In-furnace high-temperature denitration spray head device

Abstract

The utility model provides an in-furnace high-temperature denitration spray head device, which relates to the technical field of in-furnace high-temperature denitration and comprises a device body. The device body is provided with an in-furnace injector head in the front-back direction, threads are arranged on the outer circumference of the rear end of the in-furnace injector head, a limiting ring plate is arranged on the outer circumference of the front end of the in-furnace injector head, a regular hexagonal prism is arranged on the front end face of the in-furnace injector head, a circulation hole is formed in the in-furnace injector head, and a circular truncated cone hole is formed in the front end of the circulation hole of the in-furnace injector head. A ceramic heat insulation cylinder in the front-back direction sleeves the outer circumference of the in-furnace injector head, and a limiting ring groove is formed in the inner circumference of the front end of the ceramic heat insulation cylinder, so that the ceramic heat insulation cylinder sleeves the outer circumference of the in-furnace injector head conveniently, and the in-furnace injector head is protected conveniently through the ceramic heat insulation cylinder; the denitration nozzle is easy to damage under the action of high temperature in the furnace for a long time, and heat insulation measures are inconvenient to add on the denitration nozzle to perform heat insulation protection on the denitration nozzle so as to prolong the service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of in - furnace high - temperature denitration, and particularly relates to an in - furnace high - temperature denitration spray head device. Background Technique

[0002] In - furnace high - temperature denitration is a denitration technology carried out inside a boiler or other combustion equipment, aiming to reduce nitrogen oxide emissions. It mainly uses chemical reactions under high - temperature conditions to convert nitrogen oxides in flue gas into harmless nitrogen and water vapor. That is, by directly spraying a reducing agent into the high - temperature flue gas in the furnace, under the condition of no catalyst or using a special catalyst, nitrogen oxides are reduced to nitrogen and water.

[0003] Based on the above, the inventor found that the existing in - furnace high - temperature denitration spray head device has the following deficiencies:

[0004] 1. The denitration spray head is in the furnace and is prone to damage under the long - term action of high temperature in the furnace. It is not convenient to install heat - insulation measures on the denitration spray head to provide heat - insulation protection for the denitration spray head and extend its service life.

[0005] 2. The denitration spray head is an integral type. After the in - furnace part of the denitration spray head is damaged, it needs to be replaced as a whole. It is not convenient to set the denitration spray head as a split structure so that the in - furnace part of the denitration spray head can be disassembled and replaced separately. Content of the Utility Model

[0006] In order to solve the above - mentioned technical problems, the utility model provides an in - furnace high - temperature denitration spray head device to solve the problems that the existing denitration spray head is in the furnace and is prone to damage under the long - term action of high temperature in the furnace, and it is not convenient to install heat - insulation measures on the denitration spray head to provide heat - insulation protection for the denitration spray head and extend its service life; the denitration spray head is an integral type, and after the in - furnace part of the denitration spray head is damaged, it needs to be replaced as a whole, and it is not convenient to set the denitration spray head as a split structure so that the in - furnace part of the denitration spray head can be disassembled and replaced separately.

[0007] The purpose and effect of the in - furnace high - temperature denitration spray head device of the utility model are achieved by the following specific technical means:

[0008] An in - furnace high - temperature denitration spray head device includes a device body; the device body is provided with an in - furnace spray head in the front - to - rear direction. A thread is provided on the outer circumference of the rear end of the in - furnace spray head. A limiting ring plate is provided on the outer circumference of the front end of the in - furnace spray head. A regular hexagonal prism is provided on the front end face of the in - furnace spray head. A flow - through hole is provided inside the in - furnace spray head. A frustum - shaped hole is provided at the front end of the flow - through hole of the in - furnace spray head. A ceramic heat - insulation cylinder in the front - to - rear direction is sleeved on the outer circumference of the in - furnace spray head. A limiting ring groove is provided on the inner circumference of the front end of the ceramic heat - insulation cylinder. A conical surface is provided on the outer circumference of the front end of the ceramic heat - insulation cylinder.

[0009] Furthermore, a docking sealing ring is placed inside the insertion hole of the out-of-furnace spray head seat, and an annular groove is formed on the outer circumference of the docking sealing ring.

