Kiln head coal injection duct

Abstract

The utility model relates to the technical field of kiln head coal injection, in particular to a kiln head coal injection duct. According to the technical scheme, the device comprises a pulverized coal pipe, a mixing pipe, a mounting block and a rotating shaft, the mixing pipe is mounted on the pulverized coal pipe through a flange plate, a fixing pipe is mounted on the mixing pipe through a flange plate, and a sleeve is mounted on the mixing pipe through a flange plate; one end of the mixing pipe is embedded into the gas inlet pipe, and a shunt pipe is fixedly embedded into one end, deviating from the gas inlet pipe, of the mixing pipe; fan blades are welded to the two ends of the rotating shaft, and the fan blades are slidably sleeved with a shell; mounting blocks and fixing frames are welded to the two ends of the inner wall of the sleeve, and spring dampers are mounted on the fixing frames through second supporting rods; a connecting shaft is welded in the mounting block, a baffle is connected to the connecting shaft in a sleeving mode, the mixing pipe communicates with the pulverized coal pipe, and the fixing pipe communicates with the mixing pipe. According to the utility model, coal injection of the kiln head is met, feeding buffering can be carried out on pulverized coal during coal injection, and the pulverized coal is scattered to prevent the blades from being abraded too fast.

Description

Technical Field

[0001] The utility model relates to the technical field of kiln head coal injection, in particular to a kiln head coal injection pipe. Background Art

[0002] Coal injection pipes are widely used in rotary kiln equipment and are also very important. They are mainly used to deliver coal and air to the kiln head of the rotary kiln. The role they can play is to first reduce energy consumption and increase calcination output.

[0003] During the use of the existing rotary kiln head coal injection pipe, the coal-air mixture is usually directly sprayed into the kiln head, causing the coal powder to be relatively concentrated and directly impact and fall, which can easily cause pipe wear. Therefore, it needs to be broken up and improved, and the wear of the breaking blades must be prevented during the breaking up to avoid rapid wear of the pipe affecting its use. Utility Model Content

[0004] The utility model aims to provide a kiln head coal injection pipe to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a kiln head coal injection pipe, including a pulverized coal pipe, a mixing pipe, a mounting block and a rotating shaft,

[0006] A mixing pipe is installed on the pulverized coal pipe through a flange, a fixing pipe is installed on the mixing pipe through a flange, and a sleeve is installed on the mixing pipe through a flange;

[0007] One end of the mixing tube is embedded in the air intake pipe, and the end of the mixing tube away from the air intake pipe is embedded and fixed with a diverter pipe;

[0008] Both ends of the rotating shaft are welded with fan blades, and a shell is slidably sleeved on the fan blades;

[0009] Both ends of the inner wall of the sleeve are welded with mounting blocks and fixing frames, and a spring damper is installed on the fixing frame through a second support rod;

[0010] A connecting shaft is welded inside the installation block, and a baffle is sleeved on the connecting shaft.

[0011] Preferably, the mixing tube is connected to the pulverized coal tube, the fixed tube is connected to the mixing tube, and the mixing tube is connected to the casing. After the pulverized coal to be used is injected through the casing, the pulverized coal is injected into the kiln head through the fixed tube, the mixing tube and the pulverized coal tube for use.

[0012] Preferably, an air duct is embedded and fixed on the side end face of the pulverized coal pipe, and the air duct is in gas communication with the pulverized coal pipe. The air duct can be connected to the cement kiln preheater exhaust pipe, so that the heat-containing gas from the kiln body after treatment and recovery enters the mixing pipe and reaches the fixed pipe for use, thereby preheating the pulverized coal.

[0013] Preferably, the air inlet pipe is in gas communication with the mixing pipe, and a valve is installed on the air inlet pipe through a flange. The air inlet pipe is in gas communication with the mixing pipe, so that when personnel inject the pulverized coal into the mixing pipe, they can inject the pulverized coal into the mixing pipe through the high-pressure gas connected to the air inlet pipe.

[0014] Preferably, the top and bottom surfaces of the housing are both threadedly mounted with bolts, and the bolts are threadedly mounted in the fan blades. The housing can be mounted on the fan blades by the bolts, so that the housing can protect the outer surface of the fan blades.

[0015] Preferably, the bottom end surface of the baffle is welded with support rod 1, and support rod 1 is slidably sleeved in support rod 2, and the bottom end surface of support rod 1 is installed on the spring damper. By installing the bottom end surface of support rod 1 on the spring damper and slidingly sleeved in support rod 2, the position can be limited to prevent deviation, so that the injection of coal powder into the casing can be limited by the baffle to prevent the direct fall of coal powder from causing large grinding of the pipeline and internal equipment, and the impact force of the coal powder when impacting the baffle can be buffered by the spring damper.

[0016] Preferably, a fixing block is provided on the bottom end surface of the rotating shaft, and the fixing block is installed in the fixing tube through a bracket. The rotating shaft can be installed and supported by the fixing block and the bracket.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] 1. The utility model provides a sleeve, and when personnel spray coal on the kiln head, they can install the coal powder pipe on the kiln head. After installation, the bottom end face of the support rod 1 is installed on the spring damper and slidably sleeved in the support rod 2 to limit the displacement, so that the coal powder injected into the sleeve can be limited by the baffle to avoid the direct fall of the coal powder and cause greater grinding of the pipeline and internal equipment. When the coal powder impacts the baffle for buffering, the impact force can be buffered by the spring damper, so that the coal feeding can be improved calmly.

