CN117029013A - Incineration device and method for snore waste gas - Google Patents

Abstract

The utility model relates to an incineration device and method for snore waste gas, comprising a combustor, an incineration chamber, a mixing chamber and a tail combustion chamber which are connected in sequence, wherein the combustor and the incineration chamber provide an initial heat source; the mixing chamber finishes the registering and distributing of the snore waste gas and the gradual mixing reaction heating process with the initial heat source; the afterburner provides reaction space and time for the snore exhaust gas; the mixing chamber is of a three-section structure expanding step by step, the first section is provided with a first-stage tail gas spray pipe and a second-stage tail gas spray pipe, and the centers of the first-stage tail gas spray pipe and the second-stage tail gas spray pipe are correspondingly provided with a first-stage post-combustion spray gun and a second-stage post-combustion spray gun; the second section of expansion conical surface is provided with a third-stage tail gas spray pipe, and the second section of cylindrical surface is provided with a fourth-stage tail gas spray pipe and a fifth-stage tail gas spray pipe; the third section of expansion conical surface is provided with a six-level tail gas spray pipe; the inlet of the mixing chamber is provided with a distributor, and the outlet is provided with a choke ring. The utility model realizes the harmless treatment of the ultra-large flow and snore waste gas at a lower preheating temperature and with less consumption of the burning fuel.

Description

Incineration device and method for snore waste gas

Technical Field

The utility model belongs to the technical field of incineration of snore waste gas, and relates to an incineration device and method for the snore waste gas.

Background

With the increasing of the national improvement of atmospheric pollution, the pollution condition of industrial normal waste gas is fundamentally changed, and according to the requirements of the operation stability, the reliability of the treatment effect, the universality of waste gas types, the safety of the process and the like of the waste gas treatment device, the waste gas treatment process in the guidance of the VOCs treatment policy issued by most local governments is basically 3 processes of adsorption, absorption and thermal decomposition (incineration) and the combination process thereof.

Although solvent recovery can save natural resources and significantly reduce the operating costs of enterprises, various industry specifications severely limit the application of solvent recovery processes. Related patents are: a maleic anhydride waste gas recovery device (Nanjing clock chemical Co., ltd.); a maleic anhydride waste gas recovery device (Toyo Kede chemical Co., ltd.) with simple operation.

After the (incineration) thermal decomposition process becomes the mainstream technology of the treatment of the exhaust gas, the equipment is greatly developed and improved. The thermal decomposition process is generally divided into 4 types of direct combustion (TO), regenerative combustion (RTO), catalytic Combustion (CO) and regenerative catalytic combustion (RCO), and only the different combination of a combustion mode and a heat exchange mode is mainly used for treating adsorption concentrated gas and also can be used for directly treating medium-high concentration waste gas with the waste gas concentration more than 3.5g/m < 3 >. The patents are as follows: a maleic anhydride waste gas recovery device (Dongying Hua Ya national aviation fuel Co., ltd.); a method for treating maleic anhydride production waste gas (Huizhui New Material Co., ltd.); a tail gas recycling system for maleic anhydride production (Yunnan is a Hengyuanjia chemical industry Co., ltd.).

For large-flow industrial waste gas, the TO process has more advantages in terms of technical means, investment occupation and the like, and particularly has more prominent economic advantages under the condition that enterprises have fuel production. The Shanghai tetragonal boiler group engineering complete set of companies provides the utility model patent of 'a maleic anhydride waste gas incineration process and boiler system' and 'a maleic anhydride waste gas incineration boiler system (unauthorized)'. The above patent describes the whole process flow and part of the process parameters, but the treatment process of maleic anhydride tail gas of the incinerator and the related technical details are not given, the setting of the structural parameters is also very specific, and the expected effects of reducing the preheating temperature of waste gas and reducing the consumption of co-fired fuel are not achieved.

Disclosure of Invention

The utility model solves the technical problems that: the incinerator for the snore waste gas solves the problem of innocent treatment of the snore waste gas of the incinerator, and achieves the purposes of reducing the preheating temperature of the waste gas and reducing the consumption of accompanying combustion fuel.

