Summary of the invention
For the deficiency that prior art exists, the object of the present invention is to provide a kind of device and automatic control method of neutralization reaction, by this kind of apparatus and method effectively in neutralization reaction process, to the accurate control that acid solution and alkali lye can be real-time, ensure that the effect of neutralization reaction.
For achieving the above object, the invention provides following technical scheme: a kind of neutralization reaction device, comprise liquid caustic soda measuring tank, liquid caustic soda bucket, acid solution bucket, in and still and PLC, in the described and top of still offers two charging apertures, one of them charging aperture connects liquid caustic soda measuring tank and liquid caustic soda bucket successively, another charging aperture connects acid solution bucket, described neutralization reaction device also includes the first control valve and the accurate control unit for accurately controlling material, first control valve is arranged on any one charging aperture, temperature sensor is built-in with still in described, and by and still in temperature signal be delivered to PLC, to be controlled the switch uninterrupted of the first control valve by PLC.
The present invention is set to further: described accurate control unit is accurately controlled material by Weighing module control system.
The present invention is set to further: during described first control valve is arranged on and between still and acid solution bucket, from liquid caustic soda measuring tank to and still is connected with successively and is equipped with control valve and measuring pump, the second control valve for regulating liquid caustic soda uninterrupted is also provided with between described liquid caustic soda measuring tank and liquid caustic soda bucket, described accurate control unit include be arranged on liquid caustic soda measuring tank and in and still on acquisition module of weighing, described weigh acquisition module by liquid caustic soda measuring tank and in and the weight signal of still be delivered to PLC, to control the switch uninterrupted of the second control valve and measuring pump.
The present invention is set to further: described liquid caustic soda measuring tank and in and still on all Pressure gauge is installed.
The present invention is set to further: described first control valve is operated pneumatic valve or electrically operated valve, and described second control valve is operated pneumatic valve or electrically operated valve, and described control valve is pneumatic ball valve.
The present invention is set to further: described accurate control unit is accurately controlled material by measuring pump control system.
The present invention is set to further: during described first control valve is arranged on and between still and liquid caustic soda measuring tank, between liquid caustic soda measuring tank and liquid caustic soda bucket and acid solution bucket and in and be all connected by accurate control unit between still, described accurate control unit includes the control valve, measuring pump and the mass flowmenter that are connected successively and arrange, and described control valve is arranged near liquid caustic soda bucket or acid solution bucket.
The present invention is set to further: described liquid caustic soda measuring tank and in and be provided with high some liquid level and low spot liquid level in still, and realize liquid level display and data output by its inner pressure sensor arranged.
The present invention is set to further: a kind of automatic control method of neutralization reaction device, includes following steps.
A: by be arranged on liquid caustic soda measuring tank and in and pressure sensor in still, realize the output of display to its liquid level and data, and the data exported are delivered to PLC.
B: in the neutralization reaction starting stage, the Data Control PLC that pressure sensor exports is to complete negative-pressure feeding, described negative-pressure feeding is for opening, closing corresponding vacuum, and the switching of the control valve of blowdown piping and the first control valve, the second control valve, to realize automatically having controlled to feed intake.
C: in the neutralization reaction incipient stage, material in liquid caustic soda bucket passes through the second control valve to feed in liquid caustic soda measuring tank, material in acid solution bucket by the first control valve in and still feed, when liquid caustic soda measuring tank or in and the weight of still reaches the intermediate weight of acquisition module setting of weighing time, two control valves start the aperture of the automatic regulating valve door with the increase of weight, until weight closes two control valves, completely to complete the accurate measurement to material after reaching the value of final setting.
The present invention is set to further: a kind of automatic control method of neutralization reaction device, includes following steps.
A: by be arranged on liquid caustic soda measuring tank and in and pressure sensor in still, realize the output of display to its liquid level and data, and the data exported are delivered to PLC.
B: in the neutralization reaction starting stage, the Data Control PLC that pressure sensor exports is to complete material, described material is open, close the switching that product pump, control valve and the first control valve open, close, to realize automatically having controlled throwing.
C: in the neutralization reaction incipient stage, material in liquid caustic soda bucket and acid solution bucket by measuring pump, mass flowmenter flow to respectively liquid caustic soda measuring tank and in and still, mass flowmenter accumulation calculates the weight that material flows through, when material will reach the weight of mass flowmenter setting, measuring pump starts the aperture of the automatic regulating valve door with the increase of weight to reduce charging rate, until weight closes measuring pump, completely to complete the accurate measurement to material after reaching the value of final setting.
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 not to the accurate control of acid solution or the charging of alkali lye amount, in the production of reality, all can have following problem: first, make carrying out in the process of reacting, there will be the consumption of acid solution more than alkali lye, or the consumption of alkali lye is more than the phenomenon of acid solution, add acid solution or the too much consumption of alkali lye, be unfavorable for environmental protection; The second, after neutralization, unnecessary acid solution or alkali lye can have influence on the chemical property (such as pH value) of product, thus can not reach people and estimate this performance reached of product, thus have impact on the production of subsequent technique; 3rd, in whole neutralization reaction process, can not carry out real-time accurate control, thus well can not ensure the effect of acid-base neutralization to neutralization reaction, therefore the present invention better resolves this problem by adopting following specific embodiment.
With reference to shown in Fig. 1, in the first specific embodiment, a kind of neutralization reaction device, comprise liquid caustic soda measuring tank 1, liquid caustic soda bucket 2, acid solution bucket 3, in and PLC 5 described in still 4 and PLC 5(select into: Siemens S7200CPU222), in the described and top of still 4 offers two charging apertures, one of them charging aperture connects liquid caustic soda measuring tank 1 and liquid caustic soda bucket 2 successively, another charging aperture connects acid solution bucket 3, it is characterized in that: described neutralization reaction device also includes the first control valve 6 and the accurate control unit for accurately controlling material, first control valve 6 is arranged on any one charging aperture, temperature sensor 8 is built-in with still 4 in described, and by and still 4 in temperature signal be delivered to PLC 5, and the switch uninterrupted of the first control valve 6 is controlled according to PLC 5.
With reference to shown in Fig. 1, described accurate control unit is accurately controlled material by Weighing module control system, during described first control valve 6 is arranged on and between still 4 and acid solution bucket 3, from liquid caustic soda measuring tank 1 to and still 4 is connected with successively and is equipped with control valve 10 and measuring pump 11, the second control valve 7 for regulating liquid caustic soda uninterrupted is also provided with between described liquid caustic soda measuring tank 1 and liquid caustic soda bucket 2, described accurate control unit include be arranged on liquid caustic soda measuring tank 1 and in and still 4 on acquisition module 9 of weighing, described weigh acquisition module 9 by liquid caustic soda measuring tank 1 and in and the weight signal of still 4 be delivered to PLC 5, and the switch uninterrupted of the second control valve 7 is controlled according to PLC 5.
With reference to shown in Fig. 1, described liquid caustic soda measuring tank 1 and in and still 4 is all provided with Pressure gauge 12, can real-time monitoring go out liquid caustic soda measuring tank 1 and in and pressure values in still 4.
With reference to shown in Fig. 1, described first control valve 6 is operated pneumatic valve or electrically operated valve, and described second control valve 7 is operated pneumatic valve or electrically operated valve, and described control valve 10 is pneumatic ball valve.
With reference to shown in Fig. 1, described liquid caustic soda measuring tank 1 and in and be provided with high some liquid level and low spot liquid level in still 4, and realize liquid level display and data output by its inner pressure sensor arranged.
With reference to shown in Fig. 1, the work of the first specific embodiment has following steps.
A: by be arranged on liquid caustic soda measuring tank 1 and in and pressure sensor in still 4, realize the output of display to its liquid level and data, and the data exported are delivered in PLC 5.
B: in the neutralization reaction starting stage, the Data Control PLC 5 that pressure sensor exports is to complete negative-pressure feeding, described negative-pressure feeding is for opening, closing corresponding vacuum, the control valve 10 of blowdown piping and the switching of the first control valve 6, second control valve 7, to realize automatically having controlled to feed intake.
C: in the neutralization reaction incipient stage, material in liquid caustic soda bucket 2 passes through the second control valve 7 to feed in liquid caustic soda measuring tank 1, material in acid solution bucket 3 by the first control valve 6 in and still 4 feed, when liquid caustic soda measuring tank 1 or in and the weight of still 4 reaches the intermediate weight that acquisition module 9 of weighing sets time, two control valves start the aperture of the automatic regulating valve door with the increase of weight, until weight closes two control valves, completely to complete the accurate measurement to material after reaching the value of final setting.
With reference to shown in Fig. 1, the operation principle of the first specific embodiment is: in the starting stage of neutralization reaction, due to liquid caustic soda bucket 2 and in and liquid level in still 4 all lower than low spot liquid level, thus play the Real-Time Monitoring to its liquid level respectively by the pressure sensor arranged in it, to realize the display of its liquid level and the output of data, and the data exported are delivered to PLC 5, this process is: pressure sensor moment monitoring liquid caustic soda measuring tank 1 and in and actual pressure value in still 4, and be that digital transfer arrives PLC 5 by A/D module converts, PLC 5 is by the value comparing actual value Yu set, after obtaining deviate in PLC 5 inside after PID arithmetic, be passed to D/A module and obtain analog quantity, PLC 5 passes through this analog quantity to control the aperture of control valve 10, to complete negative-pressure feeding, negative-pressure feeding is for opening, close corresponding vacuum, the control valve 10 of blowdown piping and the first control valve 6, the switching of the second control valve 7, to realize automatically having controlled to feed intake.
With reference to shown in Fig. 1, in the stage of reaction of neutralization reaction, liquid caustic soda in liquid caustic soda bucket 2 passes through the second control valve 7 after feed in liquid caustic soda measuring tank 1, when the weight of liquid caustic soda measuring tank 1 reaches the intermediate weight of acquisition module 9 setting of weighing, weigh acquisition module 9 to PLC 5 transmission of signal, this process is: heavy acquisition module moment monitoring liquid caustic soda measuring tank 1 and in and gravimetric value in still 4, and be that digital transfer arrives PLC 5 by A/D module converts, PLC 5 is by the value comparing actual value Yu set, after obtaining deviate in PLC 5 inside after PID arithmetic, be passed to D/A module and obtain analog quantity, PLC 5 by this analog quantity to control the aperture that the second control valve 7 starts the automatic regulating valve door with the increase of weight, until weight closes the second control valve 7 after reaching the value of final setting completely, thus the accurate measurement realized liquid caustic soda charging, meanwhile, with above-mentioned operation principle, to the control to acid solution charging, also can by heavy acquisition module, PLC 5 and the first control valve 6, realize the accurate measurement to acid solution charging.
With reference to shown in Fig. 2, in the second specific embodiment, comprise liquid caustic soda measuring tank 1, liquid caustic soda bucket 2, acid solution bucket 3, in and still 4 and PLC 5, in the described and top of still 4 offers two charging apertures, one of them charging aperture connects liquid caustic soda measuring tank 1 and liquid caustic soda bucket 2 successively, another charging aperture connects acid solution bucket 3, it is characterized in that: described neutralization reaction device also includes the first control valve 6 and the accurate control unit for accurately controlling material, first control valve 6 is arranged on any one charging aperture, temperature sensor 8 is built-in with still 4 in described, and by and still 4 in temperature signal be delivered to PLC 5, and the switch uninterrupted of the first control valve 6 is controlled according to PLC 5.
With reference to shown in Fig. 2, described accurate control unit is accurately controlled material by Weighing module control system, and described accurate control unit is accurately controlled by measuring pump control system 13 pairs of materials.
With reference to shown in Fig. 2, during described first control valve 6 is arranged on and between still 4 and liquid caustic soda measuring tank 1, between liquid caustic soda measuring tank 1 and liquid caustic soda bucket 2 and acid solution bucket 3 and in and be all connected by accurate control unit between still 4, described accurate control unit includes the control valve 10, measuring pump 11 and the mass flowmenter 14 that are connected successively and arrange, and described control valve 10 is arranged near liquid caustic soda bucket 2 or acid solution bucket 3.
With reference to shown in Fig. 2, described liquid caustic soda measuring tank 1 and in and be provided with high some liquid level and low spot liquid level in still 4, and realize liquid level display and data output by its inner pressure sensor arranged.
With reference to shown in Fig. 2, the work of the second specific embodiment has following steps.
A: by be arranged on liquid caustic soda measuring tank 1 and in and pressure sensor in still 4, realize the output of display to its liquid level and data, and the data exported are delivered to PLC 5.
B: in the neutralization reaction starting stage, the Data Control PLC 5 that pressure sensor exports is to complete material, described material is open, close the switching that product pump, control valve 10 and the first control valve 6 open, close, to realize automatically having controlled throwing.
C: in the neutralization reaction incipient stage, material in liquid caustic soda bucket 2 and acid solution bucket 3 by measuring pump 11, mass flowmenter 14 flow to respectively liquid caustic soda measuring tank 1 and in and still 4, the weight calculating material and flow through accumulated by mass flowmenter 14, when material will reach the weight of mass flowmenter 14 setting, measuring pump 11 starts the aperture of the automatic regulating valve door with the increase of weight to reduce charging rate, until weight closes measuring pump 11, completely to complete the accurate measurement to material after reaching the value of final setting.
With reference to shown in Fig. 2, the operation principle of the second specific embodiment is: in the starting stage of neutralization reaction, due to liquid caustic soda bucket 2 and in and liquid level in still 4 all lower than low spot liquid level, thus play the Real-Time Monitoring to its liquid level respectively by the pressure sensor arranged in it, to realize the display of its liquid level and the output of data, and the data exported are delivered to PLC 5, this process is: pressure sensor moment monitoring liquid caustic soda measuring tank 1 and in and actual pressure value in still 4, and be that digital transfer arrives PLC 5 by A/D module converts, PLC 5 is by the value comparing actual value Yu set, after obtaining deviate in PLC 5 inside after PID arithmetic, be passed to D/A module and obtain analog quantity, PLC 5 passes through this analog quantity to control the aperture of control valve 10, to complete material, described material is for opening, close product pump, control valve 10 and the first control valve 6 are opened, the switching of closing, to realize automatically having controlled throwing.
With reference to shown in Fig. 2, in the stage of reaction of neutralization reaction, in the neutralization reaction incipient stage, material in liquid caustic soda bucket 2 and acid solution bucket 3 is by measuring pump 11, mass flowmenter 14 flow to respectively liquid caustic soda measuring tank 1 and in and still 4, the weight calculating material and flow through accumulated by mass flowmenter 14, when material will reach the weight of mass flowmenter 14 setting, measuring pump 11 to this process of PLC 5 transmission of signal is: measuring pump 11 moment monitors the mass flow in liquid caustic soda bucket 2 and acid solution bucket 3, and be that digital transfer arrives PLC 5 by A/D module converts, PLC 5 is by the value comparing actual value Yu set, after obtaining deviate in PLC 5 inside after PID arithmetic, be passed to D/A module and obtain analog quantity, PLC 5 passes through this analog quantity to control measuring pump 11, measuring pump 11 starts the aperture of the automatic regulating valve door with the increase of weight to reduce charging rate, until weight closes measuring pump 11 after reaching the value of final setting completely, to complete the accurate measurement to material.
With reference to shown in Fig. 1 or Fig. 2, in addition, the present invention also can in and the rate of heat production of control neutralization reaction heat in still 4, the control principle of neutralization reaction heat is: in and still 4 neutralization reaction produce heat by and still 4 chuck, inner coil pipe or outer circulation condenser in chilled water take away, in and temperature in still 4 by temperature sensor 8 also control liquid caustic soda measuring tank 1 in and the charging rate of still 4: a kind of mode be in and in still 4 temperature raise and regulate the aperture of the first control valve 6 and the second control valve 7 to diminish, otherwise then aperture becomes large; Another kind of mode for regulating measuring pump 11, in and temperature height in still 4 then adjust flux aperture diminish, otherwise then aperture becomes large.
With reference to shown in Fig. 1 or Fig. 2, and the flow of the first control valve 6, second control valve 7 and measuring pump 11 can set in PLC 5, and the governing speed of the first control valve 6, second control valve 7 and measuring pump 11 then can be set by pid parameter.
With reference to shown in Fig. 1 or Fig. 2, in addition, the operation of described control valve 10 all can operate on the touchscreen, and chilled water turnover temperature is also to operate on the touchscreen, and touch-screen selects the single-chip microcomputer product with RS485 communication interface, temperature sensor 8.
With reference to shown in Fig. 1 or Fig. 2, the present invention has the following advantages: the first, by neutralization reaction process to the accurate control of material, make the consumption of acid solution and alkali lye controlled, to make acid solution and alkali lye generation complete reaction, avoid the unnecessary waste of acid solution or alkali lye; The second, by neutralization reaction process to the accurate control of material, acid solution and alkali lye can be neutralized completely, thus the chemical property of product can not be had influence on; 3rd, by neutralization reaction process to the accurate control of material, effectively ensure that the effect of acid-base neutralization; 4th, the present invention passes through the powerful programming Control function of PLC 5 Programmable Logic Controller, demand according to chemical technology can work out different programs, both Artificial Control and unstability can be reduced, solve Artificial Control and difficult point, multi-section time can be set again flexibly control, solve the automatic control function of neutralization reaction.
The above is only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, and all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.