CN112902447A - Hydrobromic acid mother liquor heating and thermal control device, method and application thereof - Google Patents
Hydrobromic acid mother liquor heating and thermal control device, method and application thereof Download PDFInfo
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- CN112902447A CN112902447A CN202110110327.4A CN202110110327A CN112902447A CN 112902447 A CN112902447 A CN 112902447A CN 202110110327 A CN202110110327 A CN 202110110327A CN 112902447 A CN112902447 A CN 112902447A
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- hydrobromic acid
- heating
- mother liquor
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- acid mother
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
- F24H7/0208—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using electrical energy supply
- F24H7/0233—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using electrical energy supply the transfer fluid being water
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/09—Bromine; Hydrogen bromide
- C01B7/096—Bromine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H2250/00—Electrical heat generating means
- F24H2250/08—Induction
Abstract
The invention belongs to the technical field of engineering heat transfer, and relates to a hydrobromic acid mother liquor heating and controlling device, a method and application thereof.A water reflux port on a liquid storage tank is connected with a water circulation output port pipeline above the left side of a silicon carbide heat exchanger to form a circulation loop, the lower part of the liquid storage tank is connected with a primary heating cylinder and a secondary heating cylinder through a circulation pump, the upper parts of the primary heating cylinder and the secondary heating cylinder are respectively connected with a pipeline above the silicon carbide heat exchanger, a hydrobromic acid mother liquor input port is arranged on the silicon carbide heat exchanger, and the hydrobromic acid mother liquor after heat exchange is output to a distillation tower through a hydrobromic acid mother liquor output port at the lower end of the left side of the silicon carbide heat exchanger to carry out subsequent processes, so that the temperature rise control of the; the cost is reduced, the heating power is reduced, the energy consumption is reduced, the service life of the device is long, the chlorine flow can be monitored in real time in the production process, the optimal state of the preparation of hydrobromic acid and chlorine is ensured, and the production efficiency is improved.
Description
The technical field is as follows:
the invention belongs to the technical field of engineering heat transfer, and relates to a hydrobromic acid mother liquor heating and heat controlling device, a method and application thereof.
Background art:
at present, in the production process of bromine, hydrobromic acid enters a distillation tower to react with chlorine to generate bromine element, and heating is needed, and the existing heating processes mainly comprise two processes, wherein one process is that a steam boiler generates steam to heat the distillation tower, and the other process is that an electromagnetic heating device heats hydrobromic acid mother liquor and then enters the distillation tower to react with chlorine to reduce bromine, wherein the steam boiler generates steam to heat the distillation tower, and the following defects exist: 1) the heat energy source of the steam boiler is electricity, the electric heat conversion utilization rate is low, and more than 18 percent of electric energy is dissipated through the electric heating ring; more than 28% of heat is dissipated in the heat transfer process, the utilization rate of the heat is generally not more than 50%, the efficiency is low, the energy consumption is high, the electric energy is seriously wasted, and the production cost is high; 2) the steam boiler has large thermal inertia, low heating speed and poor temperature control accuracy; 3) for a hot water pipeline and a boiler, scale is easily generated by heating an electric heating ring or an electric heating rod, the electric heating ring or the electric heating rod needs to be cleaned regularly, the heating efficiency is low, and the maintenance cost is too high; in addition, the electric heating rod is placed in water for a long time, so that the electric heating rod is easy to break the skin due to corrosion and leak electricity, and safety accidents are caused; 4) the boiler belongs to a pressure container, has high requirement on safety, needs to be regularly checked by national security departments every year, and can generate potential explosion hazards once problems occur; the electromagnetic heating is non-contact electromagnetic induction heating, the electromagnetic coil is a special high-temperature and high-voltage resistant wire, the insulating property is good, the electromagnetic coil does not need to be in direct contact with heating metal, the problems of electric leakage, short circuit and the like are fundamentally solved, the electric-heat conversion efficiency is as high as more than 90%, the coil loss is about 2%, the control unit loss is about 2%, the heating body can rapidly heat, the heat-preservation cotton can retain 98% of energy on the charging barrel, the heat is fully utilized, basically no loss exists, the electricity-saving effect is remarkably more than 38%, the production cost is greatly reduced, the thermal inertia of the electromagnetic heating device is small, the temperature of the inner wall and the outer wall of the charging barrel is consistent, the temperature control can be accurate to +/-1 ℃, the product quality is remarkably improved, the production efficiency is high, the normal open/closed interface of the temperature controller is adopted to control the, although the electromagnetic heating has the advantages, the liquid to be heated is hydrobromic acid mother liquor which has strong reducing acid characteristics and very strong corrosivity, so that the heat conductor of the heating device is required to have corrosion resistance, good magnetic conductivity and good heat conductivity to fully exert the advantages of the electromagnetic heating, otherwise, the heat loss is high, and the heating requirement cannot be met. In the existing materials, the requirements of less heat conduction materials with corrosion resistance, good magnetic conductivity and good heat conductivity are met, the price of a customized special-shaped product is high, the equipment manufacturing cost is high, the heat conductivity is not high, the heat loss is large, and the method is not suitable for heating the hydrobromic acid mother liquor. Therefore, a new hydrobromic acid mother liquor heating and controlling device, method and application thereof are urgently needed to be designed.
The invention content is as follows:
the invention aims to overcome the defects in the prior art, and provides a novel hydrobromic acid mother liquor heating and controlling device, a process method and application, so that the corrosion prevention problem of the hydrobromic acid mother liquor is solved under the condition of not reducing the thermal conductivity in the heating process, and the production and maintenance costs are reduced.
In order to achieve the purpose, the main structure of the hydrobromic acid mother liquor heating and controlling device comprises a control terminal, an electromagnetic heating control cabinet, a liquid storage tank, a circulating pump, a primary heating cylinder, a secondary heating cylinder and a silicon carbide heat exchanger, wherein water is filled in the liquid storage tank as a liquid heat source, a water return port is formed in the upper end of the right side of the liquid storage tank, the water return port is connected with a water circulation output port above the left side of the silicon carbide heat exchanger through a pipeline to form a circulation loop, the lower part of the liquid storage tank is connected with a water input port at the bottom of the primary heating cylinder and the secondary heating cylinder through a circulating pump, water output ports at the upper parts of the primary heating cylinder and the secondary heating cylinder are respectively connected with a water circulation input port above the silicon carbide heat exchanger through a pipeline, a hydrobromic acid mother liquor input port is formed in the position below the water circulation input port on, and a hydrobromic acid mother liquor output port is arranged at the lower end of the left side of the silicon carbide heat exchanger, and the hydrobromic acid mother liquor which is subjected to heat exchange and meets the process temperature requirement is output to a distillation tower through the hydrobromic acid mother liquor output port to carry out subsequent processes, so that the temperature rise control of the hydrobromic acid mother liquor is completed.
The primary heating cylinder and the secondary heating cylinder are both connected with temperature sensors with display functions, and are used for monitoring and displaying the temperature of heated water in the heating process, stopping heating when the temperature reaches a set temperature, and starting heating when the temperature is lower than the set temperature; the outside winding electromagnetic heating coil of one-level cartridge heater and second grade cartridge heater is equipped with insulating layer and heat preservation between cartridge heater and the electromagnetic heating coil, and the discharge pipe is all connected to the bottom of one-level cartridge heater and second grade cartridge heater, discharges the residual water when for example need empty the water in the cartridge heater under the circumstances such as maintenance.
The number of the heating barrels can be increased according to actual needs, and is not limited to two stages.
The specific process of heating and controlling the hydrobromic acid mother liquor comprises the following steps:
(1) water is input into the heating cylinder from the liquid storage tank through the circulating pump (the number of the heating cylinders is calculated through the actually required power), is heated step by step through the heating cylinder, is automatically heated to the set temperature of 98 ℃ by the electromagnetic heating control cabinet, and is directly sent to the water circulating input port of the silicon carbide heat exchanger;
(2) after entering the silicon carbide heat exchanger, water rapidly and fully exchanges heat with hydrobromic acid mother liquor in the silicon carbide heat exchanger, the hydrobromic acid mother liquor is heated to 80-85 ℃, the water subjected to heat exchange flows back to a liquid storage tank for storing water through a water circulation output port of the silicon carbide heat exchanger to be reheated to a design temperature, and the processes of electromagnetic heating-heat exchange-electromagnetic heating are carried out in a circulating reciprocating mode.
The water in the liquid storage tank can be replaced by heat conduction oil, and when the heat conduction oil is in the liquid storage tank, the heating temperature is set to be 98-110 ℃.
When the hydrobromic acid mother liquor heating and controlling device is used, a hydrobromic acid mother liquor output port at the lower end of the left side of the heat exchanger is connected with a distillation tower for use and is used for reacting with chlorine to prepare bromine.
In the process of preparing bromine, the chlorine automatic control system is adopted to replace free bromine to the maximum extent and improve the yield of bromine to the maximum extent by automatically controlling the flow of chlorine.
The structure of the chlorine automatic control system comprises a measuring pipeline, a chromatographic sampling device, a first flowmeter, a second flowmeter, a first electromagnetic valve, a second electromagnetic valve, a first chlorine tank, a second chlorine tank and a computer control terminal; the chromatographic sampling device is arranged on the measuring pipeline; a first flowmeter and a second flowmeter are connected above the measuring pipeline; the first flowmeter and the second flowmeter are respectively connected with a first electromagnetic valve and a second electromagnetic valve, the first electromagnetic valve and the second electromagnetic valve are connected with a first chlorine gas tank and a second chlorine gas tank which are connected in parallel after being connected in parallel, and the computer control terminal is respectively connected with the chromatographic sampling device, the first flowmeter, the second flowmeter, the first electromagnetic valve and the second electromagnetic valve.
The measuring pipeline of the invention is a certain section of pipeline in the distillation tower.
The chromatographic sampling device comprises a standard light source, a standard light source entrance port, a chromatographic acquisition window, a first light chopper, a second light chopper, a spectral analysis sensor, a base and a support, wherein the standard light source entrance port and the chromatographic acquisition window are oppositely arranged on a measuring pipeline, the first light chopper and the standard light source are sequentially arranged on the right side of the standard light source entrance port, the second light chopper is arranged on the left side of the chromatographic acquisition window, the spectral analysis sensor is connected with the second light chopper and fixedly arranged on the base through the support, a power supply and an RS485 interface are arranged on the spectral analysis sensor, and the spectral analysis sensor is connected with a computer control terminal through the RS485 interface.
The spectral analysis sensor is formed by sequentially connecting a lens, a diaphragm, a color filter and a CCD sensor.
The specific process for realizing the chlorine flow control comprises the following steps:
(1) the standard light source with the color temperature of 2980k is driven into the hydrobromic acid solution in the measuring pipeline through the first light shield and the standard light source entrance port, and due to the fact that the diffuse reflection coating is coated in the first light shield, the standard light source is uniformly emitted into the hydrobromic acid solution, soft, uniform and stable reflected light can be emitted by the hydrobromic acid solution, and the stability of spectrum sampling is improved;
(2) the spectral analysis sensor collects the reflected light of the hydrobromic acid solution through a second light chopper and a chromatographic collection window, the reflected light from the hydrobromic acid solution is processed by diffuse reflection through the second light chopper, the reflected light of the hydrobromic acid solution uniformly enters a lens of the spectral analysis sensor, light rays sequentially pass through the lens and a diaphragm of the spectral analysis sensor and are emitted into three groups of filters with wavelengths of 700 nanometers, 550 nanometers and 470 nanometers in the CCD sensor, the three groups of filters respectively transmit red, green and blue groups of light to absorb light with other chromaticities, the red, green and blue light passing through the filters are respectively projected to three areas on a target surface of the CCD sensor, and the CCD sensor respectively converts the three groups of light signals into electric signals to finish sampling of the chromatogram;
(3) the red, green and blue light converted into the electric signals are transmitted to a computer control terminal, the computer control terminal carries out chromatographic analysis on the received signals by adopting the existing chromatographic analysis software, compares the analysis result with a preset chromatographic reference standard, calculates the error and provides the error to a closed-loop control unit of the computer control terminal;
(4) the closed-loop control unit obtains analysis error data from the chromatographic analysis and comparison unit, adjusts the electromagnetic valves of the two chlorine pipelines according to error conditions, detects the adjusted chlorine flow through the flow meter, waits for next chromatographic error data after adjustment is finished, and continues to adjust until the chromatographic data enters an error range and is adjusted.
Compared with the prior art, the invention solves the problem of corrosion prevention of the hydrobromic acid mother liquor under the condition of not reducing the thermal conductivity in the heating process, reduces the production operation and maintenance cost, reduces the heating power of the hydrobromic acid mother liquor, saves the electricity cost, reduces the energy consumption, has long service life of the device, can monitor the chlorine flow in real time in the production process, ensures that the preparation of the hydrobromic acid and the chlorine reaches the optimal state, and improves the production efficiency.
Description of the drawings:
fig. 1 is a schematic diagram of a main structure principle of a hydrobromic acid mother liquor heating control device.
FIG. 2 is a schematic view of the connection between a hydrobromic acid mother liquor heating control device and a distillation tower.
FIG. 3 is a schematic diagram of the structural principle of the chlorine automatic control system of the present invention.
Fig. 4 is a schematic diagram of the structural principle of the chromatographic sampling device of the invention.
Fig. 5 is a schematic diagram of the structural principle of the spectral analysis sensor according to the present invention.
The specific implementation mode is as follows:
the invention is further illustrated by the following examples in conjunction with the accompanying drawings.
Example (b):
the main structure of the hydrobromic acid mother liquor heating and controlling device in this embodiment includes a control terminal 1, an electromagnetic heating control cabinet 2, a liquid storage tank 3, a circulating pump 4, a primary heating cylinder 5, a secondary heating cylinder 6 and a silicon carbide heat exchanger 7, water is filled in the liquid storage tank 3 as a liquid heat source, a water return port 8 is formed at the upper end of the right side of the liquid storage tank 3, the water return port 8 is connected with a water circulation output port 10 above the left side of the silicon carbide heat exchanger 7 through a pipeline to form a circulation loop, the lower part of the liquid storage tank 3 is connected with the primary heating cylinder 5 and a water input port 14 at the bottom of the secondary heating cylinder 6 through the circulating pump 4, a water output port 15 at the upper parts of the primary heating cylinder 5 and the secondary heating cylinder 6 is respectively connected with a water circulation input port 9 above the silicon carbide heat exchanger 7 through a pipeline, a hydrobromic acid mother liquor input port 11 is formed at, the heating device is used for inputting hydrobromic acid mother liquor to be heated, a hydrobromic acid mother liquor output port 12 is arranged at the lower end of the left side of the silicon carbide heat exchanger 7, the hydrobromic acid mother liquor which is subjected to heat exchange and meets the process temperature requirement is output to a distillation tower through the hydrobromic acid mother liquor output port 12 to perform subsequent processes, and temperature rise control of the hydrobromic acid mother liquor is completed.
In this embodiment, the primary heating cylinder 5 and the secondary heating cylinder 6 are both connected with a temperature sensor 13 with a display function, and are used for monitoring and displaying the temperature of the heated water in the heating process, stopping heating when the temperature reaches a set temperature, and starting heating when the temperature is lower than the set temperature; the electromagnetic heating coil 16 is wound outside the first-stage heating cylinder 5 and the second-stage heating cylinder 6, an insulating layer and a heat insulating layer are arranged between the heating cylinders and the electromagnetic heating coil 16, and the bottom ends of the first-stage heating cylinder 5 and the second-stage heating cylinder 6 are both connected with a discharge pipe 17 for discharging residual water when the water in the heating cylinders needs to be emptied under the conditions of maintenance and the like.
The number of stages of the heating cylinder in this embodiment may be set to other number of stages according to actual needs, and is not limited to two stages.
The specific process of heating and controlling the hydrobromic acid mother liquor in the embodiment is as follows:
(1) water is input into the heating cylinder from the liquid storage tank 3 through the circulating pump 4 (the number of the heating cylinder is calculated through the actually required power), is heated step by step through the heating cylinder, is automatically controlled to be heated to the set temperature of 98 ℃ by the electromagnetic heating control cabinet 2, and is directly sent to the water circulating input port 9 of the silicon carbide heat exchanger 7;
(2) after entering the silicon carbide heat exchanger 7, water rapidly and fully exchanges heat with hydrobromic acid mother liquor in the silicon carbide heat exchanger 7, the hydrobromic acid mother liquor is heated to 80-85 ℃, the water subjected to heat exchange flows back to the liquid storage tank 3 for storing water through the water circulation output port 10 of the silicon carbide heat exchanger 7 to be reheated to the design temperature, and the processes of electromagnetic heating, heat exchange and electromagnetic heating are circularly and repeatedly carried out.
In the embodiment, the water in the liquid storage tank 3 can be replaced by heat conduction oil, and when the heat conduction oil is in the liquid storage tank 3, the heating temperature is set to be 98-110 ℃.
When the hydrobromic acid mother liquor heating and controlling device in the embodiment is used, the hydrobromic acid mother liquor output port 12 at the lower end of the left side of the heat exchanger is connected with the distillation tower 18 for reaction with chlorine to prepare bromine.
In the process of preparing bromine, the chlorine automatic control system is adopted to automatically control the flow of chlorine to displace free bromine to the maximum extent and improve the yield of bromine to the maximum extent; in the existing bromine element preparation process, the judgment of the chlorine gas introduction amount mainly depends on manual experience or naked eye identification, the waste of raw materials is easily caused, the automatic chlorine gas control system replaces manual experience judgment, the product quality is ensured and improved, and the adjustment process is remotely and automatically controlled by a computer terminal without field adjustment.
The structure of the chlorine automatic control system in this embodiment includes a measuring pipeline 19, a chromatographic sampling device 20, a first flowmeter 21, a second flowmeter 22, a first electromagnetic valve 23, a second electromagnetic valve 24, a first chlorine tank 25, a second chlorine tank 26 and a computer control terminal 27; a chromatographic sampling device 20 is arranged on the measuring line 19; a first flowmeter 21 and a second flowmeter 22 are connected above the measuring pipeline 19; the first flowmeter 21 and the second flowmeter 22 are respectively connected with a first electromagnetic valve 23 and a second electromagnetic valve 24, the first electromagnetic valve 23 and the second electromagnetic valve 24 are connected with a first chlorine tank 25 and a second chlorine tank 26 which are connected in parallel after being connected in parallel, and the computer control terminal 27 is respectively connected with the chromatographic sampling device 20, the first flowmeter 21, the second flowmeter 22, the first electromagnetic valve 23 and the second electromagnetic valve 24.
The measuring line 19 in this example is a line that is located in the distillation column 18.
The chromatogram sampling device 20 of this embodiment includes standard light source 28, standard light source entrance port 29, chromatogram collection window 30, first photochopper 31, second photochopper 32, spectral analysis sensor 33, base 34 and support 35, standard light source entrance port 29 and chromatogram collection window 30 set up relatively on measuring tube 19, the right side of standard light source entrance port 29 is equipped with first photochopper 31 and standard light source 28 in proper order, the left side of chromatogram collection window 30 is equipped with second photochopper 32, spectral analysis sensor 33 is connected with second photochopper 32, and through support 35 fixed mounting on base 34, be provided with power and RS485 interface on the spectral analysis sensor 33, spectral analysis sensor 33 is connected with computer control terminal 27 through the RS485 interface.
The spectral analysis sensor 33 according to this embodiment is formed by connecting a lens 36, a diaphragm 37, a color filter 38, and a CCD sensor 39 in this order.
The specific process for controlling the flow of chlorine gas in this embodiment is as follows:
(1) the standard light source 28 with the color temperature of 2980k is driven into the hydrobromic acid solution in the measuring pipeline 20 through the first light shield 31 and the standard light source entrance port 29, and because the first light shield 31 is coated with the diffuse reflection coating, the standard light source is uniformly emitted into the hydrobromic acid solution, so that the hydrobromic acid solution can emit soft, uniform and stable reflected light, and the stability of spectral sampling is improved;
(2) the spectrum analysis sensor 33 collects the reflected light of the hydrobromic acid solution through the second light chopper 32 and the chromatogram collection window 30, the reflected light from the hydrobromic acid solution passes through the diffuse reflection treatment of the second light chopper 32, the reflected light of the hydrobromic acid solution uniformly enters the lens 36 of the spectrum analysis sensor 33, the light sequentially passes through the lens 36 and the diaphragm 37 of the spectrum analysis sensor 33 and enters three sets of filters with the wavelengths of 700 nanometers, 550 nanometers and 470 nanometers in the CCD sensor 39, the three sets of filters respectively transmit red, green and blue lights and absorb the lights with the rest chromaticities, the red, green and blue lights passing through the filters are respectively projected to three areas on the target surface of the CCD sensor 39, and the CCD sensor 39 respectively converts the three sets of optical signals into electric signals to finish the sampling of the chromatogram;
(3) the red, green and blue light converted into the electric signals are transmitted to the computer control terminal 27, the computer control terminal 27 performs chromatographic analysis on the received signals by adopting the existing chromatographic analysis software, compares the analysis result with a preset chromatographic reference standard, calculates the error and provides the error to a closed-loop control unit of the computer control terminal 27;
(4) the closed-loop control unit obtains analysis error data from the chromatographic analysis and comparison unit, adjusts the electromagnetic valves of the two chlorine pipelines according to error conditions, detects the adjusted chlorine flow through the flow meter, waits for next chromatographic error data after adjustment is finished, and continues to adjust until the chromatographic data enters an error range and is adjusted.
Claims (10)
1. The utility model provides a hydrobromic acid mother liquor heating accuse device which characterized in that: the main structure of the device comprises a control terminal, an electromagnetic heating control cabinet, a liquid storage tank, a circulating pump, a primary heating cylinder, a secondary heating cylinder and a silicon carbide heat exchanger, wherein water is filled in the liquid storage tank and is used as a liquid heat source, a water return port is formed in the upper end of the right side of the liquid storage tank, the water return port is connected with a water circulation output port above the left side of the silicon carbide heat exchanger through a pipeline to form a circulation loop, the lower part of the liquid storage tank is connected with the primary heating cylinder and a water input port at the bottom of the secondary heating cylinder through the circulating pump, water output ports at the upper parts of the primary heating cylinder and the secondary heating cylinder are respectively connected with a water circulation input port above the silicon carbide heat exchanger through pipelines, a hydrobromic acid mother liquor input port is formed in the position below the water circulation input port on the silicon carbide heat exchanger and is used for inputting hydrobromic acid mother liquor to be heated, a hydrobromic acid mother liquor output port is arranged at And (5) carrying out subsequent processes by the distillation tower to finish the temperature rise control of the hydrobromic acid mother liquor.
2. The hydrobromic acid mother liquor heating management device of claim 1, wherein: the primary heating cylinder and the secondary heating cylinder are both connected with temperature sensors with display functions, and are used for monitoring and displaying the temperature of heated water in the heating process, stopping heating when the temperature reaches a set temperature, and starting heating when the temperature is lower than the set temperature; the outside winding electromagnetic heating coil of one-level cartridge heater and second grade cartridge heater is equipped with insulating layer and heat preservation between cartridge heater and the electromagnetic heating coil, and the discharge pipe is all connected to the bottom of one-level cartridge heater and second grade cartridge heater, discharges the residual water when the water in the cartridge heater of needs emptying.
3. The hydrobromic acid mother liquor heating management device of claim 1, wherein: the number of the heating barrels can be increased according to actual needs.
4. A method for realizing heating control of hydrobromic acid mother liquor by using the device as in claim 1, which is characterized by comprising the following steps: the specific process is as follows:
(1) water is input into the heating cylinder from the liquid storage tank through the circulating pump, the number of the heating cylinders is determined through actual needs, the heating cylinder heats step by step, the electromagnetic heating control cabinet automatically controls the heating temperature, the heating temperature is accurately controlled to 98 ℃ set by the water, and the water is directly sent to the water circulating input port of the silicon carbide heat exchanger;
(2) after entering the silicon carbide heat exchanger, water rapidly and fully exchanges heat with hydrobromic acid mother liquor in the silicon carbide heat exchanger, the hydrobromic acid mother liquor is heated to 80-85 ℃, the water subjected to heat exchange flows back to a liquid storage tank for storing water through a water circulation output port of the silicon carbide heat exchanger to be reheated to a design temperature, and the processes of electromagnetic heating-heat exchange-electromagnetic heating are carried out in a circulating reciprocating mode.
5. The method for heating and controlling the hydrobromic acid mother liquor as in claim 4, wherein the method comprises the following steps: the water in the liquid storage tank can be replaced by heat conduction oil, and when the heat conduction oil is in the liquid storage tank, the heating temperature is set to be 98-110 ℃.
6. A method as claimed in claim 3, wherein: when the bromine preparation device is used, the hydrobromic acid mother liquor output port at the lower end of the left side of the heat exchanger is connected with a distillation tower for use and is used for reacting with chlorine to prepare bromine.
7. The application of the hydrobromic acid mother liquor heating control device as in claim 6, characterized in that: in the process of preparing the bromine element, a chlorine automatic control system is adopted to automatically control the flow of the chlorine.
8. The application of the hydrobromic acid mother liquor heating control device as in claim 7, characterized in that: the chlorine automatic control system structurally comprises a measuring pipeline, a chromatographic sampling device, a first flowmeter, a second flowmeter, a first electromagnetic valve, a second electromagnetic valve, a first chlorine tank, a second chlorine tank and a computer control terminal; the chromatographic sampling device is arranged on the measuring pipeline; a first flowmeter and a second flowmeter are connected above the measuring pipeline; the first flowmeter and the second flowmeter are respectively connected with a first electromagnetic valve and a second electromagnetic valve, the first electromagnetic valve and the second electromagnetic valve are connected with a first chlorine gas tank and a second chlorine gas tank which are connected in parallel after being connected in parallel, and the computer control terminal is respectively connected with the chromatographic sampling device, the first flowmeter, the second flowmeter, the first electromagnetic valve and the second electromagnetic valve.
9. The application of the hydrobromic acid mother liquor heating control device as in claim 8, characterized in that: the chromatographic sampling device comprises a standard light source, a standard light source entrance port, a chromatographic acquisition window, a first light chopper, a second light chopper, a spectral analysis sensor, a base and a support, wherein the standard light source entrance port and the chromatographic acquisition window are oppositely arranged on a measuring pipeline, the right side of the standard light source entrance port is sequentially provided with the first light chopper and the standard light source, the left side of the chromatographic acquisition window is provided with the second light chopper, the spectral analysis sensor is connected with the second light chopper and fixedly arranged on the base through the support, the spectral analysis sensor is provided with a power supply and an RS485 interface, and the spectral analysis sensor is connected with a computer control terminal through the RS485 interface; the spectral analysis sensor is formed by sequentially connecting a lens, a diaphragm, a color filter and a CCD sensor.
10. The application of the hydrobromic acid mother liquor heating control device as in claim 9, characterized in that: the specific process of the chlorine automatic control system for realizing the chlorine flow control is as follows:
(1) the standard light source with the color temperature of 2980k is driven into the hydrobromic acid solution in the measuring pipeline through the first light shield and the standard light source entrance port, and due to the fact that the diffuse reflection coating is coated in the first light shield, the standard light source is uniformly emitted into the hydrobromic acid solution, soft, uniform and stable reflected light can be emitted by the hydrobromic acid solution, and the stability of spectrum sampling is improved;
(2) the spectral analysis sensor collects the reflected light of the hydrobromic acid solution through a second light chopper and a chromatographic collection window, the reflected light from the hydrobromic acid solution is processed by diffuse reflection through the second light chopper, the reflected light of the hydrobromic acid solution uniformly enters a lens of the spectral analysis sensor, light rays sequentially pass through the lens and a diaphragm of the spectral analysis sensor and are emitted into three groups of filters with wavelengths of 700 nanometers, 550 nanometers and 470 nanometers in the CCD sensor, the three groups of filters respectively transmit red, green and blue groups of light to absorb light with other chromaticities, the red, green and blue light passing through the filters are respectively projected to three areas on a target surface of the CCD sensor, and the CCD sensor respectively converts the three groups of light signals into electric signals to finish sampling of the chromatogram;
(3) the red, green and blue light converted into the electric signals are transmitted to a computer control terminal, the computer control terminal carries out chromatographic analysis on the received signals by adopting the existing chromatographic analysis software, compares the analysis result with a preset chromatographic reference standard, calculates the error and provides the error to a closed-loop control unit of the computer control terminal;
(4) the closed-loop control unit obtains analysis error data from the chromatographic analysis and comparison unit, adjusts the electromagnetic valves of the two chlorine pipelines according to error conditions, detects the adjusted chlorine flow through the flow meter, waits for next chromatographic error data after adjustment is finished, and continues to adjust until the chromatographic data enters an error range and is adjusted.
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