The solution of the utility model is as follows: an incinerator for snoring waste gas comprises a burner, an incineration chamber, a mixing chamber and a tail combustion chamber which are connected in sequence;

the burner and the incineration chamber provide an initial heat source; the mixing chamber finishes the registering and distributing of the snore waste gas and the gradual mixing reaction heating process with the initial heat source; the tail combustion chamber is arranged behind the mixing chamber and provides reaction space and time for the snore waste gas;

the main body of the mixing chamber is a mixing section shell, a three-section structure expanding step by step is adopted, a first section of cylindrical surface is provided with a first-stage tail gas spray pipe and a second-stage tail gas spray pipe, a first-stage afterburning spray gun is arranged at the center of the first-stage tail gas spray pipe, and a second-stage afterburning spray gun is arranged at the center of the second-stage tail gas spray pipe; the second section of expansion conical surface is provided with a third-stage tail gas spray pipe, and the second section of cylindrical surface is provided with a fourth-stage tail gas spray pipe and a fifth-stage tail gas spray pipe; the third section of expansion conical surface is provided with a six-level tail gas spray pipe; a distributor is arranged at the inlet of the first section of the mixing chamber, and the flue gas flowing out of the burning chamber enters the primary tail gas spray pipe and the primary afterburning spray gun through the distributor to realize the temperature rising reaction of the snoring waste gas and the fuel gas; the third section outlet of the mixing chamber is provided with a choke ring.

Further, the mixing chamber also includes an exhaust housing;

the tail gas shell is welded on the outer side of the mixed section shell to form a tail gas registering chamber for storing tail gas sprayed by the first-level tail gas spray pipe to the sixth-level tail gas spray pipe.

Further, the expansion conical surface angle of the second section of the mixing chamber is 50-70 degrees, and the expansion conical surface angle of the third section of the mixing chamber is 90-120 degrees;

the diameter of the first section of the mixing chamber is set to be D1, the length of the first section is set to be L1, the diameter of the second section of the mixing chamber is set to be D2, the length of the second section is set to be L2, the diameter of the third section of the mixing chamber is set to be D3, the length of the second section is set to be L3, the average flow rate of the flue gas in the area corresponding to D1, D2 and D3 is 15-20 m/s, the residence time of the flue gas in the area corresponding to L1, L2 and L3 is 1.2 times of the theoretical chemical power reaction time of the tail gas in the same direction as that of the sound, and the choking ring diameter D4 is 0.8-0.9 times of the diameter D3 of the third section of the mixing chamber.

Further, the distributor is provided with a flame stabilizing boss and a plurality of distribution holes, wherein one of the distribution holes is positioned at the center of the distributor and coincides with the axis of the flame stabilizing boss; the rest distribution holes are uniformly distributed on the periphery of the flame stabilizing boss and are spaced from the first-stage afterburning spray gun; the outer diameter D0 of the flame stabilizing boss is not more than 0.5 times of the diameter D1 of the first section of the mixing chamber, and the length L0 of the flame stabilizing boss is not more than 0.5 times of the length L1 of the first section of the mixing chamber.

Further, defining the center of the plane of the primary tail gas spray pipe as a first imaginary tangential circle, wherein the diameter of the first imaginary tangential circle is not larger than the outer diameter D0 of the flame stabilizing boss; the primary tail gas spray pipes are tangentially arranged along the first imaginary tangential circle and are uniformly arranged according to the rotation direction of the first imaginary tangential circle;

the secondary tail gas spray pipe is arranged on a plane between the primary tail gas spray pipe and the tertiary tail gas spray pipe, and the setting position, the number, the rotation direction and the nozzle diameter of the secondary tail gas spray pipe on the plane are the same as those of the primary tail gas spray pipe.

Further, defining the center of the plane of the four-stage tail gas spray pipe as a third imaginary tangential circle, wherein the diameter of the third imaginary tangential circle is 1/3 of the diameter D of the second section of the mixing chamber; the four-stage tail gas spray pipes are tangentially and uniformly distributed along the third imaginary tangential circle, and jet flows with the same rotation direction as the first-stage tail gas spray pipes and the second-stage tail gas spray pipes are generated.

