CN216808264U - By using CO2System for regulating and controlling pH of effluent of chemical crystallization granulation fluidized bed - Google Patents
By using CO2System for regulating and controlling pH of effluent of chemical crystallization granulation fluidized bed Download PDFInfo
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- CN216808264U CN216808264U CN202123203346.6U CN202123203346U CN216808264U CN 216808264 U CN216808264 U CN 216808264U CN 202123203346 U CN202123203346 U CN 202123203346U CN 216808264 U CN216808264 U CN 216808264U
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Abstract
The utility model discloses a method for utilizing CO2The system for regulating and controlling the pH value of the effluent of the chemical crystallization granulation fluidized bed comprises a chemical crystallization granulation fluidized bed unit and CO2Addition unit, CO2A pressurizing and dissolving unit and a carbonic acid adding unit; CO 22The other end of the gas transmission pipe and CO2The air inlet pipes in the pressurizing and dissolving units are communicated; the dissolution water inlet pipe is communicated with a fluidized bed water inlet pipe, and the dissolution water outlet pipe is communicated with a feed inlet of an ejector in the carbonic acid adding unit; jet flowA tubular static mixer is arranged on a water outlet pipe of the fluidized bed at the downstream of the mixer. Compared with the existing method for adjusting the pH value of the effluent of the fluidized bed by adding the inorganic acid, the system has the advantages of stable adjusting effect, high safety, no addition of anions having additional influence on the environment, capability of achieving the purpose of saving carbon and reducing emission, simple operation and convenience for use of a user, and is provided with an automatic control unit.
Description
Technical Field
The utility model belongs to the field of water treatment, relates to a chemical crystallization granulation fluidized bed, and particularly relates to a method for utilizing CO2A system for regulating and controlling the pH value of the effluent of the chemical crystallization granulation fluidized bed.
Background
Climate change has become one of the most popular topics worldwide. How to effectively control carbon emission reduction is the core of the response. Most of the carbon dioxide gas is derived from the combustion of fossil fuel, and at present, much CO exists in the industry2If it is possible to collect the CO2The carbon is collected and utilized, so that the purposes of saving carbon, reducing emission and realizing green sustainable development can be achieved.
As energy consumption increased, 2018 world energy related carbon dioxide (CO)2) The emission increases to 33.1Gt, which increases 1.7% in proportion. Coal-fired power generation accounts for all energy-related CO230% of the discharge amount. China has become the largest energy consuming country and CO in the world2And (4) a discharge country. In contrast, CO is worldwide2The total utilization of (A) is only 1-2 Gt. Large amount of CO2The emission of gases into the atmosphere has a great impact on the atmospheric environment, among the "greenhouse gases" that contribute to global warming, CO2Is the most predominant component.
The field of water treatment is CO2The potential market of application, many industrial enterprises are large water consumers, the amount of alkaline wastewater is large, the utilization rate of water is improved for saving water resources, the pollution of alkaline sewage to the environment is reduced, and the alkaline sewage needs to be treatedAnd (5) treating. At present, the pH value of the alkaline sewage is mainly reduced by adding inorganic acid for regulation, the safety is low, the environmental protection requirement cannot be met, the cost is high, and CO is2Dissolved in water to form a carbonic acid solution, which is an environmentally friendly acidulant, and can be considered to utilize CO2So as to reduce the pH value of the alkaline sewage.
Hardness in water is generally classified into temporary hardness and permanent hardness, and the temporary hardness is made of Ca (HCO) in water3)2And Mg (HCO)3)2The permanent hardness is generally Ca-containing2+And Mg2+Chloride and sulfate salts of (a). Ca in water2+、Mg2+Higher levels cause increased water hardness and thus cause a number of problems. When the hardness of industrial water is higher, scaling phenomenon can occur on the inner wall of a pipeline and the wall of equipment in the using process, so that the cross section area of the pipeline and the equipment is reduced, the flow of a system is reduced, and even equipment blockage phenomenon can occur in serious cases, thereby causing serious consequences to industrial production.
