CN212236714U - Dosing device based on operation condition of desulfurization tower of coal-fired unit - Google Patents
Dosing device based on operation condition of desulfurization tower of coal-fired unit Download PDFInfo
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- CN212236714U CN212236714U CN202022104978.6U CN202022104978U CN212236714U CN 212236714 U CN212236714 U CN 212236714U CN 202022104978 U CN202022104978 U CN 202022104978U CN 212236714 U CN212236714 U CN 212236714U
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Abstract
The utility model relates to a dosing device based on the operation condition of a desulfurization tower of a coal-fired unit, which comprises a driving motor, a charging bucket, a discharging pipe, an expansion joint, a screw feeder, a weighing platform and a slurry pool in the desulfurization tower region; a driving motor is arranged above the material tank and connected with the spiral stirring rod in the material tank; the lower part of the charging bucket is connected with a discharging pipe, the upper part of the discharging pipe is provided with an electric discharging valve, the lower part of the discharging pipe is provided with an expansion joint, one side of the discharging pipe is communicated with a compressed air pipe, and the compressed air pipe is provided with a compressed air purging valve; the bottom of the expansion joint is connected with a feeding port of a screw feeder, the screw feeder is fixed on the weighing platform, a discharging port of the screw feeder is connected with an inlet of a slurry pool of the desulfurizing tower area, and an area slurry pool stirrer is arranged in the slurry pool of the desulfurizing tower area. The utility model has the advantages that: the utility model discloses set up the platform of weighing, the online measurement adds the dose, obtains actually adding the dose through measurement screw feeder mass variation, has improved and has added the dose accuracy.
Description
Technical Field
The utility model relates to a charge device, concretely relates to charge device based on coal-fired unit desulfurizing tower operating condition.
Background
The flue gas desulfurization process of coal-fired units in China currently adopts limestone-gypsum wet desulfurization, and the process has the advantages of stable operation, high desulfurization efficiency and wide coal application range. The desulfurization efficiency of the desulfurizing tower influences the running economy of the unit and the standard reaching of the environmental emission, and the insufficient desulfurization efficiency can cause the SO of the flue gas of the coal-fired unit2And (5) excessive emission. The daily operation can ensure the SO in the flue gas by increasing a slurry circulating pump, reducing the load, and the like2The desulfurization synergist reaches the standard and is required to be added in proper time under the special conditions of slurry foaming, slurry poisoning, coal sulfur content exceeding the design value and the like to ensure the generating benefit of a unit and the requirement of environmental protection examination.
At present, most coal-fired units directly add desulfurization synergist through manpower, the addition amount is extensive, and certain hysteresis exists at the addition time point, thus influencing the stable operation of the units. Individual synergist feeding devices only solve the problems of human resources and water supply, and preliminary automation capacity is realized.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the deficiencies in the prior art and providing a charge device based on coal-fired unit desulfurizing tower operating condition.
The dosing device based on the operation condition of the desulfurization tower of the coal-fired unit comprises a driving motor, a charging bucket, a discharging pipe, an expansion joint, a screw feeder, a weighing platform and a slurry pool in the desulfurization tower region; a driving motor is arranged above the material tank and connected with the spiral stirring rod in the material tank; the lower part of the charging bucket is connected with a discharging pipe, the upper part of the discharging pipe is provided with an electric discharging valve, the lower part of the discharging pipe is provided with an expansion joint, one side of the discharging pipe is communicated with a compressed air pipe, and the compressed air pipe is provided with a compressed air purging valve; the bottom of the expansion joint is connected with a feeding hole of a screw feeder, the screw feeder is fixed on a weighing platform, a discharging hole of the screw feeder is connected with an inlet of a slurry pool of the desulfurizing tower region, a stirrer of the slurry pool of the desulfurizing tower region is arranged in the slurry pool of the desulfurizing tower region, and an outlet of the slurry pool of the desulfurizing tower region is connected to the desulfurizing tower through a pump of the slurry pool of the region; the driving motor, the electric discharge valve and the screw feeder are all connected with the controller.
Preferably, the method comprises the following steps: transparent monitoring holes are arranged on the lateral surface of the vertebral body at the lower part of the charging bucket.