Further, three-stage tail gas spray pipes are centripetally uniformly distributed along the circumference of the tail gas spray pipes, and are adjacent to four-stage tail gas spray pipes to generate centripetally jet;

the three-stage tail gas spray pipes and the four-stage tail gas spray pipes are arranged in a staggered mode, and the spray nozzles of the three-stage tail gas spray pipes and the four-stage tail gas spray pipes are identical in diameter and quantity.

Further, the distance between the five-stage tail gas spray pipe and the four-stage tail gas spray pipe is 1/2-2/3 of the length L2 of the second section of the mixing chamber;

defining the center of the plane of the five-stage tail gas spray pipe as a fourth imaginary tangential circle, wherein the diameter of the fourth imaginary tangential circle is 1/7 of the diameter D2 of the second section of the mixing chamber; the fifth-stage tail gas spray pipes are tangentially and uniformly distributed along the fourth imaginary tangential circle, and jet flow with the same rotation direction as the fourth-stage tail gas spray pipes is generated.

Further, defining the center of the plane of the six-stage tail gas spray pipe as a fifth imaginary tangential circle, wherein the diameter of the fifth imaginary tangential circle is 1/3 of the diameter D3 of the third section of the mixing chamber; the six-stage tail gas spray pipes are centripetal and are uniformly distributed along the tangential direction of the fifth imaginary tangential circle, and jet flow with the same rotation direction as the five-stage tail gas spray pipes is generated.

Further, an incineration method for the snore exhaust gas is provided, and the process is as follows:

two stages of fuel inputs are used: the first stage is to provide an initial heat source for the burner and the incineration chamber by incinerating fuel or waste gas and waste liquid, and the second stage is to provide the rest heat required by the incineration process for the combustion improver by using the normal waste gas by the first-stage afterburning spray gun and the second-stage afterburning spray gun;

the mixing chamber is used for dividing the snore waste gas into four strands through the tail gas registering chamber and the first-level to sixth-level tail gas spray pipes: the flow ratio of the primary tail gas spray pipe and the secondary tail gas spray pipe is 10-20 percent; the flow ratio of the three-stage tail gas spray pipe and the four-stage tail gas spray pipe is 10-20 percent; five-stage tail gas spray pipe flow accounts for 20% -30%; the six-stage tail gas spray pipe flow accounts for 40% -50%;

in the gradual ignition process, the temperature of the initial heat source is between 1100 and 1300 ℃; the theoretical temperature of the flue gas after jet mixing by the primary tail gas jet pipe, the secondary tail gas jet pipe and the primary afterburning spray gun and the secondary afterburning spray gun is 1300-1500 ℃; the theoretical temperature of the flue gas after jet mixing by the three-stage tail gas jet pipe and the four-stage tail gas jet pipe is between 1000 and 1100 ℃; the theoretical temperature of the flue gas after jet mixing by the five-stage tail gas jet pipe is 900-1000 ℃; the theoretical temperature of the flue gas after jet mixing by the six-stage tail gas jet pipe is 780-880 ℃;

the tail combustion chamber provides a preset residence time for the process flue gas, and ensures that the emission reaches the standard.

Compared with the prior art, the utility model has the beneficial effects that:

(1) The utility model arranges the snoring waste gas by reasonable distribution: the burner provides an initial stable heat source and can be used as fuel by fuel gas, fuel oil or other high-calorific-value waste gas and waste liquid; the incinerator is designed to meet environmental protection standards and related requirements, and the residence time of the flue gas temperature is more than 1100 ℃ and is more than 2s, if the incinerator has no related requirements, the incinerator can be simplified; the mixing chamber finishes the registering and distributing of the snore waste gas and the gradual mixing reaction heating process with the initial heat source; the afterburner provides sufficient reaction space and time for the snoring exhaust gas. The utility model achieves the purpose of igniting ultra-large flow snore waste gas step by using a smaller initial heat source and discharging the ultra-large flow snore waste gas up to the standard.

