阅读说明：本技术 一种多物料与煤共气化生产合成气的气化装置和气化方法 (Gasification device and gasification method for producing synthesis gas by co-gasification of multiple materials and coal ) 是由 高攀 钟思青 徐俊 金永明 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种多物料与煤共气化生产合成气的气化装置及气化方法,该气化装置包括：气化炉、热旋风分离器,以及依次设置的洗涤气体的洗涤器和除灰尘的静电除尘器；所述气化炉上设置有原料A入口、原料B入口和气化炉出口；高温气体通过气化炉出口进入热旋风分离器；该气化装置还设置有热解炉和干燥设备,原料A经过干燥设备脱水后通过原料A入口进入气化炉,原料B经过热解炉焦化后通过原料B入口进入气化炉；所述热旋风分离器和所述洗涤器之间设置有换热器；所述气化炉内设置有高温等离子加热枪。本发明提供的装置和方法能够使得多物料与煤能够快速充分气化,并得到高品质合成气,具有广泛的应用价值和前景。(The invention discloses a gasification device and a gasification method for producing synthesis gas by co-gasification of multiple materials and coal, wherein the gasification device comprises: the gasification furnace, the hot cyclone separator, and a scrubber for washing gas and an electrostatic dust collector for removing dust which are arranged in sequence; the gasification furnace is provided with a raw material A inlet, a raw material B inlet and a gasification furnace outlet; high-temperature gas enters the hot cyclone separator through the outlet of the gasification furnace; the gasification device is also provided with a pyrolysis furnace and drying equipment, the raw material A is dehydrated by the drying equipment and then enters the gasification furnace through a raw material A inlet, and the raw material B is coked by the pyrolysis furnace and then enters the gasification furnace through a raw material B inlet; a heat exchanger is arranged between the hot cyclone separator and the scrubber; and a high-temperature plasma heating gun is arranged in the gasification furnace. The device and the method provided by the invention can quickly and fully gasify the multi-material and the coal, obtain high-quality synthesis gas and have wide application value and prospect.)

1. A gasification device for producing synthesis gas by co-gasification of multiple materials and coal is characterized by comprising: a gasification furnace (7) used for gasifying materials, a hot cyclone separator (13) used for receiving high-temperature gas gasified by the gasification furnace (7), and a scrubber (15) used for scrubbing gas and an electrostatic dust collector (16) used for removing dust which are arranged in sequence; the gasification furnace (7) is provided with a raw material A inlet (6), a raw material B inlet (18) and a gasification furnace outlet (12); high-temperature gas enters a hot cyclone separator (13) through a gasification furnace outlet (12); the gasification device is also provided with a pyrolysis furnace (10) and a drying device (5), the raw material A is dehydrated by the drying device (5) and then enters the gasification furnace (7) through a raw material A inlet (6), and the raw material B is coked by the pyrolysis furnace (10) and then enters the gasification furnace (7) through a raw material B inlet (18); a heat exchanger (14) is arranged between the thermal cyclone separator (13) and the scrubber (15), and the heat of the high-temperature gas passing through the thermal cyclone separator (13) after heat exchange through the heat exchanger (14) sequentially passes through the pyrolysis furnace (10) and the drying equipment (5) to coke the raw material B and dehydrate the raw material A; and a high-temperature plasma heating gun (8) is arranged in the gasification furnace (7).

2. A gasification apparatus according to claim 1, wherein the inner part of the gasification furnace (7) is divided into a gasification furnace upper free space region (19), a gasification furnace fluidization region (20), a gasification furnace moving bed region (21), a gasification furnace gasification region (22), and a gasification furnace slag region (23) in the gravity direction in this order from top to bottom, the gasification furnace slag region (23) of the gasification furnace (7) communicates with the gasification furnace gasification region (22), the gasification furnace gasification region (22) communicates with the gasification furnace moving bed region (21), and the gasification furnace moving bed region (21) communicates with the gasification furnace upper free space region (19); the raw material A inlet (6) is arranged at a position that the raw material A (1) enters a gasification furnace fluidization area (20); the raw material B inlet (18) is disposed at a position such that the raw material B (9) enters the upper free space region (19) of the gasification furnace.