[0019] 2. The utility model sets a fixed pipe, and when personnel spray coal on the kiln head, the air inlet pipe is connected with the mixing pipe gas, so that when personnel spray coal powder, the personnel can inject high-pressure gas into the mixing pipe through the air inlet pipe connected to an external high-pressure fan, and the coal powder is sprayed through the high-pressure gas. When the gas is injected, the coal powder and the gas enter the fixed pipe to drive the fan blades to rotate, and the coal powder can be dispersed to avoid coal powder agglomeration. The shell can be installed on the fan blades by bolts, so that the shell can protect the outer surface of the fan blade to prevent the blades of the fan blades from being damaged by long-term contact with coal powder, thereby meeting the use of coal spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a schematic diagram of the main internal structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the main appearance structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the casing of the utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the fixed pipe of the utility model.

[0024] In the figure: 1. pulverized coal pipe; 2. air intake pipe; 3. casing; 4. diverter pipe; 5. fixed pipe; 6. mixing pipe; 7. air duct; 8. fixing frame; 9. connecting shaft; 10. mounting block; 11. baffle; 12. support rod 1; 13. support rod 2; 14. spring damper; 15. fixing block; 16. bracket; 17. bolt; 18. fan blade; 19. rotating shaft; 20. casing. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1

[0027] like Figure 1-4 As shown, the utility model provides a kiln head coal injection pipe, comprising a pulverized coal pipe 1, a mixing pipe 6, a mounting block 10 and a rotating shaft 19.

[0028] A mixing pipe 6 is installed on the pulverized coal pipe 1 through a flange, a fixing pipe 5 is installed on the mixing pipe 6 through a flange, and a sleeve 3 is installed on the mixing pipe 6 through a flange;

[0029] One end of the mixing tube 6 is embedded in the air intake pipe 2, and the end of the mixing tube 6 facing away from the air intake pipe 2 is embedded and fixed with the diverter pipe 4;

[0030] The two ends of the rotating shaft 19 are welded with fan blades 18, and the fan blades 18 are slidably sleeved with a housing 20;

[0031] Both ends of the inner wall of the sleeve 3 are welded with mounting blocks 10 and a fixing frame 8, and a spring damper 14 is installed on the fixing frame 8 through a supporting rod 2 13;

[0032] A connecting shaft 9 is welded inside the mounting block 10 , and a baffle 11 is sleeved on the connecting shaft 9 .

[0033] The mixing tube 6 is connected to the pulverized coal tube 1, and the fixed tube 5 is connected to the mixing tube 6, and the mixing tube 6 is connected to the sleeve 3. After the required pulverized coal is injected through the sleeve 3, the pulverized coal is injected into the kiln head through the fixed tube 5, the mixing tube 6 and the pulverized coal tube 1 for use.

[0034] The air inlet pipe 2 is connected to the mixing pipe 6 by gas, and a valve is installed on the air inlet pipe 2 through a flange. The air inlet pipe 2 is connected to the mixing pipe 6 by gas, so that when personnel are spraying coal powder, they can inject high-pressure gas into the mixing pipe 6 through an external high-pressure fan of the air inlet pipe 2, and the coal powder is sprayed by the high-pressure gas, and the closing and opening of the pipeline can be controlled by the valve when the gas enters.

[0035] A support rod 12 is welded to the bottom end surface of the baffle 11, and the support rod 12 is slidably sleeved in the support rod 2 13. The bottom end surface of the support rod 12 is installed on the spring damper 14. The bottom end surface of the support rod 12 is installed on the spring damper 14 and slidably sleeved in the support rod 2 13 to limit the displacement, so that the coal powder injected into the sleeve 3 can be limited by the baffle 11 to avoid the direct fall of the coal powder causing large grinding of the pipeline and internal equipment, and the impact force of the coal powder impacting the baffle 11 can be buffered by the spring damper 14.

[0036] A fixing block 15 is disposed on the bottom end surface of the rotating shaft 19 , and the fixing block 15 is installed in the fixing tube 5 via a bracket 16 . The rotating shaft 19 can be installed and supported by the fixing block 15 and the bracket 16 .

[0037] Based on Example 1: When personnel are spraying coal on the kiln head, they can install the coal powder pipe 1 on the kiln head. After installation, it can be installed on the spring damper 14 through the bottom end face of the support rod 12 and slidably sleeved in the support rod 2 13 to limit the displacement, so that the coal powder injected into the sleeve 3 can be limited by the baffle 11 to prevent the direct fall of the coal powder from causing large grinding of the pipeline and internal equipment, and the impact force of the coal powder can be buffered by the spring damper 14 when the impact of the coal powder on the baffle 11 is buffered.