[0010] Furthermore, a front-back direction docking locking cylinder is installed on the outer circumference of the rear of the out-of-furnace spray head seat through threads. Threads are provided on the inner circumference of the docking locking cylinder. A limiting ring plate is arranged on the inner circumference of the rear end of the docking locking cylinder. Eight front-back direction rotating grooves are arranged in an annular array on the outer circumference of the docking locking cylinder.

[0011] Furthermore, a front-back direction liquid supply pipe is inserted into the insertion hole of the out-of-furnace spray head seat. A limiting ring plate is arranged on the outer circumference of the front of the liquid supply pipe, and an annular groove is formed on the outer circumference of the front end of the liquid supply pipe.

[0012] Furthermore, a through hole is formed at the center of the threaded blind hole of the out-of-furnace spray head seat. A conical hole is arranged behind the through hole of the out-of-furnace spray head seat. A circulation hole is arranged behind the conical hole of the out-of-furnace spray head seat. An insertion hole is arranged behind the circulation hole of the out-of-furnace spray head seat.

[0013] Furthermore, a fixed ring plate is arranged on the outer circumference of the front end of the out-of-furnace spray head seat. Four front-back penetrating fixed holes are arranged in an annular array on the fixed ring plate of the out-of-furnace spray head seat. A threaded blind hole is formed at the center of the front end face of the out-of-furnace spray head seat.

[0014] Furthermore, a front-back direction out-of-furnace spray head seat is installed on the outer circumference of the rear end of the in-furnace spray head through threads. Threads are provided on the outer circumference of the rear of the out-of-furnace spray head seat, and a regular hexagon structure is arranged on the outer circumference of the front of the out-of-furnace spray head seat.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] It is convenient for the ceramic heat insulation cylinder to be sleeved on the outer circumference of the in-furnace spray head, and it is convenient to protect the in-furnace spray head through the ceramic heat insulation cylinder, solving the problem that the denitration spray head is in the furnace and is prone to damage under the long-term high temperature in the furnace, and it is not convenient to install heat insulation measures on the denitration spray head to provide heat insulation protection for the denitration spray head and extend its service life.

[0017] It is convenient for the in-furnace spray head to be installed on the out-of-furnace spray head seat through threads, and it is convenient to disassemble and replace the in-furnace spray head after it is damaged, solving the problem that the denitration spray head is integrated and needs to be replaced as a whole after the in-furnace part of the denitration spray head is damaged, and it is not convenient to set the denitration spray head as a split structure so that the in-furnace part of the denitration spray head can be disassembled and replaced separately. Description of the Drawings

[0018] Figure 1 It is the front view structural schematic diagram of the utility model.

[0019] Figure 2It is a schematic rear view structure of the present utility model.

[0020] Figure 3 It is a schematic sectional view structure of the present utility model.

[0021] Figure 4 It is a schematic disassembled structure of the present utility model.

[0022] Figure 5 It is an assembly schematic diagram of the in-furnace injection head and the out-of-furnace nozzle seat of the present utility model.

[0023] Figure 6 It is an assembly schematic diagram of the out-of-furnace nozzle seat and the liquid supply pipe of the present utility model.

[0024] In the figure: 1, device body; 2, in-furnace injection head; 3, ceramic heat insulation cylinder; 4, out-of-furnace nozzle seat; 5, liquid supply pipe; 6, docking locking cylinder; 7, docking sealing ring. Specific embodiments

[0025] The following further describes the embodiments of the present invention in detail in conjunction with the drawings and examples.

[0026] Embodiment 1:

[0027] As shown in Figure 1 to Figure 6 shown:

[0028] The present utility model provides a high-temperature denitration nozzle device in a furnace, including a device body 1; the device body 1 is provided with an in-furnace injection head 2 in the front-rear direction, which is convenient for injecting denitration reducing agent in the furnace. The outer circumference of the rear end of the in-furnace injection head 2 is provided with a thread, which is convenient for installing on the out-of-furnace nozzle seat 4 through the thread. The outer circumference of the front end of the in-furnace injection head 2 is provided with a limiting ring plate, which is convenient for limiting and preventing the ceramic heat insulation cylinder 3 from falling off. The front end face of the in-furnace injection head 2 is provided with a regular hexagonal prism, which is convenient for rotating and disassembling with tools. The inside of the in-furnace injection head 2 is provided with a flow-through hole, which is convenient for liquid to pass through. The front end of the flow-through hole of the in-furnace injection head 2 is provided with a frustum-shaped hole, which is convenient for liquid injection. The outer circumference of the in-furnace injection head 2 is sleeved with a ceramic heat insulation cylinder 3 in the front-rear direction, which is convenient for protecting the in-furnace injection head 2. The inner circumference of the front end of the ceramic heat insulation cylinder 3 is provided with a limiting ring groove, which is convenient for the in-furnace injection head 2 to be hidden inside. The outer circumference of the front end of the ceramic heat insulation cylinder 3 is provided with a conical surface, which is convenient for assembly and insertion. The outer circumference of the rear end of the in-furnace injection head 2 is installed with an out-of-furnace nozzle seat 4 in the front-rear direction through a thread, which is convenient for carrying each component. The outer circumference of the rear of the out-of-furnace nozzle seat 4 is provided with a thread, which is convenient for the docking locking cylinder 6 to be installed through the thread. The outer circumference of the front of the out-of-furnace nozzle seat 4 is provided with a regular hexagonal structure, which is convenient for anti-rotation with tools.

[0029] Among them, a fixed ring plate is arranged on the outer circumference of the front end of the external nozzle seat 4 of the furnace, which is convenient for installation on the furnace body through bolts. Four through fixing holes are arranged in a circular array on the fixed ring plate of the external nozzle seat 4 of the furnace, which is convenient for bolts to pass through. A threaded blind hole is opened at the center of the front end face of the external nozzle seat 4 of the furnace, which is convenient for the internal injection head 2 of the furnace to be installed by thread. A through hole is opened at the center of the threaded blind hole of the external nozzle seat 4 of the furnace, which is convenient for liquid to pass through. A conical hole is arranged behind the through hole of the external nozzle seat 4 of the furnace, which is convenient for converging the liquid. A circulation hole is arranged behind the conical hole of the external nozzle seat 4 of the furnace, which is convenient for liquid circulation. An insertion hole is arranged behind the circulation hole of the external nozzle seat 4 of the furnace, which is convenient for the liquid supply pipe 5 to be inserted. A liquid supply pipe 5 in the front-back direction is inserted into the insertion hole of the external nozzle seat 4 of the furnace, which is convenient for connecting external liquid supply equipment. A limiting ring plate is arranged on the outer circumference of the front end of the liquid supply pipe 5, which is convenient for the docking locking cylinder 6 to hold. An annular groove is opened on the outer circumference of the front end of the liquid supply pipe 5, which is convenient for inserting into the insertion hole of the external nozzle seat 4 of the furnace. A docking locking cylinder 6 in the front-back direction is installed on the outer circumference of the rear end of the external nozzle seat 4 of the furnace by thread, which is convenient for locking and preventing the liquid supply pipe 5 from falling off. Internal threads are arranged on the inner circumference of the docking locking cylinder 6, which is convenient for installation by thread. A limiting ring plate is arranged on the inner circumference of the rear end of the docking locking cylinder 6, which is convenient for holding the limiting ring plate of the liquid supply pipe 5. Eight rotation grooves in the front-back direction are arranged in a circular array on the outer circumference of the docking locking cylinder 6, which is convenient for rotation by tools. A docking sealing ring 7 is placed in the insertion hole of the external nozzle seat 4 of the furnace, which is convenient for docking and sealing through the docking sealing ring 7. An annular groove is opened on the outer circumference of the docking sealing ring 7, which is convenient for the docking sealing ring 7 to be deformed under force to achieve sealing.

[0030] Specific usage method and function of this embodiment:

[0031] In the present utility model, as Figure 3 shown, the state of the device body 1 when installed on the furnace body. At this time, the external nozzle seat 4 of the furnace is installed on the outside of the furnace body through bolts. The internal injection head 2 of the furnace and the ceramic heat insulation cylinder 3 are located inside the installation hole of the furnace body. The ceramic heat insulation cylinder 3 is located on the outer circumference of the internal injection head 2 of the furnace. The front end of the internal injection head 2 of the furnace is hidden inside the ceramic heat insulation cylinder 3. Thus, the internal injection head 2 of the furnace is protected by the ceramic heat insulation cylinder 3, thereby extending the service life of the internal injection head 2 of the furnace. When the internal injection head 2 of the furnace is disassembled, the internal injection head 2 of the furnace is rotated by a tool to be thread-engaged with the external nozzle seat 4 of the furnace, so that the internal injection head 2 of the furnace moves forward through thread engagement and disengages from the threaded blind hole of the external nozzle seat 4 of the furnace. Then, the internal injection head 2 of the furnace is pulled forward to be removed from inside the ceramic heat insulation cylinder 3. Thus, the disassembly of the internal injection head 2 of the furnace is completed. At the same time, when the ceramic heat insulation cylinder 3 is damaged, the ceramic heat insulation cylinder 3 can be pulled forward to be removed from inside the installation hole of the furnace body.

