CN104474988B - A kind of automatic control method neutralizing reaction unit - Google Patents
A kind of automatic control method neutralizing reaction unit Download PDFInfo
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- CN104474988B CN104474988B CN201410775190.4A CN201410775190A CN104474988B CN 104474988 B CN104474988 B CN 104474988B CN 201410775190 A CN201410775190 A CN 201410775190A CN 104474988 B CN104474988 B CN 104474988B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/02—Feed or outlet devices; Feed or outlet control devices for feeding measured, i.e. prescribed quantities of reagents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00054—Controlling or regulating the heat exchange system
- B01J2219/00056—Controlling or regulating the heat exchange system involving measured parameters
- B01J2219/00069—Flow rate measurement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00761—Details of the reactor
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Abstract
The invention discloses a kind of device neutralizing reaction, it is characterized in that: include liquid caustic soda measuring tank, liquid caustic soda bucket, acid solution bucket, neutralize still and PLC, the top of described neutralization still offers two charging apertures, one of them charging aperture is sequentially connected with liquid caustic soda measuring tank and liquid caustic soda bucket, another charging aperture connects acid solution bucket, neutralize reaction unit and also include the first regulation valve and the accurate control unit for control accurate to material, first regulation valve is arranged on any one charging aperture, described neutralization still is built-in with temperature sensor, and the temperature signal neutralized in still is delivered to PLC, to be controlled the switch traffic size of the first regulation valve by PLC.Effectively neutralized in course of reaction by this kind of apparatus and method, accurate control that can be real-time to acid solution and alkali liquor, it is ensured that neutralize the effect of reaction.
Description
Technical field
The present invention relates to neutralize reaction field, a kind of device neutralizing reaction and automatic control method.
Background technology
Neutralizing reaction (neutralization reaction) is that acid intercourses composition with alkali, generates salt and the reaction of water.
The Chinese invention of Application No. 201310735031.7 discloses in a kind of ammonium nitrate and control system, including neutralizing
Device, described neutralizer is connected to nitric acid feed pipe and ammonia feed pipe, the outlet side, top of described neutralizer and gas-liquid separation
The input of device connects, its outfan is connected with neutralizer again；The liquid outlet of described gas-liquid separator is connected with described neutralizer；
The outlet side, top of described neutralizer connects has condenser, the outfan of described condenser to be provided with the first sampling valve；Described neutralizer
And the connection pipeline between neutralizer is provided with the second sampling valve again；Described first sampling valve and the equal position of the port of export of the second sampling valve
Top in funnel.The steam that escaped neutralizer introduces and carries out condensation in condenser and become condensed fluid and be sampled analyzing its acid
Basicity, according to analysis result regulation acid or the flow valve of ammonia, and then the acid-base value of control ammonium nitrate solution, reduction acid, ammonia disappear
Consumption, and reclaim solution, energy-conserving and environment-protective.
The Chinese utility model of Application No. 201320230351.2 discloses a kind of acid-base neutralization life vulcanizing aldehyde-ketone condensate
Produce device, be located at higher than neutralizing tank height including reactor, neutralizing tank, acid tank and manual modulation valve, reactor and acid tank
On shelf, neutralizing tank is located on level ground, is provided with a discharge nozzle, discharge nozzle and neutralizing tank upper inlet bottom reactor
Connect, be provided with one go out acid tube at acid pot bottom, go out acid tube and discharge nozzle and connect, discharge nozzle with go out on acid tube, to be each provided with one
Individual hand flow regulating valve.
But above two patent is owing to not to acid solution or the accurate control of alkali liquor, in actual production, all can deposit
There iing problems with: first so that during reacting, it may appear that the consumption of acid solution is more than alkali liquor, or alkali liquor
Consume more than the phenomenon of acid solution, add acid solution or the too much consumption of alkali liquor, be unfavorable for environmental protection；Second, unnecessary after neutralization
Acid solution or alkali liquor influence whether the chemical property (such as pH value) of product, thus can not reach it is contemplated that product should
The performance reached, thus have impact on the production of subsequent technique；3rd, in whole neutralization course of reaction, it is impossible to neutralizing reaction
Carry out real-time accurate control, thus can not well ensure the effect of acid-base neutralization.
