Nozzle structure capable of generating rotational flow field and coal water slurry process burner adopting nozzle structure

Abstract

The invention discloses a nozzle structure capable of generating a rotational flow field and a coal water slurry process burner adopting the nozzle structure, the nozzle structure comprises a central oxygen nozzle, a coal water slurry nozzle and an epoxy nozzle, the outer side of the central oxygen nozzle is nested with the coal water slurry nozzle, the outer side of the coal water slurry nozzle is nested with the epoxy nozzle, and the epoxy nozzle is nested with the central oxygen nozzle. At least three spiral flow guide structures which are uniformly distributed along the circumference are arranged in a conical annular gap formed between the coal water slurry nozzle and the epoxy nozzle, and the nozzle structure is suitable for any one of a three-channel coal water slurry process burner, a four-channel coal water slurry process burner and a multifunctional combined coal water slurry process burner. According to the overhead single-nozzle gasification furnace, reactants in the overhead single-nozzle gasification furnace can form a spiral descending flight path, and the retention time of the reactants is prolonged, so that effective gas lifting and carbon conversion rate improvement are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of coal chemical industry, in particular to the technical field of a nozzle structure capable of generating a swirl flow field and a water-coal slurry process burner using the nozzle structure. Background Art

[0002] Pressurized entrained flow gasification technology is known as green coal development and utilization technology. According to the form of raw coal, pressurized entrained flow gasification technology can be divided into pulverized coal pressurized entrained flow gasification technology and water-coal slurry pressurized entrained flow gasification technology; according to the form of gasifier, it can be divided into regenerative gasifier and water-cooled wall gasifier. Pulverized coal pressurized entrained flow gasification technology is divided into Shell technology and China Aerospace gasification technology, etc. Water-coal slurry pressurized entrained flow gasification technology is further divided into GE top single nozzle gasification technology, East China University of Science and Technology opposed four-nozzle gasification technology and Tsinghua University water-cooled wall gasification technology.

[0003] Among the above-mentioned gasification technologies, the order of effective gas ratio and carbon conversion rate is: pulverized coal gasification technology > opposed four-nozzle gasification technology > Tsinghua water-cooled wall ≥ GE top-mounted single-nozzle gasification technology. The effective gas of pulverized coal gasification technology is as high as 92% (H2 35% + CO 68% + CO27%), and the carbon conversion rate is ≥99%; the effective gas of opposed four-nozzle technology is 84% ​​(H2 35% + CO 49% + CO216%), and the carbon conversion rate is ≥99%; the effective gas of Tsinghua University water-cooled wall gasification technology and GE gasification technology are both 80~81% (H2 35% + CO 45~46% + CO219~20%), and the carbon conversion rate is ≥99%. However, the actual effective gas and carbon conversion rates are closely related to the gasifier design and coal quality and type of each project, and are not completely consistent.

[0004] The H2 content in the effective gas mainly depends on the changes in the component content in the reactants. The water content in the reactants is basically stable. The components that change are mainly CO and CO2, that is, whether CO2 is fully converted into CO. The direct factors affecting the conversion rate are the flight trajectory and residence time of the reactants in the gasifier. If the residence time is long enough, the CO2 generated by combustion will have sufficient time and energy to be converted into CO. Factors affecting the residence time of the reactants include the particle size and distribution of the raw coal powder, the gasification process, the atomization size of the process burner, the diameter and length of the gasifier, the size of the slag mouth, whether the exhaust channel is unobstructed, etc.

[0005] The pulverized coal gasification technology uses a cyclone designed at the nozzle of the powder process burner, and the pulverized coal particles spirally fly down in the gasifier through the cyclone; in the opposed four-nozzle gasification technology, after the water-coal slurry is ejected from the process burner, it first flies horizontally and collides in the center of the gasifier before flying in all directions. Since the axes of the opposed nozzles are staggered at a certain angle, a rotating stirring effect is formed, and the reactants will also produce rotating flight. Therefore, the effective gas of the pulverized coal gasification technology and the opposed four-nozzle gasification technology is higher; in the top-mounted single-nozzle gasification technology, whether it is GE water-coal slurry gasification technology or Tsinghua furnace water-cooled wall gasification technology, the reactants are ejected from the top downward. Although there is reflux in the gasifier, the central area still flies out of the gasifier quickly. The reaction time depends on the length of the gasifier.