3. A gasification apparatus according to claim 1 or 2, wherein the gasifier gasification zone (22) and the gasifier slag zone (23) are each independently cylindrical; the gasifier moving bed area (21) and the gasifier fluidization area (20) are respectively and independently conical, and the ratio of the maximum cross section to the cross section area of the gasifier slag area (23) is not less than 4; the upper free space zone (19) of the gasification furnace is in a vault shape.

4. A gasification apparatus according to any one of claims 1 to 3, wherein the ratio of the height of the gasifier moving bed zone (21) and the gasifier fluidization zone (20) is (3-10): 1; the ratio of the height of the free space zone (19) at the upper part of the gasification furnace to the height of the fluidized zone (20) of the gasification furnace is (5-10): 1.

5. A gasification unit according to any one of claims 1 to 4, characterized in that the gasifier (7) is provided with a recycle inlet (11) at 1/4-3/4 of the gasifier moving bed zone (21) for receiving solid particles separated by the thermal cyclone (13); the position of the raw material A inlet (6) is at the joint of the free space zone (19) at the upper part of the gasification furnace and the fluidization zone (20) of the gasification furnace; the raw material B inlet (18) is located at the dome-shaped 1/4-1/2 of the free space zone (19) at the upper part of the gasification furnace.

6. The gasification apparatus according to any one of claims 1 to 5, wherein the high temperature plasma heating lance (8) of the gasification furnace (7) is disposed at 1/2 of the gasification region (22) of the gasification furnace, and is arranged coaxially and horizontally with an angle of 5 to 45 ° to the horizontal direction, and the number of the high temperature plasma heating lance is 2N, wherein N is a natural number greater than 0.

7. A gasification method for producing synthesis gas by co-gasification of multi-materials and coal, which is characterized in that the gasification method uses the gasification device for producing synthesis gas by co-gasification of multi-materials and coal according to any one of claims 1 to 6, and comprises the following steps:

(a) the raw material A (1) is dehydrated by a drying device (5) and then enters a gasification furnace fluidization area (20) through a raw material A inlet (6); the raw material B (9) is coked by a pyrolysis furnace (10), enters a free space area (19) at the upper part of the gasification furnace through a raw material B inlet (18), and then enters a fluidization area (20) of the gasification furnace;

(b) the high-temperature gas heated by the high-temperature plasma heating gun (8) and the material from the moving bed area (21) of the gasification furnace are subjected to gasification reaction, the gasified gas moves to the upper space, the high-temperature slag flows downwards, enters the slag area (23) of the gasification furnace and is discharged with liquid slag through a slag discharge port;

(c) the gasified high-temperature gas sequentially passes through a gasification furnace moving bed area (21), a gasification furnace fluidization area (20) and a gasification furnace upper free space area (19), enters a thermal cyclone separator (13) through a gasification furnace outlet (12), is separated, solid particles enter the gasification furnace moving bed area (21) through a circulating material inlet (11), and the gas enters a heat exchanger (14); the high-temperature gas passing through the heat exchanger (14) firstly pyrolyzes the raw material B (9); dehydrating the raw material A (1) by the heat of the second low temperature after pyrolysis;

(d) and the gas after heat exchange sequentially passes through a scrubber (15) and an electrostatic dust collector (16) to obtain synthesis gas.

8. The gasification method according to claim 7, wherein the operating pressure of the gasification furnace (7) is 0-5 MPa, and the temperature of the pyrolysis furnace (10) is 600-900 ℃; the temperature range of the drying equipment (5) is 200-300 ℃.

9. A gasification method according to claim 7 or 8, wherein the high temperature plasma heating lance (8) heats the gasifying agent to 3000-6000 ℃, and the gasifying agent is CO₂Water vapor or the mixed gas thereof, and the linear velocity of the gasifying agent is 100-350 m/s.

10. The gasification method according to any one of claims 7 to 9, wherein the raw material a (1) is one or more of biomass, lignite, household garbage or construction waste, and has a particle size in the range of 100 to 1000 μm; the raw material B (9) is bituminous coal or anthracite, the particle size range is 100-1000 mu m, and the feeding mass ratio of the raw material A inlet (6) to the raw material B inlet (18) is (0.1-0.5): 1.

