CN106765232B - Dry slag discharging and air locking system controlled by resistance variation trend - Google Patents
Dry slag discharging and air locking system controlled by resistance variation trend Download PDFInfo
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- CN106765232B CN106765232B CN201611169135.6A CN201611169135A CN106765232B CN 106765232 B CN106765232 B CN 106765232B CN 201611169135 A CN201611169135 A CN 201611169135A CN 106765232 B CN106765232 B CN 106765232B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/06—Mechanically-operated devices, e.g. clinker pushers
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Abstract
The invention provides a dry slag discharging air locking system which accurately reflects the material level in a slag hopper and has good air locking effect and is controlled by using the resistance change trend, and the dry slag discharging air locking system comprises a slag crusher, the slag hopper, a chain wheel machine, a hopper lifter and a controller, wherein a plurality of first pressure gauge pipes are arranged on the high-position inner side wall of the slag hopper, all the first pressure gauge pipes are positioned on the same horizontal plane, a first pressure gauge connected with the first pressure gauge pipes is arranged on the outer side wall of the slag hopper, a plurality of second pressure gauge pipes are arranged on the low-position inner side wall of the slag hopper, all the second pressure gauge pipes are positioned on the same horizontal plane, a second pressure gauge connected with the second pressure gauge pipes is arranged on the outer side wall of the slag hopper, each first pressure gauge pipe and each second pressure gauge pipe are respectively connected with an air supply device to realize the air supply device, each first pressure gauge and each second pressure gauge are electrically connected with the controller, and the controller records the pressure change of each first pressure gauge and each second pressure gauge pipe to form a material level opening or closing signal to control the chain wheel machine to operate or stop the operation.
Description
Technical Field
The invention relates to a dry slag removal air locking system controlled by resistance variation trend.
Background
The dry slag discharged from the boiler of the power station is often used for road repair, cement additive manufacturing, brick making and the like, the comprehensive utilization rate of the fly ash is improved, and an ash yard is cancelled.
The dry slag discharging system of the utility boiler has a link that ash slag discharged from a cold ash hopper of the utility boiler is conveyed to a slag bin, and the slag bin is directly communicated with the atmosphere for facilitating ash conveying and discharging. Because the cold ash bucket of the utility boiler has larger negative pressure, in order to prevent the atmospheric cold air from entering the hearth from the ash conveying channel, an air lock is arranged in the middle of the ash conveying channel. The existing air locking device is a clinker bucket arranged below a clinker crusher, a chain wheel machine is arranged at the lower part of the clinker bucket to convey clinker in the clinker bucket to a bucket elevator, and then the clinker is lifted to a clinker cabin by the clinker bucket of the bucket elevator. The working principle of the air lock is as follows: the ash storage blocking air leakage in the ash bucket is mainly utilized, when ash is located at a high position in the ash bucket, the material level switch is turned on, the chain wheel machine is turned on and conveys the ash to the bucket elevator, and when the ash in the ash bucket is located at a low position, the material level switch is turned off, the chain wheel machine stops, and the whole blocking air leakage is realized. The level switch is controlled by determining the level of the solid particulate material, for example, by using light, sound and a rotating member, detecting by using light transmittance and sound waves or placing the rotatable member at a high or low position, and when the material is filled, the rotating member stops rotating and outputs a signal. However, before ash enters the ash hopper, large slag is crushed by the alligator slag crusher, in order to adapt to large slag blocks, the gap between two rollers of the alligator slag crusher cannot be too small, so that ash particles falling into the ash hopper are large, deposits are loose and uneven, the accumulation state is uncertain, a plurality of gaps exist, the method has large errors and misjudgments, the material level switch fails, the chain wheel machine is in a continuous operation state to empty the ash hopper, and the effect of sealing and stopping wind is lost. In actual operation, in order to make up for the defects and further prevent air leakage into a hearth, the shutoff door of the furnace bottom ash cooling hopper is frequently opened and closed, firstly, the shutoff door is frequently opened and closed, and secondly, when large slag blocks and large slag amount are dropped, the outlet of the ash cooling hopper is easily blocked to cause safety accidents.
In view of the above, a new dry slag removal air-lock system is needed to overcome the above-mentioned drawbacks.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide the dry-slagging air-locking system which can accurately react the material level in the ash hopper, can accurately control the operation of a material level switch, has a good air-locking effect of an ash conveying channel and is controlled by the resistance change trend.