[0006] After the project is put into production, the diameter and length of the top-mounted single-nozzle gasifier are fixed and cannot be changed. If the carbon conversion rate is to be further improved, the main adjustment is to adjust the particle size and distribution of the raw coal powder, the characteristic size of the process burner and the slag mouth size. However, if the size design of the gasifier is unreasonable, the above adjustment effect will be limited. Therefore, under the development requirements of energy conservation and emission reduction and the market competition environment with strict cost control, how to further improve the effective gas conversion and carbon conversion rate of the currently operating top-mounted single-nozzle pressurized gasifier is an urgent need for the development of the industry. Summary of the Invention

[0007] The purpose of the present invention is to solve the problems in the prior art. In order to meet the demand for improving the effective gas component and carbon conversion rate of the currently built and operated top-mounted single-nozzle water-coal slurry gasifier, a nozzle structure that can generate a swirl flow field and a water-coal slurry process burner using this nozzle structure are proposed. The reactants in the top-mounted single-nozzle gasifier can form a spiral downward flight trajectory, prolong the residence time of the reactants, thereby achieving effective gas improvement and improved carbon conversion rate.

[0008] To achieve the above-mentioned objectives, the present invention proposes a nozzle structure that can generate a swirl flow field and a water-coal slurry process burner using the nozzle structure, including a central oxygen nozzle, a water-coal slurry nozzle and an epoxy nozzle. The water-coal slurry nozzle is nested on the outside of the central oxygen nozzle, and the epoxy nozzle is nested on the outside of the water-coal slurry nozzle. At least three spiral guide structures uniformly distributed along the circumference are arranged in the conical annular gap formed between the water-coal slurry nozzle and the epoxy nozzle. The nozzle structure is suitable for any one of a three-channel water-coal slurry process burner, a four-channel water-coal slurry process burner and a multi-functional combined water-coal slurry process burner.

[0009] Preferably, the spiral guide structure is an outer oxygen annular gap swirl plate with a spiral structure, and the conical annular gap formed between the outer side surface of the water-coal slurry nozzle and the inner side surface of the epoxy nozzle is provided with any number of outer oxygen annular gap swirl plates, including three outer oxygen annular gap swirl plates, four outer oxygen annular gap swirl plates, five outer oxygen annular gap swirl plates, six outer oxygen annular gap swirl plates, eight outer oxygen annular gap swirl plates or more outer oxygen annular gap swirl plates.

[0010] Preferably, the direction of the spiral line of the spiral guide structure complies with either the right-hand rule or the left-hand rule.

[0011] Preferably, the inner layer of the three-channel water-coal slurry process burner is a central oxygen nozzle and a central oxygen pipe connected thereto, and the other end of the central oxygen pipe is connected to an external central oxygen connecting pipe. The middle layer of the three-channel water-coal slurry process burner is a water-coal slurry nozzle and a water-coal slurry pipe connected thereto, and the other end of the water-coal slurry pipe is connected to an external water-coal slurry connecting pipe. The outer layer of the three-channel water-coal slurry process burner is an epoxy nozzle and an external oxygen pipe connected thereto, and the other end of the external oxygen pipe is connected to an external external epoxy connecting pipe. The epoxy nozzle end of the three-channel water-coal slurry process burner is provided with a cooling water chamber integrated therewith and connected to an external circulating water device, and the cooling water chamber is any one of a jacketed water chamber and a coil water chamber.

[0012] Preferably, the inner layer of the four-channel water-coal slurry process burner is a central oxygen nozzle and a central oxygen pipe connected thereto, and the other end of the central oxygen pipe is connected to an external central oxygen connecting pipe. The middle layer of the four-channel water-coal slurry process burner is a water-coal slurry nozzle and a water-coal slurry pipe connected thereto, and the other end of the water-coal slurry pipe is connected to an external water-coal slurry connecting pipe. The sub-outer layer of the four-channel water-coal slurry process burner is an epoxy nozzle and an external oxygen pipe connected thereto, and the other end of the external oxygen pipe is connected to an external external epoxy connecting pipe. The outermost layer of the four-channel water-coal slurry process burner is an outer ring material nozzle and a fourth material pipe connected thereto, and the other end of the fourth material pipe is connected to an external fourth material channel. The end of the outer ring material nozzle of the four-channel water-coal slurry process burner is provided with a cooling water chamber integrated therewith and connected to an external circulating water device, and the cooling water chamber is any one of a jacketed water chamber and a coil water chamber.

