KR20200044583A - Apparatus for distilling separator - Google Patents

Abstract

The present invention relates to an apparatus for separating each material via a distillation method from two or more mixtures having different boiling points. More specifically, the present invention relates to a distillation type separator comprising: a separation container (100) forming a closed space (S1) and generating heat; a mixture supply port (101) formed on an upper side of the separation container; a first separation tube (102) in communication with a lower bottom surface of the separation container; and a second separation tube (103) installed to be spaced apart from the bottom surface of the separation container.

Description

Distillation separator {Apparatus for distilling separator}

The present invention relates to an apparatus for separating each material using a distillation method from two or more mixtures having different boiling points.

Patent invention 001 is a distillation system for separating a mixture of two or more components present in a feedstock into a low boiling point substance and a high boiling point substance by boiling point difference, wherein the low boiling point substance is evaporated and discharged into upper vapor, and the high boiling point substance is lowered. A condensation evaporator condensed in the water, and the water introduced from a water source heat exchanges with the upper steam, a condensation evaporator in which the upper steam and water condensate and evaporate, respectively, and a compressor for adiabatically compressing the water vapor evaporated in the condensation evaporator. It is configured, and relates to a distillation system and a distillation method of the distillation system, characterized in that the heat of the water vapor compressed in the compressor is supplied to an evaporation heat source for separation of the mixture quality in the evaporation separator.

Patent invention 002 is a distillation apparatus that classifies impurities from raw materials by fractional distillation method using difference in boiling point, and reforms the raw materials, the reactor having an internal space capable of heat treatment of the introduced raw materials and movement of separated impurities, and a lower portion in the reactor It is installed in, it includes an impeller including a blade that rotates while supplying hot air into the reactor. Therefore, according to the embodiment of patent invention 002, since hot air is supplied while rotating the impeller, hot air, which is a heat source, can be uniformly transmitted to the inside of the distillation apparatus. Accordingly, the material to be treated is in contact with the hot air, which is a heat source, evenly.

Patent invention 003 relates to a distillation system and a distillation method thereof, and the distillation system according to patent invention 003 is a distillation system that separates a mixed substance present in a feedstock into a low boiling point substance and a high boiling point substance using a boiling point difference, and has a low boiling point. An evaporation separator that evaporates material and discharges it as overhead vapor, a first compressor that adiabatically compresses the discharged upper vapor, and receives the adiabatic compressed upper vapor to supply the water supplied from the water source to the compressed upper vapor. And an evaporator for evaporating water into water vapor by heat exchange and a second compressor for receiving and compressing the evaporated water vapor. Thereby, the amount of saturated water vapor can be increased by compressing the upper steam before entering the evaporator and then generating saturated water vapor using the latent heat of condensation of the compressed upper steam.

Patent invention 004 relates to a distillation apparatus using a multi-stage column, the purpose of which is to recover the high-purity liquid by blocking the recovery of the gas having a high boiling point when separating only the required liquid from two or more liquids having different boiling points. A distillation apparatus using a multi-stage column according to patent invention 004 includes a distillation flask in which a liquid is stored and heating the liquid by a heater; A distillation column having a lower portion in fluid communication with the distillation flask and separating two or more gases heated and evaporated in the distillation flask; A condenser that is fluidly connected to the upper portion of the distillation column and condenses the separated and transferred gas along the distillation column; It includes; a storage flask for storing the liquid condensed through the condenser, the distillation column is a hollow tubular inside and a multi-stage separation membrane is formed therein, the separation membrane is formed of first and second separation holes of different diameters The gas having a high boiling point among the gases is blocked by the separation membrane and the second separation hole.

KR 10-0811971 B1 (Registration date March 03, 2008) KR 10-1779547 B1 (Registration date September 12, 2017) KR 10-1719067 B1 (Registration date March 16, 2017) KR 10-0983111 B1 (Registration date September 13, 2010)

The present invention relates to an apparatus for separating each material using a distillation method from two or more mixtures having different boiling points.