The invention relates to a dry slag discharging and air locking system controlled by resistance change trend, which comprises a power station boiler and a slag bin which are connected through a conveying channel, wherein the conveying channel is sequentially provided with a slag conveyor belt, a slag crusher, a slag hopper, a chain wheel machine and a bucket elevator along the flow direction of slag, the dry slag discharging and air locking system further comprises an external controller, the controller is electrically connected with the chain wheel machine and the bucket elevator and controls the chain wheel machine and the bucket elevator to operate or stop operating, a plurality of first pressure gauge pipes are arranged on the high-position inner side wall of the slag hopper, all the first pressure gauge pipes are positioned on the same horizontal plane, a first pressure gauge connected with the first pressure gauge pipes is arranged on the outer side wall of the slag hopper, a plurality of second pressure gauge pipes are arranged on the low-position inner side wall of the slag hopper, all the second pressure gauge pipes are positioned on the same horizontal plane, second pressure gauge pipes connected with the second pressure gauge pipes are arranged on the outer side wall of the slag hopper, each first pressure gauge pipe and each second pressure gauge pipe are respectively connected with an air supply device so as to realize that the chain wheel device controls the change of the level of the chain wheel machine, and each second pressure gauge is controlled by the opening and closing of each second pressure gauge, and controlling the signal of each chain wheel to control the second pressure gauge, and controlling the change of each chain wheel to form a signal recording device.
Furthermore, the distance from the first pressure gauge pipe to the bottom of the ash hopper is 1/2-4/5 times of the height of the ash hopper, and the first pressure gauge pipes are uniformly distributed on the inner peripheral side of the ash hopper.
Furthermore, the distance from the second pressure gauge pipe to the bottom of the ash hopper is 1/5-1/2 times of the height of the ash hopper, and the second pressure gauge pipes are uniformly distributed on the inner peripheral side of the ash hopper.
By means of the scheme, the invention at least has the following advantages: the method comprises the steps that air with certain pressure is introduced into a first pressure gauge pipe and a second pressure gauge pipe by an air supply device, ash can block the first pressure gauge pipe and the second pressure gauge pipe, so that when the first pressure gauge pipe or the second pressure gauge pipe is completely blocked by the ash, the air pressure in the gauge pipes rises, the corresponding first pressure gauge or the second pressure gauge can display an instant pressure value, a controller records the pressure value of the first pressure gauge or the second pressure gauge, concretely, the controller continuously samples the pressure value of the first pressure gauge on the same horizontal plane and processes the collected pressure value according to a normal distribution rule, when a peak of the normal curve is located in the middle, namely the position of the average and the average is close to the designated air pressure and serves as an action threshold value, the controller forms a material level opening signal to control the chain wheel machine to operate; the controller continuously samples the pressure value of the second pressure gauge on the same horizontal plane, processes the collected pressure value according to a normal distribution rule, and takes the pressure value as an action threshold value when the peak of a normal curve is positioned at the midpoint, namely the position of the mean number and the mean number is close to the original air pressure, and the controller forms a material level closing signal to control the chain wheel machine to stop running so as to store ash, block and lock air. The invention uses the air resistance change trend in the first pressure gauge pipe and the second pressure gauge pipe as the judgment criterion, the resistance change trend is only related to the amount of accumulated ash in front of the gauge pipes and is unrelated to the particle size of ash slag, the material level in the ash slag hopper can be accurately reflected, and the opening signal and the closing signal are formed, thereby achieving the purpose of accurately controlling the start and stop of the chain wheel machine.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of a dry slag removal air-lock system utilizing resistance trend control according to the present invention;
fig. 2 isbase:Sub>A schematic cross-sectional view atbase:Sub>A-base:Sub>A in fig. 1.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1-2, the dry slag discharging and air locking system using resistance change trend control of the present invention includes a utility boiler 1 and a slag bin 7 connected by a conveying passage, the conveying passage is sequentially provided with a slag conveyor 2, a slag crusher 4, a slag hopper 8, a chain wheel machine 5 and a bucket elevator 6 along a slag flow direction, the conveying passage is provided with a cooling device 3 at an adjacent conveyor 2, the system further includes an external controller, the controller is electrically connected with the chain wheel machine 5 and the bucket elevator 6 and controls the operation or stop of the chain wheel machine 5 and the bucket elevator 6, a plurality of first pressure gauge pipes 11 are provided on a high-position inner side wall of the slag hopper 8, all the first pressure gauge pipes 11 are on a same horizontal plane and a plurality of first pressure gauge pipes 11 are uniformly distributed on an inner circumferential side of the slag hopper 8, a distance from the first pressure gauge