[0013] Preferably, the innermost layer of the multifunctional combined water-coal slurry process burner is an electric ignition rod, the first internal channel of the multifunctional combined water-coal slurry process burner is an ignition gas nozzle wrapped around the electric ignition rod and an ignition gas pipe connected thereto, the other end of the ignition gas pipe is connected to an external ignition gas connecting pipe, the second channel of the multifunctional combined water-coal slurry process burner is a central oxygen nozzle wrapped around the ignition gas nozzle and the ignition gas pipe and a central oxygen pipe connected thereto, the other end of the central oxygen pipe is connected to an external central oxygen connecting pipe, the third channel of the multifunctional combined water-coal slurry process burner is a water-coal slurry nozzle wrapped around the central oxygen nozzle and the central oxygen pipe and a water-coal slurry pipe connected thereto, the water-coal slurry pipe The other end is connected to the external water-coal slurry connecting pipe, the fourth layer channel of the multifunctional combined water-coal slurry process burner is the epoxy nozzle that wraps the water-coal slurry nozzle and the water-coal slurry pipe and the external oxygen pipe connected thereto, the other end of the external oxygen pipe is connected to the external external epoxy connecting pipe, the fifth layer channel of the multifunctional combined water-coal slurry process burner is the preheating gas nozzle that wraps the epoxy nozzle and the external oxygen pipe and the preheating gas pipe connected thereto, the other end of the preheating gas pipe is connected to the external preheating gas connecting pipe, the preheating gas nozzle end of the multifunctional combined water-coal slurry process burner is provided with a cooling water chamber that is integrated with it and is connected to the external circulating water device, and the cooling water chamber is any one of a jacketed water chamber and a coil type water chamber.

[0014] Beneficial effects of the present invention: The present invention can make the reactants in the overhead single-nozzle gasifier form a spiral downward flight trajectory, prolong the residence time of the reactants, thereby achieving effective gas lifting and improving the carbon conversion rate. The above-mentioned three-channel and four-channel water-coal slurry process burners can be applied to heat storage type overhead single-nozzle water-coal slurry pressurized fluidized flow gasifiers, and the above-mentioned multi-channel multifunctional water-coal slurry process burners can be applied to water-cooled wall water-coal slurry pressurized fluidized flow gasifiers.