The present invention is an invention for a distillation type separator, and specifically forms a closed space (S1), a separation container (100) to be heated; a mixture supply port (101) formed above the separation container; and the bottom of the separation container It consists of a configuration comprising a; first separation pipe (102) in communication with the surface; and a second separation pipe (103) installed spaced apart from the bottom surface of the separation vessel.

The present invention is an invention for a distillation type separator, and in the invention presented above, it is located at the end of the second separation pipe, and the condensate collection port 210 is opened at the top; a condensation rod coupled inside the condensation collection port (220); includes.

The present invention is an invention for a distillation type separator, and in the invention presented above, it is formed of one or more, and the rotating blade (310) in contact with the inner diameter of the separation container.

 The present invention is an invention for a distillation type separator, and in the previously proposed invention, a first collection container 410 communicating with the first separation tube and collecting liquid; and communicating with the other side of the second separation tube, the fluid It includes; second collecting container 420 for collecting.

The present invention is an invention for a distillation type separator, and in the above-mentioned invention, a mixture container 500 that accommodates the mixture and forms a receiving space (S2); and a mixture communicating between the mixture container and the mixture supply port Supply pipe 510; includes.

The present invention is an invention for a distillation type separator, and in the invention presented above, the heat transfer plate 610 in contact with the outer surface of the separation container; includes.

The present invention relates to a distillation type separator, and in the previously proposed invention, a pressure control pump (710) formed on the mixture supply pipe (510) and controlling the supply amount of the mixture; communicating with the second separation pipe (103) Suction pump 440 formed in the fluid supply pipe 421; a pressure gauge 730 formed in the separation container to measure internal pressure; receiving the pressure gauge signal, the suction pump 440 and the Includes a pressure controller 720 to control the operation of the pressure control pump 710.

The present invention is an invention for a device for separating each material using a distillation method from two or more mixtures having different boiling points, and the following effects exist.

The present invention has a remarkable collection effect because it performs the primary liquefaction step by coagulation in the closed space and the secondary liquefaction step in the discharge step.

The present invention disperses the mixture material on the inner surface of the separation container using a groove, and applies the mixture material on the inner surface of the separation container using a rotating blade, thereby improving the efficiency of the heat contact of the mixture material.

1 is a conceptual diagram of an embodiment of the distillation separator of the present invention
2 is a conceptual diagram of supply and separation of the distillation separator of the present invention.
3 is a block diagram of a condensation rod and a condensate collection port of the present invention.
Figure 4 is a combination of various condensation rods and condensation rods of the present invention.
Figure 5 is a recovery relationship of the first separation tube of the present invention.
Figure 6 is a perspective view of the separation container of the present invention.
Figure 7 is a combination of various rotating blades and separation vessels of the present invention.
8 is a rotational blade and blade bracket coupling relationship of the present invention.
9 is a conceptual diagram of a pressure reducing device of the present invention.

Hereinafter, the most preferred embodiment of the present invention will be described in detail in order to describe in detail that a person skilled in the art to which the present invention pertains can easily implement the present invention. Citation relations of the following embodiments are only numbers provided to help technical understanding, and other embodiments not cited may be cited. Even if the configuration is not specified in the Examples below, it can be substituted for objects that exhibit similar purposes and effects. Even the concept of a sub-concept not specified in the following examples is regarded as specified.

[Example 1-1] The present invention relates to a distillation type separator, specifically to form a closed space (S1), the separation container 100 to be heated, the mixture supply port 101 formed on the upper side of the separation container; , A first separation tube 102 in communication with the bottom surface of the separation container; and a second separation tube 103 spaced apart from the bottom surface of the separation container.