Therefore, one is arranged in neutralizing course of reaction, it is possible to the effective device carrying out the most accurately controlling to material,
Seem necessity very and importance.
Summary of the invention
The deficiency existed for prior art, it is an object of the invention to provide a kind of device neutralizing reaction and from prosecutor
Method, is effectively being neutralized in course of reaction by this kind of apparatus and method, accurate control that can be real-time to acid solution and alkali liquor
System, it is ensured that neutralize the effect of reaction.
For achieving the above object, the technical scheme is that a kind of neutralization reaction unit, measure including liquid caustic soda
Tank, liquid caustic soda bucket, acid solution bucket, neutralization still and PLC, the top of described neutralization still offers two charging apertures,
One of them charging aperture is sequentially connected with liquid caustic soda measuring tank and liquid caustic soda bucket, and another charging aperture connects acid solution bucket, described neutralization reaction dress
Putting and also include the first regulation valve and the accurate control unit for control accurate to material, the first regulation valve is arranged on any one
On individual charging aperture, described neutralization still is built-in with temperature sensor, and the temperature signal neutralized in still is delivered to PLC control
Device, to control the switch traffic size of the first regulation valve by PLC.
The present invention is further arranged to: described accurate control unit is to be carried out material accurately by Weighing module control system
Control.
The present invention is further arranged to: described first regulation valve is arranged between neutralization still and acid solution bucket, measures from liquid caustic soda
Tank extremely neutralizes to be connected with successively on still and is equipped with control valve and dosing pump, is additionally provided with for regulating between described liquid caustic soda measuring tank and liquid caustic soda bucket
Second regulation valve of liquid caustic soda uninterrupted, described accurate control unit includes and is arranged on liquid caustic soda measuring tank and neutralizes the title on still
Weight acquisition module, described in weigh acquisition module by liquid caustic soda measuring tank and neutralize still weight signal be delivered to PLC,
To control the second regulation valve and switch traffic size of dosing pump.
The present invention is further arranged to: be mounted on Pressure gauge on described liquid caustic soda measuring tank and neutralization still.
The present invention is further arranged to: described first regulation valve is operated pneumatic valve or electrically operated valve, and described second regulation valve is
Operated pneumatic valve or electrically operated valve, described control valve is pneumatic ball valve.
The present invention is further arranged to: described accurate control unit is accurately to be controlled material by dosing pump control system
System.
The present invention is further arranged to: described first regulation valve is arranged between neutralization still and liquid caustic soda measuring tank, and liquid caustic soda measures
All it is connected by accurate control unit between tank and liquid caustic soda bucket and between acid solution bucket and neutralization still, described accurate control unit
Include and be sequentially connected the control valve of setting, dosing pump and mass flowmenter, and described control valve is near liquid caustic soda bucket or acid solution
Bucket is arranged.
The present invention is further arranged to: be provided with high point liquid level and low spot liquid level in described liquid caustic soda measuring tank and neutralization still,
And realize liquid level by its internal pressure transducer arranged and show and data output.
The present invention is further arranged to: a kind of automatic control method neutralizing reaction unit, includes following steps.
A: by being arranged on liquid caustic soda measuring tank and the pressure transducer neutralized in still, realize the display sum to its liquid level
According to output, and the data exported are delivered to PLC.
B: neutralizing the reaction starting stage, the Data Control PLC of pressure transducer output is thrown to complete negative pressure
Material, described negative-pressure feeding is for opening, close corresponding vacuum, and the control valve of blowdown piping and first regulates valve, the second regulation
The switching of valve, to realize having automatically controlled feeding intake.
C: neutralizing the reaction incipient stage, the material in liquid caustic soda bucket regulates valve feed in liquid caustic soda measuring tank by second,
Material in acid solution bucket by first regulation valve to neutralize still feed, when liquid caustic soda measuring tank or neutralize still weight reach to weigh
During the intermediate weight that acquisition module sets, two regulation valves start to be automatically adjusted the aperture of valve with the increase of weight, until weight
Amount completely closes two regulation valves, to complete the accurate measurement to material after reaching the value finally set.
The present invention is further arranged to: a kind of automatic control method neutralizing reaction unit, includes following steps.