(2) The utility model innovatively designs the size and the structure of the mixing chamber, the afterburning gas gun arranged in the mixing chamber utilizes the glycerin waste gas as a combustion improver to provide the rest heat required by the incineration process, and the mixing chamber divides the glycerin waste gas into a plurality of strands through the tail gas register and the first-stage to sixth-stage tail gas spray pipes, and the initial heat source ignites the glycerin waste gas one by one. The structural size of the mixing chamber can ensure the time and space required by each mixing and reaction of the flue gas; realizing the harmless treatment of the ultra-large flow and snore exhaust gas at a lower preheating temperature and with a lower consumption of the burning fuel.

Drawings

FIG. 1 is an overall assembly view of an incineration device according to an embodiment of the present utility model;

FIG. 2 is a block diagram of a mixing chamber according to an embodiment of the utility model;

FIG. 3a is a cross-sectional view of a distributor according to an embodiment of the present utility model;

FIG. 3b is a top view of a distributor according to an embodiment of the present utility model;

FIG. 4 is a graph showing the distribution of the primary to the six-stage tail gas nozzles according to an embodiment of the present utility model;

wherein: a burner 1, an incineration chamber 2, a mixing chamber 3 and a tail combustion chamber 4;

31 distributor, 32 first-stage post-combustion spray gun, 33, second-stage post-combustion spray gun, 34 mixing section shell, 35 tail gas shell, 36 tail gas registering chamber, 37 lining, 38 tail gas spray pipe, 39 choke ring, 381 first-stage tail gas spray pipe, 382 second-stage tail gas spray pipe, 383 third-stage tail gas spray pipe, 384 fourth-stage tail gas spray pipe, 385 fifth-stage tail gas spray pipe and 386 sixth-stage tail gas spray pipe;

311 distribution holes and 312 flame stabilizing bosses.

Detailed Description

The utility model is further illustrated in the following figures and examples.

Example 1

As shown in fig. 1, the basic structure of the incineration device according to the present utility model comprises: the combustor 1, the incineration chamber 2, the mixing chamber 3 and the tail combustion chamber 4 are sequentially connected with each other.

The burner 1 provides an initial stable heat source and can be used as a combustion accompanying fuel by fuel gas, fuel oil or other waste gas and liquid with high heat value.

The incinerator 2 is designed to meet environmental regulations and related requirements, and the flue gas temperature is >1100 ℃ and the residence time is >2s, if there is no related requirement, the incinerator can be simplified.

The mixing chamber 3 is used for finishing the registering and distributing of the snore waste gas and the gradual mixing reaction heating process with the initial heat source.

The afterburner chamber 4 provides sufficient reaction space and time for the snoring gases after the mixing chamber 3.

As shown in fig. 2, the mixing chamber 3 mainly includes: the distributor 31, the primary afterburner 32, the secondary afterburner 33, the mixing section shell 34, the tail gas shell 35, the tail gas registering chamber 36, the liner 37, the tail gas spray pipe 38, the choke ring 39 and the like.

The mixing section shell 34 is a main body of the mixing chamber 3, and the tail gas shell 35 is welded at the front end of the outer side of the mixing section shell 34 to form a tail gas storage chamber 36 for storing tail gas sprayed from the first-stage to sixth-stage tail gas spraying pipes 381-386. The primary to sixth stage exhaust nozzles 381-386 are welded to the mixing section housing 34 and are embedded in the liner 37.

The main body of the mixing chamber 3 is of a step-by-step expansion structure and is divided into three sections: the first section has a diameter D1 and a length L1, and is provided with a primary tail gas spray pipe 381 and a secondary tail gas spray pipe 382. The expansion conical angle of the second section is 60 degrees, the diameter of the second section is D2, and the length of the second section is L2; the second section of expansion conical surface is provided with a three-stage tail gas spray pipe 383, and the second section of cylindrical surface is provided with a four-stage tail gas spray pipe 384 and a five-stage tail gas spray pipe 385. The expansion conical angle of the third section is 90 degrees, the diameter of the third section is D3, and the length of the third section is L3; the third expansion cone is provided with a six-stage exhaust nozzle 386. The outlet of the mixing chamber 3 is provided with a choke ring 39, and the diameter D4 of the choke ring 39 is 0.85 times the diameter D3 of the third section of the mixing chamber 3.