The present invention is a device invention for heating a mixture material (liquid) having a different boiling point and separating the mixture materials respectively. The liquid mixture flows through the inner wall of the separation vessel, and the inner wall of the separation vessel heated in the course of the flow evaporates the liquid. The evaporated gas remains inside the closed space and is discharged to the second separation tube. Substances with a low boiling point are first evaporated, and substances with a high boiling point are collected at the bottom of the separation container while maintaining a liquid state.

Specifically, the separation container transfers a certain amount of heat to the closed space and is blocked from the outside. In the upper part of the separation container, the mixture material in a liquid state is introduced, and the introduced mixture material is heated while flowing on the inner wall of the separation container. Of the heated mixture, a substance having a low boiling point is converted into gas, and is located in a gas state inside the sealed container. On the other hand, materials with a high boiling point are collected in a liquid state under the closed space. The material under the closed space is discharged through the first separation pipe, and the gaseous material inside the closed space is discharged through the second separation pipe. In order to prevent the liquid material from being introduced into the second separation tube, the second separation tube is installed at a predetermined distance from the bottom surface of the separation container.

[Example 1-2] The present invention relates to a distillation type separator, and in Example 1-1, grooves 104 formed on the inner wall of the separation vessel and formed in one or more plurality.

The material flowing down the inner wall of the separation container should be uniformly distributed on the inner wall. In order to secure the uniformity, a plurality of grooves are formed at a uniform interval inside the separation vessel.

[Example 1-3] The present invention relates to a distillation separator, and in Example 1-2, the groove cross section is formed in an arc or polygonal shape.

Liquid flows through the groove and is located on the inner wall of the groove with surface tension. In addition, it is possible to induce a continuous flow due to the surface tension between materials while flowing down the groove. For optimum surface tension, the groove cross-section takes various shapes of arc or polygon. When taking the polygonal shape, a square or serrated shape is preferred.

[Example 1-4] The present invention relates to a distillation separator, and in Example 1-2, the groove is formed in a spiral shape.

It is preferable that the groove has a spiral shape. Through the helical groove, the flowing liquid stays inside the enclosed space for a long time and can absorb sufficient heat.

[Example 1-5] The present invention relates to a distillation type separator, and in Example 1-2, an orifice formed at a uniform or non-uniform interval is formed in the middle of the groove.

The groove induces a liquid flow. However, as the induction time increases (the longer the length through the groove), the liquid absorbs more heat, and the viscosity of the liquid decreases. When the viscosity decreases, the fluid velocity along the groove increases. When the flow rate increases, the liquid flow state is cut off, which decreases the discharge power by the flow cut off.

Therefore, in order to prevent flow breakage, an orifice is formed at regular intervals in the groove. Since the orifice causes a temporary cross-section reduction, the material flow is blocked for each section, which can prevent an increase in flow rate. The orifice spacing is uniform or non-uniform. It is preferable that the orifice spacing is narrower than the initial spacing of the grooves.

[Example 1-6] The present invention relates to a distillation type separator, and in Example 1-2, the groove groove area is formed differently or uniformly.

The liquid flowing along the grooves gets heated over time, which degrades viscosity. A decrease in viscosity causes an increase in flow rate, and an increase in flow rate causes an adverse flow phenomenon. To solve this, it is preferable to satisfy the same flow condition according to all the groove lengths, and in order to solve this, the groove cross-sectional area is formed differently by distinguishing the initial and terminal stages, but it is preferable to form a smaller cross-sectional area of the groove stage.

[Example 1-7] The present invention relates to a distillation type separator, and in Example 1-1, the separation container is formed of a metal.

[Example 1-8] The present invention relates to a distillation separator, and in Example 1-1, the metal is formed of copper or aluminum.

The separation vessel is formed of a metal, which is to improve thermal conductivity.

The metal is preferably formed of copper or aluminum. In addition, the metal must ensure corrosion resistance.

[Example 1-9] The present invention relates to a distillation type separator, and in Example 1-1, the bottom surface is inclined.

