CN206730660U - A kind of raffinate buffer tank's liquid level control system for PTA devices - Google Patents
A kind of raffinate buffer tank's liquid level control system for PTA devices Download PDFInfo
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- CN206730660U CN206730660U CN201720377968.5U CN201720377968U CN206730660U CN 206730660 U CN206730660 U CN 206730660U CN 201720377968 U CN201720377968 U CN 201720377968U CN 206730660 U CN206730660 U CN 206730660U
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- raffinate
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- pump
- mother liquor
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Abstract
It the utility model is related to PTA process units technical fields, more particularly to a kind of raffinate buffer tank's liquid level control system for PTA devices, some mother liquor filters are connected to raffinate surge tank by inlet duct respectively, raffinate surge tank is connected to raffinate delivery pump by storage-tank effluent line, raffinate delivery pump is connected to mother liquor filter by pump discharge pipeline, reducing short tube is set on the pump discharge pipeline, the pump discharge pipeline is connected to raffinate surge tank by the clean-up line that flows back, contact of the clean-up line on pump discharge pipeline flow back between reducing short tube and raffinate delivery pump, water supply line is connected to raffinate surge tank, fluid level control valve is set in water supply line.The utility model increases backflow clean-up line in raffinate surge tank, and angle has opposite tank bottom outlet line, ensures the solid deposition that pipeline opening will not be excessive, causes pump intake to block；The rate of discharge of pump is constant, P TOL is not produced the possibility of knot wall.
Description
Technical field
It the utility model is related to PTA process units technical fields, and in particular to a kind of raffinate surge tank for PTA devices
Tank level control system.
Background technology
PTA（P-phthalic acid）Device when being rinsed after the filtering of device mother liquor filter is raffinate surge tank, mother liquor mistake
TA in filter main filtration mother liquor（Terephthalic acid (TPA)）Solid particle and P-TOL（P-methylbenzoic acid）, the mistake of this filter
Filter pattern is intermittent filtration, that is, has filtration stage and rinse stage, and thus needing will by the filtrate in filter and part filter cake
It is retracted into this surge tank.Filter totally 4 alternate runs, need to squeeze into the liquid in raffinate surge tank the filter filtered
In, so repeatedly.Intrinsic control mode is to be provided with fluid level control valve on the outlet line of raffinate surge tank outlet pump,
This is also normal tank level control mode, i.e., the liquid level set according to controller, big valve is opened higher than setting value, less than setting
Definite value just turns down valve.
Due to containing certain solid content in raffinate surge tank in actual production, and solid main component is P-TOL, pole
Easily knot wall blocks pipeline.When discharge control valve turns down, in addition it is fully closed when result in P-TOL flow velocity be slack-off in the duct, in pipeline
Middle deposition, pipeline is blocked, ultimately result in the knot wall of P-TOL in whole piece pipeline, deal with extremely difficult, also had to production very big
Influence.
The content of the invention
In view of the above-mentioned problems, technical scheme provided by the utility model is a kind of raffinate surge tank liquid for PTA devices
Level controlling system, the stability and continuous service ability of its system greatly enhanced.
To reach above-mentioned purpose, the technical solution of the utility model is a kind of raffinate surge tank liquid level for PTA devices
Control system, it include some mother liquor filters, raffinate surge tank, storage-tank effluent line, raffinate delivery pump, pump discharge pipeline,
Flow back clean-up line and water supply line；Some mother liquor filters are connected to raffinate surge tank by inlet duct respectively, residual
Liquid surge tank is connected to raffinate delivery pump by storage-tank effluent line, and raffinate delivery pump is connected to mother liquor mistake by pump discharge pipeline
Filter, reducing short tube is set on the pump discharge pipeline, and the pump discharge pipeline is connected to raffinate by the clean-up line that flows back and delayed
Tank is rushed, contact of the backflow clean-up line on pump discharge pipeline is between reducing short tube and raffinate delivery pump, water supply line connection
To raffinate surge tank, fluid level control valve is set in water supply line.
The backflow clean-up line stretches into raffinate surge tank, and angle is towards storage-tank effluent line position.
Some mother liquor filters include mother liquor filter A, liquid filter B, mother liquor filter C and mother liquor filter D.