The distributor 31 is arranged at the inlet of the first section of the mixing chamber 3, and the flue gas flowing out of the incineration chamber 2 enters the primary tail gas spray pipe 381 and the primary afterburner 32 through the distributor 31. The distributor 31 is used for matching the primary tail gas spray pipe 381 with the primary afterburning spray gun 32 to realize rapid temperature rising reaction of the snoring waste gas and the fuel gas. As shown in fig. 3a and 3b, the distributor 31 is provided with a flame stabilizing boss 312 and a plurality of distributing holes 311, wherein one distributing hole 311 is positioned at the center of the distributor 31 and coincides with the axis of the flame stabilizing boss 312; the rest of the distribution holes 311 are uniformly distributed at the periphery of the flame stabilizing boss 312 and are spaced from the primary afterburner lance 32. In this embodiment, the outer diameter D0 of the flame holding boss is 0.5 times the diameter D1 of the first section of the mixing chamber 3, and the length L0 of the flame holding boss is 0.5 times the length L1 of the first section of the mixing chamber 3. If the incineration device has no incineration chamber, the distributor 31 may be removed.

The first-stage afterburner spray gun 32 is arranged in the center of the first-stage tail gas spray pipe 381 and has the same number as the first-stage tail gas spray pipes 381; the secondary exhaust pipe 382 is disposed at the center of the secondary exhaust pipe 382 and has the same number as the secondary exhaust pipe 382.

As shown in fig. 4, the center of the plane where the primary exhaust nozzle 381 is defined is a first imaginary tangential circle, and the diameter of the first imaginary tangential circle is slightly smaller than the outer diameter D0 of the flame holding boss; the primary exhaust nozzles 381 are tangentially arranged along the first imaginary tangential circle and are uniformly opened in accordance with the rotational direction of the first imaginary tangential circle.

The secondary exhaust nozzle 382 is disposed on a plane between the primary exhaust nozzle 381 and the tertiary exhaust nozzle 383, and the location, number, rotation direction and nozzle diameter of the secondary exhaust nozzle 382 on the plane are the same as those of the primary exhaust nozzle 381.

The three-stage tail gas spray pipes 383 are arranged on the second section of the expansion conical surface of the mixing chamber 3 and are centripetally uniformly distributed along the circumference of the mixing chamber and are adjacent to the four-stage tail gas spray pipes 384; the tertiary tail gas nozzle 383 produces a centripetal jet.

Defining the center of the plane of the four-stage exhaust nozzle 384 as a third imaginary tangential circle having a diameter of about 1/3 of the diameter D2 of the second stage of the mixing chamber 3; the four-stage exhaust nozzles 384 are uniformly distributed tangentially along the third imaginary tangential circle, and generate jet streams having the same rotation direction as the first-stage exhaust nozzle 381 and the second-stage exhaust nozzle 382.

The three-stage tail gas spray pipes 383 and the four-stage tail gas spray pipes 384 are arranged in a staggered mode, and the diameters of the spray holes and the spray holes of the four-stage tail gas spray pipes are the same, and the number of the spray holes is the same.

The five stage exhaust nozzle 385 is spaced from the four stage exhaust nozzle 384 by a distance of about 2/3 of the length L2 of the mixing chamber 3. Defining the center of the plane of the five-stage exhaust nozzle 384 as a fourth imaginary tangential circle, the diameter of the fourth imaginary tangential circle being about 1/7 of the diameter D2 of the second section of the mixing chamber 3; the fifth stage exhaust nozzles 384 are tangentially distributed along the fourth imaginary tangential circle to produce a jet flow having the same direction of rotation as the fourth stage exhaust nozzles 384.