Preferably, the method comprises the following steps: the feed inlet of the screw feeder is connected with the discharge pipe through an expansion joint in a non-bearing way.
Preferably, the method comprises the following steps: the weighing platform is fixed on the flat ground beside the slurry pool in the desulfurizing tower area.
Preferably, the method comprises the following steps: the discharge port of the screw feeder is positioned right above the slurry pool of the desulfurizing tower region and is higher than the ground level around the slurry pool of the desulfurizing tower region.
Preferably, the method comprises the following steps: and a cover plate is arranged on the slurry pool in the desulfurizing tower area.
Preferably, the method comprises the following steps: the screw feeder horizontally inclines for a certain angle, and the discharge port of the screw feeder is lower than the feed port.
The utility model has the advantages that: the utility model discloses set up material jar, weighing platform, screw feeder and compressed air pipe, the weighing platform is used for the measurement to add the dose, obtains actually adding the dose through measurement screw feeder mass variation, has improved and has added the dose accuracy, leads to compressed air simultaneously and sweeps and can prevent the medicament at the inside scale deposit of equipment.
Drawings
FIG. 1 is a schematic diagram of a dosing device based on the operating condition of a desulfurization tower of a coal-fired unit.
Description of reference numerals: 1. a drive motor; 2. a spiral stirring rod; 3. a charging bucket; 4. an electric discharge valve; 5. a discharge pipe; 6. a compressed air purge valve; 7. a screw feeder; 8. a regional slurry tank agitator; 9. an expansion joint; 10. a weighing platform; 11. a controller; 12. a desulfurization tower zone slurry tank; 13. regional slurry pond pumps.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Example one
The dosing device based on the operation condition of the desulfurization tower of the coal-fired unit solves the problem of controlling the addition amount of the synergist, realizes that an operator adds the desulfurization synergist without delay according to the environment-friendly operation condition of the unit, automatically calculates the economic comparison between the slurry circulation pump and the desulfurization synergist under the specific operation condition, and guides the operator to operate. The device comprises a driving motor 1, a charging bucket 3, a discharging pipe 5, an expansion joint 9, a screw feeder 7, a weighing platform 10 and a desulfurizing tower area slurry pool 12; a driving motor 1 is arranged above the charging bucket 3, and the driving motor 1 is connected with a spiral stirring rod 2 in the charging bucket 3; a discharge pipe 5 is connected below the charging bucket 3, an electric discharge valve 4 is arranged on the upper portion of the discharge pipe 5, an expansion joint 9 is arranged on the lower portion of the discharge pipe 5, a compressed air pipe is communicated with one side of the discharge pipe 5, a compressed air purging valve 6 is arranged on the compressed air pipe, and compressed air can purge the discharge pipe 5, the expansion joint 9 and the screw feeder 7 through the compressed air purging valve 6; the feed inlet of screw feeder 7 is connected to expansion joint 9 bottom, screw feeder 7 is fixed in on weighing platform 10, the 12 entrys in desulfurizing tower region thick liquid pond are connected to the discharge gate of screw feeder 7, be equipped with regional thick liquid pond agitator 8 in the desulfurizing tower region thick liquid pond 12, the export in desulfurizing tower region thick liquid pond 12 is connected to the desulfurizing tower through regional thick liquid pond pump 13, the medicament adds desulfurizing tower region thick liquid pond 12 through screw feeder 7, throw into the desulfurizing tower by regional thick liquid pond pump 13 after regional thick liquid pond agitator 8 stirs the mixture again, the overall process is by controller 11 through PLC automatic control. The driving motor 1, the electric discharging valve 4 and the screw feeder 7 are all connected with a controller 11.
Transparent detection holes are formed in the side face of the lower vertebral body of the charging bucket 3, so that the inspection of the medicament condition at regular intervals is facilitated, and the synergist is supplemented timely. The charging bucket 3 is fixed on the frame.
The driving motor 1 drives the spiral stirring rod to rotate, so that the medicament can be crushed to a certain degree, the medicament is prevented from absorbing water and being agglomerated, and the discharging reliability of the device is facilitated.
