CN210974542U - Multistage reaction system for realizing segmented regulation - Google Patents
Multistage reaction system for realizing segmented regulation Download PDFInfo
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Abstract
The utility model provides a multistage reaction system for realizing segmented regulation, which comprises a gas supply unit, a reaction unit and a condensation unit which are connected in sequence; the reaction unit comprises a heating device which is divided into at least two communicated heating sections; the outlet of the air supply unit is led out of at least two air inlet pipelines, the outlet ends of the air inlet pipelines are respectively connected into different heating sections, and the air supply unit supplies air to the different heating sections independently through the air inlet pipelines. The utility model discloses an aperture of adjustment three-way valve realizes that multicomponent gas mixes according to different proportions wantonly, reaches the purpose of the segmentation regulation and control of the inside reaction atmosphere of multistage reaction system to satisfy the demand of coal quality conversion technology to different reaction atmospheres.
Description
Technical Field
The utility model belongs to the technical field of the coal chemical industry, a multistage reaction system is related to, especially relate to a realize multistage reaction system of segmentation regulation and control.
Background
The low-carbon olefins such as ethylene, propylene and the like are important basic chemical raw materials, and along with the development of national economy in China, particularly the development of modern chemical industry, the demand of the low-carbon olefins is gradually increased, and the contradiction between supply and demand is increasingly prominent. At present, ethylene and propylene are mainly produced by a petrochemical route, but the petroleum resources in China are in short supply, the dependence of petroleum import is increased year by year, and the development of producing ethylene and propylene products by the petrochemical route is limited to a certain extent.
More than 70% of primary energy in China comes from coal, the coal is a main energy supply form in China, the development of comprehensive utilization and clean utilization of the coal is an important task of coal research workers in China, the utilization of the coal comprises the forms of combustion power generation, pyrolysis cogeneration of oil gas and semi-coke, coal gasification coupled gas turbine power generation and electric heat conversion and the like, and the high-value routes of olefin preparation by direct catalysis of the coal and olefin preparation by Fischer-Tropsch synthesis through gasification are greatly supported by the nation at present, so that the method is favorable for solving the embarrassing situation that basic chemical raw materials in China seriously depend on difficultly self-sufficient petrochemical industry. Therefore, the research on the regulation and control mechanism of the internal coal thermal cracking or chemical change process is the key task of the majority of researchers at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a be not enough to prior art exists, the utility model aims to provide a realize multistage reaction system of segmentation regulation and control realizes that multicomponent gas mixes wantonly according to different proportions through the aperture of adjustment three-way valve, reaches the purpose of the segmentation regulation and control of the inside reaction atmosphere of multistage reaction system to satisfy the demand of coal quality conversion technology to different reaction atmospheres.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a realize multistage reaction system of segmentation regulation and control, multistage reaction system including the air feed unit, reaction unit and the condensation unit that connect gradually.
The reaction unit comprises a heating device, and the heating device is divided into at least two communicated heating sections.
The outlet of the air supply unit is led out of at least two air inlet pipelines, the outlet ends of the air inlet pipelines are respectively and independently connected into different heating sections, and the air supply unit supplies air to the different heating sections independently through the air inlet pipeline.
The utility model discloses especially, to coal matter conversion reaction process design a realize multistage reaction system of segmentation regulation and control, at coal macromolecular structure fracture, the in-process of fusion and phase transition, need provide the reaction atmosphere and customize the chemical derivation route, the utility model provides a multistage reaction system can provide different reaction atmospheres on line, coal matter conversion is a high carbon-containing reaction route, and high-valued is a hydrogen-rich process, on the one hand need mix hydrogen-rich gas such as hydrogen in the reaction process, on the one hand need provide active gas such as vapor, guarantees that coal macromolecule fracture formation free radical can carry out the regularization reaction under appropriate atmosphere, the utility model provides a multistage reaction system provides corresponding multicomponent gas and vapor generating device and satisfies the regulation and control needs. The coal quality conversion process is the reaction process of multistage many sequences, the utility model provides a multistage reaction system can realize the multistage reaction function through segmenting heating device.
As an optimized technical scheme of the utility model, the reaction unit still include preheating device, preheating device respectively the different heating sections of independent connection.
