Flue gas and air nozzle device convenient for checking and cleaning blocked coke blocks at nozzle

Abstract

The utility model discloses a flue gas nozzle device convenient for checking and cleaning blocked coke blocks at a nozzle, which comprises a nozzle, a distribution pipe and a distribution header, one end of the distribution pipe is connected with the distribution header, the other end of the distribution pipe is provided with a manual air door, the manual air door is connected with the nozzle, and two ends of the nozzle are respectively a port a and a port b. Secondary air or recirculated flue gas enters the furnace through the nozzle at the end a, the port b is provided with a detachable peeping device, a purging assembly is arranged at the lower part in the port b, and a sealing air assembly is arranged at the upper part in the port b; according to the utility model, the detachable peeping device is arranged on the port b of the nozzle, so that whether the port a is coked and blocked or not can be checked at any time, and whether the port of the nozzle is coked and blocked or not can be checked when the boiler is in an operation state; and coke blocks blocked at the a-end nozzle can be removed in the operation state of the incineration boiler, the smoothness of the a-end nozzle is ensured, the combustion efficiency can be effectively improved, and the generation of thermal NOx can be inhibited.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler secondary air or smoke, in particular to a smoke and air nozzle device which is convenient for checking and cleaning coke blocks blocking the nozzle. Background Art

[0002] The ash of fuels such as domestic garbage and biomass has a low melting point and is easy to coke in the high-temperature area of ​​the secondary air and flue gas recirculation nozzles. The distribution pipe nozzles are often blocked, and the secondary air and recirculated flue gas cannot be evenly sprayed into the furnace to participate in combustion, resulting in insensitive adjustment of the combustion conditions. When the furnace temperature is too high, it is difficult to adjust through the secondary air and recirculated flue gas, and the combustion efficiency is reduced. The original NO in the flue gas x The concentration increases. The traditional secondary air or flue gas recirculation nozzle device is blocked by coking. The blocked coke can only be cleaned after the furnace is shut down, which has an adverse effect on the efficient operation of the incineration boiler.

[0003] The utility model proposes a flue gas nozzle device that is convenient for checking and cleaning the coke blockage at the nozzle, which can realize the inspection of whether there is coke blockage at the nozzle nozzle when the boiler is running, and can clean it during the operation of the boiler. It solves the problem that the traditional secondary air or flue gas recirculation nozzle device cannot check and clean the coke blockage at the nozzle during the operation of the boiler. Utility Model Content

[0004] The utility model aims to solve the technical problems existing in the prior art and to provide a smoke and air nozzle device which is convenient for checking and cleaning the coke blocks blocking the nozzle.

[0005] To achieve the above-mentioned purpose, the technical solution provided by the utility model is: a smoke and air nozzle device which is convenient for checking and cleaning coke blocks blocked in the nozzle, comprising a nozzle, a distribution pipe and a distribution collection box, one end of the distribution pipe is connected to the distribution collection box, and the other end of the distribution pipe is provided with a manual air door, and the manual air door is connected to the nozzle, and the two ends of the nozzle are port a and port b respectively, and the secondary air or recycled flue gas enters the furnace through the nozzle at end a, and a detachable peeping device is provided at port b, and a purge assembly for purging the cooling peeping device is provided at the inner lower part of port b, and a sealing air assembly for removing coke blocks is provided at the inner upper part of port b.

[0006] Preferably, the peeping device includes a concave flange group, high temperature resistant glass, a high temperature resistant sealing gasket and a bolt group, the concave flange group includes a first concave flange and a second concave flange, the first concave flange is welded to port b, the second concave flange is fixed to the first concave flange by a bolt group, the high temperature resistant glass is installed in the concave surfaces of the first concave flange and the second concave flange, and high temperature resistant sealing gaskets are arranged between the high temperature resistant glass and the first concave flange and the second concave flange.

[0007] Preferably, a compressed air pipe is welded on the nozzle, the purge assembly includes a purge air interface, the purge air interface is located below the nozzle, the purge air interface is fixedly connected to the compressed air pipe, and a purge air ball valve is provided between the purge air interface and the compressed air pipe;

[0008] The sealing air component comprises a sealing air interface, which is located above the nozzle, fixedly connected to the compressed air pipe, and a sealing air ball valve is arranged between the sealing air interface and the compressed air pipe.

[0009] Preferably, the compressed air pipe is made of seamless carbon steel pipe, the purge wind ball valve needs to be opened during normal operation, and the purge wind ball valve needs to be closed when cleaning the coke blocks at port a of the nozzle; the sealing wind ball valve needs to be closed during normal operation, and the sealing wind ball valve needs to be opened when cleaning the coke blocks at port a of the nozzle.

[0010] Preferably, the manual air door needs to be opened during normal operation, and the manual air door needs to be closed when cleaning the coke mass at port a of the nozzle.

[0011] Preferably, the distribution header is made of carbon structural steel, the distribution pipe and the nozzle are made of heat-resistant stainless steel, and the inside and outside of the distribution header are painted with heat-resistant and anti-corrosion paint.

