CN205146176U - A liquid automatic material conveying device for denitration catalyst production line - Google Patents

A liquid automatic material conveying device for denitration catalyst production line Download PDF

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Publication number
CN205146176U
CN205146176U CN201520907528.7U CN201520907528U CN205146176U CN 205146176 U CN205146176 U CN 205146176U CN 201520907528 U CN201520907528 U CN 201520907528U CN 205146176 U CN205146176 U CN 205146176U
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measuring tank
liquid level
liquid
metering
differential pressure
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CN201520907528.7U
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Chinese (zh)
Inventor
郑光静
钱龙
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Zhejiang Guanghan Technology Group Co.,Ltd.
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Zhejiang Guanghan Environmental Protection Technology Co Ltd
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Abstract

The utility model provides a liquid automatic material conveying device for denitration catalyst production line, join in marriage liquid metering tank, ammonia water metering jar, desalination water metering jar and lactic acid metering tank including at least one, at least one is equipped with differential pressure formula liquid level changer respectively on joining in marriage liquid metering tank, ammonia water metering jar, desalination water metering jar and lactic acid metering tank, and at least one exit of joining in marriage liquid metering tank, ammonia water metering jar, desalination water metering jar and lactic acid metering tank is equipped with the air pressure switch valve respectively, and the export of metering tank is connected to the machine that mixes separately. Through setting up differential pressure formula liquid level changer on each metering tank, differential pressure formula liquid level changer is when the liquid level changes in according to the container, and the static pressure that is produced by the liquid column is the indirect liquid level height of accurately measuring of principle of corresponding change also, then according to the setting value, by the DSC controller according to the opening and close and the size of the pneumatic ooff valve of reinforced value control of actual liquid level height and settlement, realize accurate feeding in raw material.