[Example 1-10] The present invention relates to a distillation type separator, and in Example 1-1, the first separation pipe and the bottom boundary are rounded or chamfered.

Among the mixtures, substances with a high boiling point remain liquid. To collect this, a first separation tube is formed, and the first separation tube communicates with the bottom surface. That is, the liquid contained in the bottom surface is intended to be easily discharged. Preferably, the bottom surface shape is taken as an inclined or inclined surface. This is to secure the ease of collecting liquid by gravity.

[Example 2-1] The present invention relates to a distillation type separator, and in Example 1-1, it is located at the end of the second separation pipe, and the condensate collection port 210 is opened at the top; Condensation rod 220 is coupled to the inside of the sphere; includes.

[Example 2-2] The present invention relates to a distillation type separator, and in Example 2-1, it is formed inside the condensing rod and includes cold / hot supply means 221 for supplying cold and hot temperatures.

The gaseous material inside the separation container is sucked into the second separation tube and discharged. However, it is effective to discharge in a liquid state rather than gas. To achieve this, a condensation rod is formed inside the separation vessel. The condensing rod maintains a low temperature condition on the surface. That is, the high-temperature gas is brought into contact with the low-temperature surface, causing condensation of the gas, and the condensed gas is changed into a droplet state. The material in the form of water droplets flows downward along the condensation rod by gravity. Water droplets falling to the bottom are discharged through the condensate collecting port and the second separation pipe.

[Example 2-3] The present invention relates to a distillation type separator, and in Example 2-1, the condensing rod is formed in a cone or columnar shape.

The material in the state of water droplets is moved downward by gravity, and to secure ease of movement, the condensation rod forms a columnar shape or a cone shape. The cone shape may form an inclined surface in the upper or lower direction. The condensing rod cross section may be formed in a circular or polygonal shape.

 [Example 2-4] The present invention relates to a distillation type separator, and in Example 2-1, a notch 222 formed on the surface of the condensing rod and formed in one or more plurality.

 [Example 2-5] The present invention relates to a distillation separator, and in Example 2-4, the notch takes a straight shape in the vertical direction.

The water droplets formed on the condensation rod move downward by gravity, and for smooth downward movement, a notch in the vertical direction is formed on the surface of the condensation rod. The notch guides the flow of water droplets to enable stable droplet collection.

 [Example 2-6] The present invention relates to a distillation type separator, and in Example 2-1, one side of the condensate collection port is formed in a cone shape.

In order to facilitate collection of water droplets flowing downward along the condensation rod, one side of the condensate collection port forms a cone shape, and the opening diameter of the cone is larger than the condensation rod diameter.

[Example 2-7] The present invention relates to a distillation type separator, and in Example 2-1, a connecting rod 211 connecting the lower portion of the condensation rod and the upper portion of the condensate collection port.

The condensation rod and the condensate collection port are mutually coupled, and to allow the flow of water droplets, they are combined as a plate-shaped connection.

[Example 3-1] The present invention relates to a distillation type separator, and in Example 1-1, it is formed of one or more, and the rotary blade 310 in contact with the inner diameter of the separation vessel.

In order to increase the evaporation efficiency of the liquid, the material flowing down the inner wall of the separation container must be uniformly distributed on the inner wall surface. For the dispersion, a rotating blade is formed inside the separation vessel. One surface of the rotating blade is in close contact with the inner surface of the separation container. The rotating blade is rotated by a power transmission means formed outside the separation container, and the power transmission means is rotated by an electric motor. It can be replaced with an object exhibiting the same purpose and effect as the electric motor.

[Example 3-2] The present invention relates to a distillation type separator, and in Example 3-1, the rotary blade and the inner container are line-contacted.

[Example 3-3] The present invention relates to a distillation type separator, and in Example 3-1, one side of the rotating blade is formed of a soft material.

[Example 3-4] The present invention relates to a distillation separator, and in Example 3-3, the ductile material is formed of rubber.