The domestic existing high-hardness water body treatment process comprises a Chinese patent 'a chemical crystallization circulating granulation fluidized bed water treatment device' (patent number: ZL201510864696.7) granted by an applicant, wherein the chemical crystallization principle is utilized, and Ca in water is promoted under the action of a softening agent through the induction action of crystal seeds2+And Mg2+Form crystal and attach on the surface of the seed crystal to form crystal particles so as to achieve the purpose of softening. The softener used in the device at present mainly comprises alkaline agents including NaOH and Na2CO3. Wherein, for the water body with higher temporary hardness, the softening effect can be achieved by directly using NaOH, but for the water body with higher permanent hardness, NaOH-Na is required to be used2CO3The softening requirement can be met by a combined feeding mode. Because all softening agents used are alkaline agents, water treated by the chemical crystallization circulating granulation fluidized bed water treatment device is in an alkaline state, and the pH value of the water needs to be adjusted by adding acid. Hydrochloric acid (HCl) and sulfuric acid (H) are currently commonly used2SO4) To perform neutralization treatment, the strong acid is used in the processThe corrosion to a pipeline system can be caused, and meanwhile, the potential safety hazard is large during the operation of the system, so that strict process management is difficult to perform in practical application. In addition, the production process of the inorganic acid consumes a large amount of natural resources, and the use of a large amount of the inorganic acid is not beneficial to environmental protection.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide a method for utilizing CO2A system for regulating and controlling the pH value of effluent of a chemical crystallization granulation fluidized bed solves the technical problems of insufficient safety and environmental protection of a system for adding other acids in the prior art.
In order to solve the technical problems, the utility model adopts the following technical scheme:
by using CO2The system for regulating and controlling the pH value of the effluent of the chemical crystallization granulation fluidized bed comprises a chemical crystallization granulation fluidized bed unit, wherein the chemical crystallization granulation fluidized bed unit comprises a chemical crystallization granulation fluidized bed main body, a fluidized bed water inlet pipe is arranged at the bottom of the chemical crystallization granulation fluidized bed main body, and a fluidized bed water outlet pipe is arranged at the top of the chemical crystallization granulation fluidized bed main body;
and further comprises CO2Addition unit, CO2A pressurizing and dissolving unit and a carbonic acid adding unit;
said CO2The adding unit comprises CO2Gas cylinder, CO2CO is communicated with the gas storage cylinder2One end of the gas transmission pipe, CO2The other end of the gas transmission pipe and CO2The air inlet pipes in the pressurizing and dissolving units are communicated;
said CO2The pressurizing and dissolving unit comprises a pressure tank, and a stirring paddle is arranged in the pressure tank and driven by a stirring motor; a dissolving water inlet pipe is arranged at the lower part of the pressure tank and is communicated with a fluidized bed water inlet pipe, a dissolving water outlet pipe is arranged at the upper part of the pressure tank and is communicated with a feed inlet of a jet aerator in a carbonic acid adding unit, an air inlet pipe is arranged at the lower part in the pressure tank and is provided with a plurality of aeration heads;
the carbonic acid adding unit comprises an ejector, the ejector and a first flow regulating valve are connected in series and then connected in parallel on a fluidized bed water outlet pipe, a second flow regulating valve is arranged on the fluidized bed water outlet pipe connected in parallel with the ejector, and a tubular static mixer is arranged on the fluidized bed water outlet pipe at the downstream of the ejector.
The utility model also has the following technical characteristics:
the water inlet pipe of the fluidized bed takes water from the raw water storage tank through a water inlet pump; and a medicine adding port at the bottom of the chemical crystallization granulation fluidized bed main body is used for taking medicine from the alkali liquor storage tank through a medicine adding pump.
Said CO2An electric heating type pressure reducing valve is arranged on an air outlet at the top of the gas storage cylinder; CO 22The gas pipe is provided with a gas valve.
The top of overhead tank be equipped with manometer and relief valve, the inner wall of overhead tank is equipped with the guide plate, the bottom of overhead tank is equipped with the drain.
The pressure tank is a cylindrical sealed tank body, and the ratio of the height to the diameter of the tank body is 3: 1.
An inner return pipe is arranged outside the pressure tank; the inner return pipe is provided with an inner return pump and a first gate valve.
And a second gate valve is arranged on the dissolution water inlet pipe.
The aeration heads are arranged in a cross shape, the distance between every two adjacent aeration heads is 15cm, and the number of the aeration heads is 5.
The fluidized bed inlet pipe is provided with a water inlet flowmeter, and the CO is2The gas pipe is provided with a gas flowmeter, and the dissolving water inlet pipe is provided with a liquid flowmeter; the fluidized bed water outlet pipe at the upper part of the ejector is provided with a first pH on-line detector, and the fluidized bed water outlet pipe at the lower part of the tubular static mixer is provided with a second pH on-line detector.