One live discharge pipe line is respectively set on the storage-tank effluent line and outlet line.
The raffinate surge tank top sets blow-down pipe.
Live hand valve is respectively provided with the storage-tank effluent line and pump discharge pipeline of the raffinate delivery pump connection.
The line size of the reducing short tube need to not only ensure pipe flow speed but also ensure that pump overload operation will not be made.
Reducing short tube both ends are connected with the pump discharge pipeline using flange.
The utility model is analyzed for system, mainly due to turning down for control valve, causes the fluid in whole piece pipeline
Flow-reduction, flow velocity are slack-off.And main blocking position pipeline and pumping intake piping before control valve are seen according to the process experience at scene
Line.
The utility model has mainly done 2 points of transformations：
(1) change the traditional Liquid level mode of raffinate surge tank, the moisturizing line of raffinate surge tank is set up, by original liquid level
Control valve is attached on moisturizing line, and reducing short tube is installed additional in original control valve position in the performance parameter according to pump.Make the outlet of pump
Flow is constant, ensures the rate of flow of fluid in pipeline, P-TOL is not produced the possibility of knot wall.Water used in moisturizing line is direct
For the cleaner liquid of filter, it is not necessary to increase extra consumption.
(2) backflow clean-up line is set up, is ensured herein in raffinate surge tank outlet, the i.e. entry position of raffinate delivery pump
Position does not have excessive deposition, ensures that entrance is unobstructed.
The beneficial effects of the utility model：Increase backflow clean-up line, angle have opposite tank bottom to go out in raffinate surge tank
Mouth pipeline, ensure the solid deposition that pipeline opening will not be excessive, cause pump intake to block；The rate of discharge of pump is constant, ensures pipeline
In rate of flow of fluid, make P-TOL will not produce knot wall possibility.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
In figure：1st, blow-down pipe, 2, mother liquor filter move back liquidus, 3, fluid level control valve, 4, live hand valve, 5, filling pipe
Line, 6, storage-tank effluent line, 7, live discharge pipe line, 8, raffinate delivery pump, 9, reducing short tube, 10, backflow clean-up line, 11,
Raffinate surge tank, 12, mother liquor filter A, 13, mother liquor filter B, 14, mother liquor filter C, 15, mother liquor filter D, 16, pump
Outlet line, 17, inlet duct.
Embodiment
A kind of raffinate buffer tank's liquid level control system for PTA devices, it includes some mother liquor filters, raffinate buffering
Tank 11, storage-tank effluent line 6, raffinate delivery pump 8, pump discharge pipeline 16, backflow clean-up line 10 and water supply line 5；It is if described
Fundatrix liquid filter is connected to raffinate surge tank 11 by inlet duct 17 respectively, and raffinate surge tank 11 passes through storage-tank effluent line
6 are connected to raffinate delivery pump 8, and raffinate delivery pump 8 is connected to mother liquor filter by pump discharge pipeline 16, and mother liquor filter includes
Above-mentioned some mother liquor filters, i.e. mother liquor filter A, mother liquor filter B, mother liquor filter C, mother liquor filter D, the pump
Reducing short tube 9 is set on outlet line 16, and the pump discharge pipeline 16 is connected to raffinate surge tank by the clean-up line 10 that flows back
11, contact of the backflow clean-up line 10 on pump discharge pipeline 16 is between reducing short tube 9 and raffinate delivery pump 8, water supply line 5
Raffinate surge tank 11 is connected to, fluid level control valve 3 is set in water supply line 5.
The backflow clean-up line 10 stretches into raffinate surge tank 11, and angle is towards storage-tank effluent line position.
Some mother liquor filters include mother liquor filter A, liquid filter B, mother liquor filter C and mother liquor filter D.
One live discharge pipe line 7 is respectively set on the storage-tank effluent line 6 and outlet line 16.
The top of raffinate surge tank 11 sets blow-down pipe 1.
Live hand valve 4 is respectively provided with the storage-tank effluent line 6 and pump discharge pipeline 16 that the raffinate delivery pump 8 connects.
The line size of the reducing short tube 9 need to not only ensure pipe flow speed but also ensure that pump overload operation will not be made.
The both ends of reducing short tube 9 are connected with the pump discharge pipeline 16 using flange.