[Example 3-5] The present invention relates to a distillation type separator, and in Example 3-3, one side of the rotating blade is formed of a brush.

The rotating blade evenly distributes the material inside the separation vessel. To implement this, one surface of the rotating blade should be in even contact with the inner surface of the separation container. Therefore, it is preferable that the rotating blade is formed of a soft material. Specifically, it may be formed of a rubber plate or a brush.

[Example 3-6] The present invention relates to a distillation type separator, and in Example 3-3, one side of the rotating blade includes a detachable means 311 separated and assembled with a blade bracket.

[Example 3-7] The present invention relates to a distillation type separator, and in Example 3-6, the desorption means includes a fastener 312 for fastening one side and the other side of the rotating blade.

[Example 3-8] The present invention relates to a distillation type separator, and in Example 3-6, the desorption means is fastened to one side and the other side of the rotating blade with grooves 313 and protrusions 314; Includes.

[Example 3-9] The present invention relates to a distillation type separator, and in Example 3-6, the desorption means includes a creep 315 formed on the other side of the rotating blade.

When used for a long time, the rotating blades rub against the separation container and wear out. Abrasive rotating blades reduce the evaporation efficiency of the material. Therefore, the rotating blade must be replaced periodically. To improve the replacement efficiency, the rotating blade is formed detachably with the rotating bracket. The detachable means includes a fastener that fastens one side and the other side of the rotating blade. As another embodiment, the rotation blade is fastened by forming grooves and protrusions on one side and the other side. In another embodiment, a creep is formed on the other side of the rotating blade to be fastened.

[Example 3-10] The present invention relates to a distillation type separator, and in Example 3-1, one side is coupled to the rotating blade 310, and the other side is coupled to the blade rotating shaft 321, a blade bracket ( 320).

Rotating blade rotation consists of rotating the blade bracket. The blade bracket is combined with the blade rotation axis. The blade rotation shaft is formed through the separation container.

The blade rotation shaft is rotated by an external power device (322). Therefore, the external power device rotates the blade rotating shaft and the blade bracket, and the rotating blade mounted on the blade bracket rotates. The blade rotation axis is located on the center axis of the separation vessel. In addition, the coupling part of the blade rotation shaft and the separation container is hermetically sealed to prevent gas leakage. For the airtightness, a mechanical seal is used. The external power device is controlled by a control device 323, which controls the rotational speed according to the mixture viscosity. The viscosity of the mixture is measured with a viscometer 324 located inside the mixture vessel.

[Example 4-1] The present invention relates to a distillation type separator, and in Example 1-1, a first collection container 410 communicating with the first separation tube and collecting liquid; And a second collection container 420 communicating with the other side of the second separation tube and collecting fluid.

The mixture quality (the mixture of two or more substances having different boiling points) is separated into a gas and a liquid in a separation container, and then received in the first collection container and the second collection container, respectively. The gaseous substance is converted into a liquid and collected in a second collection container. The fluid is collected in a second collection container.

[Example 4-2] The present invention relates to a distillation type separator, and in Example 4-1, a fluid supply pipe 421 communicating with the second collection container and the second separation pipe.

[Example 4-3] The present invention relates to a distillation type separator, and in Example 4-1, a condenser 430 formed in the fluid supply pipe.

[Example 4-4] The present invention relates to a distillation type separator, and in Example 4-2, a suction pump 440 formed in the fluid supply pipe is included.

The material sucked into the second separation tube forms a gas and liquid state. To improve capture efficiency, the gas must be converted to liquid. To this end, a condenser is installed in the fluid supply pipe between the second separation pipe and the second collection container, and the condenser converts the gaseous state into a liquid state. In order to suck the gas inside the separation container, a suction pump is mounted on the fluid supply pipe. The suction pump forms the internal pressure of the separation vessel as a negative pressure. The condenser may be cooled using constant water, cooling water cooled from a cooling device, or using a teltier element.