Compared with the prior art, the utility model has the following technical effects:
compared with the existing method of adding inorganic acid to adjust the pH value of the effluent of the fluidized bed, the system has the advantages of stable adjusting effect, high safety, no addition of anions having additional influence on the environment, capability of achieving the purpose of carbon saving and emission reduction, simple operation and convenience for use of a user, and is equipped with an automatic control unit.
(II) the system leads CO to be dissolved in the gas by a pressurizing and gas dissolving device2Fully mixing with water under the pressurization condition to form carbonic acid solution, fully mixing the carbonic acid solution with alkaline water through an ejector to reduce the pH value of the water, and improving CO2The utilization rate and good economic benefit are achieved.
(III) with the continuous development of industrialization, CO in industrial waste gas2The recycling of the CO in the system has a large market2The gas can utilize CO collected in industrial production2Exhaust gas to realize CO2Resource utilization, energy conservation and emission reduction, and good environmental protection benefit.
Drawings
FIG. 1 is a schematic representation of the utilization of CO2A system for regulating and controlling the pH value of the effluent of the chemical crystallization granulation fluidized bed.
FIG. 2 is CO2A pressurized dissolving unit.
FIG. 3 shows CO at different pH values of the effluent from the fluidized bed2The addition amount has the effect of adjusting the pH of the softened effluent of the fluidized bed.
The meaning of the individual reference symbols in the figures is: 1-chemical crystallization granulation fluidized bed unit, 2-CO2Addition unit, 3-CO2A pressurizing and dissolving unit and a 4-carbonic acid adding unit;
101-a chemical crystallization granulation fluidized bed main body, 102-a fluidized bed water inlet pipe and 103-a fluidized bed water outlet pipe; 104-a water inlet pump, 105-a raw water storage tank, 106-a dosing pump, 107-an alkali liquor storage tank and 108-a water inlet flow meter;
201-CO2gas cylinder, 202-CO2The system comprises a gas conveying pipe, 203-an electric heating type pressure reducing valve, 204-a gas valve, 205-a gas flowmeter;
301-a pressure tank, 302-a stirring paddle, 303-a stirring motor, 304-a dissolving water inlet pipe, 305-a dissolving water outlet pipe, 306-an air inlet pipe, 307-an aeration head, 308-a pressure gauge, 309-a safety valve, 310-a guide plate, 311-a sewage discharge outlet, 312-an internal return pipe, 313-an internal return pump, 314-a first gate valve, 315-a second gate valve and 316-a liquid flow meter;
401-jet device, 402-first flow regulating valve, 403-second flow regulating valve, 404-tubular static mixer, 405-first pH on-line detector, 406-second pH on-line detector.
The present invention will be explained in further detail with reference to examples.
Detailed Description
It is to be understood that all parts, devices and apparatus of the present invention, unless otherwise specified, are intended to be included within the scope of the present invention as defined in the appended claims.
The carbonic acid is an environment-friendly acidifier, does not need protection and treatment of dangerous and erosive acid, does not relate to the corrosion problem, and can be directly added into pipelines, pools and even shallow channels. The utility model is prepared by mixing CO2The gas is dissolved in water under the pressurization condition to form carbonic acid solution to adjust the pH value of the effluent of the fluidized bed, the system is simple and convenient to operate, can realize automatic control in the follow-up process, and has stable adjustment effect, thereby realizing CO2And (5) resource utilization.
