An improved two-stage pulverized coal gasification burner

Abstract

The present invention discloses an improved two-stage coal powder gasification burner, which relates to the technical field of coal powder gasification; it comprises a burner body and a burner head installed on the burner body; the burner head is provided with a fly ash nozzle and a water vapor nozzle in sequence from the inside to the outside, and a quenching water nozzle is provided in the water vapor nozzle; the fly ash nozzle is connected to the central pipe outlet on the burner body; the water vapor nozzle is connected to the steam flow channel on the burner body, and a quenching water pipe connected to the quenching water nozzle is provided inside the steam flow channel. By providing a steam flow channel and a quenching water nozzle inside the steam flow channel to fully atomize the quenching water, which is used to cool the synthetic gas in the gasifier, the amount of coal fed into the two-stage coal powder burner is reduced, so as to reduce the coal powder consumption.

Description

Technical Field

[0001] The invention relates to the technical field of pulverized coal gasification, in particular to an improved two-stage pulverized coal gasification burner. Background Art

[0002] The gasifier is a two-stage dry coal powder furnace. Its process is that the coal powder and oxygen sprayed into the furnace through the first-stage burner undergo a partial oxidation reaction in the furnace. After the chemical reaction is balanced, the required carbon monoxide and hydrogen (synthesis gas) are produced. The synthesis gas produced by this device has a high temperature, which can reach 1600 degrees Celsius. Therefore, the waste heat recovery boiler after the gasifier cannot work at such a high temperature. Therefore, a two-stage coal powder burner is used to spray coal powder and steam through the second-stage coal powder burner. On the one hand, it participates in the partial oxidation reaction of the first-stage burner, and on the other hand, it can reduce the temperature of the synthesis gas, so that the synthesis gas can directly enter the waste heat boiler for heat recovery.

[0003] The function of the second-stage conversion burner currently used is to spray pulverized coal and supplementary steam into the designated area of ​​the gasifier for cooling the synthesis gas. In actual use, the utilization rate of pulverized coal is low, which directly affects the economic benefits of the operation of the entire device. Summary of the invention

[0004] The object of the present invention is to provide an improved two-stage pulverized coal gasification burner to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An improved two-stage pulverized coal gasification burner comprises a burner body and a burner head mounted on the burner body;

[0007] The burner head is provided with a fly ash nozzle and a water vapor nozzle in sequence from the outside, and a plurality of quenching water nozzles are provided in the water vapor nozzle;

[0008] The fly ash nozzle is connected to the central tube outlet on the burner body;

[0009] The water vapor nozzle is communicated with a steam flow channel on the burner body, and a quenching water pipe communicated with a quenching water nozzle is arranged inside the steam flow channel.

[0010] As a further solution of the present invention: the burner body includes a center tube, a first sleeve tube, a second sleeve tube, a fifth sleeve tube and an outer shell sleeve tube, which are arranged in sequence from the inside to the outside.

[0011] As a further solution of the present invention, the space between the first sleeve and the second sleeve constitutes a steam pipe.

[0012] As a further solution of the present invention: there are multiple quenching water pipes, which are arranged in an array outside the first sleeve and inside the second sleeve.

[0013] As a further solution of the present invention: a cooling channel is formed between the fifth sleeve and the outer shell sleeve.

[0014] As a further solution of the present invention: an air interlayer is provided between the first sleeve and the central tube, and an air interlayer is also provided between the second sleeve and the fifth sleeve.

[0015] As a further solution of the present invention: a cooling water inlet and a cooling water outlet are provided on the outer shell sleeve.

[0016] As a further solution of the present invention: the second sleeve is provided with a water vapor inlet connected to the steam pipe and a quenching water inlet connected to the quenching water pipe.

[0017] As a further solution of the present invention: a coil section is provided on the quenching water pipe (104), and the coil section is provided at the inlet of the water vapor inlet (106).

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By arranging a steam flow channel and a quenching water nozzle inside the steam flow channel to fully atomize the quenching water, the quenching water is used to cool the synthesis gas in the gasifier, and the amount of coal fed to the second-stage pulverized coal burner is reduced, so as to reduce the consumption of pulverized coal and improve economic benefits;

[0020] 2. An air layer is provided between the first casing and the central tube, and an air layer is also provided between the second casing and the fifth casing; the problem of different thermal expansion amounts between different casings is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the improved two-stage pulverized coal gasification burner.

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0023] In the figure: burner body -1, burner head -2, center tube -101, first sleeve -102, second sleeve -103, quenching water pipe -104, quenching water inlet -105, water vapor inlet -106, cooling water inlet -107, cooling water outlet -108, outer shell sleeve -109, guide sleeve -110, fifth sleeve -113, fly ash nozzle -221, quenching water nozzle -222, water vapor nozzle -223. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1

[0026] See also Figures 1-2 In Embodiment 1 of the present invention, an improved two-stage pulverized coal gasification burner comprises a burner body 1 and a burner head 2 mounted on the burner body 1;

[0027] The burner head 2 is provided with a fly ash nozzle 221 and a water vapor nozzle 223 in sequence, and a plurality of quenching water nozzles 222 are provided in the water vapor nozzle 223;

[0028] The fly ash nozzle 221 is connected to the outlet of the central tube 101 on the burner body 1;

[0029] The water vapor nozzle 223 is in communication with a steam flow channel on the burner body 1 , and a quenching water pipe 104 in communication with the quenching water nozzle 222 is provided inside the steam flow channel.

