CN217109582U

CN217109582U - High-concentration odor combustion device of alkali recovery boiler

Info

Publication number: CN217109582U
Application number: CN202122939600.2U
Authority: CN
Inventors: 刘刚
Original assignee: Hainan Jinhai Pulp and Paper Co Ltd
Current assignee: Hainan Jinhai Pulp and Paper Co Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-08-02
Anticipated expiration: 2031-11-26

Abstract

The utility model relates to an odor combustion technical field discloses a high-concentration odor combustion device of an alkali recovery boiler, including the dissolving tank that is used for carrying out the alkali recovery boiler that burns to the black liquor and carries out the flourishing connecing to the smelt after burning, a serial communication port, dissolving the tank bit in the rear end of alkali recovery boiler, alkali recovery boiler keeps away from the both sides of dissolving tank are equipped with the odor burner, the odor burner with alkali recovery boiler communicates, the odor burner is equipped with the odor intake pipe that introduces high-concentration odor, liquid drop separator and spark arrester are installed to the outer end of odor intake pipe, high-concentration odor passes through in proper order enter behind liquid drop separator and the spark arrester in the odor burner, when this device can detach the moisture that probably contains in the odor, prevent because of the low tempering that leads to of the odor velocity of flow, and the odor burner keeps away from the top that the smelt enters the dissolving tank, the bad influence of the low-temperature area of the hearth on the melt after the black liquor is combusted, which is caused by the combustion and decomposition of the odor in the hearth, is prevented.

Description

High-concentration odor combustion device of alkali recovery boiler

Technical Field

The utility model relates to an odor combustion device, in particular to a layout design of a high-concentration odor combustion device of an alkali recovery boiler.

Background

The high-concentration gas treatment process generated in the pulping process tends to be mature and perfect through the development of recent decades, and the main treatment method is to hermetically collect high-concentration odor generated in each section of a pulping production line and finally send the high-concentration odor to an alkali recovery boiler for combustion and decomposition so as to recover heat energy and 'S' in the high-concentration odor. The prior high-concentration odor combustion process has the following defects: the high-concentration odor burner is arranged at the single rear side, so that the high-concentration odor causes the temperature of a rear side combustion area to be reduced when the high-concentration odor is burnt and decomposed in a furnace, further the state of a molten material flowing out of a hearth is unstable, and the control of an important operation parameter mirabilite reduction rate of alkali recovery and a boiler cushion layer is influenced; meanwhile, when the flow rate of the odor gas is too low, tempering is easy to cause,

disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to provide a safe and efficient odor combustion device on the original alkali recovery boiler, and simultaneously, the combustion and the reaction of black liquor are not influenced.

The technical scheme of the utility model is realized like this:

the utility model provides a high enriched odor combustion device of alkali recovery boiler, including being used for carrying out the alkali recovery boiler that burns to the black liquor and carrying out the dissolving tank that connects greatly to the melt after the burning, the dissolving tank is located the rear end of alkali recovery boiler, alkali recovery boiler keeps away from the both sides of dissolving tank are equipped with the odor burner, the odor burner with alkali recovery boiler intercommunication, the odor burner is equipped with the odor intake pipe that introduces high enriched foul smell, liquid drop separator and spark arrester are installed to the outer end of odor intake pipe, and high enriched foul smell passes through in proper order enter into behind liquid drop separator and the spark arrester in the odor burner.

Preferably, the odor burners are symmetrically arranged on both sides of the alkali recovery boiler.

Preferably, the odor burner comprises a combustion cylinder, a fuel spray gun arranged in the combustion cylinder and an ignition device for igniting the fuel spray gun, wherein an air inlet pipe is arranged on the outer wall of the combustion cylinder, and the air inlet pipe is communicated with the interior of the combustion cylinder.

Preferably, be equipped with annular foul smell ring road in the section of thick bamboo that burns, the foul smell intake pipe with the foul smell ring road intercommunication, still be equipped with a plurality of foul smell pipelines in the section of thick bamboo that burns, the foul smell pipeline is in along the annular distribution around the fuel spray gun, the one end of foul smell pipeline with the foul smell ring road intercommunication, the other end is crooked and to the nozzle department of fuel spray gun.

