CN109654527B - Uniform coal feeding device of three-waste mixed combustion furnace - Google Patents

Uniform coal feeding device of three-waste mixed combustion furnace Download PDF

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Publication number
CN109654527B
CN109654527B CN201811506085.5A CN201811506085A CN109654527B CN 109654527 B CN109654527 B CN 109654527B CN 201811506085 A CN201811506085 A CN 201811506085A CN 109654527 B CN109654527 B CN 109654527B
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Prior art keywords
coal
combustion furnace
mixed combustion
coal feeding
auger
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CN201811506085.5A
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CN109654527A (en
Inventor
孙彩军
翟美江
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Anhui Jinhe Industrial Co Ltd
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Anhui Jinhe Industrial Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/16Over-feed arrangements
    • F23K3/18Spreader stokers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00Methods of steam generation characterised by form of heating method
    • F22B1/02Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/06Arrangements of devices for treating smoke or fumes of coolers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N1/00Regulating fuel supply
    • F23N1/005Regulating fuel supply using electrical or electromechanical means

Abstract

The invention discloses a coal feeding device in the production of a three-waste mixed combustion furnace, which comprises a mixed combustion furnace and a coal feeder, wherein the coal feeder conveys coal materials into the mixed combustion furnace, and is characterized in that: two coal feeding ports are arranged on the left side of the mixed combustion furnace, two coal feeding ports are also arranged on the right side of the mixed combustion furnace, each coal feeding port is connected with a coal feeder, and the height of each coal feeding port is higher than the height of the horizontal central point of the mixed combustion furnace; the coal feeders are arranged on the two sides of the mixed combustion furnace, so that coal is not easily delivered to a coal burning area in production and is uniformly fed, the temperature of a hearth is easy to control, the operation is simple and convenient, and the production is stable.