The six-stage tail gas spray pipe 386 is arranged on the third section expansion conical surface of the mixing chamber 3, and the center of the plane where the six-stage tail gas spray pipe 386 is positioned is defined as a fifth imaginary tangential circle, and the diameter of the fifth imaginary tangential circle is about 1/3 of the diameter D3 of the third section of the mixing chamber 3; the six-stage exhaust nozzles 386 are centripetal and tangentially distributed along a fifth imaginary tangential circle, producing a jet flow in the same direction as the five-stage exhaust nozzle 385.

The basic principle of the incineration method is that the reasonable distribution of the snore exhaust gas is adopted to achieve the purposes of igniting the ultra-large flow snore exhaust gas step by using a smaller initial heat source and achieving standard emission.

The incineration method suitable for the ultra-large flow snore waste gas based on the incineration device comprises the following steps of:

two stages of fuel inputs are used: the first stage is to provide an initial heat source for the combustor 1 and the incineration chamber 2 by incinerating fuel or waste gas and waste liquid with high calorific value, and the second stage is to provide the rest heat required by the incineration process by the first-stage afterburning spray gun 32 and the second-stage afterburning spray gun 33 by utilizing the normal waste gas as a combustion improver;

the heat load distribution of the burner 1 and the heat load distribution of the primary and secondary afterburner lances 32, 33 depends on the function assumed by the incineration chamber 2: when the incineration chamber 2 carries incineration of waste gas and waste liquid, after meeting the emission standard (such as GB 1884) or other design requirements, the required residual heat load is borne by the primary and secondary afterburner lances 32, 33. When the incineration chamber 2 is only used as the place of occurrence of the initial heat source, the primary post-combustion spray gun 32 and the secondary post-combustion spray gun 33 can not work or cancel the design together with the primary tail gas spray pipe 381, the secondary tail gas spray pipe 382 and the distributor 31;

the mixing chamber 3 divides the glycerin waste gas into four strands through the tail gas registering chamber 36 and the first-stage to sixth-stage tail gas nozzles 381 to 386: the flow ratio of the primary tail gas spray pipe 381 and the secondary tail gas spray pipe 382 is 10-20 percent; the flow ratio of the three-stage tail gas spray pipe 383 and the four-stage tail gas spray pipe 384 is 10-20 percent in total; the flow of the five-stage tail gas spray pipe 385 accounts for 20-30 percent; the flow of the six-stage tail gas spray pipe 386 accounts for 40% -50%;

in the gradual ignition process, the temperature of the initial heat source is between 1100 and 1300 ℃; the theoretical temperature of the flue gas after jet mixing by the primary tail gas jet 381, the secondary tail gas jet 382, the primary afterburner 32 and the secondary afterburner 33 is 1300-1500 ℃; the theoretical temperature of the flue gas after jet mixing by the three-stage tail gas spray pipe 383 and the four-stage tail gas spray pipe 384 is between 1000 and 1100 ℃; the theoretical temperature of the flue gas after jet mixing by the five-stage tail gas jet pipe 385 is 900-1000 ℃; the theoretical temperature of the flue gas after jet mixing by the six-stage tail gas jet pipe 385 is 780-880 ℃;

the structural dimensions of the mixing chamber 3 ensure the time and space required for each mixing and reaction of the fumes: the average flow velocity of the flue gas in the areas corresponding to the dimensions D1, D2 and D3 is 15-20 m/s, and the residence time of the flue gas in the areas corresponding to the lengths L1, L2 and L3 is about 1.2 times of the theoretical chemical power reaction time of the snore tail gas;

the afterburner chamber 4 provides a residence time of 1.2s for the process fumes, ensuring that the emissions reach the standard.

The utility model realizes the harmless treatment of the ultra-large flow and snore exhaust gas at a lower preheating temperature and with less consumption of the burning fuel.

Although the present utility model has been described in terms of the preferred embodiments, it is not intended to be limited to the embodiments, and any person skilled in the art can make any possible variations and modifications to the technical solution of the present utility model by using the methods and technical matters disclosed above without departing from the spirit and scope of the present utility model, so any simple modifications, equivalent variations and modifications to the embodiments described above according to the technical matters of the present utility model are within the scope of the technical matters of the present utility model.