[0032] Embodiment Two:

[0033] The difference from the first embodiment is that the regular hexagonal prism of the in-furnace injection head 2 can also be set as a regular heptagonal prism, so that the in-furnace injection head 2 needs to be rotated by a special tool that cooperates with the regular heptagonal prism, preventing non-staff from rotating and disassembling the in-furnace injection head 2.

[0034] Embodiment Three:

[0035] The difference from the first embodiment is that the front end face of the out-of-furnace nozzle holder 4 can also be set as a frosted surface, thereby increasing the friction between the front end face of the out-of-furnace nozzle holder 4 and the ceramic heat insulation cylinder 3 and preventing the ceramic heat insulation cylinder 3 from rotating and affecting the assembly.

Claims

1. A high-temperature denitration spray head device in a furnace, characterized in that: It includes a device body (1); the device body (1) is provided with an in-furnace spray head (2). The outer circumference of the rear end of the in-furnace spray head (2) is provided with threads. The outer circumference of the front end of the in-furnace spray head (2) is provided with a limiting ring plate. The front end face of the in-furnace spray head (2) is provided with a regular hexagonal prism. The in-furnace spray head (2) is internally provided with a circulation hole. The front end of the circulation hole of the in-furnace spray head (2) is provided with a frustum-shaped hole. The outer circumference of the in-furnace spray head (2) is sleeved with a ceramic heat insulation cylinder (3). The inner circumference of the front end of the ceramic heat insulation cylinder (3) is provided with a limiting ring groove. The outer circumference of the front end of the ceramic heat insulation cylinder (3) is provided with a conical surface.

2. The high-temperature denitration nozzle device in the furnace according to claim 1, wherein: The outer circumference of the rear end of the in-furnace spray head (2) is threadedly installed with an out-of-furnace spray head seat (4). The outer circumference of the rear of the out-of-furnace spray head seat (4) is provided with threads. The outer circumference of the front of the out-of-furnace spray head seat (4) is provided with a regular hexagonal structure.

3. The high-temperature denitration spray head device in the furnace according to claim 2, wherein: The outer circumference of the front end of the out-of-furnace spray head seat (4) is provided with a fixing ring plate. Four through holes running through in the front and rear directions are annularly arranged on the fixing ring plate of the out-of-furnace spray head seat (4). The center of the front end face of the out-of-furnace spray head seat (4) is provided with a threaded blind hole.

4. The high-temperature denitration spray head device in the furnace according to claim 3, characterized in that: A through hole is provided at the center of the threaded blind hole of the out-of-furnace spray head seat (4). A frustum-shaped hole is provided behind the through hole of the out-of-furnace spray head seat (4). A circulation hole is provided behind the frustum-shaped hole of the out-of-furnace spray head seat (4). An insertion hole is provided behind the circulation hole of the out-of-furnace spray head seat (4).

5. The high-temperature denitration spray head device in the furnace according to claim 4, characterized in that: A liquid supply pipe (5) is inserted into the insertion hole of the out-of-furnace spray head seat (4). The outer circumference of the front of the liquid supply pipe (5) is provided with a limiting ring plate. An annular groove is provided on the outer circumference of the front end of the liquid supply pipe (5).

6. The high-temperature denitration nozzle device in the furnace according to claim 5, characterized in that: The outer circumference of the rear of the out-of-furnace spray head seat (4) is threadedly installed with a docking locking cylinder (6). The inner circumference of the docking locking cylinder (6) is provided with threads. The inner circumference of the rear end of the docking locking cylinder (6) is provided with a limiting ring plate. Eight rotation grooves in the front and rear directions are annularly arranged on the outer circumference of the docking locking cylinder (6).

7. The high-temperature denitration nozzle device in the furnace according to claim 6, characterized in that: A docking sealing ring (7) is placed in the insertion hole of the out-of-furnace spray head seat (4). An annular groove is provided on the outer circumference of the docking sealing ring (7).

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