The utility model adopts a preheating device which can be a resistance wire heating furnace, a radiation furnace or a gold furnace.
The preheating device is externally connected with a delivery pump, and liquid and/or vapor are delivered into the preheating device through the delivery pump.
The delivery pump is a peristaltic pump or a advection pump.
The utility model discloses in, if the liquid of carrying be ordinary liquid, optional delivery pump is the peristaltic pump, if what carry is high pressure liquid, optional delivery pump is the advection pump.
And a temperature detection device is arranged on the heating section.
As an optimal technical scheme, the intake pipeline on be provided with mixing arrangement, each way gas that the air feed unit carried mix in mixing arrangement evenly after preheating device preheats and gets into different heating sections.
The utility model provides an establish whirl board isotructure in the mixing arrangement to promote mixed effect.
As an optimized technical scheme of the utility model, the air feed unit include that at least one air feed of mutual independence is responsible for, to the air feed be responsible for in let in different gas.
The gas supply main pipe comprises any one or at least two independent helium supply pipelines, hydrogen supply pipelines, carbon dioxide supply pipelines or carbon monoxide supply pipelines.
The utility model discloses in, the different air supplies are responsible for and are all independently set up mass flow meter, realize the accurate control of single air supply, guarantee gas flow and precision.
The gas supply main pipe is sequentially provided with a filtering device, a ball valve, a mass flow meter and a one-way valve along the gas flow direction.
The utility model discloses do not do special requirement and specifically inject to mass flow meter's specific type model, the mass flow meter of the arbitrary type that has disclosed or not disclosed in the new technology among the prior art all can be used in the utility model discloses in, especially, preferably adopt electromagnetic flowmeter.
The outlet end of the gas supply main pipe is connected to the same gas inlet pipeline, and each path of gas enters the gas inlet pipeline through different gas supply main pipes.
As an optimized technical proposal, the air outlet end of the air supply main pipe is led out at least one air supply branch pipe.
The outlet end of one air supply branch pipe led out from each air supply main pipe is connected to the same air inlet pipeline, and each path of air enters the corresponding air supply branch pipe through different air supply main pipes and is mixed in a mixing device arranged on the air inlet pipeline.
The utility model discloses in, connect through the cutting ferrule between the pipeline, prevent gas leakage and anti-cluster.
As an optimal technical scheme, the junction of air supply branch pipe and air supply main road be provided with the three-way valve, adjust the content that different gases got into air intake pipe through the aperture that changes the three-way valve.
As a preferred technical solution of the present invention, the condensing unit includes at least one condensing device.
And a liquid collecting device is arranged at a condensate outlet end of the condensing unit.
The condensing device is a jacket condensing pipe or a snakelike condensing pipe.
As an optimized technical scheme of the utility model, the condensing unit including one-level condensing equipment, second grade condensing equipment and the tertiary condensing equipment who establishes ties in proper order.
The first-stage condensing device and the third-stage condensing device are longitudinally arranged, the second-stage condensing device is transversely arranged, the bottom outlet of the first-stage condensing device is transversely connected with the second-stage condensing device, and the outlet of the second-stage condensing device is longitudinally connected with the bottom inlet of the third-stage condensing device.
And liquid collecting devices are arranged at the bottoms of the first-stage condensing device and the third-stage condensing device.
As a preferred technical scheme of the utility model, multistage reaction system include with the purification unit that condensing unit's gas outlet end is connected.
The purification unit comprises at least two stages of purification devices which are connected in series in sequence, and the outlet end of the last stage of purification device is provided with a vacuumizing device.
The purification device is a brinell washing bottle.
The vacuum pumping device is a vacuum pump.
The vacuum pump is an oil-free vacuum pump or an oil vacuum pump.
As a preferred technical scheme of the utility model, multistage reaction system still include the control unit, the control unit include temperature control module and flow control module.
The temperature control module is respectively and independently electrically connected with the temperature detection devices on different heating sections, and the temperature control module is used for independently controlling the reaction temperatures of the different heating sections.
The flow control module is electrically connected with the mass flow meters arranged on the gas supply main pipes, and receives feedback information from the mass flow meters and controls the opening of the corresponding ball valves.