[0015] The features and advantages of the present invention will be described in detail through embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a nozzle structure capable of generating a swirl flow field and a three-channel water-coal slurry process burner and a three-channel coil-type process burner of a water-coal slurry process burner using the nozzle structure according to the present invention; Figure 2 This is an enlarged structural schematic diagram of a nozzle structure capable of generating a swirl flow field and a three-channel water-coal slurry process burner employing the nozzle structure; Figure 3 This is a schematic diagram of the outer oxygen annular gap swirl plate structure of a three-channel water-coal slurry process burner and a three-channel coil-type process burner of a water-coal slurry process burner using the nozzle structure of the present invention; Figure 4 It is a schematic structural diagram of a nozzle structure capable of generating a swirl flow field and a three-channel jacketed process burner of a water-coal slurry process burner using the nozzle structure according to the present invention; Figure 5 It is an enlarged structural schematic diagram of a nozzle structure capable of generating a swirl flow field and a three-channel jacketed process burner nozzle of a water-coal slurry process burner using the nozzle structure according to the present invention; Figure 6 This is a schematic diagram of the outer oxygen annular gap swirl plate structure of a three-channel water-coal slurry process burner and a three-channel jacketed process burner of a water-coal slurry process burner using the nozzle structure of the present invention; Figure 7 This is a schematic structural diagram of a nozzle structure capable of generating a swirl flow field and a four-channel water-coal slurry process burner and a four-channel coil-type process burner of a water-coal slurry process burner using the nozzle structure according to the present invention; Figure 8 This is an enlarged structural schematic diagram of a nozzle structure capable of generating a swirl flow field and a four-channel water-coal slurry process burner nozzle of a four-channel coil-type process burner using the nozzle structure of the present invention; Figure 9 This is a schematic diagram of the outer oxygen annular gap swirl plate structure of a nozzle structure capable of generating a swirl flow field and a four-channel water-coal slurry process burner and a four-channel coil-type process burner using the nozzle structure of the present invention; Figure 10 This is a schematic structural diagram of a nozzle structure capable of generating a swirl flow field and a four-channel jacketed process burner of a water-coal slurry process burner using the nozzle structure according to the present invention; Figure 11 It is an enlarged structural schematic diagram of a nozzle structure capable of generating a swirl flow field and a four-channel jacketed process burner nozzle of a water-coal slurry process burner using the nozzle structure according to the present invention; Figure 12 This is a schematic diagram of the outer oxygen annular gap swirl plate structure of a nozzle structure capable of generating a swirl flow field and a four-channel water-coal slurry process burner and a four-channel jacketed process burner using the nozzle structure of the present invention; Figure 13 This is a schematic structural diagram of a multi-channel jacketed process burner of a multifunctional combined water-coal slurry process burner that can generate a swirl flow field and a water-coal slurry process burner using the nozzle structure of the present invention; Figure 14This is an enlarged structural schematic diagram of a nozzle structure capable of generating a swirl flow field and a multi-functional combined coal-water slurry process burner using the nozzle structure, a multi-channel jacketed process burner nozzle of the present invention; Figure 15 The present invention is a nozzle structure capable of generating a swirl flow field and a schematic diagram of the outer oxygen annular gap swirl plate structure of a multifunctional combined water-coal slurry process burner of a multi-channel jacketed process burner using the nozzle structure.

[0017] In the figure: 1-central oxygen connecting pipe, 2-central oxygen pipe, 3-water-coal slurry connecting pipe, 4-water-coal slurry pipe, 5-outer epoxy connecting pipe, 6-outer oxygen pipe, 7-burner circulating cooling water connecting pipe, 8-circulating water coil, 9-central oxygen nozzle, 10-water-coal slurry nozzle, 11-epoxy nozzle, 12-conical annular gap, 13-outer oxygen annular gap swirl plate, 14-jacketed water cavity, 15-fourth material channel, 16-fourth material pipe, 17-outer ring material nozzle, 18-electric ignition rod, 19-ignition gas nozzle, 20-ignition gas connecting pipe, 21-ignition gas pipe, 22-preheating gas nozzle, 23-preheating gas pipe, 24-preheating gas connecting pipe, 25-electric igniter power supply. DETAILED DESCRIPTION

[0018] See Figure 1 The present invention provides a nozzle structure capable of generating a swirl flow field and a water-coal slurry process burner using the nozzle structure, comprising a central oxygen nozzle, a water-coal slurry nozzle and an epoxy nozzle, wherein a water-coal slurry nozzle is nested on the outside of the central oxygen nozzle, an epoxy nozzle is nested on the outside of the water-coal slurry nozzle, and at least three spiral guide structures uniformly distributed along the circumference are arranged in the conical annular gap formed between the water-coal slurry nozzle and the epoxy nozzle. The nozzle structure is suitable for any one of a three-channel water-coal slurry process burner, a four-channel water-coal slurry process burner and a multifunctional combined water-coal slurry process burner, and the spiral line direction of the spiral guide structure conforms to any one of the right-hand rule and the left-hand rule.

