover 55 are fixed on the side wall of one side of the heater shell 51 and are respectively communicated with the inlet of the air inlet burnup tube 521 and the outlet of the air outlet burnup tube 522; a bypass air passage 59 which is communicated with the outlet of the air inlet fuel consumption pipe 521 and the inlet of the air outlet fuel consumption pipe 522 is fixed on the side wall of the other side of the heat-generating pile shell 51, and an electronic igniter 58 is inserted and fixed in the inlet of the air inlet fuel consumption pipe 521.

Preferably, the bypass air passage 59 is fixedly connected with a temperature sensor 550, and a probe of the temperature sensor 550 is inserted into the bypass air passage 59.

Preferably, an oxygen inlet pipe 510 is arranged between the oxygen supplementing pipe 12 and the air inlet cover 54, and a high-pressure fan 520 is fixedly connected to the oxygen inlet pipe 510; the oxygen supplementing tube 12 is fixedly connected to an oxygen inlet tube 510, and the oxygen inlet tube 510 is fixed to the air inlet hood 54 and is communicated with the air inlet hood 54.

Preferably, the air inlet cover 56 is formed with an air inlet cylinder 561, an air inlet hole communicated with the air inlet pipeline 8 is formed on the side wall of the air inlet cylinder 561, the air inlet cylinder 561 is fixedly connected with a variable frequency motor 530, an air inlet impeller 540 is fixedly inserted in the rotating shaft of the variable frequency motor 530, and the air inlet impeller 540 is inserted in the air inlet cover 56.

Preferably, the air outlet pipeline 7 and the exhaust pipe 13 are covered with heat insulation sleeves, and the pressure relief pipe 14 and the oxygen supplementing pipe 12 are respectively fixed with a first check valve 17 and a second check valve 18; the natural gas inlet pipe 11 is fixedly connected with a flow regulating valve 16, and the exhaust pipe 13 is fixedly connected with a combustible gas concentration sensor 15.

Preferably, a protective shell 21 is arranged on the outer side of the gas heater 5, and a plurality of gas alarms 19 are arranged in the protective shell 21 and the insulation can shell 1.

Working principle: the invention is an energy-saving environment-friendly setting machine based on natural gas as energy, the energy-saving environment-friendly setting machine is a natural gas setting machine, the main technical point of the setting machine is that a heating pipe 52 is arranged in a gas heater 5, a combustion catalyst coating 53 is mainly coated on the inner wall of the heating pipe 52, and the combustion catalyst coating 53 and a natural gas catalytic reaction mode are utilized to replace a flame combustion mode for heating; the full catalytic reaction of the natural gas can be realized, the corresponding flame is burnt, the conversion rate of the natural gas into heat energy can be greatly improved, and the utilization rate of the natural gas is improved;

when the gas heater is specifically used, in the initial heating process of the gas heater 5, the natural gas entering the heating pipe 52 is firstly ignited by the electronic igniter 58, the heating of the heating pipe 52 is realized, the catalytic reaction temperature of the combustion catalyst coating 53 is realized, when the catalytic reaction temperature is reached, the temperature is monitored and fed back to the electronic igniter 58 by the temperature sensor 550, the electronic igniter 58 stops igniting, no flame is generated, the subsequent natural gas generates catalytic reaction heat, the heat generated by the heating pipe 52 enters the air outlet pipeline 7 by wind power and is then transmitted to the radiator 3, the radiator 3 realizes heat exchange by the circulating fan 9, and the hot air circulation in the shaping chamber a and the air supply chamber b is realized;

meanwhile, the waste gas after the catalytic decomposition of the natural gas in the gas heater 5 has higher temperature, the waste gas is communicated with the air outlet pipeline 7, and heat in the waste gas can also exchange heat through the radiator 3, so that the utilization rate of resources is improved.

The examples are presented to illustrate the invention and are not intended to limit the invention. Modifications to the described embodiment may occur to those skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention is therefore set forth in the appended claims.

Claims

1. Energy-concerving and environment-protective type forming machine based on natural gas is energy, including the shaping oven on the forming machine, the shaping oven includes insulation can shell (1), and insulation can shell (1) interpolation is established and is fixed with horizontally baffle (2), and shaping room (a) and heat exchange room (b) on upper portion are become in inside of insulation can shell (1), its characterized in that are separated to baffle (2): one side of the shaping chamber (a) is inserted with a wind feeding box (4), and the heat exchange chamber (b) is inserted with a radiator (3) and a circulating fan (9); two groups of upper shaping bellows (41) and lower shaping bellows (42) which are opposite from each other up and down are formed on one side of the air supply box (4), a cloth feeding guide rail (20) is inserted between the upper shaping bellows (41) and the lower shaping bellows (42), an air inlet box (43) which extends downwards is formed at the lower end of the air supply box (4), an air inlet pipe (45) is formed in the air supply chamber (b) by inserting the lower end of the air inlet box (43) through a partition plate (2), and a circulating fan (9) is fixedly connected to the air inlet pipe (45); the partition board (2) is provided with a ventilation slot (21) which is communicated with the shaping chamber (a) and the heat exchange chamber (b), the air inlet of the radiator (3) is fixedly connected with a wind scooper (6), and the wind scooper (6) is fixed on the partition board (2) and is communicated with the ventilation slot (21);