The utility model discloses in, the technical personnel in the field can also add pressure control module according to the actual production demand for detect and the inside reaction pressure of feedback control heating device.
Furthermore, the utility model provides a multistage reaction system can also realize integrated assembly, and specific assembly mode is as follows: will the utility model provides an integrated assembly of multistage reaction system is in portable integrated box, and portable integrated box is inside to be divided into operating area, reaction zone, display area and equipment district.
The operation area is used for assembling the gas supply units (mainly comprising each gas supply pipeline), and operators can mix different gas components according to any proportion by manually adjusting the opening of ball valves on different gas supply pipelines to obtain the reaction atmosphere required by coal quality conversion.
The reaction zone is used for assembling a reaction unit (comprising a heating device and a preheating device).
The display area is used for assembling a display unit (mainly comprising an operation panel, a display screen and an integrated circuit) and a control unit, a mass flowmeter arranged on each gas supply pipeline and a temperature detection device or other parameter sensors arranged on the reaction section are collected by a P L C collector on the integrated circuit and transmitted to the display screen, an operator inputs feedback information on the operation panel according to displayed operation parameter information, and the control unit controls the corresponding ball valve, the heating section and the like.
The equipment area is used for assembling a condensation unit, a purification unit and various delivery pumps, wherein the condensation unit comprises a condensation medium circulator besides a condensation device.
The system refers to an equipment system, or a production equipment.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses an aperture of adjustment three-way valve realizes that multicomponent gas mixes according to different proportions wantonly, reaches the purpose of the segmentation regulation and control of the inside reaction atmosphere of multistage reaction system to satisfy the demand of coal quality conversion technology to different reaction atmospheres.
(3) And tail gas is subjected to condensation step by step to collect a liquid sample, and gas is subjected to deep purification to carry out online test, so that the comprehensive collection and analysis utilization of products are realized.
Drawings
FIG. 1 is a schematic structural diagram of a multi-stage reaction system according to an embodiment of the present invention;
FIG. 2 is an integrated assembly diagram of a multi-stage reaction system according to an embodiment of the present invention;
wherein, 1-helium supply pipeline; 2-a hydrogen supply line; 3-a carbon dioxide supply line; 4-a carbon monoxide supply line; 5-a filtration device; 6-ball valve; 7-mass flow meter; 8-a one-way valve; 9-three-way valve; 10-gas supply branch pipe; 11-a first intake line; 12-a first mixing device; 13-first preheating means; 14-a first delivery pump; 15-a second intake line; 16-a second mixing device; 17-a second preheating device; 18-a second delivery pump; 19-a heating device; 20-upper heating section; 21-lower stage heating section; 22-first temperature detection means; 23-second temperature detection means; 24-primary condensing means; 25-a secondary condensing unit; 26-a tertiary condensing unit; 27-a first liquid trap; 28-a second liquid collection device; 29-a purification device; 30-a vacuum pump; 31-an operating zone; 32-a reaction zone; 33-a display area; 34-equipment area; 35-condensing medium circulator.
Detailed Description
It is to be understood that in the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, the definition of "first," "second," "third," and the like may explicitly or implicitly include one or more of the features.
It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" in the description of the present invention are to be construed broadly, and may for example be fixedly connected, detachably connected or integrally connected; 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 meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
In a specific embodiment, the utility model provides a realize multistage reaction system of segmentation regulation and control, multistage reaction system as shown in figure 1, including the air feed unit, reaction unit and the condensing unit that connect gradually. The reaction unit comprises a heating device 19, the heating device 19 is divided into at least two communicated heating sections, and a temperature detection device is arranged on each heating section. The reaction unit also comprises at least two preheating devices, the preheating devices are respectively and independently connected with different heating sections, the preheating devices are externally connected with a delivery pump, and liquid and/or water vapor are delivered into the preheating devices through the delivery pump.
At least two air inlet pipelines are led out from the outlet of the air supply unit, the outlet ends of the air inlet pipelines are respectively connected into different heating sections, the air supply unit supplies air to the different heating sections independently through the air inlet pipelines, a mixing device is arranged on the air inlet pipelines, and each path of air conveyed by the air supply unit is uniformly mixed in the mixing device and then enters the different heating sections through the preheating device.