pipe 11 to the bottom of the slag hopper 8 is 3/5 times of the height of the slag hopper 8, a first pressure gauge pipe 11 connected with the first pressure gauge pipe 11 is provided on an outer side wall of the first pressure gauge pipe, a second pressure gauge pipe 12 is provided on a lower-position of the slag hopper 8, a second pressure gauge pipe is connected with a second pressure gauge pipe 12, a second pressure gauge pipe 12 connected with a second pressure gauge pipe 12 in the second pressure gauge pipe 12, the controller records the pressure change of each first pressure gauge and forms a material level opening signal to control the operation of the chain wheel machine 5 and the bucket elevator 6, and the controller records the pressure change of each second pressure gauge and forms a material level closing signal to control the operation of the chain wheel machine 5 and the bucket elevator 6 to stop.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (2)
1. The utility model provides an utilize dry-type sediment lock wind system of resistance variation trend control, includes power boiler (1) and sediment storehouse (7) connected through transfer passage, transfer passage is provided with lime-ash conveyer belt (2), ash crusher (4), ash hopper (8), sprocket machine (5) and bucket elevator (6) along the ash flow direction in proper order, its characterized in that: the automatic material level control device is characterized by further comprising an external controller, the controller is electrically connected with the chain wheel machine (5) and the bucket elevator (6) and controls the chain wheel machine (5) and the bucket elevator (6) to run or stop running, a plurality of first pressure gauge pipes (11) are arranged on the high-position inner side wall of the ash bucket (8), all the first pressure gauge pipes (11) are located on the same horizontal plane, first pressure gauges connected with the first pressure gauge pipes (11) are arranged on the outer side wall of the ash bucket (8), a plurality of second pressure gauge pipes (12) are arranged on the low-position inner side wall of the ash bucket (8), all the second pressure gauge pipes (12) are located on the same horizontal plane, second pressure gauges connected with the second pressure gauge pipes (12) are arranged on the outer side wall of the ash bucket (8), each first pressure gauge pipe (11) and each second pressure gauge pipe (12) are respectively connected with an air supply device to enable the air supply device to supply air into each first pressure gauge pipe (12), each second pressure gauge pipe (11) and each second pressure gauge pipe (12) are respectively connected with the air supply device to control the chain wheel machine to open and close the pressure gauges, and control signals of the chain wheel machine are recorded, and each first pressure gauge (5) are controlled by the second pressure gauge and each second pressure gauge is controlled to be controlled by the chain wheel machine, and each second pressure gauge is controlled to be controlled, and the chain wheel machine, and each second pressure gauge is controlled to be controlled, and each chain wheel machine is controlled; the distance between the second pressure gauge pipes (12) and the bottom of the ash hopper (8) is 1/5-1/2 times of the height of the ash hopper (8), and the second pressure gauge pipes (12) are uniformly distributed on the inner peripheral side of the ash hopper (8).
2. The dry slag removal air-lock system controlled by the resistance variation trend according to claim 1, wherein: the distance from the first pressure gauge pipe (11) to the bottom of the ash hopper (8) is 1/2-4/5 times of the height of the ash hopper (8), and the first pressure gauge pipes (11) are uniformly distributed on the inner peripheral side of the ash hopper (8);
the controller records the pressure change of each first pressure gauge and forms a material level opening signal to control the chain wheel machine (5) to operate, and the method specifically comprises the following steps: the controller continuously samples the pressure value of the first pressure gauge on the same horizontal plane, processes the acquired pressure value according to a normal distribution rule, and when the peak of a normal curve is positioned at the midpoint, namely the position of the mean, and the mean is close to the designated air pressure, the peak is used as an action threshold value, and the controller forms a material level opening signal to control the chain wheel machine to operate;
the controller records the pressure change of each second pressure gauge and forms a material level closing signal to control the chain wheel machine (5) to stop running, and the method specifically comprises the following steps: the controller continuously samples the pressure value of the second pressure gauge on the same horizontal plane, processes the collected pressure value according to a normal distribution rule, and takes the pressure value as an action threshold value when the peak of a normal curve is positioned at the midpoint, namely the position of the mean number and the mean number is close to the original air pressure, and the controller forms a material level closing signal to control the chain wheel machine to stop running so as to store ash, block and lock air.
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| CN201611169135.6A CN106765232B (en) | 2016-12-16 | 2016-12-16 | Dry slag discharging and air locking system controlled by resistance variation trend |
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| CN201611169135.6A CN106765232B (en) | 2016-12-16 | 2016-12-16 | Dry slag discharging and air locking system controlled by resistance variation trend |
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| CN106765232B true CN106765232B (en) | 2023-04-07 |
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