[0012] Beneficial effects of the utility model:

[0013] The utility model provides a detachable peek device on the b port of the nozzle, which can check whether the a end nozzle is blocked by coking at any time, so as to check whether the nozzle of the nozzle is blocked by coking when the boiler is in operation; and can remove the coke stuck at the a end nozzle when the incineration boiler is in operation, so as to ensure that the a end nozzle is unobstructed, which can effectively improve the combustion efficiency and inhibit the thermal NO x Generation of. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0015] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the utility model;

[0016] Figure 2 It is a schematic structural diagram of a peeping device according to a preferred embodiment of the utility model.

[0017] Figure annotation:

[0018] 1-nozzle, 2-manual damper, 3-distribution pipe, 4-distribution header, 51-purge air ball valve, 52-purge air interface, 53-sealed air ball valve, 54-sealed air interface, 6-compressed air pipe, 71-first concave flange, 72-second concave flange, 8-high temperature resistant glass, 9-high temperature resistant sealing gasket, 10-bolt group. DETAILED DESCRIPTION

[0019] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0020] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, 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 cannot be understood as a limitation on the present invention.

[0021] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0023] Reference Figure 1-Figure 2 , a preferred embodiment of the utility model, a smoke and air nozzle device which is convenient for checking and cleaning the coke blocks blocking the nozzle, is characterized in that: it includes a nozzle 1, a distribution pipe 3 and a distribution collection box 4, one end of the distribution pipe 3 is connected to the distribution collection box 4, and the other end of the distribution pipe 3 is provided with a manual air door 2, the manual air door 2 is connected to the nozzle 1, and the two ends of the nozzle 1 are port a and port b respectively. The secondary air or recycled smoke enters the furnace through the nozzle at the a end, and a detachable peeping device is provided at the b port. A purge component for purging the cooling peeping device is provided at the inner lower part of the b port, and a sealing wind component for removing coke blocks is provided at the inner upper part of the b port.

[0024] The b port of the nozzle 1 of the utility model is provided with a detachable peep device, which can check whether the a port is coked and blocked at any time; and can remove the coke blocks blocking the a port nozzle when the incineration boiler is running, ensuring that the a port is unobstructed, which can effectively improve the combustion efficiency and inhibit thermal NO x Generation of.

[0025] In this embodiment, the peep device includes a concave flange group, a high temperature resistant glass 8, a high temperature resistant sealing gasket 9 and a bolt group 10. The concave flange group includes a first concave flange 71 and a second concave flange 72. The first concave flange 71 is welded to the b port, and the second concave flange 72 is fixed to the first concave flange 71 by the bolt group 10. The high temperature resistant glass 8 is installed in the concave surfaces of the first concave flange 71 and the second concave flange 72. A high temperature resistant sealing gasket 9 is provided between the high temperature resistant glass 8 and the first concave flange 71 and the second concave flange 72. If the a port is blocked by coking, the peep device of the b port can be opened during boiler operation to remove the coke.

[0026] In this embodiment, a compressed air pipe 6 is welded on the nozzle 1, and the purge assembly includes a purge air interface 52, which is located below the nozzle 1, and the purge air interface 52 is fixedly connected to the compressed air pipe 6, and a purge air ball valve 51 is provided between the purge air interface 52 and the compressed air pipe 6;

[0027] The sealed air component includes a sealed air interface 54 , which is located above the nozzle 1 , and is fixedly connected to the compressed air pipe 6 , and a sealed air ball valve 53 is provided between the sealed air interface 54 and the compressed air pipe 6 .

[0028] Specifically, the compressed air connected to the b port of the nozzle 1 is used to provide purge air to purge the peeping device; and is used as sealing air during decoking. The compressed air is controlled by the purge air ball valve 51 and the sealing air ball valve 53 on the compressed air pipe 6. During normal operation, the pressure of the compressed air vertically entering the nozzle 1 drops sharply and expands rapidly, thereby playing the role of purging the peeping device, which is used to prevent dust accumulation inside the peeping device, keep the inside of the peeping device clean, and cool down the temperature of the peeping device. At the same time, when decoking is required during the operation of the boiler, the sealed air curtain formed by the compressed air can prevent the positive pressure flue gas from backflowing and burning the staff.

[0029] In this embodiment, the compressed air pipe 6 is made of a seamless carbon steel pipe. The purge wind ball valve 51 needs to be opened during normal operation, and needs to be closed when cleaning the coke blocks at port a of the nozzle 1; the sealing wind ball valve 53 needs to be closed during normal operation, and needs to be opened when cleaning the coke blocks at port a of the nozzle 1.

[0030] In this embodiment, the manual air door 2 needs to be opened during normal operation, and the manual air door 2 needs to be closed when cleaning the coke mass at the port a of the nozzle 1.

[0031] In this embodiment, the distribution header 4 is made of carbon structural steel, the distribution pipe 3 and the nozzle 1 are made of heat-resistant stainless steel, and the inside and outside of the distribution header 4 are painted with heat-resistant and anti-corrosion paint.