The gas supply unit comprises at least one gas supply main pipe which is mutually independent, and different gases are introduced into the gas supply main pipe. The utility model discloses optional air feed is responsible for and is included one arbitrary or at least two in mutually independent helium supply line 1, hydrogen supply line 2, carbon dioxide supply line 3 or carbon monoxide supply line 4. The upper part of the gas supply main pipe is sequentially provided with a filtering device 5, a ball valve 6, a mass flow meter 7 and a one-way valve 8 along the gas flow direction; the outlet end of the main gas supply pipe is connected to the same gas inlet pipeline, and each path of gas enters the gas inlet pipeline through different main gas supply pipes. At least one air supply branch pipe 10 is led out from the air outlet end of the air supply main pipe, the outlet end of one air supply branch pipe 10 led out from each air supply main pipe is connected to the same air inlet pipeline, and all the air flows enter the corresponding air supply branch pipes 10 through different air supply main pipes and are mixed in a mixing device arranged on the air inlet pipeline. The junction of the branch gas supply pipe 10 and the main gas supply path is provided with a three-way valve 9, and the content of different gases entering the gas inlet pipeline is adjusted by changing the opening degree of the three-way valve 9.
The condensing unit is provided with a collection liquid device including at least one condensing equipment of establishing ties, condensing unit's condensate outlet end the utility model discloses in, optional condensing equipment is for pressing from both sides cover condenser pipe or snakelike condenser pipe.
Multistage reaction system includes the purification unit who is connected with the gas outlet end of condensing unit, and the purification unit is including the multistage purifier 29 who establishes ties in proper order, and last one-level purifier 29's exit end is provided with evacuating device, the utility model discloses optional purifier 29 is the brinell wash-bottle, and optional vacuum pump 30 is for not having oil vacuum pump 30 or oil vacuum pump 30.
The multi-stage reaction system further comprises a control unit, and the control unit comprises a temperature control module and a flow control module. The temperature control module is respectively and independently electrically connected with the temperature detection devices on different heating sections, and the temperature control module is used for independently controlling the reaction temperatures of the different heating sections. The flow control module is electrically connected with the mass flow meters 7 arranged on the gas supply main pipes, and receives feedback information of the mass flow meters 7 and controls the opening of the corresponding ball valves 6.
Example 1
The embodiment provides a multistage reaction system as shown in figure 1, the utility model provides a multistage reaction system for realizing segmented regulation, multistage reaction system as shown in figure 1, including gas supply unit, reaction unit and the condensing unit that connects gradually. Wherein, the reaction unit comprises a heating device 19, the heating device 19 is divided into an upper heating section 20 and a lower heating section 21 which are communicated with each other in the vertical direction, and a first temperature detection device 22 and a second temperature detection device 23 are respectively arranged on the upper heating section 20 and the lower heating section 21. The reaction unit further comprises a first preheating device 13 and a second preheating device 17, the first preheating device 13 is connected with an upper heating section 20, the second preheating device 17 is connected with a lower heating section 21, the first preheating device 13 is externally connected with a first delivery pump 14, the second preheating device 17 is externally connected with a second delivery pump 18, and liquid and/or vapor are delivered into the first preheating device 13 and the second preheating device 17 which are respectively connected through the first delivery pump 14 and the second delivery pump 18.
The outlet of the air supply unit leads out a first air inlet pipeline 11 and a second air inlet pipeline 15, the outlet ends of the first air inlet pipeline 11 and the second air inlet pipeline 15 are respectively connected to a higher heating section 20 and a lower heating section 21, the air supply unit independently supplies air to the higher heating section 20 and the lower heating section 21 through the first air inlet pipeline 11 and the second air inlet pipeline 15, the first air inlet pipeline 11 is provided with a first mixing device 12, and the second air inlet pipeline 15 is provided with a second mixing device 16.