11. A gasification method according to any one of claims 7 to 10 wherein the gasifier slag zone (23) temperature is 1300 to 1500 ℃, the solid holdup is 0.8 to 0.95; the core temperature of the gasification area (22) of the gasification furnace is 1500-2000 ℃, and the solid content is 0.1-0.25; the temperature of a moving bed area (21) of the gasification furnace is 800-900 ℃, and the solid content is 0.6-0.75; the temperature of a gasification furnace fluidization area (20) is 800-850 ℃, and the solid content is 0.3-0.6; the temperature of the free space zone (19) at the upper part of the gasification furnace is 700-800 ℃, and the solid holdup is 0.1-0.3.

Technical Field

The invention belongs to the technical field of coal gasification, and particularly relates to a gasification device and a gasification method for producing synthesis gas by co-gasification of multiple materials and coal.

Background

Coal is an important energy source, and is used in a direct combustion mode, but the direct combustion mode causes low utilization rate of the coal and can pollute the environment. Therefore, a coal gasification technology has been developed to convert coal into coal gas to improve the utilization rate of coal and reduce environmental pollution. Conventionally, various coal gasification technologies and systems having a fixed bed, a fluidized bed, and an entrained flow have been studied in order to efficiently produce combustible gas by coal gasification.

Biomass, municipal waste and construction waste are also important energy sources, which are widely distributed and in large quantities. Meanwhile, the multi-material co-gasification technology has low energy density, is dispersive and is difficult to be intensively processed on a large scale, so that the multi-material co-gasification technology can realize higher utilization rate on a smaller scale and can provide a high-grade energy form, and the multi-material and coal co-gasification technology is an important development direction. Because China has wide regions and abundant resources and the traditional incineration has great influence on the environment, the co-gasification and high-efficiency gasification of a plurality of materials and coal has better living conditions and development space.

However, the existing gasification method has the problems of low gas quality caused by the overproof of metals and harmful gases such as dioxin in the synthesis gas, incomplete conversion of tar in the gasification process, poor fluidization state and the like. The solution of these problems is a challenge to the emergence of new approaches.

Disclosure of Invention

In view of the defects of the conventional gasification of the synthesis gas produced by co-gasification of multi-material and coal, the invention provides a gasification device and a gasification method for co-gasification of multi-material and coal to produce the synthesis gas.

In order to solve the above technical problem, a first aspect of the present invention provides a gasification apparatus for producing a synthesis gas by co-gasification of a plurality of materials and coal, wherein the gasification apparatus comprises: a gasification furnace 7 for gasifying materials, a thermal cyclone 13 for receiving high-temperature gas gasified by the gasification furnace 7, and a scrubber 15 for washing gas and an electrostatic precipitator 16 for removing dust, which are arranged in sequence; the gasification furnace 7 is provided with a raw material A inlet 6, a raw material B inlet 18 and a gasification furnace outlet 12; high-temperature gas enters a hot cyclone separator 13 through a gasification furnace outlet 12; the gasification device is also provided with a pyrolysis furnace 10 and a drying device 5, the raw material A is dehydrated by the drying device 5 and then enters a gasification furnace 7 through a raw material A inlet 6, and the raw material B is coked by the pyrolysis furnace 10 and then enters the gasification furnace 7 through a raw material B inlet 18; a heat exchanger 14 is arranged between the thermal cyclone 13 and the scrubber 15, and heat of the high-temperature gas passing through the thermal cyclone 13 after heat exchange through the heat exchanger 14 (heat B passing through the pyrolysis furnace is shown as a diagram 17, and heat A passing through the drying device is shown as a diagram 4) sequentially passes through the pyrolysis furnace 10 and the drying device 5 so that the raw material B is coked and the raw material A is dehydrated; and a high-temperature plasma heating gun 8 is arranged in the gasification furnace 7.