Compressed air (from the main compressed air pipe in the plant area) can blow the discharge pipe 5, the expansion joint 9 and the screw feeder 7 through the compressed air blow-down valve 6, so that the medicament is prevented from scaling inside.
The screw feeder 7 is fixed on the weighing platform 10, the feed inlet of the screw feeder 7 is connected with the discharge pipe 5 through the expansion joint 9 in a non-bearing mode, the basis weight signal of the weighing platform 10 is only the weight of the screw feeder 7 and the expansion joint 9, the weighing platform 10 can measure the weight change before and after discharging, and the weight change value is the addition amount of the medicament. The weighing platform 10 is fixed on a level ground beside the slurry tank 12 in the area of the desulfurization tower.
The discharge hole of the screw feeder 7 is positioned right above the area slurry pool 12 of the desulfurizing tower and is slightly higher than the ground level around the area slurry pool. And a cover plate is arranged on the slurry tank 12 in the desulfurizing tower area to prevent personnel from falling into the tank due to passing by.
The screw feeder 7 horizontally inclines by 15 degrees, and a discharge hole of the screw feeder is lower than a feed inlet, so that the screw feeder is favorable for blanking.
The controller 11 controls the switch of the electric discharge valve 4, the start and stop of the screw feeder 7 and the start and stop of the driving motor 1 according to the weight signal of the weighing platform 10 and the operation condition of the desulfurization tower of the unit.
The controller 11 calculates the closing time of the electric discharge valve 4 in advance according to the linear change of the weight signal, so that the dosing error is reduced; and the multiple drug adding amount is calculated in an accumulated way, so that the operator is assisted in accounting the drug consumption.
The volume of the slurry pool 12 in the desulfurizing tower area is 27m3The output of the screw feeder 7 is 1t/h, the inner diameter of the discharge pipe 5 is 150mm, and the volume of the charging bucket 3 is about 2m3。
Example two
The dosing method of the dosing device based on the operation condition of the desulfurization tower of the coal-fired unit comprises the following steps:
s1, during dosing, weighing platform 10 initial weight signal M, an operator sets a required dosing amount M1, controller 11 controls electric discharge valve 4 to be opened, desulfurization synergist falls to screw feeder 7 through discharge pipe 5, electric discharge valve 4 is closed after target amount is reached, weighing platform 10 weight signal M2 is obtained, screw feeder 7 is started to feed to desulfurizing tower area slurry pool 12, feeding completion is judged according to weighing platform 10 weight signal M3 (M3 should be almost equal to M), and actual dosing amount M2-M3(M2-M3 should be almost equal to M1) is calculated.
S2, adding the reagent into the desulfurizing tower area slurry pool 12 through the screw feeder 7, stirring and mixing the reagent through the area slurry pool stirrer 8, pumping the mixture into the desulfurizing tower through the area slurry pool pump 13, and automatically controlling the whole process through the PLC by the controller 11.
S3, after the medicine is added at each time, the electric discharge valve 4 can be closed, the compressed air purging valve 6 is opened to purge the discharge pipe 5, the expansion joint 9 and the screw feeder 7, and the medicine residue is reduced to form scale inside.
S4, based on the operation condition of the desulfurizing tower, the operation personnel is guided to select a relatively energy-saving and economical mode to operate by calculating and comparing the dosing cost and the power consumption cost of the slurry circulating pump (2 h is used as a calculation period), wherein: the dosing cost is the unit price (yuan/kg) of the medicament and the dosing mass (kg); the power consumption cost of the slurry circulating pump X is X pump power (kW) time (h) electricity price (yuan/kWh), the desulfurization system generally comprises 4-5 slurry circulating pumps with the numbers of A, B, C, D … … respectively, wherein X refers to each slurry circulating pump, and the operation of operators is guided by calculating the power consumption of each slurry circulating pump.