The gas supply unit comprises four mutually independent gas supply main pipes, the gas supply main pipes independently supply different types of gas, and the four gas supply main pipes are named as the following gas supply main pipes respectively according to different types of supplied gas: the gas supply system comprises a helium supply pipeline 1, a hydrogen supply pipeline 2, a carbon dioxide supply pipeline 3 and a carbon monoxide supply pipeline 4, wherein a filtering device 5, a ball valve 6, a mass flow meter 7 and a one-way valve 8 are sequentially arranged on a gas supply main pipe along the gas flow direction. The outlet ends of the four main gas supply pipes are connected to a second gas inlet pipeline 15, and each path of gas (including helium, hydrogen, carbon dioxide and carbon monoxide) enters the second gas inlet pipeline 15 through the respective specific main gas supply pipe and is mixed in a second mixing device 16 arranged on the second gas inlet pipeline 15. The air outlet ends of the four main air supply pipes are respectively led out of a branch air supply pipe 10 through a three-way valve 9, the outlet ends of the four branch air supply pipes 10 are connected to a first air inlet pipeline 11, and the air in each branch air supply pipe enters the corresponding branch air supply pipe 10 through the specific main air supply pipe and is mixed in a first mixing device 12 arranged on the first air inlet pipeline 11.
The condensing unit is including the one-level condensing equipment 24 of establishing ties in proper order, second grade condensing equipment 25 and tertiary condensing equipment 26, wherein, one-level condensing equipment 24, second grade condensing equipment 25 and tertiary condensing equipment 26's arrangement mode respectively has the difference, one-level condensing equipment 24 and tertiary condensing equipment 26 vertically set up, second grade condensing equipment 25 transversely sets up, one-level condensing equipment 24's bottom export transverse connection second grade condensing equipment 25, the export longitudinal connection tertiary condensing equipment 26's of second grade condensing equipment 25 bottom entry, one-level condensing equipment 24's bottom is provided with first album of liquid device 27, tertiary condensing equipment 26's bottom is provided with second album of liquid device 28.
The multistage reaction system comprises a purification unit connected with the gas outlet end of the condensation unit, the purification unit comprises four-stage purification devices 29 which are sequentially connected in series, and the outlet end of the last-stage purification device 29 is provided with a vacuum pump 30.
The multi-stage reaction system further includes a control unit (not shown in the drawings) including a temperature control module and a flow control module. The temperature control module is electrically connected with the first temperature detection device 22 and the second temperature detection device 23 respectively and independently, and the temperature control module is used for independently controlling the reaction temperatures of different heating sections. The flow control module is electrically connected with the mass flow meters 7 arranged on the gas supply main pipes, and receives feedback information of the mass flow meters 7 and controls the opening of the corresponding ball valves 6.
Example 2
In this embodiment, the multistage reaction system provided in embodiment 1 is integrally assembled in a mobile integrated box, the mobile integrated box is divided into an operation area 31, a reaction area 32, a display area 33 and an equipment area 34, for simplifying the drawing, some pipelines and equipment are omitted, this embodiment is only used to exemplarily describe the assembly relationship and the assembly manner among the units in the multistage reaction system, and for the specific equipment in each unit and the connection method between the equipment, reference may be made to embodiment 1 and fig. 1.
The operation area 31 is used for assembling gas supply units (mainly comprising each gas supply pipeline), and operators can mix different gas components according to any proportion by manually adjusting the opening of the ball valves 6 on different gas supply pipelines to obtain the reaction atmosphere required by coal quality conversion.
The reaction zone 32 is used to assemble a reaction unit (comprising the heating device 19, the first preheating device 13 and the second preheating device 17).
The display area 33 is used for assembling a display unit (mainly comprising an operation panel, a display screen and an integrated circuit) and a control unit, the mass flow meter 7 arranged on each gas supply pipeline and a temperature detection device or other parameter sensors arranged on the reaction section are collected by a P L C collector on the integrated circuit and transmitted to the display screen, an operator inputs feedback information on the operation panel according to displayed operation parameter information, and the control unit controls the corresponding ball valve 6, the first heating section 20, the second heating section 21 and the like.
The equipment area 34 is used for assembling a condensing unit, a purifying unit and various delivery pumps, wherein the condensing unit comprises a condensing medium circulator 35 in addition to a condensing device.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (10)
1. A multi-stage reaction system for realizing segmented regulation is characterized by comprising an air supply unit, a reaction unit and a condensation unit which are sequentially connected;
the reaction unit comprises a heating device, and the heating device is divided into at least two communicated heating sections;
the outlet of the air supply unit is led out of at least two air inlet pipelines, the outlet ends of the air inlet pipelines are respectively and independently connected into different heating sections, and the air supply unit supplies air to the different heating sections independently through the air inlet pipeline.