Description

Uniform coal feeding device of three-waste mixed combustion furnace
Technical Field
The invention relates to the technical field of process equipment of a three-waste mixed combustion furnace, in particular to a uniform coal feeding device in production of the three-waste mixed combustion furnace.
Background
In recent years, due to the improvement of the happiness index of the people, the requirement on ecological environment protection is higher, the environmental protection situation of chemical enterprises is severe, the waste gas, waste residue and the like generated by the chemical enterprises are prevented from being discharged randomly, and the generated waste gas, waste residue and the like are reutilized and changed into valuables. Meanwhile, as the technology of the domestic three-waste mixed combustion furnace is mature day by day, and various chemical enterprises are newly started to take a lot of projects in recent years.
In the production of the three-waste mixed combustion furnace, the diameter of a hearth of the combustion furnace is mostly phi 5400mm, the diameter is designed to be phi 6000mm according to the production condition requirements of the company, a 500mm partition wall is built in the middle of the hearth, 1#, 2#, 3#, and 4# coal supply ports are arranged on one side of the hearth of the combustion furnace in the original design, the coal supply height is 1300mm, in the actual operation process, coal is thrown into the hearth under the action of coal supply air, part of the coal is operated to the opposite side of the coal supply port of the hearth under the action of airflow blown by an air cap, and due to the large hearth, when the coal is fluidized to the other side of the coal supply port, the temperature of the other side of the coal supply port is low due to time and combustion reasons, the furnace condition is difficult.
In addition, the existing three waste furnaces are circular hearths, the air distribution mode of the double air chambers is adopted, four spiral coal feeders are distributed around the combustion furnace, and each spiral coal feeder is provided with a flat belt coal feeding system. The spiral coal feeder is driven by a motor, the middle of the spiral coal feeder is connected with a copying wheel, and the body part of the spiral coal feeder is supported by a bearing and continuously operates to push coal into a combustion furnace for combustion. Because the sleeve of the spiral coal feeder is totally enclosed, coal is supplied to be bonded and accumulated in the sleeve, the abrasion and the coal supply resistance of the spiral coal supply auger are increased, particularly when coal tide and poor-quality coal and slag are doped, the condition is more serious, and hidden danger is brought to the safe operation of the spiral coal feeder. At present, the service cycle of each spiral coal feeder is about 2 months, the temperature of a corresponding point is difficult to maintain every time when an auger of the spiral coal feeder is broken, the load can be maintained only by manually feeding coal in time, and the furnace can be extinguished due to temperature collapse caused by slight carelessness, so that the problem of solving the same is particularly important.
Disclosure of Invention
Aiming at the problems, the invention provides the uniform coal feeding device of the three-waste mixed combustion furnace, which is characterized in that coal feeders are arranged on two sides of the mixed combustion furnace, so that coal is not easily fed to a coal burning area in production and is uniformly fed, the temperature of a hearth is easy to control, the operation is simple and convenient, and the production is stable.
In order to solve the problems, the invention provides a coal feeding device in the production of a three-waste mixed combustion furnace, which comprises the mixed combustion furnace and a coal feeder, wherein the coal feeder conveys coal materials into the mixed combustion furnace, and the coal feeding device is characterized in that: the left side of the mixed combustion furnace is provided with two coal feeding ports, the right side of the mixed combustion furnace is also provided with two coal feeding ports, each coal feeding port is connected with a coal feeder, and the height of each coal feeding port is higher than the height of the horizontal central point of the mixed combustion furnace.
The further improvement lies in that: the position of the coal feeder is placed according to the site requirement.
The further improvement lies in that: the coal feeder comprises a motor and an auger, the motor drives the auger to operate, the outer side of the auger is coated with a closed sleeve, and a coal bunker is arranged above the sleeve.
The further improvement lies in that: the coal bunker is internally provided with a humidity sensor, the sleeve is internally provided with an electromagnetic pneumatic injection valve at intervals, and the humidity sensor and the electromagnetic pneumatic injection valve are both connected to a PLC (programmable logic controller).
The further improvement lies in that: the air source of the electromagnetic pneumatic blowing valve is supplied by instrument air, and the pressure is 0.4-0.8 MPa.
The further improvement lies in that: the electromagnetic pneumatic blowing valve comprises three working modes, namely a low-frequency mode, a medium-frequency mode and a high-frequency mode.
The further improvement lies in that: in the low frequency mode, the blowing time interval is 100s, and each blowing time is 0.3s, and is indicated by a yellow indicator light.
The further improvement lies in that: in the medium frequency mode, the blowing time interval is 50s, and each blowing time is 0.5s and is indicated by a green indicator light.
The further improvement lies in that: in the high frequency mode, the blowing time interval is 20s, and each blowing time is 0.8s, and is indicated by a red indicator light.
The invention has the beneficial effects that: the coal feeders are arranged on the two sides of the mixed combustion furnace, so that the coal feeding from one side of the hearth of the mixed combustion furnace to the fluidization in the hearth is changed into the multi-point uniform fluidization conveying of the coal, the coal distribution is more reasonable, the time for the coal to reach all parts of the hearth is short, the temperature at all parts is easier to control, the operation is simpler, the adjusting means are more, the operation time of the coal is far more than that of other equipment, and the equipment can continuously run for a long period, and the advantages are summarized as follows:
1. after the invention is reformed, four-point coal feeding is adopted, the coal feeding points are uniform, the coal throwing position is increased under the action of coal feeding wind, the falling point is more reasonable, and the time for the coal to reach each point of the hearth to participate in combustion is shortened; the temperature in the hearth is more uniform, and the operation difficulty is reduced;
2. the running stability of the equipment is improved, and the conditions of coking and fire breaking are avoided;
3. the labor intensity is reduced, and the production cost is saved.
4. The invention has the function of automatic blockage removal, and can prevent the problems of frequent coal blockage of the auger, serious abrasion, short service life, large abnormal coal feeding sound of the coal feeder, high-load operation heating of the motor and the like from the source.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a structural view of the coal feeder of the present invention.
Wherein: 1-a mixed combustion furnace, 2-a coal feeder, 3-a coal feeding port, 4-a motor, 5-a packing auger, 6-a sleeve, 7-a coal bunker, 8-a humidity sensor and 9-an electromagnetic pneumatic injection valve.
Detailed Description
In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
Example one
As shown in fig. 1 and 2, the present embodiment provides a uniform coal feeding device for a three-waste mixed combustion furnace, which includes a mixed combustion furnace 1 and a coal feeder 2, wherein the coal feeder 2 conveys coal materials into the mixed combustion furnace 1, two coal feeding ports 3 are arranged on the left side of the mixed combustion furnace 1, two coal feeding ports 3 are also arranged on the right side of the mixed combustion furnace, each coal feeding port 3 is connected with the coal feeder 2, and the height of each coal feeding port 3 is higher than the height of the horizontal central point of the mixed combustion furnace 1. In this embodiment, the height of the coal feeding port is 1900mm, and the diameter of the furnace chamber of the combustion furnace is phi 6000 mm.
In the production of the three-waste mixed combustion furnace, fire coal is uniformly thrown into a hearth and is combusted under the heating action of 780-800 ℃ high-temperature slag, the temperature in the hearth is 970 +/-20 ℃, generated high-temperature flue gas is discharged to the rear section under the action of a draught fan, and heat exchange is carried out with desalted water in a water wall pipe in the discharging process, so that the purpose of generating steam is achieved.
The coal feeders are arranged on two sides of the mixed combustion furnace, four-point coal feeding is adopted, coal feeding is changed into multi-point uniform fluidization conveying coal from one side of a hearth of the mixed combustion furnace to the inner fluidization of the hearth, so that the coal distribution is more reasonable, the time for the coal to reach the hearth is short, the temperature at each part is easier to control, the operation is simpler, the adjusting means is more, the operation time of other equipment is far exceeded, and the equipment can continuously run for a long period.
Example two
As shown in figure 3, the coal feeder 2 comprises a motor 4 and an auger 5, the auger 5 is driven by the motor 4 to operate, a closed sleeve 6 is coated outside the auger 5, and a coal bunker 7 is arranged above the sleeve 6. A humidity sensor 8 is arranged in the coal bunker 7, electromagnetic pneumatic injection valves 9 are arranged in the sleeve 6 at intervals of 400mm, and the motor 4, the humidity sensor 8 and the electromagnetic pneumatic injection valves 9 are all connected to a PLC (programmable logic controller). The air source of the electromagnetic pneumatic blowing valve 9 is supplied by instrument air, and the pressure is 0.6 MPa. The electromagnetic pneumatic blowing valve 9 comprises three working modes, namely a low-frequency mode, a medium-frequency mode and a high-frequency mode. In the low frequency mode, the blowing time interval is 100s, and each blowing time is 0.3s, and is indicated by a yellow indicator light. In the medium frequency mode, the blowing time interval is 50s, and each blowing time is 0.5s and is indicated by a green indicator light. In the high frequency mode, the blowing time interval is 20s, and each blowing time is 0.8s, and is indicated by a red indicator light.
The invention has the function of automatic blockage removal, and can prevent the problems of frequent coal blockage of the auger, serious abrasion, short service life, large abnormal coal feeding sound of the coal feeder, high-load operation heating of the motor and the like from the source.
According to the current three-waste furnace operation condition and coal test report, the water content is about 10%, and the current of the spiral coal feeder is about 7.0A. When the moisture is less than 8% or the current is less than 6.5A, the DSC control system automatically switches to a low-frequency working mode; when the moisture is 8% -12% or the current is 6.5A-7.5A, the control system automatically switches to the intermediate frequency working mode; when the moisture is more than 12% or the current is more than 7.5A, the control system automatically switches to a high-frequency working mode.
The upper opening of each spiral auger is provided with three electromagnetic pneumatic injection valves 9 which are respectively connected to a DCS control system, the current of a motor 4 of each auger 5 is also connected, and meanwhile, a humidity sensor 8 of the coal bunker is simultaneously connected to a PLC controller of the DCS control system; when the control system detects the change of the current of the auger, the injection frequency is started according to the current, and the injection frequency is dynamically adjusted according to the current of the auger motor and the data of the humidity sensor of the coal bunker so as to keep the automatic cleaning and blowing system to save energy and have high efficiency; the invention realizes the high-efficiency blockage removal of the coal feeding device, greatly prolongs the service cycle of the coal feeding device, and eliminates the production influence of equipment damage and coal breakage, temperature collapse and furnace extinguishment caused by packing auger blockage by damp coal. The operation efficiency of the boiler is improved, and the workload of maintenance and operation is reduced.