In the embodiment of the present invention, the interior of the gasification furnace 7 is divided into a gasification furnace upper free space region 19, a gasification furnace fluidization region 20, a gasification furnace moving bed region 21, a gasification furnace gasification region 22, and a gasification furnace slag region 23 in the gravity direction in this order from top to bottom, the gasification furnace slag region 23 of the gasification furnace 7 is communicated with the gasification furnace gasification region 22, the gasification furnace gasification region 22 is communicated with the gasification furnace moving bed region 21, and the gasification furnace moving bed region 21 is communicated with the gasification furnace upper free space region 19; the raw material A inlet 6 is arranged at a position that the raw material A1 enters a gasification furnace fluidization area 20; the raw material B inlet 18 is disposed at a position such that the raw material B9 enters the upper free space region 19 of the gasification furnace.

In an embodiment of the present invention, the gasifier gasification zone 22 and the gasifier slag zone 23 may be independently cylindrical; the gasifier moving bed zone 21 and the gasifier fluidized zone 20 can be conical independently, and the ratio of the area of the maximum cross section to the area of the cross section of the gasifier slag zone 23 is preferably not less than 4; the upper gasifier freeboard zone 19 can be dome-shaped.

In the embodiment of the invention, the height ratio of the gasifier moving bed area 21 to the gasifier fluidized area 20 can be (3-10): 1; the ratio of the heights of the gasifier upper free space zone 19 and the gasifier fluidizing zone 20 can be (5-10): 1.

In the embodiment of the invention, the gasification furnace 7 is provided with a circulating material inlet 11 at 1/4-3/4 of a gasification furnace moving bed area 21 and is used for receiving solid particles separated by a thermal cyclone separator 13; the raw material A inlet 6 is positioned at the junction of the gasifier upper free space zone 19 and the gasifier fluidization region 20; the raw material B inlet 18 is formed in a dome-shaped 1/4-1/2 in the upper free space zone 19 of the gasification furnace.

In the embodiment of the invention, the high-temperature plasma heating gun 8 of the gasification furnace 7 is arranged at 1/2 of the gasification region 22 of the gasification furnace, is horizontally and coaxially arranged, and has an included angle of 5-45 degrees with the horizontal direction, and the number of the high-temperature plasma heating guns is 2N, wherein N is a natural number larger than 0.

In another aspect, the present invention provides a gasification method for producing a synthesis gas by co-gasification of a plurality of materials and coal, wherein the gasification method uses the gasification apparatus for producing a synthesis gas by co-gasification of a plurality of materials and coal, and the gasification method includes the following steps:

(a) the raw material A1 is dehydrated by a drying device 5 and then enters a gasification furnace fluidization area 20 through a raw material A inlet 6; the raw material B9 is coked by the pyrolysis furnace 10, enters a free space zone 19 at the upper part of the gasification furnace through a raw material B inlet 18, and then enters a fluidization zone 20 of the gasification furnace;

(b) the high-temperature gas heated by the high-temperature plasma heating gun 8 and the material from the moving bed area 21 of the gasification furnace are subjected to gasification reaction, the gasified gas moves to the upper space, the high-temperature slag flows downwards, enters the slag area 23 of the gasification furnace and is discharged with liquid slag through a slag discharge port;

(c) the gasified high-temperature gas sequentially passes through a gasification furnace moving bed area 21, a gasification furnace fluidization area 20 and a gasification furnace upper free space area 19, enters a thermal cyclone separator 13 through a gasification furnace outlet 12, is separated, solid particles enter the gasification furnace moving bed area 21 through a circulating material inlet 11, and the gas enters a heat exchanger 14; the high temperature gas (heat B shown in fig. 17) after passing through heat exchanger 14 first pyrolyzes feedstock B9; the heat of the second lowest temperature after pyrolysis (heat a is shown in diagram 4) dehydrates feedstock A1;

(d) and the gas after heat exchange sequentially passes through a scrubber 15 and an electrostatic precipitator 16 to obtain synthesis gas.

In the invention, under the optimal condition of strengthening the reaction, improving the reaction efficiency and fully utilizing the heat, the operating pressure of the gasification furnace 7 is 0-5 MPa, and the temperature range of the pyrolysis furnace 10 is 600-900 ℃; the temperature range of the drying equipment 5 is 200-300 ℃.