Reforming mode of the present utility model：After the parking of mother liquor filtration system, by original control valve 3 in the original location（Now
Reducing short tube 9）Place is removed, and in water supply line 5, used moisturizing medium is the cleaner liquid of mother liquor filter, so
Extra consumption can not be increased.Further according to the performance parameter of raffinate delivery pump 8, design and installation reducing short tube 9, reducing short tube 9
Line size need to ensure that pipe flow speed ensures that pump overload operation will not be made again.Reducing short tube 9 is connected using two end flanges, this
Sample is not inconsistent such as once in the actual motion of production with calculating, is also convenient for changing.The increase backflow flush pipe in raffinate surge tank
Line, angle have opposite tank bottom outlet line, ensure the solid deposition that pipeline opening will not be excessive, cause pump intake to block.Newly-increased pipe
Line directly welds because pressure-bearing is little in the tank domestic demand alignment mouth of pipe.
Because the flow of cleaner liquid is very sufficient, the Liquid level to raffinate surge tank is so ensured that, and it is whole
The import and export pipeline of individual raffinate delivery pump is not in P-TOL stopping state because flow is constant, flow velocity is very fast, so big
The stability of the system strengthened greatly and continuous service ability.
Claims (8)
- A kind of 1. raffinate buffer tank's liquid level control system for PTA devices, it is characterised in that：Including some mother liquor filters, Raffinate surge tank, storage-tank effluent line, raffinate delivery pump, pump discharge pipeline, backflow clean-up line and water supply line；It is described some Mother liquor filter is connected to raffinate surge tank by inlet duct respectively, and raffinate surge tank is connected to residual by storage-tank effluent line Liquid delivery pump, raffinate delivery pump are connected to mother liquor filter by pump discharge pipeline, set reducing short on the pump discharge pipeline Pipe, the pump discharge pipeline are connected to raffinate surge tank by the clean-up line that flows back, and backflow clean-up line is on pump discharge pipeline Contact between reducing short tube and raffinate delivery pump, water supply line is connected to raffinate surge tank, and liquid level is set in water supply line Control valve.
- A kind of 2. raffinate buffer tank's liquid level control system for PTA devices according to claim 1, it is characterised in that： The backflow clean-up line stretches into raffinate surge tank, and angle is towards storage-tank effluent line position.
- A kind of 3. raffinate buffer tank's liquid level control system for PTA devices according to claim 1, it is characterised in that： Some mother liquor filters include mother liquor filter A, liquid filter B, mother liquor filter C and mother liquor filter D.
- A kind of 4. raffinate buffer tank's liquid level control system for PTA devices according to claim 1, it is characterised in that： One live discharge pipe line is respectively set on the storage-tank effluent line and outlet line.
- A kind of 5. raffinate buffer tank's liquid level control system for PTA devices according to claim 1, it is characterised in that： The raffinate surge tank top sets blow-down pipe.
- A kind of 6. raffinate buffer tank's liquid level control system for PTA devices according to claim 1, it is characterised in that： Live hand valve is respectively provided with the storage-tank effluent line and pump discharge pipeline of the raffinate delivery pump connection.
- A kind of 7. raffinate buffer tank's liquid level control system for PTA devices according to claim 1, it is characterised in that： The line size of the reducing short tube need to not only ensure pipe flow speed but also ensure that raffinate delivery pump overload operation will not be made.
- A kind of 8. raffinate buffer tank's liquid level control system for PTA devices according to claim 1, it is characterised in that： Reducing short tube both ends are connected with the pump discharge pipeline using flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720377968.5U CN206730660U (en) | 2017-04-12 | 2017-04-12 | A kind of raffinate buffer tank's liquid level control system for PTA devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720377968.5U CN206730660U (en) | 2017-04-12 | 2017-04-12 | A kind of raffinate buffer tank's liquid level control system for PTA devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206730660U true CN206730660U (en) | 2017-12-12 |
Family
ID=60560094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720377968.5U Active CN206730660U (en) | 2017-04-12 | 2017-04-12 | A kind of raffinate buffer tank's liquid level control system for PTA devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206730660U (en) |
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2017
- 2017-04-12 CN CN201720377968.5U patent/CN206730660U/en active Active
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