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
Example (b):
this example shows the utilization of CO2A system for regulating and controlling the pH of effluent of a chemical crystallization granulation fluidized bed, as shown in fig. 1 and fig. 2, comprises a chemical crystallization granulation fluidized bed unit 1, wherein the chemical crystallization granulation fluidized bed unit 1 comprises a chemical crystallization granulation fluidized bed main body 101, a fluidized bed water inlet pipe 102 is arranged at the bottom of the chemical crystallization granulation fluidized bed main body 101, and a fluidized bed water outlet pipe 103 is arranged at the top of the chemical crystallization granulation fluidized bed main body 101;
also comprises CO2Adding unit 2, CO2A pressurizing and dissolving unit 3 and a carbonic acid adding unit 4;
CO2the adding unit 2 comprises CO2Gas cylinder 201, CO2CO is communicated with the gas storage cylinder 2012One end of the gas delivery pipe 202, CO2Alternative to gas delivery conduit 202One end is connected with CO2The air inlet pipe 306 in the pressurizing and dissolving unit 3 is communicated;
CO2the pressurizing and dissolving unit 3 comprises a pressure tank 301, a stirring paddle 302 is arranged in the pressure tank 301, and the stirring paddle 302 is driven by a stirring motor 303; a dissolving water inlet pipe 304 is arranged at the lower part of the pressure tank 301, the dissolving water inlet pipe 304 is communicated with the fluidized bed water inlet pipe 102, a dissolving water outlet pipe 305 is arranged at the upper part of the pressure tank 301, the dissolving water outlet pipe 305 is communicated with a feed inlet of a jet device 401 in the carbonic acid adding unit 4, an air inlet pipe 306 is arranged at the lower part in the pressure tank 301, and a plurality of aeration heads 307 are arranged on the air inlet pipe 306;
the carbonic acid adding unit 4 comprises an ejector 401, the ejector 401 and a first flow regulating valve 402 are connected in series and then connected in parallel on a fluidized bed water outlet pipe 103, a second flow regulating valve 403 is arranged on the fluidized bed water outlet pipe 103 connected in parallel with the ejector 401, and a tubular static mixer 404 is arranged on the fluidized bed water outlet pipe 103 at the downstream of the ejector 401.
In a preferred embodiment of this embodiment, the chemical crystallization granulation fluid bed main body 101 is a chemical crystallization granulation fluid bed main body known in the art, and may be used for circulation granulation or non-circulation granulation. For example, the chemical crystallization granulation fluid bed body 101 employs a known chemical crystallization circulating granulation fluid bed body.
As a preferable scheme of this embodiment, the fluidized bed water inlet pipe 102 takes water from the raw water reservoir 105 through the water inlet pump 104; the chemical feeding port at the bottom of the chemical crystallization granulation fluidized bed body 101 is used for taking medicine from an alkali liquor storage tank 107 through a feeding pump 106. The lye in the lye storage tank 107 is a lye, such as a sodium hydroxide solution or the like.
As a preferred embodiment of this example, CO2An electric heating type pressure reducing valve 203 is arranged on an air outlet at the top of the gas storage cylinder 201; CO 22The gas pipe 202 is provided with a gas valve 204. The pressure range of the heating type pressure reducing valve 203 is controlled between 0.3mpa and 0.5mpa, and the pressure is properly adjusted according to the pH value of the effluent.
As a preferable scheme of the embodiment, the top of the pressure tank 301 is provided with a pressure gauge 308 and a safety valve 309, the inner wall of the pressure tank 301 is provided with a guide plate 310, and the bottom of the pressure tank 301 is provided with a sewage draining outlet 311.
In a preferred embodiment of the present invention, the pressure tank 301 is a cylindrical sealed tank, and the ratio of the height to the diameter of the tank is 3: 1.
As a preferable scheme of this embodiment, an internal return pipe 312 is provided outside the pressure tank; the inner return pipe 312 is provided with an inner return pump 313 and a first gate valve 314. The internal return pipe 312 further increases CO2The dissolution efficiency of (a).
As a preferable scheme of this embodiment, the dissolving water inlet pipe 304 is provided with a second gate valve 315.
As a preferable scheme of this embodiment, the aeration heads 307 are arranged in a cross shape, and the distance between two adjacent aeration heads 307 is 15cm, and 5 aeration heads are arranged in total. The aeration head 307 discharges CO2The gas is converted into small bubbles into the pressure tank 301. Operation of the paddles 302 during operation of the pressure tank 301 promotes CO2Dissolving to form carbonic acid solution, the rotating speed of the stirring paddle 302 is 2-3 r/s,
as a preferable scheme of the embodiment, the fluidized bed water inlet pipe 102 is provided with a water inlet flow meter 108, and CO2The gas flow meter 205 is arranged on the gas pipe 202, and the liquid flow meter 316 is arranged on the dissolving water inlet pipe 304; a first pH online detector 405 is arranged on the fluidized bed water outlet pipe 103 at the upstream of the ejector 401, and a second pH online detector 406 is arranged on the fluidized bed water outlet pipe 103 at the downstream of the tubular static mixer 404. The index detection equipment can be connected with a controller in the follow-up process to realize automatic control.