In the embodiment of the present invention, in the step (a), the materials a and B enter the space of the moving bed zone 21 of the gasification furnace due to gravity and furnace shape after entering the fluidization zone 20 of the gasification furnace, and then react with the high-temperature gas heated by the high-temperature plasma heating gun 8 in the step (B).

In the embodiment of the invention, the high-temperature plasma heating gun 8 can heat the gasifying agent to 3000-6000 ℃, and the gasifying agent can be CO₂Steam or mixed gas thereof, and the linear velocity of the gasifying agent can be 100-350 m/s.

In the embodiment of the invention, the raw material A1 can be one or more of biomass, lignite, household garbage or construction waste, and the particle size range is 100-1000 μm; the raw material B9 can be bituminous coal or anthracite, the particle size range is 100-1000 mu m, and the feeding mass ratio of the raw material A inlet 6 to the raw material B inlet 18 is 0.1-0.5: 1.

In the embodiment of the invention, in order to rapidly co-gasify the multi-material and the coal, preferably, the temperature of the gasifier slag zone 23 is 1300-1500 ℃, the solid content is 0.8-0.95, the core temperature of the gasifier gasification zone 22 is 1500-2000 ℃, the solid content is 0.1-0.25, the temperature of the gasifier moving bed zone 21 is 800-900 ℃, the solid content is 0.6-0.75, the temperature of the gasifier fluidization zone 20 is 800-850 ℃, the solid content is 0.3-0.6, the temperature of the gasifier upper free space zone 19 is 700-800 ℃, and the solid content is 0.1-0.3.

In the embodiment of the invention, after the multi-material and coal are fully gasified and reacted, the residue in the slag zone 23 of the gasification furnace is vitreous body, the chemical property is stable, the environment is friendly, the gasification zone 22 of the gasification furnace is gasified and pyrolyzed at high temperature, macromolecules are all pyrolyzed, only small molecular compounds are contained, and the content of dioxin in tail gas is lower than 0.3ng/Nm³。

According to the gasification device and the gasification method for producing the synthesis gas by co-gasification of the multiple materials and the coal, the combined devices such as layered distribution, multiple reaction zones and plasma heating are adopted, the technical scheme that the reaction can be enhanced, the heat is fully utilized, the zone temperature is better controlled, and the reaction efficiency is improved is adopted.

Drawings

The invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a gasification apparatus and a gasification process for producing synthetic gas by co-gasification of multiple materials and coal according to an embodiment of the present invention (arrows indicate the flow direction of materials or heat);

FIG. 2 is a schematic view of a gasifier in a gasification apparatus in an embodiment of the present invention;

wherein 1 is a raw material A; 2 is slag; 3 is synthesis gas; 4 is heat A; 5, drying equipment; 6 is an inlet of a raw material A; 7 is a gasification furnace; 8 is a high-temperature plasma heating gun; 9 is a raw material B; 10 is a pyrolysis furnace; 11 is a circulating material inlet; 12 is the outlet of the gasification furnace; 13 is a hot cyclone separator; 14 is a heat exchanger; 15 is a washer; 16 is an electrostatic precipitator; 17 is heat B; 18 is an inlet of a raw material B; 19 is the upper free space zone of the gasification furnace; 20 is a gasification furnace fluidization area; 21 is a gasification furnace moving bed area; 22 is a gasification area of a gasification furnace; and 23 is a slag zone of the gasification furnace.

Detailed Description

In order that the invention may be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. However, before the invention is described in detail, it is to be understood that this invention is not limited to particular embodiments described. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.

In the present invention, the raw materials or components used may be commercially or conventionally prepared unless otherwise specified.

In the present invention, the gas composition can be measured using an on-line gas analyzer, and the carbon conversion x can be expressed as: x is 12 (V)_CO+V_CO2+V_CH4)/(22.4*m*w_c) In the formula V_CO2、V_CO、V_CH4Respectively CO produced in the reaction time t₂、CO、CH₄M is the mass of the material at that moment, w_cIs the mass fraction of carbon element in the raw material.