[0019] Implementation See Figure 1 、 Figure 2 and Figure 3The inner layer of the three-channel water-coal slurry process burner is a central oxygen nozzle and a central oxygen pipe connected to it, and the other end of the central oxygen pipe is connected to the external central oxygen connecting pipe. The middle layer of the three-channel water-coal slurry process burner is a water-coal slurry nozzle and a water-coal slurry pipe connected to it, and the other end of the water-coal slurry pipe is connected to the external water-coal slurry connecting pipe. The outer layer of the three-channel water-coal slurry process burner is an epoxy nozzle and an external oxygen pipe connected to it, and the other end of the external oxygen pipe is connected to the external external epoxy connecting pipe. The epoxy nozzle end of the three-channel water-coal slurry process burner is provided with a cooling water chamber integrated with it and connected to the external circulating water device. The cooling water chamber of the three-channel water-coal slurry process burner is a coil-type water chamber, and three spirally evenly distributed outer oxygen annular gap swirl plates are arranged in the conical annular gap formed between the outer side surface of the water-coal slurry nozzle and the inner side surface of the epoxy nozzle.

[0020] Example 2 See Figure 4 、 Figure 5 and Figure 6 The inner layer of the three-channel water-coal slurry process burner is a central oxygen nozzle and a central oxygen pipe connected thereto, and the other end of the central oxygen pipe is connected to an external central oxygen connecting pipe. The middle layer of the three-channel water-coal slurry process burner is a water-coal slurry nozzle and a water-coal slurry pipe connected thereto, and the other end of the water-coal slurry pipe is connected to an external water-coal slurry connecting pipe. The outer layer of the three-channel water-coal slurry process burner is an epoxy nozzle and an external oxygen pipe connected thereto, and the other end of the external oxygen pipe is connected to an external external epoxy connecting pipe. The epoxy nozzle end of the three-channel water-coal slurry process burner is provided with a cooling water chamber integrated therewith and connected to an external circulating water device. The cooling water chamber of the three-channel water-coal slurry process burner is a jacketed water chamber, and four spirally evenly distributed outer oxygen annular gap swirl plates are provided in the conical annular gap formed between the outer side surface of the water-coal slurry nozzle and the inner side surface of the epoxy nozzle.

[0021] Example 3 See Figure 7 、 Figure 8 and Figure 9The inner layer of the four-channel water-coal slurry process burner is a central oxygen nozzle and a central oxygen pipe connected to it, the other end of the central oxygen pipe is connected to the external central oxygen connecting pipe, the middle layer of the four-channel water-coal slurry process burner is a water-coal slurry nozzle and a water-coal slurry pipe connected to it, the other end of the water-coal slurry pipe is connected to the external water-coal slurry connecting pipe, the sub-outer layer of the four-channel water-coal slurry process burner is an epoxy nozzle and an outer oxygen pipe connected to it, the other end of the outer oxygen pipe is connected to the external outer epoxy connecting pipe, the outermost layer of the four-channel water-coal slurry process burner is an outer ring material nozzle and a fourth material pipe connected to it, the other end of the fourth material pipe is connected to the external fourth material channel, the outer ring material nozzle end of the four-channel water-coal slurry process burner is provided with a cooling water chamber integrated with it and connected to the external circulating water device, the cooling water chamber of the four-channel water-coal slurry process burner is a coil water chamber, and five spirally evenly distributed outer oxygen annular gap swirl plates are arranged in the conical annular gap formed between the outer side surface of the water-coal slurry nozzle and the inner side surface of the epoxy nozzle.

[0022] Example 4 See Figure 10 、 Figure 11 and Figure 12 The inner layer of the four-channel water-coal slurry process burner is a central oxygen nozzle and a central oxygen pipe connected to it, the other end of the central oxygen pipe is connected to the external central oxygen connecting pipe, the middle layer of the four-channel water-coal slurry process burner is a water-coal slurry nozzle and a water-coal slurry pipe connected to it, the other end of the water-coal slurry pipe is connected to the external water-coal slurry connecting pipe, the sub-outer layer of the four-channel water-coal slurry process burner is an epoxy nozzle and an outer oxygen pipe connected to it, the other end of the outer oxygen pipe is connected to the external outer epoxy connecting pipe, the outermost layer of the four-channel water-coal slurry process burner is an outer ring material nozzle and a fourth material pipe connected to it, the other end of the fourth material pipe is connected to the external fourth material channel, the outer ring material nozzle end of the four-channel water-coal slurry process burner is provided with a cooling water chamber integrated with it and connected to the external circulating water device, the cooling water chamber of the four-channel water-coal slurry process burner is a jacketed water chamber, and six spirally evenly distributed outer oxygen annular gap swirl plates are arranged in the conical annular gap formed between the outer side surface of the water-coal slurry nozzle and the inner side surface of the epoxy nozzle.