A: by being arranged on liquid caustic soda measuring tank and the pressure transducer neutralized in still, realize the display sum to its liquid level
According to output, and the data exported are delivered to PLC.
B: neutralizing the reaction starting stage, the Data Control PLC of pressure transducer output is thrown to complete material
Material, described material is to open, close product pump, control valve and the first regulation valve switching of opening, closing, to realize
Automatically control throwing.
C: neutralizing the reaction incipient stage, the material in liquid caustic soda bucket and acid solution bucket is scored by dosing pump, mass flow
Not flowing to liquid caustic soda measuring tank and neutralize still, mass flowmenter accumulation calculates the weight that material flows through, when material will reach quality stream
During the weight that gauge sets, dosing pump starts the aperture being automatically adjusted valve with the increase of weight to reduce charging rate, until
Weight completely closes dosing pump after reaching the value finally set, to complete the accurate measurement to material.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the present invention the first specific embodiment；
Fig. 2 is the schematic diagram of the present invention the second specific embodiment.
In figure: 1, liquid caustic soda measuring tank；2, liquid caustic soda bucket；3, acid solution bucket；4, still is neutralized；5, PLC；
6, the first regulation valve；7, the second regulation valve；8, temperature sensor；9, weigh acquisition module；10, control valve；11、
Dosing pump；12, Pressure gauge；13, dosing pump control system；14, mass flowmenter.
Detailed description of the invention
Referring to figs. 1 through Fig. 2, the present invention will be further described.
Current acid-base neutralization reaction, due to the accurate control not fed acid solution or alkali liquor amount, in actual production
In, all can there are problems with: first so that during reacting, it may appear that the consumption of acid solution is more than alkali liquor,
Or alkali liquor consume more than the phenomenon of acid solution, add acid solution or the too much consumption of alkali liquor, be unfavorable for environmental protection；Second, in
With the chemical property (such as pH value) that rear unnecessary acid solution or alkali liquor influence whether product, thus it is pre-not reach people
Meter this performance reached of product, thus have impact on the production of subsequent technique；3rd, in whole neutralization course of reaction, it is impossible to
Carrying out real-time accurate control to neutralizing reaction, thus can not well ensure the effect of acid-base neutralization, therefore the present invention is led to
Cross employing specific examples below and preferably resolve this problem.
With reference to shown in Fig. 1, in the first specific embodiment, a kind of neutralization reaction unit, including liquid caustic soda measuring tank 1, liquid caustic soda
(described PLC 5 is selected: Siemens for bucket 2, acid solution bucket 3, neutralization still 4 and PLC 5
S7200CPU222), the top of described neutralization still 4 offers two charging apertures, and one of them charging aperture is sequentially connected with liquid caustic soda meter
Measuring tank 1 and liquid caustic soda bucket 2, another charging aperture connects acid solution bucket 3, it is characterized in that: described neutralization reaction unit also includes the
One regulation valve 6 and the accurate control unit for control accurate to material, the first regulation valve 6 is arranged on any one charging aperture
On, described neutralization still 4 is built-in with temperature sensor 8, and the temperature signal neutralized in still 4 is delivered to PLC 5,
And the switch traffic size of the first regulation valve 6 is controlled according to PLC 5.
With reference to shown in Fig. 1, described accurate control unit is accurately to be controlled material by Weighing module control system, institute
State the first regulation valve 6 to be arranged between neutralization still 4 and acid solution bucket 3, be connected with successively to neutralization still 4 from liquid caustic soda measuring tank 1
It is equipped with control valve 10 and dosing pump 11, is additionally provided with for regulating liquid caustic soda flow big between described liquid caustic soda measuring tank 1 and liquid caustic soda bucket 2
The second little regulation valve 7, described accurate control unit includes to be arranged on liquid caustic soda measuring tank 1 and neutralize weighing on still 4 and adopts
Collection module 9, described in weigh acquisition module 9 by liquid caustic soda measuring tank 1 and neutralize still 4 weight signal be delivered to PLC
5, and the switch traffic size of the second regulation valve 7 is controlled according to PLC 5.
With reference to shown in Fig. 1, described liquid caustic soda measuring tank 1 and neutralization still 4 are mounted on Pressure gauge 12, can be real-time
Detect liquid caustic soda measuring tank 1 and neutralize the pressure values in still 4.