Description

For the liquid automatic feeding device of denitration catalyst production line
Technical field
The utility model relates to Catalyst Production field, particularly relates to the measuring tank liquid automatic feeding device in Catalyst Production.
Background technology
During denitration SCR catalyst is produced, first production process-compounding procedure, to feed in raw material link at automatic liquid metering, and measuring tank metering is accurate not, causes actual reinforced larger with theoretical feeding quantity deviation.The direct result that it causes is exactly: carry out mixing according to calendering process list, when each step carries out detection moisture, always there is deviation with theoretical value, then needs to readjust according to testing result reinforced.So, mixing time rises appreciably, and Staff activity significantly declines, and electricity, gas, the consumption of water equal energy source also and then improve.Even more serious consequence is exactly, and the content of vanadium that final finished detects and project demand value can exist larger difference, directly affects the serviceability of catalyst, is also virtually adding production cost simultaneously.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of liquid automatic feeding device for denitration catalyst production line, can ensure the high accuracy measuring level value, guarantee the accuracy of liquid auto feed.
The technical scheme that the utility model technical solution problem adopts is:
For the liquid automatic feeding device of denitration catalyst production line, comprise at least one dosing measuring tank, ammoniacal liquor measuring tank, demineralized water measuring tank and lactic acid measuring tank, at least one dosing measuring tank described, ammoniacal liquor measuring tank, demineralized water measuring tank and lactic acid measuring tank are respectively equipped with liquid level transducer of differential pressure type, at least one dosing measuring tank described, ammoniacal liquor measuring tank, the exit of demineralized water measuring tank and lactic acid measuring tank is respectively equipped with pneumatic on-off valve, at least one dosing measuring tank described, ammoniacal liquor measuring tank, the outlet of demineralized water measuring tank and lactic acid measuring tank is connected to muller separately.
While employing technique scheme, the utility model can also adopt or combine and adopt following further technical scheme:
The two ends of described liquid level transducer of differential pressure type are respectively by the up and down two ends of Flange joint in each measuring tank side.
The outlet of each measuring tank is provided with many and is in charge of, and every root is in charge of and is equipped with pneumatic on-off valve.
Described liquid level transducer of differential pressure type and described pneumatic on-off valve are all connected to DCS controller.
The outlet of each measuring tank is all arranged on the bottom of measuring tank.
The top of each measuring tank described is provided with breather valve.
The beneficial effects of the utility model are: by arranging liquid level transducer of differential pressure type on each measuring tank, liquid level transducer of differential pressure type is according to when in container, liquid level changes, the principle of the static pressure produced by fluid column also respective change measures liquid level indirectly exactly, then according to setting value, be worth according to actual liquid level height and the reinforced of setting the keying and size that control pneumatic on-off valve by DSC controller, realize accurately feeding in raw material.In addition, liquid level transducer of differential pressure type is directly installed on measuring tank, first accurately measures actual liquid level; Then according to the reinforced value of DCS setting, measuring tank outlet conduit arranges pneumatic on-off valve, according to the mode of repeatedly blowing experiment of weighing, finds out the deviate that measuring tank liquid level decreasing value and DCS set value of feeding in raw material, with the corresponding relation of pneumatic on-off valve actuation time; The last advancement time setting pneumatic on-off valve according to this corresponding relation.So just can the error of the actual output liquid level of measuring tank and setting value be dropped to minimum.
Accompanying drawing explanation
Fig. 1 is overall structure figure of the present utility model.
Fig. 2 is the measuring principle figure of liquid level transducer of differential pressure type of the present utility model.
Detailed description of the invention
With reference to accompanying drawing.
The utility model comprises two dosing measuring tanks, ammoniacal liquor measuring tank 2, demineralized water measuring tank 3 and lactic acid measuring tank 5, two dosing measuring tanks are AMV measuring tank 1 and AMT measuring tank 4 respectively, AMV measuring tank 1, ammoniacal liquor measuring tank 2, demineralized water measuring tank 3, AMT measuring tank 4 and lactic acid measuring tank 5 are respectively equipped with liquid level transducer of differential pressure type 6, liquid level transducer of differential pressure type 6 adopts two flange form, DN80, PN16, RF face, 4 ~ 20mA+HART, electric interfaces: M20X1.5, material: 304, AMV measuring tank 1, ammoniacal liquor measuring tank 2, demineralized water measuring tank 3, the outlet of AMT measuring tank 4 and lactic acid measuring tank 5 is located at the bottom of tank body, exit is provided with many and is in charge of 7, every root is in charge of on 7 and is equipped with pneumatic on-off valve 8, pneumatic on-off valve 8 and liquid level transducer of differential pressure type 6 are all connected to DSC controller, measurement result is sent to DSC controller by liquid level transducer of differential pressure type 6, DSC controller controls the action of pneumatic on-off valve 8, in order to ensure the air pressure balance in measuring tank, the top of each measuring tank is also provided with breather valve 9.
The two ends of liquid level transducer of differential pressure type 6 are connected to two flange ports (flange port size >=DN50) up and down of measuring tank side, fluid level transmitter 6 inside is divided into the chamber of malleation and negative pressure, the chamber of malleation with+represent, the chamber of negative pressure with-represent, as shown in Figure 2, fluid level transmitter 6 can according to when in container, liquid level changes, the static pressure produced by fluid column also respective change principle and indirectly measure liquid level exactly.
Plemum: P +=ρ gH+P gas
Negative pressure chamber: P -=P gas
Differential pressure: △ P=P +-P -=ρ gH
In above formula, P +for plemum pressure, P -for negative pressure chamber's pressure, P gasfor ullage gaseous pressure, ρ is fluid density, and H is liquid level, and g is acceleration of gravity.
When the density of measured medium is known, then the differential pressure that differential pressure water level transducer records is directly proportional to liquid level, is so just converted to measuring liquid level the problem measuring differential pressure.Going out liquid level by differential pressure value indirect inspection, is the most desirable current simple level gauging instrument.
In Catalyst Production before, measuring tank liquid auto feed this part, major part all adopts measuring tank outlet conduit installation fluid flowmeter to add the mode of pump, realizes automatic dosage.The shortcoming of this kind of mode: one is by pipeline vibration interference, fluid flowmeter measured value and actual value error larger; But variant during the meeting of the switching delay time of pump, if carry out rearrange liquids auto feed according to setting value, comparatively big error can be there is.
Liquid level transducer of differential pressure type is directly installed on measuring tank, first accurately measures actual liquid level; Then according to the reinforced value of DCS setting, measuring tank outlet conduit arranges pneumatic on-off valve, according to the mode of repeatedly blowing experiment of weighing, finds out the deviate that measuring tank liquid level decreasing value and DCS set value of feeding in raw material, with the corresponding relation of pneumatic on-off valve actuation time; The last advancement time setting pneumatic on-off valve according to this corresponding relation.So just can the error of the actual output liquid level of measuring tank and setting value be dropped to minimum.
Concrete operations mode of the present utility model is: according to raw material parameter declaration, and DCS inputs the density value of AMV, ammoniacal liquor, demineralized water, AMT, lactic acid.Then according to the requirement of calendering process list, DCS picture sets the reinforced bulking value often criticizing pug of AMV, ammoniacal liquor, demineralized water, AMT, lactic acid.Next measuring tank is exported pneumatic on-off valve all to drop into automatically.According to the operating procedure on calendering process list, add the solution in measuring tank successively.