2. The multi-stage reaction system of claim 1, wherein the reaction unit further comprises a preheating device, and the preheating device is independently connected with different heating sections;
the preheating device is externally connected with a delivery pump, and liquid and/or vapor are delivered into the preheating device through the delivery pump;
the delivery pump is a peristaltic pump or a advection pump;
and a temperature detection device is arranged on the heating section.
3. The multistage reaction system of claim 2, wherein a mixing device is disposed on the gas inlet pipeline, and the gases from the gas supply unit are mixed uniformly in the mixing device and then preheated by the preheating device into different heating sections.
4. The multistage reaction system according to claim 3, wherein the gas supply unit comprises at least one gas supply main pipe independent from each other, and different gases are introduced into the gas supply main pipe;
the gas supply main pipe comprises any one or at least two mutually independent helium supply pipelines, hydrogen supply pipelines, carbon dioxide supply pipelines or carbon monoxide supply pipelines;
the upper part of the gas supply main pipe is sequentially provided with a filtering device, a ball valve, a mass flow meter and a one-way valve along the gas flow direction;
the outlet end of the gas supply main pipe is connected to the same gas inlet pipeline, and each path of gas enters the gas inlet pipeline through different gas supply main pipes.
5. The multistage reaction system according to claim 4, wherein at least one gas supply branch pipe is led out from the gas outlet end of the gas supply main pipe;
the outlet end of one air supply branch pipe led out from each air supply main pipe is connected to the same air inlet pipeline, and each path of air enters the corresponding air supply branch pipe through different air supply main pipes and is mixed in a mixing device arranged on the air inlet pipeline.
6. The multistage reaction system according to claim 5, wherein a three-way valve is provided at the junction of the branch gas supply pipe and the main gas supply pipe, and the content of different gases entering the gas inlet pipeline is adjusted by changing the opening degree of the three-way valve.
7. The multi-stage reaction system of claim 6, wherein the condensing unit comprises at least one condensing device;
a liquid collecting device is arranged at a condensate outlet end of the condensing unit;
the condensing device is a jacket condensing pipe or a snakelike condensing pipe.
8. The multi-stage reaction system of claim 7, wherein the condensing unit comprises a first-stage condensing device, a second-stage condensing device and a third-stage condensing device which are connected in series in sequence;
the first-stage condensing device and the third-stage condensing device are longitudinally arranged, the second-stage condensing device is transversely arranged, a bottom outlet of the first-stage condensing device is transversely connected with the second-stage condensing device, and an outlet of the second-stage condensing device is longitudinally connected with a bottom inlet of the third-stage condensing device;
and liquid collecting devices are arranged at the bottoms of the first-stage condensing device and the third-stage condensing device.
9. The multistage reaction system according to claim 8, comprising a purification unit connected to a gas outlet end of the condensation unit;
the purification unit comprises at least two stages of purification devices which are connected in series in sequence, and the outlet end of the last stage of purification device is provided with a vacuumizing device;
the purification device is a brinell washing bottle;
the vacuum pumping device is a vacuum pump;
the vacuum pump is an oil-free vacuum pump or an oil vacuum pump.
10. The multi-stage reaction system of claim 9, further comprising a control unit, said control unit comprising a temperature control module and a flow control module;
the temperature control module is respectively and independently electrically connected with the temperature detection devices on different heating sections and is used for independently controlling the reaction temperatures of the different heating sections;
the flow control module is electrically connected with the mass flow meters arranged on the gas supply main pipes, and receives feedback information from the mass flow meters and controls the opening of the corresponding ball valves.
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| CN201921491108.XU CN210974542U (en) | 2019-09-09 | 2019-09-09 | Multistage reaction system for realizing segmented regulation |
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| CN201921491108.XU CN210974542U (en) | 2019-09-09 | 2019-09-09 | Multistage reaction system for realizing segmented regulation |
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