[0038] Embodiment 2

[0039] like Figure 1-4 As shown, the kiln head coal injection pipe proposed by the utility model, compared with the first embodiment, this embodiment also includes: a pulverized coal pipe 1, a mixing pipe 6, a mounting block 10 and a rotating shaft 19,

[0040] A mixing pipe 6 is installed on the pulverized coal pipe 1 through a flange, a fixing pipe 5 is installed on the mixing pipe 6 through a flange, and a sleeve 3 is installed on the mixing pipe 6 through a flange;

[0041] One end of the mixing tube 6 is embedded in the air intake pipe 2, and the end of the mixing tube 6 facing away from the air intake pipe 2 is embedded and fixed with the diverter pipe 4;

[0042] The two ends of the rotating shaft 19 are welded with fan blades 18, and the fan blades 18 are slidably sleeved with a housing 20;

[0043] Both ends of the inner wall of the sleeve 3 are welded with mounting blocks 10 and a fixing frame 8, and a spring damper 14 is installed on the fixing frame 8 through a supporting rod 2 13;

[0044] A connecting shaft 9 is welded inside the mounting block 10 , and a baffle 11 is sleeved on the connecting shaft 9 .

[0045] An air duct 7 is embedded and fixed on the side end face of the pulverized coal pipe 1, and the air duct 7 is in gas communication with the pulverized coal pipe 1. The cement kiln preheater exhaust pipe can be connected through the air duct 7, so that the heat-containing gas in the kiln body after treatment and recovery enters the mixing pipe 6 and reaches the fixed pipe 5 for use, thereby preheating the pulverized coal. Cement kiln gas recovery and gas heating of the preheater are conventional technical means for cement processing, so they will not be described in detail here, and technicians in this field can make any selection according to their needs or convenience.

[0046] The top and bottom surfaces of the shell 20 are both threadedly mounted with bolts 17, and the bolts 17 are threadedly mounted in the fan blades 18. The shell 20 can be mounted on the fan blades 18 through the bolts 17, so that the shell 20 can protect the outer surface of the fan blades 18.

[0047] Based on Example 2: when personnel are spraying coal on the kiln head, the air inlet pipe 2 is connected to the mixing pipe 6 by gas, so that when personnel are spraying coal powder, the personnel can inject high-pressure gas into the mixing pipe 6 through the air inlet pipe 2 with an external high-pressure fan, and the coal powder is sprayed through the high-pressure gas. When the gas is injected, the coal powder and the gas enter the fixed pipe 5, which can drive the fan blades 18 to rotate and break up the coal powder to avoid coal powder agglomeration. The shell 20 can be installed on the fan blade 18 by the bolts 17, so that the shell 20 can protect the outer surface of the fan blade 18 to prevent the blades of the fan blade 18 from being damaged by long-term contact with the coal powder.

[0048] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A kiln head coal injection pipe, comprising a pulverized coal pipe (1), a mixing pipe (6), a mounting block (10) and a rotating shaft (19), characterized in that: A mixing pipe (6) is mounted on the pulverized coal pipe (1) via a flange, a fixing pipe (5) is mounted on the mixing pipe (6) via a flange, and a sleeve (3) is mounted on the mixing pipe (6) via a flange; One end of the mixing tube (6) is embedded in the air intake pipe (2), and the end of the mixing tube (6) facing away from the air intake pipe (2) is embedded and fixed with a flow divider pipe (4); Both ends of the rotating shaft (19) are welded with fan blades (18), and a housing (20) is slidably sleeved on the fan blades (18); Both ends of the inner wall of the sleeve (3) are welded with a mounting block (10) and a fixing frame (8), and a spring damper (14) is installed on the fixing frame (8) via a second support rod (13); A connecting shaft (9) is welded inside the installation block (10), and a baffle (11) is sleeved on the connecting shaft (9).

2. A kiln head coal injection pipe according to claim 1, characterized in that: The mixing tube (6) is connected to the pulverized coal tube (1), the fixed tube (5) is connected to the mixing tube (6), and the mixing tube (6) is connected to the sleeve (3).

3. The kiln head coal injection pipe according to claim 1, characterized in that: An air duct (7) is embedded and fixed on the side end surface of the pulverized coal pipe (1), and the air duct (7) is in gas communication with the pulverized coal pipe (1).

4. The kiln head coal injection pipe according to claim 1, characterized in that: The air intake pipe (2) is in gas communication with the mixing pipe (6), and a valve is installed on the air intake pipe (2) via a flange.

5. The kiln head coal injection pipe according to claim 1, characterized in that: Bolts (17) are threadedly mounted on the top and bottom end surfaces of the housing (20), and the bolts (17) are threadedly mounted inside the fan blades (18).

6. The kiln head coal injection pipe according to claim 1, characterized in that: A support rod 1 (12) is welded to the bottom end surface of the baffle (11), and the support rod 1 (12) is slidably sleeved in the support rod 2 (13), and the bottom end surface of the support rod 1 (12) is mounted on the spring damper (14).

7. The kiln head coal injection pipe according to claim 1, characterized in that: A fixing block (15) is provided on the bottom end surface of the rotating shaft (19), and the fixing block (15) is installed in the fixing tube (5) via a bracket (16).

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