With reference to shown in Fig. 1, described first regulation valve 6 is operated pneumatic valve or electrically operated valve, and described second regulation valve 7 is gas
Movable valve or electrically operated valve, described control valve 10 is pneumatic ball valve.
With reference to shown in Fig. 1, in described liquid caustic soda measuring tank 1 and neutralization still 4, it is provided with high point liquid level and low spot liquid level, and
Realize liquid level by its internal pressure transducer arranged to show and data output.
With reference to shown in Fig. 1, the work of the first specific embodiment has following steps.
A: by being arranged on liquid caustic soda measuring tank 1 and the pressure transducer neutralized in still 4, realize the display to its liquid level
With the output of data, and the data exported are delivered in PLC 5.
B: neutralizing the reaction starting stage, the Data Control PLC 5 of pressure transducer output is thrown to complete negative pressure
Material, described negative-pressure feeding for opening, close corresponding vacuum, the control valve of blowdown piping 10 and first regulate valve 6, the
The switching of two regulation valves 7, to realize having automatically controlled feeding intake.
C: neutralizing the reaction incipient stage, the material in liquid caustic soda bucket 2 regulates valve 7 in liquid caustic soda measuring tank 1 by second
Feed, the material in acid solution bucket 3 by first regulation valve 6 to neutralize still 4 feed, when liquid caustic soda measuring tank 1 or neutralize still
The weight of 4 reach to weigh intermediate weight that acquisition module 9 sets time, two regulation valves start to be automatically adjusted with the increase of weight
The aperture of valve, until weight reach the value finally set after completely close two regulation valves, by complete to material accurately in terms of
Amount.
With reference to shown in Fig. 1, the operation principle of the first specific embodiment is: in the starting stage neutralizing reaction, due to liquid caustic soda
Bucket 2 and the liquid level neutralized in still 4 are below low spot liquid level, thus are played it by the pressure transducer of setting in it respectively
The real-time monitoring of liquid level, to realize the display to its liquid level and the output of data, and the data exported are delivered to PLC control
Device 5, this process is: pressure transducer moment monitoring liquid caustic soda measuring tank 1 and the actual pressure value neutralized in still 4, and passes through
A/D module is converted to digital transfer to PLC 5, PLC 5 by the value comparing actual value with set,
After obtaining deviation value in PLC 5 inside after PID arithmetic, being transferred to D/A module and obtain analog quantity, PLC is controlled
Device 5 processed is by this analog quantity to control the aperture of control valve 10, and to complete negative-pressure feeding, negative-pressure feeding is for opening, closing phase
The vacuum answered, the control valve 10 of blowdown piping and the first regulation valve 6, second regulate the switching of valve 7, to realize automatically controlling
Complete to feed intake.
With reference to shown in Fig. 1, neutralizing the stage of reaction of reaction, the liquid caustic soda in liquid caustic soda bucket 2 by the second regulation valve 7 to
In liquid caustic soda measuring tank 1 after feed, when the weight of liquid caustic soda measuring tank 1 reaches to weigh intermediate weight that acquisition module 9 sets, claim
Weight acquisition module 9 transmits signal to PLC 5, and this process is: weight acquisition module moment monitoring liquid caustic soda measuring tank 1
With the gravimetric value neutralized in still 4, and be converted to digital transfer to PLC 5, PLC 5 by A/D module
By the value comparing actual value with set, internal after PID arithmetic in PLC 5 after obtaining deviation value, transmission
Obtaining analog quantity to D/A module, PLC 5 starts the increasing with weight by this analog quantity to control the second regulation valve 7
Add and be automatically adjusted the aperture of valve, until weight completely closes the second regulation valve 7 after reaching the value finally set, thus realize
Accurate measurement to liquid caustic soda charging, meanwhile, with above-mentioned operation principle, to the control feeding acid solution, it is also possible to logical
Overweight acquisition module, PLC 5 and the first regulation valve 6, realize the accurate measurement to acid solution charging.