Claims (7)

1. The utility model provides a three wastes mix-combustion stove is coal feeding device evenly, includes mix-combustion stove (1) and coal feeder (2), by coal feeder (2) carry the coal charge to mix-combustion stove (1) in, its characterized in that: two coal feeding ports (3) are arranged on the left side of the mixed combustion furnace (1), two coal feeding ports (3) are also arranged on the right side of the mixed combustion furnace, each coal feeding port (3) is connected with a coal feeder (2), and the height of each coal feeding port (3) is higher than the height of the horizontal central point of the mixed combustion furnace (1); the coal feeder (2) comprises a motor (4) and an auger (5), the auger (5) is driven to operate by the motor (4), a closed sleeve (6) is wrapped on the outer side of the auger (5), a coal bunker (7) is arranged above the sleeve (6), a humidity sensor (8) is arranged in the coal bunker (7), electromagnetic pneumatic injection valves (9) are arranged in the sleeve (6) at intervals, and the motor (4), the humidity sensor (8) and the electromagnetic pneumatic injection valves (9) are all connected to a PLC (programmable logic controller); the upper opening of each spiral auger is provided with three electromagnetic pneumatic injection valves (9) which are respectively connected to a DCS control system, the current of a motor (4) of each auger (5) is also connected, and meanwhile, a humidity sensor (8) of the coal bunker is simultaneously connected to a PLC controller of the DCS control system; when the control system detects the change of the current of the auger, the injection frequency is started according to the current, and the injection frequency is dynamically adjusted according to the current of the auger motor and the data of the humidity sensor of the coal bunker.
2. The uniform coal feeding device of the three-waste mixed combustion furnace according to claim 1, characterized in that: the position of the coal feeder (2) is placed according to the site requirement.
3. The uniform coal feeding device of the three-waste mixed combustion furnace according to claim 1, characterized in that: the air source of the electromagnetic pneumatic blowing valve (9) is supplied by instrument air, and the pressure is 0.4-0.8 MPa.
4. The uniform coal feeding device of the three-waste mixed combustion furnace according to claim 1, characterized in that: the electromagnetic pneumatic blowing valve (9) comprises three working modes, namely a low-frequency mode, a medium-frequency mode and a high-frequency mode.
5. The uniform coal feeding device of the three-waste mixed combustion furnace of claim 4, which is characterized in that: in the low frequency mode, the blowing time interval is 100s, and each blowing time is 0.3s and indicated by a yellow indicator lamp.
6. The uniform coal feeding device of the three-waste mixed combustion furnace of claim 4, which is characterized in that: in the medium frequency mode, the blowing time interval is 50s, and each blowing time is 0.5s and is indicated by a green indicator light.
7. The uniform coal feeding device of the three-waste mixed combustion furnace of claim 4, which is characterized in that: in the high frequency mode, the blowing time interval is 20s, and each blowing time is 0.8s, and is indicated by a red indicator light.
CN201811506085.5A 2018-12-10 2018-12-10 Uniform coal feeding device of three-waste mixed combustion furnace Active CN109654527B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811506085.5A CN109654527B (en) 2018-12-10 2018-12-10 Uniform coal feeding device of three-waste mixed combustion furnace

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Application Number Priority Date Filing Date Title
CN201811506085.5A CN109654527B (en) 2018-12-10 2018-12-10 Uniform coal feeding device of three-waste mixed combustion furnace

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CN109654527A CN109654527A (en) 2019-04-19
CN109654527B true CN109654527B (en) 2020-05-05

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0759709B2 (en) * 1987-09-03 1995-06-28 三井鉱山株式会社 How to control the humidity of coal
KR20120018466A (en) * 2010-08-23 2012-03-05 한국에너지기술연구원 Feed equipment of low rank coal with high moisture
CN201808842U (en) * 2010-09-14 2011-04-27 新会双水发电(B厂)有限公司 Coal bucket coal injection device
CN102901090B (en) * 2011-07-26 2015-02-11 中国科学院工程热物理研究所 Large circulating fluidized bed boiler having cyclone separators
CN202880189U (en) * 2012-11-14 2013-04-17 张金才 Vertical single rotary raw coal bunker dredging device
CN205820280U (en) * 2016-06-29 2016-12-21 陈玉 A kind of feeder
CN207214030U (en) * 2017-09-20 2018-04-10 东方电气集团东方锅炉股份有限公司 A kind of coal supply system for using low calorie fuels CFBB

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