Example 1

As shown in fig. 1 and 2, a gasification apparatus for co-gasification of a multi-material and coal to produce a synthesis gas, includes:

a gasification furnace 7 for gasifying materials, a thermal cyclone 13 for receiving high-temperature gas gasified by the gasification furnace 7, and a scrubber 15 for washing gas and an electrostatic precipitator 16 for removing dust, which are arranged in sequence; the gasification furnace 7 is provided with a raw material A inlet 6, a raw material B inlet 18 and a gasification furnace outlet 12; high-temperature gas enters a hot cyclone separator 13 through a gasification furnace outlet 12; the gasification device is also provided with a pyrolysis furnace 10 and a drying device 5, the raw material A is dehydrated by the drying device 5 and then enters a gasification furnace 7 through a raw material A inlet 6, and the raw material B is coked by the pyrolysis furnace 10 and then enters the gasification furnace 7 through a raw material B inlet 18; a heat exchanger 14 is arranged between the thermal cyclone separator 13 and the scrubber 15, and the heat of the high-temperature gas passing through the thermal cyclone separator 13 after heat exchange through the heat exchanger 14 sequentially passes through the pyrolysis furnace 10 and the drying equipment 5 to coke the raw material B and dehydrate the raw material A; and a high-temperature plasma heating gun 8 is arranged in the gasification furnace 7.

In the gravity direction, the inner part of the gasification furnace 7 is divided into a gasification furnace upper free space zone 19, a gasification furnace fluidization zone 20, a gasification furnace moving bed zone 21, a gasification furnace gasification zone 22 and a gasification furnace slag zone 23 in sequence from top to bottom, the gasification furnace slag zone 23 of the gasification furnace 7 is communicated with the gasification furnace gasification zone 22, the gasification furnace gasification zone 22 is communicated with the gasification furnace moving bed zone 21, and the gasification furnace moving bed zone 21 is communicated with the gasification furnace upper free space zone 19; the raw material A inlet 6 is arranged at a position that the raw material A1 enters a gasification furnace fluidization area 20; the raw material B inlet 18 is disposed at a position such that the raw material B9 enters the upper free space region 19 of the gasification furnace;

the gasification furnace gasification region 22 and the gasification furnace slag region 23 are respectively and independently cylindrical; the gasifier moving bed region 21 and the gasifier fluidization region 20 are respectively and independently conical, and the ratio of the area of the maximum cross section to the area of the cross section of the gasifier slag region 23 is 4; the upper free space zone 19 of the gasification furnace is in a vault shape; the ratio of the height of the gasifier moving bed region 21 to the height of the gasifier fluidization region 20 is 3: 1; the ratio of the height of the gasifier upper freeboard zone 19 to the height of the gasifier fluidizing zone 20 is 5: 1.

The gasification furnace 7 is provided with a circulating material inlet 11 at 1/4 of the gasification furnace moving bed area 21 and is used for receiving solid particles separated by the thermal cyclone separator 13; the raw material A inlet 6 is positioned at the junction of the gasifier upper free space zone 19 and the gasifier fluidization region 20; the raw material B inlet 18 is in the dome shape 1/4 of the upper free space zone 19 of the gasification furnace.

The high-temperature plasma heating gun 8 of the gasification furnace 7 is arranged at 1/2 of the gasification region 22 of the gasification furnace, and the horizontal coaxial arrangement and the included angle with the horizontal direction are 5 degrees, and the number of the high-temperature plasma heating guns is 4.

A gasification method for producing synthesis gas by co-gasification of multiple materials and coal comprises the following steps:

(a) the raw material A1 is dehydrated by a drying device 5 and then enters a gasification furnace fluidization area 20 through a raw material A inlet 6; the raw material B9 is coked by the pyrolysis furnace 10, enters a free space zone 19 at the upper part of the gasification furnace through a raw material B inlet 18, and then enters a fluidization zone 20 of the gasification furnace;

(b) the high-temperature gas heated by the high-temperature plasma heating gun 8 and the material from the moving bed area 21 of the gasification furnace are subjected to gasification reaction, the gasified gas moves to the upper space, the high-temperature slag flows downwards, enters the slag area 23 of the gasification furnace and is discharged with liquid slag through a slag discharge port;