With reference to shown in Fig. 2, in the second specific embodiment, including liquid caustic soda measuring tank 1, liquid caustic soda bucket 2, acid solution bucket 3,
Neutralizing still 4 and PLC 5, the top of described neutralization still 4 offers two charging apertures, and one of them charging aperture is successively
Connecting liquid caustic soda measuring tank 1 and liquid caustic soda bucket 2, another charging aperture connects acid solution bucket 3, it is characterized in that: described neutralization reaction unit
Also including the first regulation valve 6 and the accurate control unit for control accurate to material, the first regulation valve 6 is arranged on arbitrarily
On one charging aperture, described neutralization still 4 is built-in with temperature sensor 8, and the temperature signal neutralized in still 4 is delivered to PLC
Controller 5, and the switch traffic size of the first regulation valve 6 is controlled according to PLC 5.
With reference to shown in Fig. 2, described accurate control unit is accurately to be controlled material by Weighing module control system, institute
Stating accurate control unit is accurately to be controlled material by dosing pump control system 13.
With reference to shown in Fig. 2, described first regulation valve 6 is arranged between neutralization still 4 and liquid caustic soda measuring tank 1, and liquid caustic soda measures
Between tank 1 and liquid caustic soda bucket 2 and acid solution bucket 3 and neutralizing between still 4 is all connected by accurate control unit, described accurately
Control unit includes and is sequentially connected the control valve 10 of setting, dosing pump 11 and mass flowmenter 14, and described control valve 10
Arrange near liquid caustic soda bucket 2 or acid solution bucket 3.
With reference to shown in Fig. 2, in described liquid caustic soda measuring tank 1 and neutralization still 4, it is provided with high point liquid level and low spot liquid level, and
Realize liquid level by its internal pressure transducer arranged to show and data output.
With reference to shown in Fig. 2, the work of the second specific embodiment has following steps.
A: by being arranged on liquid caustic soda measuring tank 1 and the pressure transducer neutralized in still 4, realize the display to its liquid level
With the output of data, and the data exported are delivered to PLC 5.
B: neutralizing the reaction starting stage, the Data Control PLC 5 of pressure transducer output is thrown to complete material
Material, described material is to open, close the switching that product pump, control valve 10 and the first regulation valve 6 are opened, closed,
To realize having automatically controlled throwing.
C: neutralizing the reaction incipient stage, the material in liquid caustic soda bucket 2 and acid solution bucket 3 passes through dosing pump 11, quality stream
Gauge 14 flows to liquid caustic soda measuring tank 1 respectively and neutralizes still 4, and mass flowmenter 14 accumulation calculates the weight that material flows through, and works as thing
When material will reach the weight that mass flowmenter 14 sets, dosing pump 11 starts to be automatically adjusted opening of valve with the increase of weight
Degree is to reduce charging rate, until weight completely closes dosing pump 11, to complete the essence to material after reaching the value finally set
Really metering.
With reference to shown in Fig. 2, the operation principle of the second specific embodiment is: in the starting stage neutralizing reaction, due to liquid caustic soda
Bucket 2 and the liquid level neutralized in still 4 are below low spot liquid level, thus are played it by the pressure transducer of setting in it respectively
The real-time monitoring of liquid level, to realize the display to its liquid level and the output of data, and the data exported are delivered to PLC control
Device 5, this process is: pressure transducer moment monitoring liquid caustic soda measuring tank 1 and the actual pressure value neutralized in still 4, and passes through
A/D module is converted to digital transfer to PLC 5, PLC 5 by the value comparing actual value with set,
After obtaining deviation value in PLC 5 inside after PID arithmetic, being transferred to D/A module and obtain analog quantity, PLC is controlled
Device 5 processed is by this analog quantity to control the aperture of control valve 10, and to complete material, described material is for play open and close
Close the switching that product pump, control valve 10 and the first regulation valve 6 are opened, closed, to realize having automatically controlled throwing.