Claims (10)

1. An incinerator for snoring waste gas is characterized by comprising a combustor (1), an incineration chamber (2), a mixing chamber (3) and a tail combustion chamber (4) which are connected in sequence;

the burner (1) and the incineration chamber (2) provide an initial heat source; the mixing chamber (3) finishes the registering and distributing of the snore waste gas and the gradual mixing reaction heating process with the initial heat source; the tail combustion chamber (4) provides reaction space and time for the snore exhaust gas after the mixing chamber (3);

the main body of the mixing chamber (3) is a mixing section shell (34), a three-section structure expanding step by step is adopted, a first section of cylindrical surface is provided with a first-stage tail gas spray pipe (381) and a second-stage tail gas spray pipe (382), the center of the first-stage tail gas spray pipe (381) is provided with a first-stage afterburning spray gun (32), and the center of the second-stage tail gas spray pipe (382) is provided with a second-stage afterburning spray gun (33); the second section of expansion conical surface is provided with a three-level tail gas spray pipe (383), and the second section of cylindrical surface is provided with a four-level tail gas spray pipe (384) and a five-level tail gas spray pipe (385); the third section of expansion conical surface is provided with a six-stage tail gas spray pipe (386); a distributor (31) is arranged at the inlet of the first section of the mixing chamber (3), and the flue gas flowing out of the incineration chamber (2) enters a primary tail gas spray pipe (381) and a primary afterburning spray gun (32) through the distributor (31) so as to realize the temperature rising reaction of the normal waste gas and the fuel gas; a choke ring (39) is arranged at the outlet of the third section of the mixing chamber (3).

2. The incineration device for snoring waste gases according to claim 1, characterised in that the mixing chamber (3) further comprises a tail gas housing (35);

the tail gas shell (35) is welded on the outer side of the mixing section shell (34) to form a tail gas registering chamber (36) for storing tail gas sprayed by the first-level to sixth-level tail gas spray pipes (381-386).

3. The incineration device for the snoring waste gas according to claim 1, wherein the expansion conical angle of the second section of the mixing chamber (3) is 50-70 degrees, and the expansion conical angle of the third section of the mixing chamber (3) is 90-120 degrees;

the diameter of the first section of the mixing chamber (3) is set to be D1, the length of the first section is L1, the diameter of the second section of the mixing chamber (3) is set to be D2, the length of the second section is set to be L2, the diameter of the third section of the mixing chamber (3) is set to be D3, the average flow rate of smoke in the area corresponding to D1, D2 and D3 is set to be 15-20 m/s, the residence time of the smoke in the area corresponding to L1, L2 and L3 is 1.2 times of the theoretical chemical power reaction time of the down-flow tail gas, and the diameter D4 of the choking ring (39) is set to be 0.8-0.9 times of the diameter D3 of the third section of the mixing chamber (3).

4. A burner for snoring an exhaust gas according to claim 3, wherein the distributor (31) is provided with flame holding bosses (312) and a plurality of distribution holes (311), wherein one of the distribution holes (311) is located in the centre of the distributor (31) coinciding with the axis of the flame holding bosses (312); the rest distribution holes (311) are uniformly distributed at the periphery of the flame stabilizing boss (312) and are spaced from the first-stage afterburning spray gun (32); the outer diameter D0 of the flame stabilizing boss is not more than 0.5 times of the diameter D1 of the first section of the mixing chamber (3), and the length L0 of the flame stabilizing boss is not more than 0.5 times of the length L1 of the first section of the mixing chamber (3).

5. The incinerator for snoring waste gas as claimed in claim 4, wherein the center of the plane defining the primary tail gas nozzle (381) is a first imaginary tangential circle, and the diameter of the first imaginary tangential circle is not larger than the outer diameter D0 of the flame stabilizing boss; the primary tail gas spray pipes (381) are tangentially arranged along the first imaginary tangential circle and are uniformly arranged according to the rotation direction of the first imaginary tangential circle;

the secondary tail gas spray pipe (382) is arranged on a plane between the primary tail gas spray pipe (381) and the tertiary tail gas spray pipe (383), and the arrangement position, the number, the rotation direction and the nozzle diameter of the secondary tail gas spray pipe (382) on the plane are the same as those of the primary tail gas spray pipe (381).