In this embodiment, the water in the pressure tank 301 can be directly fed into the fluidized bed without the need of additional water source, CO2Adding the carbon acid solution into a pressure tank 301, then quickly mixing the carbon acid solution under a pressurization condition to form a carbon acid solution, adding the formed carbon acid solution into a fluidized bed water outlet pipe 103 through an ejector 401 to adjust the pH value of fluidized bed water outlet from 9.5-11 to 7-8, wherein the ratio of the amount of the formed carbon acid solution to the amount of fluidized bed water to be treated is 1: 10-1: 33, and CO2The dosage and the water inlet flow of the pressure tank 301 can be adjusted according to the requirement.
Application example:
this application example shows a method of using CO in example 12The specific case of a system for regulating and controlling the pH value of effluent of a chemical crystallization granulation fluidized bed. Raw water is introduced into the system through a water inlet pump 104, the pH of inlet water is 8.3, the calcium hardness is 5.02mmol/L, the alkalinity is 4.75mmol/L, and the inlet water flow is 20m3And h, opening a second gate valve 315 on the dissolution water inlet pipe 304 of the pressure tank 301, opening a safety valve 309 at the top of the pressure tank 301 to discharge air after the pressure tank 301 starts to inject raw water, and closing the safety valve 309 after the pressure tank 301 is filled with raw water. The gas valve 204 is opened to start the introduction of CO2Turning on the stirring motor 303 to start stirring by the stirring paddle 302, turning on the dosing pump 106 to start adding NaOH and CO into the fluidized bed body 101 of the chemical crystallization granulation2The gas enters the bottom of the pressure tank 301 through the gas inlet pipe 306 and is converted into micro bubbles through the aeration head 307, the micro bubbles enter the pressure tank 301, and CO enters the pressure tank under the action of the paddle of the stirring paddle 3022The bubbles are fully mixed with the raw water, the rotating speed of a stirring paddle 302 in the pressure tank 301 is 2-3 revolutions per second, when the dissolved air pressure in the pressure tank 301 is increased to about 0.4mpa, a water outlet valve of the pressure tank 301 is opened and liquid drainage is started through a dissolving water outlet pipe 305, an internal reflux pump 313 is started after the liquid drainage is started, and the flow of the internal reflux pump 313 is 2m3The internal return pipe 312 further improves the gas-liquid mixing efficiency in the pressure tank 301, so that CO can be mixed2The gas is fully dissolved, the carbonic acid solution formed by the pressure tank 301 flows through the dissolving water outlet pipe 305 of the pressure tank 301 and is injected into the fluidized bed water outlet pipe 103 through the ejector 401, the carbonic acid solution and the fluidized bed softened water are fully mixed under the action of the tubular static mixer 404, the purpose of adjusting the pH value of the softened water is achieved, the pH value of the fluidized bed softened water is detected to be 10.15 by the first pH online detector 405, the calcium hardness of the water is detected to be 0.48mmol/L, the pH value of the softened water is detected to be 7.83 by the carbonic acid adding sheet after being adjusted by the second pH online detector 406 after being adjusted, the adjusting effect is good, and under the working condition, the CO is dissolved and flows through the dissolving water outlet pipe 305 of the pressure tank 301 and is injected into the fluidized bed water outlet pipe 103 through the ejector 401, and the softened water is fully mixed under the action of the tubular static mixer 404, the pH value is detected to be 7.83 by the second pH online detector 406, and the adjusting effect is good, and the CO is obtained2The adding amount is 71.4mg/L, the system has good running condition within 24h of continuous running and stable adjusting effect, and CO is added under the condition of different pH values of the softened effluent of the fluidized bed2The effect of the addition on the pH of the effluent from the fluidised bed is shown in FIG. 3.
