CN216726987U - Cadmium chloride mixed crystal hydrate solution production system - Google Patents
Cadmium chloride mixed crystal hydrate solution production system Download PDFInfo
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- CN216726987U CN216726987U CN202122946424.5U CN202122946424U CN216726987U CN 216726987 U CN216726987 U CN 216726987U CN 202122946424 U CN202122946424 U CN 202122946424U CN 216726987 U CN216726987 U CN 216726987U
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Abstract
The present disclosure provides a cadmium chloride mixed crystal hydrate solution production system, which includes a cadmium chloride solution preparation portion, a cadmium chloride crystal hydrate mixing portion, and a filling portion; the cadmium chloride solution preparation part is used for directly preparing a cadmium chloride solution by adopting water, HCl and cadmium oxide together in situ; the cadmium chloride crystal hydrate mixing part is used for mixing the crystal hydrate with the cadmium chloride solution prepared by the cadmium chloride solution preparation part to form a cadmium chloride mixed crystal hydrate solution; the filling part is used for filling the cadmium chloride mixed crystal hydrate solution formed by the cadmium chloride crystal hydrate mixing part. Compared with the method that cadmium chloride is prepared firstly and then the aqueous solution of cadmium chloride is prepared by cadmium chloride and water, in the preparation part of the solution of cadmium chloride, cadmium chloride is formed by the reaction of HCl and cadmium oxide, and then the solution of cadmium chloride is formed by the cadmium chloride in situ and water, so that the process steps and related equipment are saved, and the production cost is reduced.
Description
Technical Field
The disclosure relates to the application field of cadmium chloride solution, in particular to a production system of cadmium chloride mixed crystal hydrate solution.
Background
In a thin film solar cell, a cadmium chloride solution is often used to form a cadmium chloride modification layer to improve the electron transport efficiency of the thin film solar cell.
In general, the cadmium chloride solution is prepared by preparing cadmium chloride and then preparing the cadmium chloride and water. In order to further improve the performance of the thin film solar cell, it is generally adopted to further add crystal hydrate (for example, potassium chloride) to a cadmium chloride solution, thereby forming a cadmium chloride mixed crystal hydrate solution.
Most of the existing cadmium chloride mixed crystal hydrate solutions are manually prepared, and the efficiency is low.
In addition, the control precision of manually preparing the cadmium chloride mixed crystal hydrate solution is low.
SUMMERY OF THE UTILITY MODEL
In view of the problems in the background art, it is an object of the present disclosure to provide a cadmium chloride mixed crystal hydrate solution production system that can simplify the process and equipment for preparing a cadmium chloride mixed crystal hydrate solution and reduce costs.
Thus, in some embodiments, a cadmium chloride mixed crystal hydrate solution production system includes a cadmium chloride solution formulation section, a cadmium chloride crystal hydrate mixing section, and a filling section; the cadmium chloride solution preparation part is used for directly preparing a cadmium chloride solution by adopting water, HCl and cadmium oxide together in situ; the cadmium chloride crystal hydrate mixing part is used for mixing the crystal hydrate with the cadmium chloride solution prepared by the cadmium chloride solution preparation part to form a cadmium chloride mixed crystal hydrate solution; the filling part is used for filling the cadmium chloride mixed crystal hydrate solution formed by the cadmium chloride crystal hydrate mixing part.
In some embodiments, the cadmium chloride solution preparation part comprises a water supply line, an HCl supply line, a cadmium oxide supply line and a reaction kettle, wherein the water supply line is used for supplying water into the reaction kettle; the HCl supply line is used for supplying HCl solution into the reaction kettle; the cadmium oxide supply line is used for supplying cadmium oxide into the reaction kettle; the reaction kettle is used for reacting the cadmium oxide and the HCl fed into the reaction kettle to form cadmium chloride, and the formed cadmium chloride and water form a cadmium chloride solution.
In some embodiments, the water supply line includes a water supply line, a water supply pump, a water supply flow meter, and a water supply solenoid valve, the water supply line being connected between the water supply pump and the reaction kettle; the water supply pump is used for pumping external water to the reaction kettle through the water supply pipeline; a water supply flow meter provided in the water supply line for measuring a flow rate of water in the water supply line; the water supply solenoid valve is provided in the water supply line, and adjusts the flow rate of water in the water supply line.
In some embodiments, the HCl supply line includes an HCl storage tank, an HCl supply line, an HCl supply pump, an HCl supply flow meter, and an HCl supply solenoid valve, the HCl storage tank storing an HCl solution; the HCl supply pipeline is connected between the HCl storage tank and the reaction kettle; the HCl supply pump is arranged on the HCl supply pipeline and used for pumping the HCl solution in the HCl storage tank to the reaction kettle through the HCl supply pipeline; an HCl supply flow meter provided in the HCl supply line, the HCl supply flow meter measuring a flow rate of the HCl solution in the HCl supply line; the HCl supply solenoid valve is provided in the HCl supply line, and adjusts the flow rate of the HCl solution in the HCl supply line.
In some embodiments, the reaction kettle comprises a kettle body, and the kettle body is communicated with a water supply line, an HCl supply line and a cadmium oxide supply line.
In some embodiments, the cadmium chloride solution preparation part further comprises a first detection module and a constant volume stirring tank; the first detection module comprises a first pump, a first filter and a first sampling line, a first pump inlet of the first pump is controlled to be communicated with a bottom outlet of the reaction kettle, and a first pump outlet of the first pump is controlled to be communicated with the reaction kettle; the first filter inlet of the first filter is in controlled communication with the first pump outlet of the first pump; the first sampling line is in controlled communication with a first filter outlet of the first filter, and is used for sampling and detecting the pH value and specific gravity of the cadmium chloride solution formed by the reaction kettle through the communicated first filter, the first pump and the reaction kettle; the constant-volume stirring tank is controlled to be communicated with the first filter outlet of the first filter.
In some embodiments, the constant volume stirring tank is also in controlled communication with a water supply line for supplying water into the constant volume stirring tank; the constant-volume stirring tank is also communicated with an HCl supply line in a controlled manner and is used for supplying an HCl solution into the constant-volume stirring tank; the cadmium chloride solution preparation part also comprises a second detection module, the second detection module comprises a second pump, a second filter and a second sampling line, and a second pump inlet of the second pump is controlled to be communicated with a bottom outlet of the constant-volume stirring tank; the second filter inlet of the second filter is in controlled communication with the second pump outlet of the second pump; the second sampling line is controlled to be communicated with a second filter outlet of the second filter, and is used for sampling and detecting the pH value and the specific gravity of the cadmium chloride solution in the constant-volume stirring tank through the communicated second filter, the second pump and the constant-volume stirring tank; and the outlet of the second filter is controlled to be communicated with the cadmium chloride crystal hydrate mixing part.
In some embodiments, the cadmium chloride crystal hydrate mixing section comprises a mixing and stirring tank, a crystal hydrate supply line, and a weighing mechanism, the mixing and stirring tank comprising a tank body in controlled communication with the cadmium chloride solution dispensing section to receive the cadmium chloride solution; the crystal hydrate supply line is used for supplying crystal hydrates to the tank body of the mixing and stirring tank; the mixing and stirring tank also comprises a stirrer, and the stirrer is used for stirring the mixture of the crystal hydrate and the cadmium chloride solution in the tank body; the weighing mechanism is located below the tank body of the mixing and stirring tank and supports the tank body of the mixing and stirring tank, and the weighing mechanism is used for weighing the tank body of the mixing and stirring tank.
In some embodiments, the cadmium chloride crystal hydrate mixing section further comprises a third detection module and a finished product constant volume tank; the third detection module comprises a third pump, a third filter and a third sampling line, and a third pump inlet of the third pump is controlled to be communicated with a lower outlet of the tank body of the mixing and stirring tank; the third filter inlet of the third filter is in controlled communication with the third pump outlet of the third pump; the third sampling line is controlled to be communicated with an outlet of a third filter of the third filter, and is used for sampling and detecting the cadmium chloride mixed crystal hydrate solution in the mixing and stirring tank through the communicated third filter, a third pump and the mixing and stirring tank so as to determine whether the content of the crystal hydrate in the cadmium chloride mixed crystal hydrate solution in the mixing and stirring tank meets the requirement or not; the outlet of the third filter is also in controlled communication with the mixing and stirring tank so as to pump the cadmium chloride mixed crystal hydrate solution discharged from the lower outlet of the tank body of the mixing and stirring tank back to the mixing and stirring tank after the sampling detection of the third sampling line is unqualified; and the finished product constant volume tank is controlled to be communicated with the outlet of the third filter so as to receive the cadmium chloride mixed crystal hydrate solution from the mixing and stirring tank which is qualified through inspection.
In some embodiments, the cadmium chloride crystal hydrate mixing section further comprises a fourth detection module; the fourth detection module comprises a fourth pump, a fourth filter and a fourth sampling line; a fourth pump inlet of the fourth pump is controlled and communicated with a lower discharge port of the finished product constant volume tank; the fourth filter inlet of the fourth filter is in controlled communication with the fourth pump outlet of the fourth pump; the fourth sampling line is controlled to be communicated with a fourth filter outlet of the fourth filter, and is used for sampling and detecting the cadmium chloride mixed crystal hydrate solution in the finished product constant volume tank through the communicated fourth filter, a fourth pump and the finished product constant volume tank so as to determine whether the content of the crystal hydrate in the cadmium chloride mixed crystal hydrate solution in the finished product constant volume tank meets the requirement or not; the outlet of the fourth filter is also in controlled communication with the finished product constant volume tank, so that the cadmium chloride mixed crystal hydrate solution in the finished product constant volume tank is pumped back to the finished product constant volume tank after sampling detection is unqualified by the fourth sampling line; and the outlet of the fourth filter is also in controlled communication with the tank body of the mixing and stirring tank, so that the cadmium chloride mixed crystal hydrate solution in the finished product constant volume tank is pumped back to the tank body of the mixing and stirring tank after sampling detection is unqualified through the fourth sampling line.
The beneficial effects of this disclosure are as follows: compared with the method that cadmium chloride is prepared firstly and then the aqueous solution of cadmium chloride is prepared by cadmium chloride and water, in the preparation part of the solution of cadmium chloride, cadmium chloride is formed by the reaction of HCl and cadmium oxide, and then the solution of cadmium chloride is formed by the cadmium chloride in situ and water, so that the process steps and related equipment are saved, and the production cost is reduced.
Drawings
Fig. 1 is a schematic diagram of a cadmium chloride mixed crystal hydrate solution production system according to the present disclosure.
Wherein the reference numerals are as follows:
second pump outlet of 100 b cadmium chloride mixed crystal hydrate solution production system 171b
Second filter of 1 cadmium chloride solution preparation part 172
11 water supply line 172a second filter
111 water supply pipeline port
112 water supply pump 172b second filter outlet
113 flow meter port for water supply
114 water supply solenoid valve 173 second sampling line
12HCl is supplied to a line 2 cadmium chloride crystal hydrate mixing section
121HCl storage tank 21 mixing stirring tank
125HCl supply solenoid valve 22 crystalline hydrate supply line
13 cadmium oxide supply line 221 screw conveyer
131 screw conveyer 23 weighing mechanism
14 reation kettle 24 third detection module
141 kettle 241 third pump
142 wrap 241a third pump inlet
143 condenser 241b third pump outlet
143b condenser coil 242a third filter
144 port of stirring device
145 integral temperature transmitter 242b third filter outlet
146 bottom outlet
15 first detection module 243 third sampling line
151 first pump 25 finished product constant volume tank
151a first pump inlet 251 discharge
151b first Pump Outlet 26 fourth detection Module
152 first filter 261 fourth pump
152a first filter inlet 261a fourth pump inlet
152b first filter outlet 261b fourth Pump Outlet
153 first sampling line 262 fourth filter
16 constant volume agitator tank 262a fourth filter inlet
161 bottom outlet 262b fourth filter outlet
162 exhaust air pipe 263 fourth sampling line
17 regional tail gas convulsions loudspeaker of second detection module 27
171 filling part of second pump 3
171a second pump inlet 31 finished product filling barrel
32 balance
4PLC control operation station
Detailed Description
The accompanying drawings illustrate embodiments of the disclosure and it is to be understood that the disclosed embodiments are merely examples of the disclosure, which may be embodied in various forms, and therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure.
Referring to fig. 1, a cadmium chloride mixed crystal hydrate solution production system 100 includes a cadmium chloride solution preparation unit 1, a cadmium chloride crystal hydrate mixing unit 2, and a filling unit 3.
The cadmium chloride solution preparation part 1 is used for directly preparing a cadmium chloride solution by adopting water, HCl and cadmium oxide together in situ. The cadmium chloride crystal hydrate mixing section 2 is for mixing the crystal hydrate with the cadmium chloride solution prepared by the cadmium chloride solution preparing section 1 to form a cadmium chloride mixed crystal hydrate solution. The filling part 3 is used for filling the cadmium chloride mixed crystal hydrate solution formed by the cadmium chloride crystal hydrate mixing part 2.
Compared with the method that cadmium chloride is prepared firstly and then the aqueous solution of cadmium chloride is prepared by cadmium chloride and water, in the preparation part 1 of the solution of cadmium chloride, cadmium chloride is formed by the reaction of HCl and cadmium oxide, and then the solution of cadmium chloride is formed by the cadmium chloride in situ and the water, so that the process steps and related equipment are saved, and the production cost is reduced.
In the cadmium chloride mixed crystal hydrate solution production system 100, the automation degree of the preparation of the cadmium chloride mixed crystal hydrate solution is improved by the arrangement of the cadmium chloride solution preparation part 1, the cadmium chloride crystal hydrate mixing part 2 and the filling part 3.
As shown in fig. 1, in one example, the cadmium chloride solution preparing part 1 includes a water supply line 11, an HCl supply line 12, a cadmium oxide supply line 13, and a reaction tank 14.
The water supply line 11 is used for supplying water into the reaction kettle 14; an HCl supply line 12 is used for supplying HCl solution into the reaction kettle 14; a cadmium oxide supply line 13 for supplying cadmium oxide into the reaction vessel 14; the reaction vessel 14 is used for reacting the cadmium oxide and HCl fed therein to form cadmium chloride and the formed cadmium chloride and water to form a cadmium chloride solution.
Referring to fig. 1, in one embodiment, the water supply line 11 includes a water supply pipe 111, a water supply pump 112, a water supply flow meter 113, and a water supply solenoid valve 114. The water supply line 111 is connected between the water supply pump 112 and the reaction tank 14. The water supply pump 112 pumps external water to the reaction tank 14 through the water supply line 111. The water supply flow meter 113 is provided in the water supply pipe 111, and the water supply flow meter 113 measures the flow rate of water in the water supply pipe 111. A water supply solenoid valve 114 is provided in the water supply line 111, and the water supply solenoid valve 114 adjusts the flow rate of water in the water supply line 111.
The water supply pump 112 may be a stainless steel pure water pump.
The positional relationship between the water supply flow meter 113 and the water supply solenoid valve 114 on the water supply line 111 upstream and downstream is not limited, and it is preferable that the water supply flow meter 113 is located upstream of the water supply solenoid valve 114 as shown in fig. 1. The water is fed through the water supply flow meter 113 and then through the water supply solenoid valve 114, which is advantageous for the accuracy of water supply, and the water supply flow meter 113 measures the flow rate of water in the water supply line 111 (i.e., the amount of water delivered), and when the amount of water delivered reaches a predetermined value (for example, when the water is communicated to a PLC control operation station described later), the water supply solenoid valve 114 is immediately closed to stop the water delivery (for example, by the PLC control operation station described later).
Referring to fig. 1, in one embodiment, the HCl supply line 12 includes an HCl storage tank 121, an HCl supply line 122, an HCl supply pump 123, an HCl supply flow meter 124, and an HCl supply solenoid 125. The HCl storage tank 121 stores HCl solution; an HCl supply line 122 is connected between the HCl storage tank 121 and the reaction tank 14; an HCl supply pump 123 is provided on the HCl supply line 122, and the HCl supply pump 123 is configured to pump the HCl solution in the HCl storage tank 121 to the reaction tank 14 through the HCl supply line 122; an HCl supply flow meter 124 provided in the HCl supply line 122, the HCl supply flow meter 124 measuring a flow rate of the HCl solution in the HCl supply line 122; an HCl supply solenoid valve 125 is provided in the HCl supply line 122, and the HCl supply solenoid valve 125 adjusts the flow rate of the HCl solution in the HCl supply line 122. In the present disclosure, the HCl solution in HCl storage tank 121 is an analytically pure hydrochloric acid solution. In order to prevent the hydrochloric acid corrosion, a perfluoro pump is used as the HCl supply pump 123.
Referring to fig. 1, in one embodiment, the cadmium oxide feed line 13 includes a screw conveyor 131. The screw conveyor 131 is used to supply cadmium oxide powder to the reaction tank 14.
Referring to fig. 1, in one embodiment, reaction vessel 14 includes a vessel body 141. The kettle body 141 is communicated with a water supply line 11, an HCl supply line 12 and a cadmium oxide supply line 13.
Referring to fig. 1, in one embodiment, reaction vessel 14 further includes jacket 142. The jacket 142 is sleeved on the periphery of the reaction kettle 14, and the jacket 142 is used for being communicated with external circulating cooling water to cool the kettle body 141. This is because cadmium chloride formed by the reaction of cadmium oxide and hydrogen chloride in the reaction vessel 14 is an exothermic reaction, and the temperature of the reaction vessel 14 needs to be lowered by circulating cooling water from the outside because the temperature of the reaction vessel is not lowered by only water for forming a cadmium chloride solution.
Correspondingly, reaction vessel 14 also includes a condenser 143. The condenser 143 is disposed on the kettle body 141, and the condenser 143 is configured to condense and converge water vapor formed during the reaction process of the cadmium oxide and the hydrogen chloride into the reaction kettle 14, so as to prevent the water vapor from taking away a part of the solution, thereby preventing the amount of the formed cadmium chloride solution from being affected. As shown in fig. 1, the condenser 143 has a cylinder 143a and a condensing coil 143 b. One end of the cylinder 143a is connected to the inside of the kettle 141, and the other end of the cylinder 143a can be opened and closed under control, preferably, the other end of the cylinder 143a is closed during the whole production process, so as to ensure that no cadmium chloride solution is brought out because the steam is discharged to the environment. The cylinder 143a may be a glass tube. The condenser coil 143b is fed with circulating cooling water.
As shown in fig. 1, in one example, reaction vessel 14 further includes an agitation mechanism 144. The stirring mechanism 144 is used for stirring the raw materials and the products of the reaction kettle 14 which generate the cadmium chloride solution. Thereby, the reaction process of the cadmium oxide and the hydrogen chloride is accelerated, and the uniformity of the formed cadmium chloride solution is accelerated.
As shown in fig. 1, since cadmium chloride is an exothermic reaction formed by the reaction of cadmium oxide and hydrogen chloride, the reaction vessel 14 further includes an integrated temperature transmitter 145 for monitoring the temperature. The integrated temperature transmitter 145 penetrates the kettle body 141, and the integrated temperature transmitter 145 is used for detecting the temperature of the reactant in the kettle body 141 when the cadmium chloride solution is generated. Based on the monitored temperature, the jacket 142 is correspondingly controlled to introduce circulating cooling water to cool the reaction kettle 14, and further, the cadmium chloride solution is cooled, so that the temperature of the reaction kettle 14 is controlled within a specified temperature. The integrated temperature transmitter 145 can realize high-reliability and high-precision temperature detection, and is favorable for precise control of the temperature of the reaction kettle 14.
Compared with the prior art in which cadmium chloride is prepared first and then cadmium chloride and water are prepared, in the cadmium chloride mixed crystal hydrate solution production system 100, the cadmium chloride solution preparation part 1 directly adopts water, HCl and cadmium oxide to prepare the cadmium chloride solution in situ (specifically in the kettle body 141 of the reaction kettle 14), thereby simplifying the process and related equipment and reducing the cost.
In order to further improve the preparation accuracy of the cadmium chloride solution, as shown in fig. 1, in one example, the cadmium chloride solution preparation unit 1 further includes a first detection module 15 and a constant volume stirring tank 16.
The first detection module 15 includes a first pump 151, a first filter 152, and a first sampling line 153. The first pump inlet 151a of the first pump 151 is in controlled communication with the bottom outlet 146 of the reaction tank 14, and the first pump outlet 151b of the first pump 151 is in controlled communication with the reaction tank 14. The first filter inlet 152a of the first filter 152 is in controlled communication with the first pump outlet 151b of the first pump 151. The first sampling line 153 is in controlled communication with the first filter outlet 152b of the first filter 152, and the first sampling line 153 is used for performing pH and specific gravity sampling detection on the cadmium chloride solution formed in the reaction kettle 14 through the first filter 152, the first pump 151 and the reaction kettle 14 which are in communication. The constant volume agitator tank 16 is in controlled communication with the first filter outlet 152b of the first filter 152. Likewise, in one example, the first pump 151 employs a perfluorinated pump to avoid corrosion by hydrogen chloride.
In operation, if the pH value detected by sampling is lower, the amount of cadmium oxide powder needs to be added to raise the pH value, namely, the cadmium oxide supply line 13 increases the amount of cadmium oxide powder needed to be added; if the pH value of the sampling test is too high, the amount of the hydrogen chloride solution needs to be increased to lower the pH value, that is, the HCl supply line 12 increases the amount of the hydrogen chloride solution needed to be increased (specifically, by the HCl supply flow meter 124); if the specific gravity of the cadmium chloride solution sampled and detected is low, the amount of cadmium oxide powder needs to be added to increase the specific gravity, namely the cadmium oxide supply line 13 increases the amount of cadmium oxide powder needed to be added; if the specific gravity of the cadmium chloride solution sampled for detection is too high, the amount of the hydrogen chloride solution needs to be increased to lower the specific gravity, i.e., the HCl supply line 12 increases the amount of the hydrogen chloride solution needed to be increased (specifically, by the HCl supply flow meter 124). Further, for the pH value lower/higher and the specific gravity lower/higher (both of these cases are unqualified) of the sampling detection, the first pump outlet 151b of the first pump 151 is connected to the reaction kettle 14 and disconnected from the constant volume stirring tank 16, the cadmium chloride solution formed in the reaction kettle 14 is pumped back into the reaction kettle 14 through the bottom outlet 146 of the reaction kettle 14, the first pump 151 and the top inlet of the reaction kettle 14 until the pH value and the specific gravity of the sampling detection are qualified, the first pump outlet 151b of the first pump 151 is disconnected from the connection with the reaction kettle 14 and connected to the constant volume stirring tank 16, and the qualified cadmium chloride solution is supplied to the constant volume stirring tank 16. Note that, in the cadmium chloride mixed crystal hydrate solution production system, it is determined that both the pH reference of the lower/higher pH value and the specific gravity reference of the lower/higher specific gravity are ranges, and the aforementioned amount of the hydrogen chloride solution added and the amount of the cadmium oxide powder are determined on the pH reference and the specific gravity reference. Sampling of the pH and specific gravity can be measured by any suitable known instrument.
The constant-volume stirring tank 16 is also in controlled communication with the water supply line 11 and is used for supplying water into the constant-volume stirring tank 16; the constant-volume stirring tank 16 is also in controlled communication with the HCl supply line 12 and is used for supplying HCl solution into the constant-volume stirring tank 16; the cadmium chloride solution preparation part 1 further comprises a second detection module 17, the second detection module 17 comprises a second pump 171, a second filter 172 and a second sampling line 173, and a second pump inlet 171a of the second pump 171 is controlled to be communicated with the bottom outlet 161 of the constant volume stirring tank 16; the second filter inlet 172a of the second filter 172 is controlled to communicate with the second pump outlet 171b of the second pump 171; the second sampling line 173 is in controlled communication with the second filter outlet 172b of the second filter 172, and the second sampling line 173 is used for performing pH and specific gravity sampling detection on the cadmium chloride solution in the constant volume stirring tank 16 through the second filter 172, the second pump 171 and the constant volume stirring tank 16 which are in communication; the second filter outlet 172b of the second filter 172 is in controlled communication with the cadmium chloride crystal hydrate mixing section 2. Similarly, the second pump 171 employs a perfluoro pump to avoid corrosion by hydrogen chloride.
The function of the second detection module 17 is the same as that of the first detection module 15, and it is determined whether the pH value deviates from the pH reference and whether the specific gravity deviates from the specific gravity reference, the object targeted by the first detection module 15 is the reaction kettle 14, and the object targeted by the second detection module 17 is the constant volume stirring tank 16.
If the cadmium chloride solution sampled through the second sampling line 173 is qualified, the cadmium chloride solution in the constant volume stirring tank 16 enters the cadmium chloride crystal hydrate mixing part 2 through the bottom outlet 161, the second pump 171 and the second filter 172.
If the cadmium chloride solution sampled through the second sampling line 173 is not qualified, specifically, if the pH value sampled and detected through the second sampling line 173 is low, an amount of water needs to be added to raise the pH value, that is, the amount of water needed to be added is increased to the constant volume stirring tank 16 through the water supply line 12; if the pH value sampled and detected by the second sampling line 173 is too high, the amount of the hydrogen chloride needs to be added to increase the pH value, that is, the amount of the hydrogen chloride solution needed to be added is increased to the constant volume stirring tank 16 through the HCl supply line; if the specific gravity sampled and detected by the second sampling line 173 is low, the cadmium chloride solution in the constant volume stirring tank 16 is returned to the constant volume stirring tank 16 through the bottom outlet 161 and the second pump 171 and the amount of cadmium oxide powder to be added is increased to the reaction kettle 14 through the aforementioned cadmium oxide supply line 13 (specifically, through the communication control of the PLC control operation station 4 described later); if the specific gravity sampled and detected by the second sampling line 173 is too high, the amount of water to be added is required to decrease the specific gravity, that is, the amount of water required to be added is increased to the constant volume agitation tank 16 through the water supply line 12. Further, the cadmium chloride solution in the constant volume stirring tank 16 is returned to the constant volume stirring tank 16 via the bottom outlet 161 and the second pump 171 for the pH value lower/higher and the specific gravity lower/higher (both of these cases are not acceptable) of the sampling detection. Until the pH value and specific gravity sampled and detected by the second sampling line 173 pass, the cadmium chloride solution in the constant volume stirring tank 16 is supplied to the cadmium chloride crystal hydrate mixing unit 2 via the second pump 171 and the second filter 172.
The constant volume stirring tank 16 is also provided with a tail gas air pipe 162; the tail gas air pipe 162 is used for setting a micro negative pressure to prevent the tail gas in the constant volume stirring tank 16 from overflowing. The value of the micro negative pressure is only required to prevent the tail gas in the stirring tank 16 from overflowing.
Referring to fig. 1, in one embodiment, a cadmium chloride crystal hydrate mixing section 2 includes a mixing and agitation tank 21, a crystal hydrate supply line 22, and a weighing mechanism 23. The mixing and stirring tank 21 comprises a tank body 211, and the tank body 211 is in controlled communication with the cadmium chloride solution preparation part 1 to receive the cadmium chloride solution, namely to receive the qualified cadmium chloride solution of the cadmium chloride solution preparation part 1. The crystal hydrate supply line 22 is used to supply the tank 211 of the mixing and stirring tank 21 with crystal hydrate. The mixing and stirring tank 21 further comprises a stirrer 212, and the stirrer 212 is used for stirring the mixture of the crystal hydrate and the cadmium chloride solution in the tank body 211. The weighing mechanism 23 is located below the tank body 211 of the mixing and stirring tank 21 and supports the tank body 211 of the mixing and stirring tank 21, and the weighing mechanism 23 is used for weighing the tank body 211 of the mixing and stirring tank 21.
Specifically, the tank 211 of the mixing and stirring tank 21 is controlled to be communicated with the second filter outlet 172b of the second filter 172 of the second detection module 17 of the cadmium chloride solution preparation unit 1, and after the sample detection is passed through the second sampling line 173 of the second detection module 17, the passed cadmium chloride solution is pumped by the second pump 171 and filtered by the second filter 172 to be supplied to the tank 211 of the mixing and stirring tank 21.
In this embodiment, the weighing mechanism 23 displays and weighs in real time and interlocks (i.e., communicatively couples) the crystalline hydrate supply line 22, and automatically stops the crystalline hydrate supply line 22 from conveying crystalline hydrate after the weight is reached.
In one example, the crystalline hydrate is potassium chloride, but is not limited thereto, and any suitable crystalline hydrate may be employed as desired.
Referring to fig. 1, in an embodiment, similar to the cadmium oxide supply line 13 of the cadmium chloride solution formulation part 1, the crystalline hydrate supply line 22 includes a screw conveyor 221, and the screw conveyor 221 is used to supply a quantitative amount of crystalline hydrate powder to the mixing and stirring tank 21.
Referring to fig. 1, in an embodiment, similar to the cadmium chloride solution preparing part 1, the cadmium chloride crystal hydrate mixing part 2 further includes a third detection module 24 and a finished product constant volume tank 25.
The third detection module 24 includes a third pump 241, a third filter 242, and a third sampling line 243. The third pump inlet 241a of the third pump 241 is controlled to be communicated with the lower outlet 211a of the tank body 211 of the mixing and stirring tank 21; the third filter inlet 242a of the third filter 242 is in controlled communication with the third pump outlet 241b of the third pump 241; the third sampling line 243 is controlled to be communicated with the third filter outlet 242b of the third filter 242, the third sampling line 243 is used for sampling and detecting the cadmium chloride mixed crystal hydrate solution in the mixing and stirring tank 21 through the communicated third filter 242, the third pump 241 and the mixing and stirring tank 21 so as to determine whether the crystal hydrate content in the cadmium chloride mixed crystal hydrate solution in the mixing and stirring tank 21 meets the requirement; the third filter outlet 242b of the third filter 242 is also in controlled communication with the mixing and stirring tank 21, so that the cadmium chloride mixed crystal hydrate solution discharged from the lower outlet 211a of the tank body 211 of the mixing and stirring tank 21 is pumped back to the mixing and stirring tank 21 after the sampling detection of the cadmium chloride mixed crystal hydrate solution by the third sampling line 243 is unqualified; the finished product constant volume tank 25 is in controlled communication with the third filter outlet 242b of the third filter 242 to receive the qualified cadmium chloride mixed crystal hydrate solution from the mixing and stirring tank 21.
Likewise, to resist corrosion, in one example, the third pump 241 is a perfluorinated pump.
Similarly, whether the content of the crystal hydrate in the cadmium chloride mixed crystal hydrate solution meets the requirement or not is subject to the specified content range. If the crystalline hydrate content is below the specified content range, increasing the amount of crystalline hydrate required through crystalline hydrate feed line 22; if the crystal hydrate content is higher than the predetermined content range, the amount of the qualified cadmium chloride solution supplied is increased by the pumping of the second pump 171 of the cadmium chloride solution preparing section 1.
Referring to fig. 1, in one embodiment, the cadmium chloride crystal hydrate mixing section 2 further includes a fourth detection module 26, similar to the second detection module 17 of the cadmium chloride solution formulation section 1.
The fourth detection module 26 includes a fourth pump 261, a fourth filter 262, and a fourth sampling line 263. A fourth pump inlet 261a of the fourth pump 261 is controlled to communicate with the lower discharge 251 of the finished product constant volume tank 25. The fourth filter inlet 262a of the fourth filter 262 is in controlled communication with the fourth pump outlet 261b of the fourth pump 261. The fourth sampling line 263 is controlled to be communicated with a fourth filter outlet 262b of the fourth filter 262, and the fourth sampling line 263 is used for sampling and detecting the cadmium chloride mixed crystal hydrate solution in the finished product constant volume tank 25 through the communicated fourth filter 262, the fourth pump 261 and the finished product constant volume tank 25 to determine whether the content of the crystal hydrate in the cadmium chloride mixed crystal hydrate solution in the finished product constant volume tank 25 meets the requirement. The fourth filter outlet 262b of the fourth filter 262 is also in controlled communication with the finished product constant volume tank 25, so that the cadmium chloride mixed crystal hydrate solution in the finished product constant volume tank 25 is pumped back to the finished product constant volume tank 25 after sampling detection via the fourth sampling line 263 is unqualified. The fourth filter outlet 262b of the fourth filter 262 is also in controlled communication with the tank 211 of the mixing and stirring tank 21, so as to return the cadmium chloride mixed crystal hydrate solution in the finished product constant volume tank 25 to the tank 211 of the mixing and stirring tank 21 after the sampling detection is unqualified through the fourth sampling line 263.
Likewise, to resist corrosion, in one example, the fourth pump 261 is a perfluorinated pump.
Similarly, when the cadmium chloride mixed crystal hydrate solution in the finished product constant volume tank 25 is returned to the tank body 211 of the mixing and stirring tank 21 after the sampling detection is failed through the fourth sampling line 263, the crystal hydrate supplied through the crystal hydrate supply line 22 and the qualified cadmium chloride solution pumped by the second pump 171 of the cadmium chloride solution preparing unit 1 are adjusted as described above until the cadmium chloride mixed crystal hydrate solution in the finished product constant volume tank 25 is supplied to the filling unit 3 after the sampling detection is passed through the fourth sampling line 263.
Referring to fig. 1, in one embodiment, the cadmium chloride crystal hydrate mixing section 2 further comprises a zone tail gas draft horn 27. The regional exhaust air draft horn 27 is arranged above the mixing and stirring tank 21 and is used for sucking the exhaust air or the dust around the mixing and stirring tank 21. Wherein, the tail gas around the mixing and stirring tank 21 comes from the tail gas that overflows from the mixing and stirring tank 21 through the interface (for example, the opening and closing of the interface for putting in the crystal hydrate through the crystal hydrate supply line 2), so the environment of the cadmium chloride mixed crystal hydrate solution production workshop is ensured to be healthy to the operators, and meanwhile, the influence on the preparation of the cadmium chloride mixed crystal hydrate solution in the mixing and stirring tank 21 caused by the direct suction of the interfaces by the regional tail gas exhaust horns 27 is also avoided. Dust comes from the crystalline hydrate feed line 2.
Referring to fig. 1, in one example, the finished product filling section 3 includes a finished product filling drum 31 and a scale 32. The finished product filling barrel 31 is controlled to be communicated with a fourth filter outlet of the fourth filter 262 so as to receive and pack the qualified cadmium chloride mixed crystal hydrate solution; the scale 32 is used to weigh the finished product filling drum 31.
The scale 32 may be an electronic scale, the accuracy of which may be determined by selecting the appropriate type.
Referring to fig. 1, the cadmium chloride solution preparation unit 1 further includes a PLC control operation station 4, and the PLC control operation station 4 is communicatively connected to the cadmium chloride solution preparation unit 1, the cadmium chloride crystal hydrate mixing unit 2, and the filling unit 3.
Specifically, in the cadmium chloride solution preparation unit 1, the PLC control operation station 4 is communicatively connected to a water supply pump 112, a water supply flow meter 113, a water supply solenoid valve 114, an HCl supply pump 123, an HCl supply flow meter 124, an HCl supply solenoid valve 125, a screw conveyor 131, an agitation device 144, an integrated temperature transmitter 145, a first pump 151, a first filter 152, a second pump 171, and a second filter 172; for the cadmium chloride crystal hydrate mixing part, the PLC control operation station 4 is in communication connection with the stirrer 212, the screw conveyor 221, the weighing mechanism 23, the third pump 241, the third filter 242, the fourth pump 261, the fourth filter 262 and the regional tail gas exhaust horn 27; for the filling section, the PLC controls the operation station 4 to be communicatively connected to the scale 32.
Through the communication connection of the PLC control operation station 4, the preparation precision of the cadmium chloride mixed crystal hydrate solution is realized, and particularly, the first detection module 15, the second detection module 17, the third detection module 24 and the fourth detection module 25 are adopted, so that the preparation precision and the quality stability are ensured.
It is noted that in this context, the "controlled communication" is performed through respective valves, which can be connected in communication with the PLC control operator station 4, in order to increase the degree of automation of the production.
The above detailed description is used to describe exemplary embodiments, but is not intended to limit the combinations explicitly disclosed herein. Thus, unless otherwise specified, various features disclosed herein can be combined together to form a number of additional combinations that are not shown for the sake of brevity.
Claims (10)
1. A cadmium chloride mixed crystal hydrate solution production system (100) is characterized by comprising a cadmium chloride solution preparation part (1), a cadmium chloride mixed crystal hydrate part (2) and a filling part (3);
the cadmium chloride solution preparation part (1) is used for directly preparing a cadmium chloride solution by adopting water, HCl and cadmium oxide together in situ;
the cadmium chloride crystal hydrate mixing part (2) is used for mixing the crystal hydrate with the cadmium chloride solution prepared by the cadmium chloride solution preparation part (1) to form a cadmium chloride mixed crystal hydrate solution;
the filling part (3) is used for filling the cadmium chloride mixed crystal hydrate solution formed by the cadmium chloride mixed crystal hydrate mixing part (2).
2. The cadmium chloride mixed crystal hydrate solution producing system (100) of claim 1,
the cadmium chloride solution preparation part (1) comprises a water supply line (11), an HCl supply line (12), a cadmium oxide supply line (13) and a reaction kettle (14),
the water supply line (11) is used for supplying water to the reaction kettle (14);
the HCl supply line (12) is used for supplying an HCl solution into the reaction kettle (14);
a cadmium oxide supply line (13) for supplying cadmium oxide into the reaction kettle (14);
the reaction vessel (14) is used for reacting the cadmium oxide and HCl fed therein to form cadmium chloride and the formed cadmium chloride and water to form a cadmium chloride solution.
3. The cadmium chloride mixed crystal hydrate solution producing system (100) of claim 2,
the water supply line (11) includes a water supply pipe (111), a water supply pump (112), a water supply flow meter (113), and a water supply solenoid valve (114),
a water supply pipe (111) connected between the water supply pump (112) and the reaction kettle (14);
a water supply pump (112) for pumping external water to the reaction kettle (14) through a water supply pipeline (111);
a water supply flow meter (113) is provided in the water supply line (111), the water supply flow meter (113) being configured to measure the flow rate of water in the water supply line (111);
a water supply solenoid valve (114) is provided in the water supply line (111), and the water supply solenoid valve (114) is used to adjust the flow rate of water in the water supply line (111).
4. The cadmium chloride mixed crystal hydrate solution production system (100) of claim 2,
the HCl supply line (12) includes an HCl storage tank (121), an HCl supply line (122), an HCl supply pump (123), an HCl supply flow meter (124), and an HCl supply solenoid valve (125),
the HCl storage tank (121) stores HCl solution;
an HCl supply line (122) is connected between an HCl storage tank (121) and the reaction kettle (14);
an HCl supply pump (123) is arranged on the HCl supply pipeline (122), and the HCl supply pump (123) is used for pumping the HCl solution in the HCl storage tank (121) to the reaction kettle (14) through the HCl supply pipeline (122);
an HCl supply flow meter (124) is arranged on the HCl supply pipeline (122), and the HCl supply flow meter (124) is used for measuring the flow rate of the HCl solution in the HCl supply pipeline (122);
an HCl supply solenoid valve (125) is provided in the HCl supply line (122), and the HCl supply solenoid valve (125) adjusts the flow rate of the HCl solution in the HCl supply line (122).
5. The cadmium chloride mixed crystal hydrate solution producing system (100) of claim 2,
the reaction kettle (14) comprises a kettle body (141), and the kettle body (141) is communicated with a water supply line (11), an HCl supply line (12) and a cadmium oxide supply line (13).
6. The cadmium chloride mixed crystal hydrate solution producing system (100) of claim 2,
the cadmium chloride solution preparation part (1) also comprises a first detection module (15) and a constant volume stirring tank (16);
the first detection module (15) comprises a first pump (151), a first filter (152) and a first sampling line (153),
a first pump inlet (151a) of the first pump (151) is controlled to be communicated with a bottom outlet (146) of the reaction kettle (14), and a first pump outlet (151b) of the first pump (151) is controlled to be communicated with the reaction kettle (14);
the first filter inlet (152a) of the first filter (152) is in controlled communication with the first pump outlet (151b) of the first pump (151);
a first sampling line (153) is in controlled communication with a first filter outlet (152b) of the first filter (152), and the first sampling line (153) is used for sampling and detecting the pH value and specific gravity of the cadmium chloride solution formed in the reaction kettle (14) through the first filter (152), the first pump (151) and the reaction kettle (14) which are communicated;
the constant-volume stirring tank (16) is in controlled communication with a first filter outlet (152b) of the first filter (152).
7. The cadmium chloride mixed crystal hydrate solution producing system (100) of claim 5,
the constant-volume stirring tank (16) is also communicated with the water supply line (11) in a controlled manner and is used for supplying water into the constant-volume stirring tank (16);
the constant-volume stirring tank (16) is also communicated with an HCl supply line (12) in a controlled manner and is used for supplying an HCl solution into the constant-volume stirring tank (16);
the cadmium chloride solution preparation part (1) also comprises a second detection module (17),
the second detection module (17) comprises a second pump (171), a second filter (172) and a second sampling line (173),
a second pump inlet (171a) of the second pump (171) is controlled to be communicated with a bottom outlet (161) of the constant volume stirring tank (16);
a second filter inlet (172a) of the second filter (172) is in controlled communication with a second pump outlet (171b) of the second pump (171);
the second sampling line (173) is in controlled communication with a second filter outlet (172b) of the second filter (172), and the second sampling line (173) is used for sampling and detecting the pH value and the specific gravity of the cadmium chloride solution in the constant volume stirring tank (16) through the second filter (172), the second pump (171) and the constant volume stirring tank (16) which are in communication;
the second filter outlet (172b) of the second filter (172) is in controlled communication with the cadmium chloride crystal hydrate mixing section (2).
8. The cadmium chloride mixed crystal hydrate solution producing system (100) of claim 1,
the cadmium chloride crystal hydrate mixing part (2) comprises a mixing and stirring tank (21), a crystal hydrate supply line (22) and a weighing mechanism (23),
the mixing and stirring tank (21) comprises a tank body (211), and the tank body (211) is controlled to be communicated with the cadmium chloride solution preparation part (1) to receive the cadmium chloride solution;
a crystal hydrate supply line (22) for supplying a crystal hydrate to the tank body (211) of the mixing and stirring tank (21);
the mixing and stirring tank (21) also comprises a stirrer (212), and the stirrer (212) is used for stirring the mixture of the crystal hydrate and the cadmium chloride solution in the tank body (211);
the weighing mechanism (23) is positioned below the tank body (211) of the mixing and stirring tank (21) and used for supporting the tank body (211) of the mixing and stirring tank (21), and the weighing mechanism (23) is used for weighing the tank body (211) of the mixing and stirring tank (21).
9. The cadmium chloride mixed crystal hydrate solution producing system (100) of claim 8,
the cadmium chloride crystal hydrate mixing part (2) also comprises a third detection module (24) and a finished product constant volume tank (25);
the third detection module (24) comprises a third pump (241), a third filter (242) and a third sampling line (243),
a third pump inlet (241a) of the third pump (241) is controlled to be communicated with a lower outlet (211a) of the tank body (211) of the mixing and stirring tank (21);
the third filter inlet (242a) of the third filter (242) is controlled to be communicated with the third pump outlet (241b) of the third pump (241);
a third sampling line (243) is in controlled communication with a third filter outlet (242b) of the third filter (242), the third sampling line (243) is used for sampling and detecting the cadmium chloride mixed crystal hydrate solution of the mixed stirring tank (21) through the communicated third filter (242), a third pump (241) and the mixed stirring tank (21) so as to determine whether the crystal hydrate content in the cadmium chloride mixed crystal hydrate solution in the mixed stirring tank (21) meets the requirement;
the third filter outlet (242b) of the third filter (242) is also in controlled communication with the mixing and stirring tank (21) so as to pump the cadmium chloride mixed crystal hydrate solution discharged from the lower outlet (211a) of the tank body (211) of the mixing and stirring tank (21) back to the mixing and stirring tank (21) after sampling detection fails through the third sampling line (243);
the finished product constant volume tank (25) is in controlled communication with a third filter outlet (242b) of the third filter (242) to receive qualified cadmium chloride mixed crystal hydrate solution from the mixing and stirring tank (21).
10. The cadmium chloride mixed crystal hydrate solution producing system (100) of claim 9,
the cadmium chloride crystal hydrate mixing part (2) also comprises a fourth detection module (26);
the fourth detection module (26) comprises a fourth pump (261), a fourth filter (262) and a fourth sampling line (263);
a fourth pump inlet (261a) of the fourth pump (261) is controlled to be communicated with a lower discharge port (251) of the finished product constant volume tank (25);
a fourth filter inlet (262a) of the fourth filter (262) is in controlled communication with a fourth pump outlet (261b) of the fourth pump (261);
a fourth sampling line (263) is in controlled communication with a fourth filter outlet (262b) of the fourth filter (262), and the fourth sampling line (263) is used for sampling and detecting the cadmium chloride mixed crystal hydrate solution in the finished product constant volume tank (25) through the communicated fourth filter (262), a fourth pump (261) and the finished product constant volume tank (25) to determine whether the crystal hydrate content in the cadmium chloride mixed crystal hydrate solution in the finished product constant volume tank (25) meets the requirement;
a fourth filter outlet (262b) of the fourth filter (262) is also in controlled communication with the finished product constant volume tank (25) so as to pump the cadmium chloride mixed crystal hydrate solution of the finished product constant volume tank (25) back to the finished product constant volume tank (25) after sampling detection is unqualified through a fourth sampling line (263);
the fourth filter outlet (262b) of the fourth filter (262) is also in controlled communication with the tank body (211) of the mixing and stirring tank (21) so as to pump the cadmium chloride mixed crystal hydrate solution in the finished product constant volume tank (25) back to the tank body (211) of the mixing and stirring tank (21) after sampling detection is unqualified through the fourth sampling line (263).
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| CN202122946424.5U CN216726987U (en) | 2021-11-26 | 2021-11-26 | Cadmium chloride mixed crystal hydrate solution production system |
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