Preferably, a stable combustion cover is arranged at the nozzle of the fuel spray gun.

Preferably, swirl vanes are arranged in the stable combustion cover.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a high enriched odor combustion device of alkali recovery boiler improves the inside temperature of furnace through the odor burner, carries out abundant burning decomposition to the odor. A liquid drop separator is additionally arranged on the odor air inlet pipe to remove the moisture in the odor; the pressure differential gauge has been arranged around the spark arrester, and the flow through adjusting low pressure steam controls the pressure differential around the spark arrester, prevents to lead to the tempering because the foul smell velocity of flow crosses lowly, improves the security of this device, sets up the high concentration foul smell combustor in the both sides of keeping away from the dissolving tank, can also effectively prevent that the furnace low temperature region that the foul smell burning decomposition caused in the furnace from producing adverse effect to the melt after the black liquor burning.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.

Fig. 1 is a schematic view of an internal structure of a first embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic view of the inner structure of the odor burner according to the second embodiment of the present invention.

In the figure, 1 alkali recovery boiler, 2 dissolving tank, 3 odor burner, 4 odor inlet pipe, 5 droplet separator, 6 flame arrester, 7 combustion cylinder, 81 ignition device, 82 fuel spray gun, 9 air inlet pipe, 10 odor loop, 11 odor pipeline, 12 stable combustion cover.

Detailed Description

In order to better understand the technical content of the present invention, the following embodiments are provided, and the present invention is further described with reference to the accompanying drawings.

Example one

Referring to fig. 1 to 2, the utility model provides a high-concentration odor combustion device of an alkali recovery boiler, which comprises an alkali recovery boiler 1 for combusting black liquor and a dissolving tank 2 for holding and receiving the melt after combustion, the dissolving tank 2 is positioned at the rear end of the alkali recovery boiler 1, odor burners 3 are arranged at two sides of the alkali recovery boiler 1 far away from the dissolving tank 2, the odor burner 3 is communicated with the alkali recovery boiler 1, the odor burner 3 is provided with an odor inlet pipe 4 for introducing high-concentration odor, drop separator 5 and spark arrester 6 are installed to the outer end of foul smell intake pipe 4, and high enriched foul smell passes through in proper order enter into behind drop separator 5 and the spark arrester 6 in the foul smell combustor 3, drop separator 5 and spark arrester 6 all can purchase current product through online shopping platforms such as jingdong, treasure or off-line entity shop according to actual need.

The device has two working modes, when the alkali recovery boiler 1 works normally, namely black liquor is combusted, the internal temperature of the hearth is higher, the full combustion temperature of odor is reached, the odor combustor 3 is not required to be started at the moment, the odor is directly introduced into the hearth through the odor inlet pipe 4 to be combusted and decomposed, the black liquor is combusted in the hearth, inorganic matters become flowable melts and flow into the dissolving tank 2 at the rear end, because the heat value of high-concentration odor is not high, about 8MJ/Nm3, if the high-concentration odor combustor 3 is arranged at the rear end of the boiler, the temperature of the area near the combustor is reduced after the high-concentration odor enters the hearth, the melts in the low-temperature area can flow unsmoothly, the reduction reaction which should be carried out by the melts can not be fully completed, and the mirabilite reduction rate and the green liquor quality of the alkali recovery boiler 1 are finally influenced. Therefore, the high-concentration odor burners 3 are arranged at two sides far away from the dissolving tank 2, so that the bad influence on the fused mass caused by the low-temperature area of the hearth due to the combustion and decomposition of the odor in the hearth is prevented; when the heat energy in the alkali recovery boiler 1 is not enough to sufficiently burn the odor, the odor burner 3 is turned on, and the temperature in the furnace is raised by the odor burner 3 to sufficiently burn and decompose the odor. Because the odor possibly carries partial moisture after entering the hearth, the moisture can absorb a large amount of heat, in order to improve the heat utilization rate, a liquid drop separator 5 is additionally arranged on the odor air inlet pipe 4 to remove the moisture in the odor; the pressure difference meter is arranged around the flame arrester 6, and the pressure difference around the flame arrester 6 is controlled through adjusting the flow of low pressure steam, so as to prevent tempering caused by too low flow rate of odor and improve the safety of the device.