6. The incineration device for the snoring exhaust as claimed in claim 5, wherein the center of the plane in which the four-stage exhaust nozzle (384) is defined is a third imaginary tangential circle having a diameter of 1/3 of the diameter D2 of the second section of the mixing chamber (3); the four-stage tail gas spray pipes (384) are uniformly distributed in a tangential direction along the third imaginary tangential circle, and jet flows with the same rotation direction as the first-stage tail gas spray pipe (381) and the second-stage tail gas spray pipe (382) are generated.

7. The incinerator for snoring waste gas as claimed in claim 6, wherein the tertiary tail gas nozzles (383) are centripetally distributed along the circumference of the incinerator, and are adjacent to the quaternary tail gas nozzles (384) to generate centripetally jet;

the three-stage tail gas spray pipes (383) and the four-stage tail gas spray pipes (384) are arranged in a staggered mode, and the diameters of the spray pipes and the spray pipes are the same, and the number of the spray pipes is the same.

8. The incineration device for the snoring exhaust as claimed in claim 6, wherein the distance between the fifth exhaust nozzle (385) and the fourth exhaust nozzle (384) is 1/2-2/3 of the length L2 of the second section of the mixing chamber (3);

defining the center of the plane of the five-stage tail gas spray pipe (384) as a fourth imaginary tangential circle, wherein the diameter of the fourth imaginary tangential circle is 1/7 of the diameter D2 of the second section of the mixing chamber (3); the fifth-stage tail gas spray pipes (384) are uniformly distributed tangentially along the fourth imaginary tangential circle, and jet flow with the same rotation direction as the fourth-stage tail gas spray pipes (384) is generated.

9. The incineration device for the snoring exhaust as claimed in claim 8, wherein the center of the plane in which the six-stage exhaust nozzle (386) is defined is a fifth imaginary tangential circle having a diameter of 1/3 of the diameter D3 of the third section of the mixing chamber (3); the six-stage exhaust nozzles (386) are centripetal and are uniformly distributed along the tangential direction of the fifth imaginary tangential circle, and generate jet flow with the same rotation direction as the five-stage exhaust nozzles (385).

10. A method for incinerating snoring exhaust gas based on the device of claim 9, characterized by the following procedure:

two stages of fuel inputs are used: the first stage is to provide an initial heat source for the combustor (1) and the incineration chamber (2) by incinerating fuel or waste gas and waste liquid, and the second stage is to provide the rest heat required by the incineration process by using the normal waste gas as a combustion improver for the first-stage afterburning spray gun (32) and the second-stage afterburning spray gun (33);

the mixing chamber (3) divides the glycerin waste gas into four strands through the tail gas registering chamber (36) and the first-level to sixth-level tail gas spray pipes (381-386): the flow ratio of the primary tail gas spray pipe (381) and the secondary tail gas spray pipe (382) is 10-20 percent; the flow ratio of the three-stage tail gas spray pipe (383) and the four-stage tail gas spray pipe (384) is 10-20 percent; the flow of the five-stage tail gas spray pipe (385) accounts for 20% -30%; the flow of the six-stage tail gas spray pipe (386) accounts for 40-50 percent;

in the gradual ignition process, the temperature of the initial heat source is between 1100 and 1300 ℃; the theoretical temperature of the flue gas after jet mixing by the primary tail gas jet pipe (381), the secondary tail gas jet pipe (382), the primary afterburning spray gun (32) and the secondary afterburning spray gun (33) is 1300-1500 ℃; the theoretical temperature of the flue gas after jet mixing by the three-stage tail gas jet pipe (383) and the four-stage tail gas jet pipe (384) is between 1000 and 1100 ℃; the theoretical temperature of the flue gas after jet mixing by the five-stage tail gas jet pipe (385) is 900-1000 ℃; the theoretical temperature of the flue gas after jet mixing by the six-stage tail gas jet pipe (385) is 780-880 ℃;

the tail combustion chamber (4) provides preset residence time for the process flue gas, and ensures that the emission reaches the standard.