With reference to shown in Fig. 2, neutralizing the stage of reaction of reaction, neutralizing reaction incipient stage, liquid caustic soda bucket 2 and acid solution
Material in bucket 3 flows to liquid caustic soda measuring tank 1 respectively by dosing pump 11, mass flowmenter 14 and neutralizes still 4, mass flow
Meter 14 accumulation calculates the weight that material flows through, when material will reach the weight that mass flowmenter 14 sets, and dosing pump 11
Transmitting this process of signal to PLC 5 is: the material in dosing pump 11 moment monitoring liquid caustic soda bucket 2 and acid solution bucket 3
Flow, and be converted to digital transfer to PLC 5 by A/D module, PLC 5 is by comparing actual value
With the value set, after obtaining deviation value in PLC 5 inside after PID arithmetic, it is transferred to D/A module and obtains
Analog quantity, PLC 5 is by this analog quantity to control dosing pump 11, and dosing pump 11 starts with the increase of weight automatic
The aperture of control valve is to reduce charging rate, until weight completely closes dosing pump 11, with complete after reaching the value finally set
The accurate measurement of material in pairs.
With reference to shown in Fig. 1 or Fig. 2, it addition, the present invention can also control to neutralize the heat production speed of reaction heat in neutralizing still 4
Rate, the control principle neutralizing reaction heat is: neutralize in still 4 and heat that reaction produces by neutralize still 4 chuck, inner coil pipe or
Chilled water in outer circulation condenser is taken away, and the temperature neutralized in still 4 also control liquid caustic soda measuring tank 1 by temperature sensor 8
Charging rate to neutralizing still 4: a kind of mode raises for temperature in neutralization still 4 and regulates the first regulation valve 6 and the second regulation valve
The aperture of 7 diminishes, otherwise then aperture becomes big；Another way then regulates for regulation dosing pump 11, the temperature height neutralized in still 4
Flow aperture diminishes, otherwise then aperture becomes big.
Shown in reference Fig. 1 or Fig. 2, and, the flow that the first regulation valve 6, second regulates valve 7 and dosing pump 11 is permissible
Setting in PLC 5, the governing speed that the first regulation valve 6, second regulates valve 7 and dosing pump 11 then can be passed through
Pid parameter sets.
With reference to shown in Fig. 1 or Fig. 2, it addition, the operation of described control valve 10 all can operate on the touchscreen, chilled water
Turnover temperature is also to operate on the touchscreen, and touch screen is selected with RS485 communication interface, the single-chip microcomputer of temperature sensor 8
Product.
With reference to shown in Fig. 1 or Fig. 2, the invention have the advantages that first, by neutralizing course of reaction to material
Accurate control so that the consumption of acid solution and alkali liquor is controlled, so that acid solution is reacted completely with alkali liquor generation, it is to avoid acid solution
Or the unnecessary waste of alkali liquor；Second, by the accurate of material being controlled in neutralizing course of reaction so that acid solution and alkali liquor energy
Enough it is neutralized completely, thus does not interferes with the chemical property of product；3rd, by neutralizing in course of reaction material
Accurately control, be effectively guaranteed the effect of acid-base neutralization；4th, the present invention passes through PLC 5 Programmable Logic Controller
Powerful programming Control function, can work out different programs according to the demand of chemical technology, both can reduce Artificial Control and not
Stability, solves Artificial Control and difficult point, can set again multi-section time control flexibly, solves to neutralize automatically controlling of reaction
Function.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned enforcement
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that, for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (4)
1. neutralize an automatic control method for reaction unit, it is characterized in that: described neutralization reaction unit includes liquid caustic soda measuring tank, liquid caustic soda
Bucket, acid solution bucket, neutralization still and PLC, the top of described neutralization still offers two charging apertures, one of them
Charging aperture is sequentially connected with liquid caustic soda measuring tank and liquid caustic soda bucket, and another charging aperture connects acid solution bucket；
Described neutralization reaction unit also includes the first regulation valve and the accurate control unit for control accurate to material, described accurately
Control unit is accurately to be controlled material by Weighing module control system；
Described first regulation valve is arranged on any one charging aperture；
Described neutralization still is built-in with temperature sensor, and the temperature signal neutralized in still is delivered to PLC, and according to PLC
Controller controls the switch traffic size of the first regulation valve, and described first regulation valve is arranged between neutralization still and acid solution bucket；