[0032] Working principle of the utility model: the utility model is used to distribute secondary air or recirculated flue gas and spray it into the boiler, belonging to the technical field of boiler secondary air or flue gas recirculation distribution. Specifically, the secondary air or recirculated flue gas passes through the distribution header 4, the distribution pipe 3, the manual air door 2 and the nozzle 1 and is sprayed into the furnace to mix with the flue gas to participate in combustion. The peeping device at the b port of the nozzle 1 is used to check and clean the coking blockage problem of the a port to ensure uniform air distribution, which can effectively improve the combustion efficiency, and the purge assembly at the lower part of the b port is used to purge and cool the peeping device. When the sealing wind assembly at the upper part of the b port needs to be decoked during the operation of the boiler, the sealed wind curtain formed by the compressed air can prevent the positive pressure flue gas from flowing back and burning the staff.

[0033] The utility model can check whether port A is blocked by coking at any time through the peeping device of port B of nozzle 1; if port A is blocked by coking, the peeping device of port B can be opened to remove the blocked coke block, clean the nozzle of end A, and the coke block blocked at port A can be removed through the detachable peeping device of port B of nozzle 1 in the running state to ensure that port A is unobstructed; when port A is unobstructed, secondary air or recirculated flue gas can be sprayed into the furnace more evenly, fully mixed with the high-temperature flue gas in the nozzle area, evenly reduce the flue gas temperature in the area and change the oxygen concentration in the area, so as to suppress thermal NO x The incompletely burned combustibles in the flue gas can be more fully exposed to the combustion air, which is beneficial to the complete combustion of the fuel and improves the combustion efficiency.

[0034] Under the premise that no conflict occurs, those skilled in the art may freely combine and superimpose the above-mentioned additional technical features.

[0035] The above description is only a preferred implementation mode of the present utility model. Any technical solution that achieves the purpose of the present utility model by substantially the same means shall fall within the protection scope of the present utility model.

Claims

1. A smoke and air nozzle device that is convenient for checking and cleaning the coke blocks blocking the nozzle, characterized in that: The invention comprises a nozzle (1), a distribution pipe (3) and a distribution header (4); one end of the distribution pipe (3) is connected to the distribution header (4); the other end of the distribution pipe (3) is provided with a manual damper (2); the manual damper (2) is connected to the nozzle (1); the two ends of the nozzle (1) are port a and port b respectively; secondary air or recirculated flue gas enters the furnace through the nozzle at the a end; a detachable peep device is provided at the b port; a purge assembly for purging the cooling peep device is provided at the inner lower part of the b port; and a sealing air assembly for removing coke blocks is provided at the inner upper part of the b port.

2. A smoke and air nozzle device that is convenient for checking and cleaning the coke blocks blocking the nozzle according to claim 1, characterized in that: The peep device comprises a concave flange group, a high temperature resistant glass (8), a high temperature resistant sealing gasket (9) and a bolt group (10); the concave flange group comprises a first concave flange (71) and a second concave flange (72); the first concave flange (71) is welded to the b port; the second concave flange (72) is fixed to the first concave flange (71) by the bolt group (10); the high temperature resistant glass (8) is installed in the concave surfaces of the first concave flange (71) and the second concave flange (72); and high temperature resistant sealing gaskets (9) are arranged between the high temperature resistant glass (8) and the first concave flange (71) and the second concave flange (72).

3. A smoke and air nozzle device that is convenient for checking and cleaning the coke blocks blocking the nozzle according to claim 1, characterized in that: A compressed air pipe (6) is welded to the nozzle (1), and the purge assembly comprises a purge air interface (52), the purge air interface (52) is located below the nozzle (1), the purge air interface (52) is fixedly connected to the compressed air pipe (6), and a purge air ball valve (51) is provided between the purge air interface (52) and the compressed air pipe (6); The sealed air component comprises a sealed air interface (54), the sealed air interface (54) is located above the nozzle (1), the sealed air interface (54) is fixedly connected to the compressed air pipe (6), and a sealed air ball valve (53) is provided between the sealed air interface (54) and the compressed air pipe (6).

4. A smoke and air nozzle device that is convenient for checking and cleaning the coke blocks blocking the nozzle according to claim 3, characterized in that: The compressed air pipe (6) is made of a seamless carbon steel pipe. The purge air ball valve (51) needs to be opened during normal operation, and needs to be closed when cleaning the coke mass at the port a of the nozzle (1). The sealing air ball valve (53) needs to be closed during normal operation, and needs to be opened when cleaning the coke mass at the port a of the nozzle (1).

5. A smoke and air nozzle device that is convenient for checking and cleaning the coke blocks blocking the nozzle according to claim 1, characterized in that: The manual air door (2) needs to be opened during normal operation, and the manual air door (2) needs to be closed when cleaning the coke mass at the port a of the nozzle (1).

6. A smoke and air nozzle device that is convenient for checking and cleaning the coke blocks blocking the nozzle according to claim 1, characterized in that: The distribution header (4) is made of carbon structural steel, the distribution pipe (3) and the nozzle (1) are made of heat-resistant stainless steel, and the inside and outside of the distribution header (4) are painted with heat-resistant anti-corrosion paint.

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