(c) the gasified high-temperature gas sequentially passes through a gasification furnace moving bed area 21, a gasification furnace fluidization area 20 and a gasification furnace upper free space area 19, enters a thermal cyclone separator 13 through a gasification furnace outlet 12, is separated, solid particles enter the gasification furnace moving bed area 21 through a circulating material inlet 11, and the gas enters a heat exchanger 14; the high-temperature gas passing through the heat exchanger 14 firstly pyrolyzes the raw material B9; dehydrating the raw material A1 by the heat of the second lowest temperature after pyrolysis;

(d) and the gas after heat exchange sequentially passes through a scrubber 15 and an electrostatic precipitator 16 to obtain synthesis gas.

The operating pressure of the gasification furnace 7 is 5MPa, and the temperature interval of the pyrolysis furnace 10 is 900 ℃; the temperature interval of the drying device 5 is 300 ℃. The high-temperature plasma heating gun 8 heats the gasifying agent to 6000 ℃, and the gasifying agent is CO₂Steam or mixed gas thereof, and the linear velocity of the gasifying agent is 350 m/s. The raw material A1 is biomass (straws), and the average particle size range is 800 mu m; the raw material B9 is bituminous coal, the average particle size range is 800 mu m, and the feeding mass ratio of the raw material A inlet 6 to the raw material B inlet (18) is 0.5: 1. The temperature of the gasifier slag zone 23 is 1500 ℃, the solid content rate is 0.95, the core temperature of the gasifier gasification zone 22 is 2000 ℃, the solid content rate is 0.25, the temperature of the gasifier moving bed zone (21) is 900 ℃, the solid content rate is 0.75, the temperature of the gasifier fluidization zone 20 is 850 ℃, the solid content rate is 0.3, the temperature of the gasifier upper free space zone 19 is 800 ℃, and the solid content rate is 0.1.

Through detection, the dust content is 3 percent, the carbon conversion rate is 97 percent, the effective gas component of the synthetic gas of the gasification furnace is 75 percent, and the dioxin content is 0.2ng/Nm³The operation stability is greatly improved, and the residue is vitreous body, has stable chemical property and is environment-friendly.

Example 2

Example 2 the same gasification apparatus as in example 1, except that:

the gasification furnace gasification region 22 and the gasification furnace slag region 23 are respectively and independently cylindrical; the gasifier moving bed area 21 and the gasifier fluidization area 20 are respectively and independently conical, and the ratio of the maximum cross section to the cross section area of the gasifier slag area 23 is 6; the upper free space zone 19 of the gasification furnace is in a vault shape;

the height ratio of the gasifier moving bed area 21 to the gasifier fluidization area 20 is 5: 1; the ratio of the height of the gasifier upper freeboard zone 19 to the height of the gasifier fluidizing zone 20 is 6: 1.

The gasification furnace 7 is provided with a circulating material inlet 11 at 1/2 of the gasification furnace moving bed area 21 and is used for receiving solid particles separated by the thermal cyclone separator 13; the raw material A inlet 6 is positioned at the junction of the gasifier upper free space zone 19 and the gasifier fluidization region 20; the raw material B inlet 18 is in the dome shape 7/20 of the upper free space zone 19 of the gasification furnace.

The high-temperature plasma heating gun 8 of the gasification furnace 7 is arranged at 1/2 of the gasification region 22 of the gasification furnace, is horizontally and coaxially arranged, and has an included angle of 12 degrees with the horizontal direction, and the number of the high-temperature plasma heating guns is 6.