the gas heater (5) is arranged on the outer side of the heat preservation box shell (1), the gas heater (5) comprises a heat-generating pile shell (51), a plurality of horizontal heat-generating pipes (52) are inserted in the heat-generating pile shell (51), a combustion catalyst coating (53) is coated and fixed on the inner wall of each heat-generating pipe (52), two ends of each heat-generating pipe (52) are respectively inserted and fixed on end plates on two sides of the heat-generating pile shell (51), an air inlet cover (54) and an air outlet cover (55) which are communicated with the inlet and the outlet of each heat-generating pipe (52) are respectively fixed on the heat-generating pile shell (51), a natural gas inlet pipe (11) and an air supplementing pipe (12) are fixedly connected on the air inlet cover (54), and an exhaust pipe (13) is fixedly connected on the air outlet cover (55);

the upper end and the lower end of the heat-generating pile shell (51) are respectively provided with a circulating air inlet (511) and a circulating air outlet (512), the heat-generating pile shell (51) is respectively fixed with an air inlet cover (56) and an air exhaust cover (57) which are communicated with the circulating air inlet (511) and the circulating air outlet (512), the air inlet cover (56) and the air exhaust cover (57) are respectively fixedly connected with an air inlet pipeline (8) and an air outlet pipeline (7), and the air outlet pipeline (7) and the air inlet pipeline (8) penetrate through the heat-insulating box shell (1) to be fixed on the radiator (3) and are respectively communicated with a heat exchange inlet and a heat exchange outlet of the radiator (3); the tail end of the exhaust pipe (13) is fixed on the air outlet pipeline (7) and is communicated with the air outlet pipeline (7); the air inlet pipeline (8) is fixedly connected with a pressure relief pipe (14);

the heating pipe (52) consists of an air inlet burning pipe (521) at the inner upper part of the gas heater (5) and an air outlet burning pipe (522) at the inner lower part of the gas heater (5), and the air inlet cover (54) and the air outlet cover (55) are fixed on the side wall of one side of the housing (51) of the heating pile and are respectively communicated with the inlet of the air inlet burning pipe (521) and the outlet of the air outlet burning pipe (522); a bypass air passage (59) which is communicated with the outlet of the air inlet burning pipe (521) and the inlet of the air outlet burning pipe (522) is fixed on the side wall of the other side of the heater shell (51), and an electronic igniter (58) is inserted and fixed in the inlet of the air inlet burning pipe (521).

2. The energy-saving and environment-friendly setting machine based on natural gas as energy source according to claim 1, wherein the energy-saving and environment-friendly setting machine is characterized in that: the upper shaping bellows (41) is close to the upper side edge of one side of the air supply bellows (4) and the upper side edge of the air supply opening of the air supply bellows (4) are formed together, the lower side edge of one side of the lower shaping bellows (42) close to the air supply bellows (4) and the lower side edge of the air supply opening of the air supply bellows (4) are formed together, and a conical guide plate (44) is formed between the lower side plate of the upper shaping bellows (41) close to one side of the air supply bellows (4) and the upper side edge of the lower shaping bellows (42) close to one side of the air supply bellows (4).

3. The energy-saving and environment-friendly setting machine based on natural gas as energy source according to claim 2, wherein the energy-saving and environment-friendly setting machine is characterized in that: the shaping chamber (a) of the insulation box shell (1) is internally provided with a supporting plate (10), the lower side edge of the supporting plate (10) is fixed on the partition plate (2), and the upper side edge of the supporting plate (10) is fixed on the lower shaping bellows (42).

4. The energy-saving and environment-friendly setting machine based on natural gas as energy source according to claim 1, wherein the energy-saving and environment-friendly setting machine is characterized in that: the bypass air passage (59) is fixedly connected with a temperature sensor (550), and a probe of the temperature sensor (550) is inserted into the bypass air passage (59).

5. The energy-saving and environment-friendly setting machine based on natural gas as energy source according to claim 1, wherein the energy-saving and environment-friendly setting machine is characterized in that: an oxygen inlet pipe (510) is arranged between the oxygen supplementing pipe (12) and the air inlet cover (54), and a high-pressure fan (520) is fixedly connected to the oxygen inlet pipe (510); the oxygen supplementing pipe (12) is fixedly connected to the oxygen inlet pipe (510), and the oxygen inlet pipe (510) is fixed to the air inlet cover (54) and is communicated with the air inlet cover (54).

6. The energy-saving and environment-friendly setting machine based on natural gas as energy source according to claim 1, wherein the energy-saving and environment-friendly setting machine is characterized in that: the air inlet cover (56) on the shaping have air inlet tube (561), the shaping has the inlet port that is linked together with air inlet pipe (8) on the lateral wall of air inlet tube (561), air inlet tube (561) on fixedly connected with inverter motor (530), the pivot of inverter motor (530) is gone up the plug bush and is fixed with air inlet impeller (540), air inlet impeller (540) are inserted and are established in air inlet cover (56).

7. The energy-saving and environment-friendly setting machine based on natural gas as energy source according to claim 1, wherein the energy-saving and environment-friendly setting machine is characterized in that: the air outlet pipeline (7) and the exhaust pipe (13) are coated with heat insulation sleeves, and the pressure relief pipe (14) and the oxygen supplementing pipe (12) are respectively fixed with a first one-way valve (17) and a second one-way valve (18); the natural gas inlet pipe (11) is fixedly connected with a flow regulating valve (16), and the exhaust pipe (13) is fixedly connected with a combustible gas concentration sensor (15).

8. The energy-saving and environment-friendly setting machine based on natural gas as energy source according to claim 1, wherein the energy-saving and environment-friendly setting machine is characterized in that: the outside of gas heater (5) be equipped with protective housing (21), all install a plurality of gas alarm (19) in protective housing (21) and insulation can shell (1).