It is connected with successively from liquid caustic soda measuring tank to neutralization still direction and is equipped with control valve and dosing pump, between described liquid caustic soda measuring tank and liquid caustic soda bucket also
It is provided with the second regulation valve for regulating liquid caustic soda uninterrupted；
Described accurate control unit includes and is arranged on liquid caustic soda measuring tank and neutralizes the acquisition module of weighing on still；
The weight signal of liquid caustic soda measuring tank and neutralization still is delivered to PLC by described acquisition module of weighing, and controls according to PLC
Device processed controls the switch traffic size of the second regulation valve；
It is mounted on Pressure gauge on described liquid caustic soda measuring tank and neutralization still；
Described first regulation valve is operated pneumatic valve or electrically operated valve, and described second regulation valve is operated pneumatic valve or electrically operated valve, described control
Valve is pneumatic ball valve；
The automatic control of described neutralization reaction unit comprises the following steps:
A: by being arranged on liquid caustic soda measuring tank and the pressure transducer neutralized in still, realizes the defeated of the display to its liquid level and data
Go out, and the data exported are delivered in PLC；
B: neutralizing the reaction starting stage, the Data Control PLC of pressure transducer output is to complete negative-pressure feeding, described
Negative-pressure feeding for opening, close corresponding vacuum, the control valve of blowdown piping and the first regulation valve, the second regulation the cutting of valve
Change, to realize having automatically controlled feeding intake；
C: neutralizing the reaction incipient stage, the material in liquid caustic soda bucket is by second regulation valve feed in liquid caustic soda measuring tank, acid solution bucket
Interior material to neutralizing still feed, when neutralizing temperature in the kettle liter, then regulates the first regulation valve and the second regulation by the first regulation valve
The aperture of valve diminishes, when liquid caustic soda measuring tank or neutralize the weight of still reach to weigh intermediate weight that acquisition module sets time, two
Regulation valve starts to be automatically adjusted the aperture of valve with the increase of weight, until weight completely closes two after reaching the value finally set
Individual regulation valve, to complete the accurate measurement to material.
A kind of automatic control method neutralizing reaction unit the most according to claim 1, is characterized in that: described accurate control unit is
By dosing pump control system, material is accurately controlled.
A kind of automatic control method neutralizing reaction unit the most according to claim 2, is characterized in that: described first regulation valve is arranged
Neutralizing between still and liquid caustic soda measuring tank；
All it is connected by accurate control unit between liquid caustic soda measuring tank and liquid caustic soda bucket and between acid solution bucket and neutralization still；
Described accurate control unit includes and is sequentially connected the control valve of setting, dosing pump and mass flowmenter, and described control valve is close
Liquid caustic soda bucket or acid solution bucket are arranged.
4. neutralize the automatic control method of reaction unit according to any one described in claims 1 to 3, it is characterized in that: described liquid caustic soda meter
It is provided with high point liquid level and low spot liquid level in measuring tank and neutralization still, and realizes liquid level by its internal pressure transducer arranged
Display and data export.
Priority Applications (1)
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| JP6816131B2 (en) * | 2015-09-30 | 2021-01-20 | バイエル、アクチエンゲゼルシャフトＢａｙｅｒ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ | Neutralization plant |
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| CN112439364A (en) * | 2020-12-04 | 2021-03-05 | 浙江中控技术股份有限公司 | High-precision automatic liquid feeding device and method |
| CN112694097B (en) * | 2021-02-07 | 2023-09-12 | 深圳瑞赛环保科技有限公司 | Control method for chemical waste disposal phosphoric acid treatment and aluminum phosphate molecular sieve synthesis |
| CN114367259B (en) * | 2021-12-17 | 2023-05-23 | 江苏春江润田农化有限公司 | Methyl trifluoroalkynoate apparatus for producing with batching automatically regulated is put in function |
| CN115382469B (en) * | 2022-09-23 | 2024-02-27 | 安徽华星化工有限公司 | O-cresol feeding device and implementation method thereof |
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Address after: 325025 Zhejiang Province, Wenzhou City Economic Development Zone Shacheng Industrial Zone 73 sand road No. 46 Applicant after: Shi Xueming Applicant after: WENZHOU SUOTE PHARMACEUTICAL AND CHEMICAL ENGINEERING CO., LTD. Address before: 325025 Zhejiang Province, Wenzhou City Economic Development Zone Shacheng Industrial Zone 73 sand road No. 46 Applicant before: WENZHOU SUOTE PHARMACEUTICAL AND CHEMICAL ENGINEERING CO., LTD. Applicant before: Shi Xueming |
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