The operating pressure of the gasification furnace 7 is 4MPa, and the temperature range of the pyrolysis furnace 10 is 850 ℃; the temperature interval of the drying device 5 is 250 ℃. The high-temperature plasma heating gun 8 heats the gasifying agent to 5500 ℃, and the gasifying agent is CO₂Steam or mixed gas thereof, and the linear velocity of the gasifying agent is 300 m/s. The raw material A1 is domestic garbage, and the average particle size range is 500 mu m; the raw material B9 is anthracite, the average grain diameter range is 500 mu m, and the feeding mass ratio of the raw material A inlet 6 to the raw material B inlet 18 is 0.3: 1. The temperature of the slag zone 23 of the gasification furnace is 1450 ℃, the solid content rate is 0.9, the core temperature of the gasification zone 22 of the gasification furnace is 1800 ℃, the solid content rate is 0.2, the temperature of the moving bed zone 21 of the gasification furnace is 850 ℃, the solid content rate is 0.65, the temperature of the fluidization zone 20 of the gasification furnace is 825 ℃, the solid content rate is 0.4, the temperature of the free space zone 19 at the upper part of the gasification furnace is 760 ℃, and the solid content rate is 0.15.

Through detection, the dust content is 3.2%, the carbon conversion rate is 96.5%, and the effective gas components of the synthetic gas of the gasification furnace73.5%, dioxin content 0.22ng/Nm³The operation stability is greatly improved, and the residue is vitreous body, has stable chemical property and is environment-friendly.

Example 3

Example 3 the same gasification apparatus as in example 1, except that:

the gasification furnace gasification region 22 and the gasification furnace slag region 23 are respectively and independently cylindrical; the gasifier moving bed area 21 and the gasifier fluidization area 20 are respectively and independently conical, and the ratio of the maximum cross section to the cross section area of the gasifier slag area 23 is 9; the upper free space zone 19 of the gasification furnace is in a vault shape;

the ratio of the height of the gasifier moving bed region 21 to the height of the gasifier fluidization region 20 is 8: 1; the ratio of the height of the gasifier upper freeboard zone 19 to the height of the gasifier fluidizing zone 20 is 8: 1.

The gasification furnace 7 is provided with a circulating material inlet 11 at 3/4 of the gasification furnace moving bed area 21 and is used for receiving solid particles separated by the thermal cyclone separator 13; the raw material A inlet 6 is positioned at the junction of the gasifier upper free space zone 19 and the gasifier fluidization region 20; the raw material B inlet 18 is in the dome shape 3/20 of the upper free space zone 19 of the gasification furnace.

The high-temperature plasma heating gun 8 of the gasification furnace 7 is arranged at 1/2 of the gasification region 22 of the gasification furnace, the horizontal coaxial arrangement and the included angle with the horizontal direction are 25 degrees, and the number is 8.

The operating pressure of the gasification furnace 7 is 4MPa, and the temperature interval of the pyrolysis furnace 10 is 800 ℃; the temperature interval of the drying device 5 is 250 ℃. The high-temperature plasma heating gun 8 heats the gasifying agent to 4500 ℃, and the gasifying agent is CO₂Steam or mixed gas thereof, and the linear velocity of the gasifying agent is 150 m/s. The raw material A1 is biomass, and the average particle size range is 300 mu m; the raw material B9 is anthracite, the average grain diameter range is 800 mu m, and the feeding mass ratio of the raw material A inlet 6 to the raw material B inlet 18 is 0.2: 1. The temperature of the slag zone 23 of the gasification furnace is 1350 ℃, the solid content is 0.85, the core temperature of the gasification zone 22 of the gasification furnace is 1600 ℃, the solid content is 0.15, the temperature of the moving bed zone 21 of the gasification furnace is 825 ℃, the solid content is 0.62, the temperature of the fluidization zone 20 of the gasification furnace is 815 DEG CThe solid content is 0.35, the temperature of the free space zone 19 at the upper part of the gasification furnace is 720 ℃, and the solid content is 0.12.

Through detection, the dust content is 4.5%, the carbon conversion rate is 94.5%, the effective gas component of the gasifier synthetic gas is 70.5%, and the dioxin content is 0.27ng/Nm³The operation stability is greatly improved, and the residue is vitreous body, has stable chemical property and is environment-friendly.

It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not constitute any limitation to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. The invention can be modified, as prescribed, within the scope of the claims and without departing from the scope and spirit of the invention. Although the invention has been described herein with reference to particular means, materials and embodiments, the invention is not intended to be limited to the particulars disclosed herein, but rather extends to all other methods and applications having the same functionality.