Claims (9)
1. By using CO2System of regulation and control chemical crystallization granulation fluidized bed play water pH, including chemical crystallization granulation fluidized bed unit (1), chemical crystallization granulation fluidized bed unit (1) including chemical crystallization granulation fluidized bed main part (101), the bottom of chemical crystallization granulation fluidized bed main part (101) is provided with fluidized bed inlet tube (102), the top of chemical crystallization granulation fluidized bed main part (101) is provided with fluidized bed outlet pipe (103), its characterized in that:
and further comprises CO2Adding unit (2), CO2A pressurizing and dissolving unit (3) and a carbonic acid adding unit (4);
said CO2The adding unit (2) comprises CO2Gas cylinder (201), CO2CO is communicated with the gas storage bottle (201)2One end of the gas delivery pipe (202), CO2The other end of the gas transmission pipe (202) and CO2An air inlet pipe (306) in the pressurizing and dissolving unit (3) is communicated;
said CO2The pressurizing and dissolving unit (3) comprises a pressure tank (301), a stirring paddle (302) is arranged in the pressure tank (301), and the stirring paddle (302) is driven by a stirring motor (303); a dissolving water inlet pipe (304) is arranged at the lower part of the pressure tank (301), the dissolving water inlet pipe (304) is communicated with the fluidized bed water inlet pipe (102), a dissolving water outlet pipe (305) is arranged at the upper part of the pressure tank (301), the dissolving water outlet pipe (305) is communicated with a feed inlet of a jet aerator (401) in the carbonic acid adding unit (4), an air inlet pipe (306) is arranged at the lower part in the pressure tank (301), and a plurality of aeration heads (307) are arranged on the air inlet pipe (306);
the carbonic acid adding unit (4) comprises an ejector (401), the ejector (401) and a first flow regulating valve (402) are connected in series and then are connected in parallel on a fluidized bed water outlet pipe (103), a second flow regulating valve (403) is arranged on the fluidized bed water outlet pipe (103) connected in parallel with the ejector (401), and a tubular static mixer (404) is arranged on the fluidized bed water outlet pipe (103) at the downstream of the ejector (401).
2. The catalyst of claim 1 using CO2The system for regulating and controlling the pH value of the effluent of the chemical crystallization granulation fluidized bed is characterized in that a water inlet pipe (102) of the fluidized bed passes through a water inlet pump (104) and is fed with raw waterTaking water from a water storage tank (105); the chemical feeding port at the bottom of the chemical crystallization granulation fluidized bed main body (101) is used for taking medicine from an alkali liquor storage tank (107) through a medicine feeding pump (106).
3. The catalyst of claim 1 using CO2The system for regulating and controlling the pH value of effluent of the fluidized bed for chemical crystallization and granulation is characterized in that the CO is2An electric heating type pressure reducing valve (203) is arranged on an air outlet at the top of the gas storage cylinder (201); CO 22The gas pipe (202) is provided with a gas valve (204).
4. The catalyst of claim 1 using CO2The system for regulating and controlling the pH value of effluent of the chemical crystallization granulation fluidized bed is characterized in that a pressure gauge (308) and a safety valve (309) are arranged at the top of the pressure tank (301), a guide plate (310) is arranged on the inner wall of the pressure tank (301), and a drain outlet (311) is arranged at the bottom of the pressure tank (301).
5. The catalyst of claim 1 using CO2The system for regulating and controlling the pH value of effluent of the chemical crystallization granulation fluidized bed is characterized in that the pressure tank (301) is a cylindrical sealed tank body, and the ratio of the height to the diameter of the tank body is 3: 1.
6. The catalyst of claim 1 using CO2The system for regulating and controlling the pH value of the effluent of the chemical crystallization granulation fluidized bed is characterized in that an inner return pipe (312) is arranged outside the pressure tank; an inner reflux pump (313) and a first gate valve (314) are arranged on the inner reflux pipe (312).
7. The catalyst of claim 1 using CO2The system for regulating and controlling the pH value of the effluent of the chemical crystallization granulation fluidized bed is characterized in that a second gate valve (315) is arranged on the dissolution water inlet pipe (304).
8. The catalyst of claim 1 using CO2The system for regulating and controlling the pH value of the effluent of the chemical crystallization granulation fluidized bed is characterized in that the aeration heads (307) are arranged in a cross shape, the distance between every two adjacent aeration heads (307) is 15cm, and the aeration heads are arranged together5 pieces of the Chinese herbal medicines.
9. The catalyst of claim 1 using CO2The system for regulating and controlling the pH value of the effluent of the chemical crystallization granulation fluidized bed is characterized in that a water inlet flow meter (108) is arranged on a water inlet pipe (102) of the fluidized bed, and the CO is discharged from the fluidized bed2A gas flowmeter (205) is arranged on the gas transmission pipe (202), and a liquid flowmeter (316) is arranged on the dissolution water inlet pipe (304); a first pH online detector (405) is arranged on the fluidized bed water outlet pipe (103) at the upstream of the ejector (401), and a second pH online detector (406) is arranged on the fluidized bed water outlet pipe (103) at the downstream of the tubular static mixer (404).
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