[0023] Example 5 See Figure 13 、 Figure 14 and Figure 15The innermost layer of the multifunctional combined water-coal slurry process burner is an electric ignition rod, and the first internal channel of the multifunctional combined water-coal slurry process burner is an ignition gas nozzle wrapped with the electric ignition rod and an ignition gas pipe connected thereto, and the other end of the ignition gas pipe is connected to an external ignition gas connecting pipe, and the second channel of the multifunctional combined water-coal slurry process burner is a central oxygen nozzle wrapped with the ignition gas nozzle and the ignition gas pipe and a central oxygen pipe connected thereto, and the other end of the central oxygen pipe is connected to an external central oxygen connecting pipe, and the third channel of the multifunctional combined water-coal slurry process burner is a water-coal slurry nozzle wrapped with the central oxygen nozzle and the central oxygen pipe and a water-coal slurry pipe connected thereto, and the other end of the water-coal slurry pipe is connected to an external water-coal slurry connecting pipe, The fourth layer channel of the process burner is the epoxy nozzle that wraps the water-coal slurry nozzle and the water-coal slurry pipe and the external oxygen pipe connected to it. The other end of the external oxygen pipe is connected to the external external epoxy connecting pipe. The fifth layer channel of the multifunctional combined water-coal slurry process burner is the preheating gas nozzle that wraps the epoxy nozzle and the external oxygen pipe and the preheating gas pipe connected to it. The other end of the preheating gas pipe is connected to the external preheating gas connecting pipe. The end of the preheating gas nozzle of the multifunctional combined water-coal slurry process burner is provided with a cooling water chamber that is integrated with it and connected to the external circulating water device. The cooling water chamber of the multifunctional combined water-coal slurry process burner is a jacketed water chamber. Eight spirally evenly distributed external oxygen annular gap swirl plates are arranged in the conical annular gap formed between the outer side surface of the water-coal slurry nozzle and the inner side surface of the epoxy nozzle.

[0024] The present invention can make the reactants in the top-mounted single-nozzle gasifier form a spiral downward flight trajectory, prolong the residence time of the reactants, thereby achieving effective gas lifting and improving the carbon conversion rate. The above-mentioned three-channel and four-channel water-coal slurry process burners can be applied to the heat storage type top-mounted single-nozzle water-coal slurry pressurized fluidized flow gasifier, and the above-mentioned multi-channel multifunctional water-coal slurry process burner can be applied to the water-cooled wall water-coal slurry pressurized fluidized flow gasifier.

[0025] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A nozzle structure capable of generating a swirl flow field and a coal-water slurry process burner using the nozzle structure, characterized in that: It includes a central oxygen nozzle, a water-coal slurry nozzle and an epoxy nozzle. The water-coal slurry nozzle is nested on the outside of the central oxygen nozzle, and the epoxy nozzle is nested on the outside of the water-coal slurry nozzle. At least three spiral guide structures evenly distributed along the circumference are arranged in the conical annular gap formed between the water-coal slurry nozzle and the epoxy nozzle. The nozzle structure is suitable for any one of the three-channel water-coal slurry process burners, the four-channel water-coal slurry process burners and the multi-functional combined water-coal slurry process burners.

2. A nozzle structure capable of generating a swirl flow field and a coal-water slurry process burner using the nozzle structure as claimed in claim 1, characterized in that: The spiral guide structure is an outer oxygen annular gap swirl plate with a spiral structure, and the conical annular gap formed between the outer side surface of the water-coal slurry nozzle and the inner side surface of the epoxy nozzle is provided with any number of outer oxygen annular gap swirl plates, including three outer oxygen annular gap swirl plates, four outer oxygen annular gap swirl plates, five outer oxygen annular gap swirl plates, six outer oxygen annular gap swirl plates, eight outer oxygen annular gap swirl plates or more outer oxygen annular gap swirl plates.