[0030] By arranging 104 inside the steam flow channel, the steam flow channel and the quenching water nozzle 222 are used to fully atomize the quenching water for cooling the synthesis gas in the gasifier, reducing the amount of coal fed to the second-stage pulverized coal burner, thereby reducing the pulverized coal consumption and improving economic benefits.

[0031] Example 2

[0032] See also Figures 1-2 The main difference between the embodiment 2 and the embodiment 1 is that the burner body 1 includes a central tube 101, a first sleeve 102, a second sleeve 103, a fifth sleeve 113 and an outer sleeve 109 which are arranged concentrically from the inside to the outside. The gap between the first sleeve 102 and the second sleeve 103 constitutes a steam pipeline.

[0033] There are multiple quenching water pipes 104 , which are arranged in an array outside the first sleeve 102 and inside the second sleeve 103 .

[0034] There are six quenching water pipes 104 .

[0035] A cooling channel is formed between the fifth sleeve 113 and the outer shell sleeve 109. The cooling channel is used to cool down the present invention and protect the present invention.

[0036] Since different temperature differences will lead to different thermal expansion amounts, an air layer is provided between the first sleeve 102 and the central tube 101, and an air layer is also provided between the second sleeve 103 and the fifth sleeve 113. The air layer is used for insulation to solve the problem of different thermal expansion between different sleeves.

[0037] The housing sleeve 109 is provided with a cooling water inlet 107 and a cooling water outlet 108 for providing flowing cooling water to the cooling channel.

[0038] The second sleeve 103 is provided with a steam inlet 106 communicating with the steam pipeline and a quenching water inlet 105 communicating with the quenching water pipe 104 .

[0039] The quenching water pipe 104 is provided with a coil section, and the coil section is arranged at the inlet of the water vapor inlet 106; the coil section is provided to release the temperature difference expansion stress of the quenching water pipe 104 caused by the temperature difference between the quenching water and the steam.

[0040] The burner body 1 further comprises a flange for installation, and the flange is arranged on the housing sleeve 109 .

[0041] A guide sleeve 110 is further provided between the outer casing sleeve 109 and the fifth sleeve 113. The guide sleeve 110 is provided to guide water in the cooling channel to improve the cooling effect. A connecting hole is provided on the guide sleeve 110 to connect the two separated cooling areas.

[0042] The working principle of the present invention is: by arranging 104 inside the steam flow channel, the steam flow channel and the quenching water nozzle 222 are used to fully atomize the quenching water, which is used to cool the synthesis gas in the gasifier, reduce the coal feeding amount of the second-stage pulverized coal burner, and achieve the goal of reducing pulverized coal consumption, thereby improving economic benefits; by arranging an air interlayer between the first sleeve 102 and the central tube 101, and also arranging an air interlayer between the second sleeve 103 and the fifth sleeve 113; the problem of different thermal expansion amounts between different sleeves is solved.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An improved two-stage pulverized coal gasification burner, comprising a burner body (1) and a burner head (2) mounted on the burner body (1); It is characterized in that The burner head (2) is provided with a fly ash nozzle (221) and a water vapor nozzle (223) in sequence from the inside to the outside, and a plurality of quenching water nozzles (222) are provided in the water vapor nozzle (223); The fly ash nozzle (221) is in communication with an outlet of a central tube (101) on the burner body (1); The water vapor nozzle (223) is in communication with a steam flow channel on the burner body (1); a quenching water pipe (104) in communication with a quenching water nozzle (222) is provided inside the steam flow channel; The burner body (1) comprises, from the inside to the outside, a central tube (101), a first sleeve (102), a second sleeve (103), a fifth sleeve (113), a flow guide sleeve (110) and an outer shell sleeve (109); The space between the first sleeve (102) and the second sleeve (103) constitutes a steam pipeline; The quenching water pipes (104) are multiple and arranged in an array outside the first sleeve (102) and inside the second sleeve (103); A cooling channel is formed between the fifth sleeve (113) and the outer shell sleeve (109).

2. The improved two-stage pulverized coal gasification burner according to claim 1 is characterized in that: An air interlayer is provided between the first sleeve (102) and the central tube (101), and an air interlayer is also provided between the second sleeve (103) and the fifth sleeve (113).

3. The improved two-stage pulverized coal gasification burner according to claim 2 is characterized in that: The outer shell sleeve (109) is provided with a cooling water inlet (107) and a cooling water outlet (108).

4. The improved two-stage pulverized coal gasification burner according to claim 1 is characterized in that: The second sleeve (103) is provided with a water vapor inlet (106) connected to the steam pipeline and a quenching water inlet (105) connected to the quenching water pipe (104).

5. The improved two-stage pulverized coal gasification burner according to claim 4 is characterized in that: The quenching water pipe (104) is provided with a coil section, and the coil section is arranged at the inlet of the water vapor inlet (106).

Images