Claims (6)

1. for the liquid automatic feeding device of denitration catalyst production line, it is characterized in that: described liquid automatic feeding device comprises at least one dosing measuring tank, ammoniacal liquor measuring tank, demineralized water measuring tank and lactic acid measuring tank, at least one dosing measuring tank described, ammoniacal liquor measuring tank, demineralized water measuring tank and lactic acid measuring tank are respectively equipped with liquid level transducer of differential pressure type, at least one dosing measuring tank described, ammoniacal liquor measuring tank, the exit of demineralized water measuring tank and lactic acid measuring tank is respectively equipped with pneumatic on-off valve, at least one dosing measuring tank described, ammoniacal liquor measuring tank, the outlet of demineralized water measuring tank and lactic acid measuring tank is connected to muller separately.
2., as claimed in claim 1 for the liquid automatic feeding device of denitration catalyst production line, it is characterized in that: the two ends of described liquid level transducer of differential pressure type are respectively by the up and down two ends of Flange joint in each measuring tank side.
3. as claimed in claim 1 for the liquid automatic feeding device of denitration catalyst production line, it is characterized in that: the outlet of each measuring tank is provided with many and is in charge of, every root is in charge of and is equipped with pneumatic on-off valve.
4., as claimed in claim 1 for the liquid automatic feeding device of denitration catalyst production line, it is characterized in that: described liquid level transducer of differential pressure type and described pneumatic on-off valve are all connected to DCS controller.
5., as claimed in claim 1 for the liquid automatic feeding device of denitration catalyst production line, it is characterized in that: the outlet of each measuring tank is all arranged on the bottom of measuring tank.
6., as claimed in claim 1 for the liquid automatic feeding device of denitration catalyst production line, it is characterized in that: the top of each measuring tank described is provided with breather valve.
CN201520907528.7U 2015-11-13 2015-11-13 A liquid automatic material conveying device for denitration catalyst production line Active CN205146176U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520907528.7U CN205146176U (en) 2015-11-13 2015-11-13 A liquid automatic material conveying device for denitration catalyst production line

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Application Number Priority Date Filing Date Title
CN201520907528.7U CN205146176U (en) 2015-11-13 2015-11-13 A liquid automatic material conveying device for denitration catalyst production line

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106732191A (en) * 2016-11-18 2017-05-31 北京东方雨虹防水工程有限公司 A kind of water paint automatic blanking system and the method to reactor automatic blanking
CN112823873A (en) * 2019-11-21 2021-05-21 杉杉能源(宁夏)有限公司 Method and device for accurately controlling feeding of reaction kettle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106732191A (en) * 2016-11-18 2017-05-31 北京东方雨虹防水工程有限公司 A kind of water paint automatic blanking system and the method to reactor automatic blanking
CN112823873A (en) * 2019-11-21 2021-05-21 杉杉能源(宁夏)有限公司 Method and device for accurately controlling feeding of reaction kettle
CN112823873B (en) * 2019-11-21 2022-08-30 巴斯夫杉杉电池材料(宁夏)有限公司 Method and device for accurately controlling feeding of reaction kettle

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CP01 Change in the name or title of a patent holder
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Address after: 1111 Qingxi 2nd Road, Jiangdong Industrial Park, Xiaoshan District, Hangzhou, Zhejiang 311200

Patentee after: Zhejiang Guanghan Technology Group Co.,Ltd.

Address before: 1111 Qingxi 2nd Road, Jiangdong Industrial Park, Xiaoshan District, Hangzhou, Zhejiang 311200

Patentee before: ZHEJIANG GUANGHAN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd.