CN106422994B - Method and equipment for preparing ammonium bicarbonate type extraction liquid - Google Patents
Method and equipment for preparing ammonium bicarbonate type extraction liquid Download PDFInfo
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- CN106422994B CN106422994B CN201610922145.6A CN201610922145A CN106422994B CN 106422994 B CN106422994 B CN 106422994B CN 201610922145 A CN201610922145 A CN 201610922145A CN 106422994 B CN106422994 B CN 106422994B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/008—Feed or outlet control devices
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/26—Carbonates or bicarbonates of ammonium
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/28—Methods of preparing ammonium salts in general
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The invention relates to a method and equipment for preparing a carbon ammonium extraction liquid. The equipment comprises a reaction tank, a circulating pump and CO 2 The device comprises a gas storage tank, an ejector, an absorption coil and a finished product storage tank; the outlet and the inlet of the reaction box are respectively communicated with two ends of a pipeline to form an external circulation loop, and the pipeline is sequentially provided with a circulation pump, an ejector and an absorption coil pipe from the outlet to the inlet; the inlet of the ejector is also connected with CO 2 The gas storage tank is communicated; the outlet of the reaction box is also communicated with the finished product storage box. Ammonia water or ammonia water solution is conveyed into the ejector through the circulating pump from the reaction box and is mixed with the CO 2 CO provided in a gas storage tank 2 After being mixed by the ejector, the mixture is further absorbed and reacted in the absorption coil pipe, then the mixture returns to the reaction box and is circulated, and after the reaction in the reaction box obtains carbon ammonium absorption liquid with proper concentration, the liquid in the reaction box is conveyed to the finished product storage box.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a method and equipment for preparing a carbon ammonium draw solution.
Background
Forward osmosis refers to a process in which two kinds of aqueous solutions with different osmotic pressures are respectively placed on two sides of a forward osmosis membrane, and water molecules penetrate through the forward osmosis membrane from a low osmotic pressure side to a high osmotic pressure side under the driving of osmotic pressure difference. The driving force of the forward osmosis process is the osmotic pressure difference between the feed liquid and the draw liquid, so compared with membrane separation technologies such as reverse osmosis and nanofiltration, the forward osmosis technology has the advantages of low energy consumption, high recovery rate, light membrane pollution and the like, is an environment-friendly technology with great potential, and has the application range in the fields of seawater desalination, sewage purification, food, medicine, energy and the like.
In the last decade, the forward osmosis membrane and the separation technology thereof have been increasingly and internationally regarded as the most promising technology in the water treatment industry and the high-salinity water concentration technology. The forward osmosis membrane and the draw solution are two key factors influencing whether the forward osmosis technology can be successfully applied to the concentration of high-salinity water.
The ideal drawing liquid has higher solubility to ensure higher osmotic pressure, the effective components of the drawing liquid are easy to recover, the energy consumption of the recovery process is lower, the drawing liquid with low cost can be recycled, the drawing liquid has less pollution to the environment and does not chemically react with a membrane, and the drawing liquid used in the current commercialized forward osmosis project is mainly a carbon ammonium drawing liquid. The existing preparation method of the ammonium bicarbonate drawing liquid adopts ammonium bicarbonate and ammonia water, has high requirement on the purity of the ammonium bicarbonate and higher cost, the dissolution of the ammonium bicarbonate is an endothermic reaction, the influence of temperature on the solubility is great, the ammonium bicarbonate is easy to crystallize, and the ammonium bicarbonate is generally poured manually during the preparation, so the labor intensity is high. These factors greatly hinder the production efficiency of the ammonium carbonate-based drawing solution.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The present invention is directed to a method and apparatus for preparing a carbon-based ammonium draw solution to solve the above-mentioned problems.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
the equipment for preparing the ammonium bicarbonate drawing liquid comprises a reaction box, a circulating pump and CO 2 The device comprises a gas storage tank, an ejector, an absorption coil and a finished product storage tank;
the outlet and the inlet of the reaction box are respectively communicated with two ends of a pipeline to form an external circulation loop, and the pipeline is sequentially provided with a circulation pump, an ejector and an absorption coil pipe from the outlet to the inlet;
the inlet of the ejector is also connected with CO 2 The gas storage tanks are communicated;
the outlet of the reaction box is also communicated with the finished product storage box.
The equipment for preparing the ammonium bicarbonate type extracting solution has the advantages of simple structure, convenience in maintenance and easiness in operation.
The circulating pump exports aqueous ammonia or aqueous ammonia solution in with the reaction box by the pipeline, mixes with carbon dioxide gas on the pipeline, makes the absorption reaction more complete via the absorption coil pipe again, returns to in the reaction box again.
The absorption coil can increase ammonia water or ammonia water solution and CO 2 To promote thorough mixing and reaction of the two.
The ejector of the ejector is an ejector for gas-liquid mixing, and preferably, the ejector is a stainless steel ejector or an ejector made of PVDF (polyvinylidene fluoride) materials in order to ensure the strength of the ejector; in order to reduce or prevent the vibration of the ejector when gas and liquid are mixed, it is preferable that the ejector is fixed to the base.
Preferably, in the apparatus for preparing a carbon-containing ammonium extraction solution as described above, the reaction tank is connected to the finished product storage tank by a pump;
further preferably, the reaction tank is connected with the finished product storage tank through the circulating pump.
Will the reaction box through the circulating pump with the finished product bin links to each other can practice thrift a pump, makes the circulating pump obtain more abundant utilization.
Preferably, in the above equipment for preparing the ammonium bicarbonate type intake liquid, the absorption coil is formed by connecting 5 to 10 pipes with the length of 2m to 3m in series;
the absorption coil is formed by connecting 5, 6, 7, 8, 9 or 10 pipes with the length of 2m to 3m in series; the pipes are equal or unequal in length from 2m to 3m.
Further preferably, the tube of the absorption coil is a UPVC tube or a stainless steel tube;
both UPVC pipe and stainless steel pipe have the advantage of corrosion resistance, but stainless steel pipe has higher strength and better heat resistance, and therefore, most preferably, the pipe is stainless steel pipe.
Further preferably, two ends of the absorption coil are further provided with pipelines for short-circuiting the absorption coil.
The absorption coil pipe promotes ammonia water or ammonia water solution and CO 2 One of the main equipments for sufficient mixing and reaction requires regular maintenance, and short-circuiting pipes are provided at both ends thereof for the convenience of maintenance.
Preferably, in the above apparatus for preparing an ammonium carbonate-based draw solution, a heat exchanger is further disposed on the pipeline between the ejector and the absorption coil.
Due to ammonia water or ammonia water solution and CO 2 The reaction of (a) is exothermic, and therefore a heat exchanger is preferably provided for lowering the temperature.
Considering that the heat exchanger may not be needed to work when the temperature is lower in autumn and winter, and considering that the heat exchanger is convenient to overhaul, it is further preferable that pipelines for short-circuiting the heat exchanger are further arranged at two ends of the heat exchanger.
Preferably, the equipment for preparing a carbon ammonium based draw solution as described above, the heat exchanger is a plate heat exchanger or a tubular heat exchanger.
The plate heat exchanger has the advantages of small occupied area, high heat exchange efficiency, energy conservation and simple maintenance; the tubular heat exchanger has the advantages of high strength, larger heat exchange area and the like.
Preferably, in the apparatus for preparing an ammonium carbonate-based draw solution as described above, the pipeline between the outlet of the reaction tank and the heat exchanger is a stainless steel pipeline.
Preferably, in the above apparatus for preparing a carbon-ammonium extraction solution, a weighing module is disposed at the bottom of the reaction tank.
Wherein, in order to guarantee the stability of reaction box, preferably set up reaction box has a plurality of support columns, and the quantity of support column is 2, 3, 4, 5, 6 or more.
Preferably, the weighing module is provided with one or more weighing modules, and the weighing modules are arranged at the bottom of the supporting column.
The weighing module can accurately weigh the mass of ammonia water or ammonia water solution and introduced CO 2 And determining the gas quality so as to determine the proportion of the gas quality and the gas quality to obtain the carbon ammonium extraction liquid with proper concentration.
Preferably, in the above apparatus for preparing a carbon-ammonium extraction solution, an opening for injecting ammonia water or an ammonia water solution is provided at the top of the reaction tank;
preferably, the ammonia water or ammonia water solution is connected with the opening through an ammonia water delivery pump.
The method for preparing the ammonium bicarbonate draw solution by using the equipment comprises the following steps:
ammonia water or ammonia water solution is conveyed into the ejector through the circulating pump from the reaction box and is mixed with the CO 2 CO provided in a gas storage tank 2 After being mixed by the ejector, the mixture is further absorbed and reacted in the absorption coil pipe, then the mixture returns to the reaction box and is circulated, and after the reaction in the reaction box obtains carbon ammonium absorption liquid with proper concentration, the liquid in the reaction box is conveyed to the finished product storage box.
The concentration of the prepared drawing liquid can be regulated and controlled at any time, and the drawing liquid is clean and free of impurities.
Preferably, in the raw materials used in the invention, the ammonia water solution is prepared by adding reverse osmosis pure water into 23-25% industrial grade ammonia water, and the final ammonia water or ammonia water solution has a concentration of 6.9-11.5 mol/L; preferably, the CO is 2 Is industrial grade CO with the purity of more than 99.5 percent 2 A gas.
The main components of the carbon-ammonium draw solution prepared by the device are ammonium carbonate, ammonium bicarbonate, ammonium carbamate and other carbon-ammonium ion mixed solution;
preferably, the concentration of the finally prepared ammonium bicarbonate draw solution is 2-5 mol/L, and more preferably 2.8-3.5 mol/L;
preferably, the ratio of nitrogen element to carbon element in the finally prepared ammonium carbonate extracting solution is N: c =1.5 to 2.8, preferably 1.8 to 2.5.
Preferably, the method, the aqueous ammonia or aqueous ammonia solution and the CO are as described above 2 The gas is subjected to cooling treatment after being mixed by the ejector and before entering the absorption coil pipe for absorption, and the temperature of the mixed liquid before entering the absorption coil pipe cannot exceed 50 ℃; more preferably, the temperature of the mixed liquor before entering the absorption coil cannot exceed 45 ℃.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of an apparatus for preparing a carbonaceous ammonium extraction solution according to the present invention.
Reference numerals are as follows:
an ammonia water delivery pump 1;
a reaction box 2;
CO 2 a gas storage tank 3;
a circulation pump 4;
an ejector 5;
an absorption coil 7;
a heat exchanger 8;
and (5) finished product storage boxes 9.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are conventional products which are not indicated by manufacturers and are commercially available.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the apparatus for preparing a carbon-ammonium extraction solution according to the present invention includes a reaction chamber 2; CO 2 2 A gas storage tank 3; a circulation pump 4; an ejector 5; an absorption coil 7 and a finished product storage tank 9;
an outlet and an inlet of the reaction box 2 are respectively communicated with two ends of a pipeline to form an external circulation loop, and the pipeline is sequentially provided with a circulation pump 4, an ejector 5 and an absorption coil 7 from the outlet to the inlet;
the ejector 5 is a tee joint and is also connected with CO 2 The gas storage tank 3 is communicated;
the outlet of the reaction box 2 is also communicated with the finished product storage box 9.
When the equipment is in operation, the circulating pump 4 outputs the ammonia water or ammonia water solution in the reaction tank 2 through the pipeline, and the ammonia water or ammonia water solution is connected with CO on the pipeline ejector 5 2 CO from gas tank 3 2 Mixing, leading the absorption reaction to be more complete through the absorption coil 7, and then returning the reaction product into the reaction box 2; the reaction is carried out along with ammonia water or ammonia water solution and CO 2 The operation in the pipeline is performed circularly, and after the reaction in the reaction tank 2 obtains the ammonium bicarbonate extraction liquid with proper concentration, the liquid in the reaction tank 2 can be conveyed into the finished product storage tank 9.
Preferably, the top of the reaction box 2 is provided with an opening for injecting ammonia water or an ammonia water solution; more preferably, the ammonia water or ammonia water solution is connected with the opening through an ammonia water delivery pump 1; more preferably, as shown in fig. 1, a pressure gauge and an on-off valve are further provided in series near the ammonia water feed pump 1.
In the reaction raw materials used in the method, the ammonia water solution is preferably prepared by adding reverse osmosis pure water into industrial-grade ammonia water with the concentration of 23-25%, and the final ammonia water or ammonia water solution has the concentration of 6.9-11.5 mol/L; the CO is 2 The purity of the industrial grade CO is preferably more than 99.5% 2 A gas.
In order to ensure the strength of the ejector 5, preferably, the ejector 5 is a stainless steel ejector or an ejector made of PVDF.
In order to reduce or prevent the vibration of the ejector when the gas and the liquid are mixed, it is preferable that the ejector 5 is fixed to the base.
Preferably, in one embodiment of the present invention, the CO is 2 A pressure reducing valve is also arranged on the pipeline connecting section between the gas storage tank 3 and the ejector 5; more preferably, a gas flow meter is further arranged on the pipeline connecting section between the pressure reducing valve and the ejector 5; the operator can more conveniently control and/or monitor the CO through the pressure reducing valve and/or the gas flow meter 2 The pressure of the gas.
The absorption coil 7 can increase ammonia water or ammonia water solution and CO 2 To promote thorough mixing and reaction of the two; in order that the absorption coil 7 has a better absorption effect, preferably, the absorption coil is formed by connecting 5, 6, 7, 8, 9 or 10 pipes with the length of 2m to 3m in series; further preferably, the pipes are pipes with equal or unequal lengths from 2m to 3m.
In order to make the absorption coil 7 have better corrosion resistance, the tube of the absorption coil is preferably a UPVC tube or a stainless steel tube; in order to make the absorption coil 7 have better heat resistance and strength at the same time, it is more preferable that the tube of the absorption coil is a stainless steel tube.
The absorption coil 7 promotes ammonia water or ammonia water solution and CO 2 One of the main devices for thorough mixing and reaction requires periodic maintenance in order to maintain itConveniently, as shown in fig. 1, preferably, in an embodiment of the present invention, two ends of the absorption coil 7 are further provided with a pipe for short-circuiting the absorption coil 7; more preferably, the short-circuit pipeline is also provided with a switch valve for controlling the switch of the short-circuit pipeline; more preferably, in order to better realize the short-circuit effect, a check valve is further arranged in series at the inlet of the absorption coil 7 near the reaction tank 2, a switch valve is further arranged in series at the outlet of the absorption coil 7 near the reaction tank 2, and the check valve and the switch valve can be short-circuited together with the absorption coil 7. Wherein the purpose of the check valve is that when the absorption coil 7 is short-circuited, the solution does not flow back to the absorption coil 7.
Preferably, the ammonia or ammonia solution and the CO 2 The gas is subjected to temperature reduction treatment after being mixed by the ejector and before entering the absorption coil for absorption, and the temperature of the mixed liquid before entering the absorption coil cannot exceed 50 ℃; more preferably, the temperature of the mixed liquor before entering the absorption coil cannot exceed 45 ℃.
Due to ammonia water or ammonia water solution and CO 2 Is an exothermic reaction, and CO 2 Since the solubility of (b) is decreased due to the increase of the temperature, thereby affecting the reaction efficiency, it is preferable that a heat exchanger 8 is further provided on the pipe between the ejector 5 and the absorption coil 7 in one embodiment of the present invention.
Considering that the heat exchanger may not be needed to work when the temperature is low in autumn and winter and considering that the heat exchanger is convenient to overhaul, preferably, pipelines for short-circuiting the heat exchanger are further arranged at two ends of the heat exchanger; more preferably, the short-circuit pipeline is also provided with a switch valve for controlling the switch of the short-circuit pipeline; more preferably, in order to achieve the short-circuit effect better, a check valve is further connected in series at the inlet of the heat exchanger 8 close to the reaction tank 2, a switch valve is further connected in series at the outlet of the heat exchanger 8 close to the reaction tank 2, and the check valve and the switch valve can be short-circuited together with the heat exchanger 8. Wherein the purpose of the check valve is that when the heat exchanger 8 is short-circuited, the solution does not flow back to the heat exchanger 8.
Preferably, if the temperature of the mixed liquid before entering the absorption coil is higher than 50 ℃, the short circuit of the heat exchanger 8 is closed, so that the temperature of the mixed liquid is reduced through the heat exchanger 8 before entering the absorption coil. More preferably, as shown in fig. 1, in order to better monitor the temperature of the mixed liquid, a temperature transmitter is further arranged in series at the inlet of the heat exchanger 8 near the reaction tank 2; meanwhile, in order to monitor the temperature of the mixed liquid in the pipeline no matter whether the heat exchanger 8 is in short circuit or not, preferably, another temperature transmitter is arranged before the position of the short circuit pipeline of the ejector 5 and the heat exchanger 8.
Preferably, the heat exchanger is a plate heat exchanger or a tube heat exchanger.
Due to ammonia water or ammonia water solution and CO 2 The reaction of (2) is exothermic, and when the ambient temperature is high and the reaction is severe, the temperature of the pipeline between the outlet of the reaction box 2 and the heat exchanger 8 is often relatively high, so in order to ensure the use safety and stability of the device, the pipeline of the section is preferably made of stainless steel.
Preferably, the bottom of the reaction box 2 is provided with a weighing module.
The weighing module can accurately weigh the mass of ammonia water or ammonia water solution and introduced CO 2 And determining the gas quality so as to determine the proportion of the two to obtain the ammonium carbonate extracting solution with proper concentration.
The main components of the carbon ammonium extraction liquid prepared by the device are ammonium carbonate, ammonium bicarbonate, ammonium carbamate and other carbon ammonium ion mixed solutions; preferably, the concentration of the finally prepared ammonium bicarbonate draw solution is 2-5 mol/L, and more preferably 2.8-3.5 mol/L; preferably, the ratio of nitrogen element to carbon element in the finally prepared ammonium carbonate extracting solution is N: c =1.5 to 2.8, preferably 1.8 to 2.5.
In order to ensure the stability of the reaction box 2, it is preferable to arrange the reaction box to have a plurality of support columns, the number of the support columns being 2, 3, 4, 5, 6 or more. More preferably, the weighing module is provided with one or more weighing modules and is arranged at the bottom of the supporting column.
When the reaction is carried out for a period of time and the concentration of the ammonium carbonate extracting solution is appropriate, the reactant in the reaction tank 2 can be discharged into the finished product storage tank 9.
Preferably, in one embodiment of the present invention, said reaction tank 2 is connected to said product storage tank 9 by means of a pump; in order to make the circulation pump more fully utilized, it is more preferable that the reaction tank 2 is connected to the product storage tank 9 through the circulation pump 4.
Preferably, in one embodiment of the invention, the number of finished storage bins 9 may be 1, 2, 3, 4, 5, 6 or more.
Preferably, in order to better control the opening and closing of the finished product storage tank 9, as shown in fig. 1, a switching valve is further disposed on a direct pipeline between the reaction tank 2 and the finished product storage tank 9; more preferably, the on-off valve is provided in series with the product storage tank 9 on a branch of the main pipe in order that the on-off valve does not interfere with the reaction in the main pipe.
Preferably, in order to better judge whether the reaction is complete, a branch for sampling is further provided in the pipeline, and an on-off valve is also provided on the branch to control the on-off of the branch for sampling.