3. The nozzle structure capable of generating a swirl flow field and the water-coal slurry process burner using the nozzle structure as claimed in claim 1, characterized in that: The direction of the spiral line of the spiral guide structure complies with either the right-hand rule or the left-hand rule.

4. The nozzle structure capable of generating a swirl flow field and the water-coal slurry process burner using the nozzle structure as claimed in claim 1, characterized in that: The inner layer of the three-channel water-coal slurry process burner is a central oxygen nozzle and a central oxygen pipe connected thereto, and the other end of the central oxygen pipe is connected to an external central oxygen connecting pipe. The middle layer of the three-channel water-coal slurry process burner is a water-coal slurry nozzle and a water-coal slurry pipe connected thereto, and the other end of the water-coal slurry pipe is connected to an external water-coal slurry connecting pipe. The outer layer of the three-channel water-coal slurry process burner is an epoxy nozzle and an external oxygen pipe connected thereto, and the other end of the external oxygen pipe is connected to an external external epoxy connecting pipe. The epoxy nozzle end of the three-channel water-coal slurry process burner is provided with a cooling water chamber integrated therewith and connected to an external circulating water device, and the cooling water chamber is any one of a jacketed water chamber and a coil water chamber.

5. The nozzle structure capable of generating a swirl flow field and the water-coal slurry process burner using the nozzle structure as claimed in claim 1, characterized in that: The inner layer of the four-channel water-coal slurry process burner is a central oxygen nozzle and a central oxygen pipe connected to it, and the other end of the central oxygen pipe is connected to the external central oxygen connecting pipe. The middle layer of the four-channel water-coal slurry process burner is a water-coal slurry nozzle and a water-coal slurry pipe connected to it, and the other end of the water-coal slurry pipe is connected to the external water-coal slurry connecting pipe. The sub-outer layer of the four-channel water-coal slurry process burner is an epoxy nozzle and an external oxygen pipe connected to it, and the other end of the external oxygen pipe is connected to the external external epoxy connecting pipe. The outermost layer of the four-channel water-coal slurry process burner is an outer ring material nozzle and a fourth material pipe connected to it, and the other end of the fourth material pipe is connected to the external fourth material channel. The end of the outer ring material nozzle of the four-channel water-coal slurry process burner is provided with a cooling water chamber integrated with it and connected to the external circulating water device. The cooling water chamber is any one of a jacketed water chamber and a coil water chamber.

6. The nozzle structure capable of generating a swirl flow field and the water-coal slurry process burner using the nozzle structure as claimed in claim 1, characterized in that: The innermost layer of the multifunctional combined water-coal slurry process burner is an electric ignition rod, the first internal channel of the multifunctional combined water-coal slurry process burner is an ignition gas nozzle wrapped around the electric ignition rod and an ignition gas pipe connected thereto, the other end of the ignition gas pipe is connected to an external ignition gas connecting pipe, the second channel of the multifunctional combined water-coal slurry process burner is a central oxygen nozzle wrapped around the ignition gas nozzle and the ignition gas pipe and a central oxygen pipe connected thereto, the other end of the central oxygen pipe is connected to an external central oxygen connecting pipe, the third channel of the multifunctional combined water-coal slurry process burner is a water-coal slurry nozzle wrapped around the central oxygen nozzle and the central oxygen pipe and a water-coal slurry pipe connected thereto, the other end of the water-coal slurry pipe is connected thereto. One end is connected to the external water-coal slurry connecting pipe, the fourth layer channel of the multifunctional combined water-coal slurry process burner is the epoxy nozzle that wraps the water-coal slurry nozzle and the water-coal slurry pipe and the external oxygen pipe connected thereto, and the other end of the external oxygen pipe is connected to the external external epoxy connecting pipe, the fifth layer channel of the multifunctional combined water-coal slurry process burner is the preheating gas nozzle that wraps the epoxy nozzle and the external oxygen pipe and the preheating gas pipe connected thereto, and the other end of the preheating gas pipe is connected to the external preheating gas connecting pipe, the preheating gas nozzle end of the multifunctional combined water-coal slurry process burner is provided with a cooling water chamber that is integrated with it and connected to the external circulating water device, and the cooling water chamber is any one of a jacketed water chamber and a coil type water chamber.

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