Compared with the scheme that the fluidized air mode is adopted to assist the material tank in discharging and the like, the device is reasonable in structure, reliable in work, capable of saving labor cost, capable of reducing the time of medicament preparation, task arrangement manual carrying and medicament adding processes and capable of guaranteeing no delay medicament adding under the special conditions that slurry is foamed, slurry is poisoned, the sulfur content of coal exceeds the design value and the like. And the device calculates the cost according to the adding amount, compares the cost with the power consumption cost of a slurry circulating pump in operation, guides an energy-saving control strategy, plays a certain role in guiding the operation personnel to realize the energy-saving operation of the unit environment-friendly equipment, and improves the economy of a desulfurization system. Meanwhile, the whole process of the device is automatically controlled by a controller through a PLC (programmable logic controller), so that the automatic dosing remote control is realized, and the operation of the dosing device is controlled in an online full-automatic manner.
Claims (7)
1. The utility model provides a charge device based on coal-fired unit desulfurizing tower operating condition which characterized in that: the device comprises a driving motor (1), a charging bucket (3), a discharging pipe (5), an expansion joint (9), a screw feeder (7), a weighing platform (10) and a desulfurizing tower area slurry pool (12); a driving motor (1) is arranged above the charging bucket (3), and the driving motor (1) is connected with a spiral stirring rod (2) in the charging bucket (3); a discharge pipe (5) is connected below the charging bucket (3), an electric discharge valve (4) is arranged at the upper part of the discharge pipe (5), an expansion joint (9) is arranged at the lower part of the discharge pipe (5), one side of the discharge pipe (5) is communicated with a compressed air pipe, and a compressed air purging valve (6) is arranged on the compressed air pipe; the bottom of the expansion joint (9) is connected with a feed inlet of a screw feeder (7), the screw feeder (7) is fixed on a weighing platform (10), a discharge outlet of the screw feeder (7) is connected with an inlet of a desulfurizing tower region slurry pool (12), a region slurry pool stirrer (8) is arranged in the desulfurizing tower region slurry pool (12), and an outlet of the desulfurizing tower region slurry pool (12) is connected to a desulfurizing tower through a region slurry pool pump (13); the driving motor (1), the electric discharge valve (4) and the screw feeder (7) are all connected with a controller (11).
2. The dosing device based on the operating condition of the desulfurization tower of the coal-fired unit according to claim 1, characterized in that: the side surface of the lower vertebral body of the charging bucket (3) is provided with a transparent monitoring hole.
3. The dosing device based on the operating condition of the desulfurization tower of the coal-fired unit according to claim 1, characterized in that: the feed inlet of the screw feeder (7) is connected with the discharge pipe (5) in a non-bearing way through an expansion joint (9).
4. The dosing device based on the operating condition of the desulfurization tower of the coal-fired unit according to claim 1, characterized in that: the weighing platform (10) is fixed on the flat ground beside the slurry pool (12) in the area of the desulfurizing tower.
5. The dosing device based on the operating condition of the desulfurization tower of the coal-fired unit according to claim 1, characterized in that: the discharge hole of the screw feeder (7) is positioned right above the desulfurizing tower area slurry pool (12) and is higher than the ground level around the desulfurizing tower area slurry pool (12).
6. The dosing device based on the operating condition of the desulfurization tower of the coal-fired unit according to claim 1, characterized in that: a cover plate is arranged on the slurry pool (12) in the desulfurizing tower area.
7. The dosing device based on the operating condition of the desulfurization tower of the coal-fired unit according to claim 1, characterized in that: the screw feeder (7) horizontally inclines at a certain angle, and the discharge hole of the screw feeder is lower than the feed hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022104978.6U CN212236714U (en) | 2020-09-23 | 2020-09-23 | Dosing device based on operation condition of desulfurization tower of coal-fired unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022104978.6U CN212236714U (en) | 2020-09-23 | 2020-09-23 | Dosing device based on operation condition of desulfurization tower of coal-fired unit |
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| CN212236714U true CN212236714U (en) | 2020-12-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112076616A (en) * | 2020-09-23 | 2020-12-15 | 浙江浙能技术研究院有限公司 | Dosing device and method based on operation condition of desulfurization tower of coal-fired unit |
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- 2020-09-23 CN CN202022104978.6U patent/CN212236714U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112076616A (en) * | 2020-09-23 | 2020-12-15 | 浙江浙能技术研究院有限公司 | Dosing device and method based on operation condition of desulfurization tower of coal-fired unit |
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