Preferably, as shown in fig. 1, in order to monitor the pressure at the outlet and the pipeline of the circulation pump 4 and prevent the liquid pressure when the ammonia water or the ammonia water solution in the reaction tank 2 is output through the circulation pump 4 and enters the ejector 5 from being too high or too low, a pressure gauge is further disposed on the pipeline between the circulation pump 4 and the ejector 5.
In order to observe the conditions in the pipeline conveniently, the ammonia water or the ammonia water solution and CO are observed visually 2 Whether or not mixing is complete, as shown in fig. 1, it is preferred that in one embodiment of the present invention, windows 6 are provided in the vicinity of the ejector 5, the absorption coil 7, and the heat exchanger 8, respectively.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The method for preparing the ammonium carbonate drawing liquid by using the equipment for preparing the ammonium carbonate drawing liquid is characterized by comprising the following steps of:
ammonia water is conveyed into the ejector from the reaction box through the circulating pump and is mixed with CO 2 CO provided in a gas storage tank 2 After being mixed by the ejector, the mixture is further absorbed and reacted in the absorption coil pipe, then the mixture returns to the reaction box and is circulated, and after the reaction in the reaction box obtains carbon ammonium absorption liquid with proper concentration, the liquid in the reaction box is conveyed to a finished product storage box;
the ammonia water and the CO 2 The gas is subjected to temperature reduction treatment after being mixed by the ejector and before entering the absorption coil for absorption, and the temperature of the mixed liquid before entering the absorption coil cannot exceed 50 ℃;
the equipment comprises a reaction tank, a circulating pump and CO 2 The device comprises a gas storage tank, an ejector, an absorption coil and a finished product storage tank;
an outlet and an inlet of the reaction box are respectively communicated with two ends of a pipeline to form an external circulation loop, and the pipeline is sequentially provided with a circulation pump, an ejector and an absorption coil pipe in the direction from the outlet to the inlet;
the inlet of the ejector is also connected with CO 2 The gas storage tanks are communicated;
the outlet of the reaction box is also communicated with the finished product storage box;
a weighing module is arranged at the bottom of the reaction tank;
the absorption coil is formed by serially connecting 5 to 10 pipes with the length of 2m to 3m;
and a heat exchanger is also arranged on a pipeline between the ejector and the absorption coil.
2. The method of claim 1, wherein the reaction tank is connected to the product storage tank by a pump.
3. The method of claim 2 wherein said reaction tank is connected to said product storage tank by said circulation pump.
4. The method of claim 1, wherein the tubing of the absorption coil is UPVC tubing or stainless steel tubing.
5. The method of claim 1, wherein the ends of the absorption coil are further provided with tubing for short circuiting the absorption coil.
6. The method of claim 1, wherein the heat exchanger is further provided with a pipe at both ends thereof for short-circuiting the heat exchanger.
7. The method of claim 1, wherein the heat exchanger is a plate heat exchanger or a tube heat exchanger.
8. The method of claim 1, wherein the conduit between the outlet of the reaction tank and the heat exchanger is a stainless steel conduit.
9. The method according to claim 1, characterized in that the top of the reaction tank is provided with an opening for injecting ammonia.
10. The method of claim 9, wherein the ammonia is connected to the opening by an ammonia transfer pump.
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| CN201610922145.6A CN106422994B (en) | 2016-10-21 | 2016-10-21 | Method and equipment for preparing ammonium bicarbonate type extraction liquid |
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| CN201610922145.6A CN106422994B (en) | 2016-10-21 | 2016-10-21 | Method and equipment for preparing ammonium bicarbonate type extraction liquid |
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| CN107389589A (en) * | 2017-08-03 | 2017-11-24 | 国网安徽省电力公司电力科学研究院 | Detection absorption plant for sulfur hexafluoride gas |
| CN115536090B (en) * | 2022-10-09 | 2024-04-12 | 深圳天华机器设备股份有限公司 | Film-removing liquid medicine recovery device |
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