The odor burners 3 are symmetrically arranged on both sides of the alkali recovery boiler 1. The alkali recovery boiler 1 is singly provided with the high-concentration odor burner 3, so that high-concentration odor is extremely easy to be discharged when the burner fails, and serious environmental pollution and personnel injury are caused, therefore, two groups of high-concentration odor burners 3 which are symmetrically arranged are still normally operated when one group of burners fails.

The odor burner 3 comprises a combustion cylinder 7, a fuel spray gun 82 and an ignition device 81, wherein the fuel spray gun 82 is arranged in the combustion cylinder, the ignition device 81 of the fuel spray gun 82 is ignited, an air inlet pipe 9 is arranged on the outer wall of the combustion cylinder 7, and the air inlet pipe is communicated with the inside of the combustion cylinder 7. The fuel lance 82 supplies fuel required for combustion, the air intake pipe 9 supplies oxygen required for combustion, and the fuel, oxygen and odor are mixed in the combustion liner 7 and ignited by the ignition device 81 to be combusted.

Be equipped with annular foul smell ring road 10 in the section of thick bamboo 7 of burning, foul smell intake pipe 4 with foul smell ring road 10 intercommunication, still be equipped with a plurality of foul smell pipelines 11 in the section of thick bamboo 7 of burning, foul smell pipeline 11 is in along the annular distribution fuel spray gun around, the one end of foul smell pipeline 11 with foul smell ring road 10 intercommunication, the other end is crooked and point to fuel spray gun's nozzle department. The even distribution of the odor in the combustion can 7 is enhanced by the plurality of odor ducts 11.

Example two

Referring to fig. 3, the present embodiment is different from the first embodiment in that a combustion stabilizing cover 12 is installed at the nozzle of the fuel spray gun.

Swirl vanes are arranged in the combustion stabilizing cover 12. The stable combustion cover 12 and the rotational flow blades generate rotational flow, air is sent into the hearth to be mixed and combusted with other gases, and the required air quantity can be adjusted according to fuel components and combustion conditions, so that the best combustion effect is achieved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a high concentration odor combustion device of boiler is retrieved to alkali, includes that the alkali that is used for carrying out the burning to the black liquor retrieves the boiler and carries out the dissolving tank that connects greatly to the fuse-element after the burning, a serial communication port, it is located to dissolve the tank the rear end of boiler is retrieved to alkali, alkali is retrieved the boiler and is kept away from the both sides of dissolving tank are equipped with the odor burner, the odor burner with the boiler intercommunication is retrieved to alkali, the odor burner is equipped with the odor intake pipe that introduces high concentration foul smell, droplet separator and spark arrester are installed to the outer end of odor intake pipe, and high concentration foul smell passes through in proper order enter into behind droplet separator and the spark arrester in the odor burner.

2. The high concentration odor gas combustion device of an alkali recovery boiler as claimed in claim 1, wherein said odor gas burners are symmetrically disposed on both sides of said alkali recovery boiler.

3. The high concentration odor gas combustion device of claim 2 wherein said odor gas burner comprises a combustion canister and a fuel lance mounted within said canister and an ignition device for igniting said fuel lance, an air inlet conduit is mounted to an outer wall of said combustion canister, said air inlet conduit communicating with the interior of said combustion canister.

4. The high concentration odor gas combustion device of an alkali recovery boiler, as claimed in claim 3, wherein an annular odor gas loop is provided in said combustion cylinder, said odor gas inlet pipe is connected to said odor gas loop, a plurality of odor gas pipes are provided in said combustion cylinder, said odor gas pipes are distributed around said fuel spray gun along an annular shape, one end of said odor gas pipe is connected to said odor gas loop, and the other end of said odor gas pipe is bent and directed to the nozzle of said fuel spray gun.

5. The high concentration odor gas combustion device of an alkali recovery boiler as claimed in claim 3, wherein a stable combustion cover is installed at the nozzle of the fuel spray gun.

6. The high concentration odor combustion device of an alkali recovery boiler as claimed in claim 5, wherein a swirl vane is arranged in the combustion stabilizing cover.