[Example 5-1] The present invention relates to a distillation type separator, and in Examples 1-1 to 4-1, a mixture container 500 that receives a mixture and forms a receiving space S2; It includes; a mixture supply pipe 510 communicating between the container and the mixture supply port.

The mixture quality (two or more substances having different boiling points mixed) is accommodated inside the mixture container in a mixed state, and a certain amount of the mixture quality is supplied to the separation container. The mixture quality is supplied through a mixture supply pipe. The mixture supply pipe is equipped with a flow rate control valve 530, and the flow rate control valve controls the amount of supply of the mixture.

[Example 5-2] The present invention relates to a distillation type separator, and in Example 5-1, a preheater 511 formed in the mixture supply pipe and / or the mixture container is included.

If the mixture is preheated in the separation vessel, the separation vessel can heat the mixture using less energy. To solve this, a preheater is fitted. The preheater is formed in a mixture supply pipe and / or a mixture container.

[Example 5-3] The present invention relates to a distillation type separator, and in Example 4-1, one side communicates with the first collection container or the first collection pipe, and the other side with the mixture supply pipe 510. It includes; a circulation pipe 521 in communication.

[Example 5-4] The present invention relates to a distillation type separator, and in Example 5-3, a circulation pump 522 formed in the circulation pipe is included.

[Example 5-5] The present invention relates to a distillation type separator, and in Example 5-1, a direction change valve 523 mounted between the first collection container and the first separation tube; and the mixture container Includes; water level sensor 524 mounted on.

The material discharged through the first separation pipe may include material that has not been separated. In order to separate it, therefore, a material is sucked from the first collection container or the first collection tube, and a circulation tube is installed to re-supply the material to the mixture supply tube. To provide power to the circulation pipe, a circulation pump is mounted. It also includes a control device that measures and recycles the water level in the first collection container.

[Example 6-1] The present invention relates to a distillation type separator, and in Example 1-1, a heat exchanger plate 610 in contact with the outer surface of the separation container.

[Example 6-2] The present invention relates to a distillation type separator, and in Example 6-1, it is in contact with the outer surface of the heat exchanger plate and includes a first heat shield plate 611 to block heat.

[Example 6-3] The present invention relates to a distillation type separator, and in Example 6-1, a cover 620 which accommodates the heat transfer plate and the separation container and has a second heat shield 612 formed therein; It includes.

In order to conduct heat to the separation container, the heat transfer plate may be mounted on the outside or inside the separation container. The heating plate may be heated using electricity or hot water heated in an external boiler. In order to improve the heat concentration of the heat transfer plate contacted to the outside of the separation container, a first blocking plate and / or a second blocking plate is mounted. The first blocking plate is directly coupled to the heat transfer plate. The second blocking plate is attached to the inside of the cover. The cover is formed on the outer periphery of the separation container to prevent external exposure of the heat transfer plate.

[Example 7-1] The present invention relates to a distillation type separator, and in Example 1-1, a pressure control pump 710 formed on the mixture supply pipe 510 and controlling a supply amount of the mixture; 2 the suction pump 440 formed in the fluid supply pipe 421 in communication with the separation pipe 103; a pressure gauge 730 formed in the separation container to measure the internal pressure; receiving the pressure gauge signal, It includes; a pressure controller 720 for controlling the operation of the suction pump 440 and the pressure control pump 710.

 When the pressure is lower than atmospheric pressure, the boiling point of the substance is lowered. The present invention is for heating the mixture at a low temperature by maintaining a pressure lower than the atmospheric pressure in the separation vessel. This can secure economic efficiency by reducing the heating energy of the separation vessel. That is, the pressure inside the separation vessel heated by the heat transfer plate is increased, but the suction pump and the pressure control pump are operated organically to maintain the pressure inside the separation vessel below atmospheric pressure. This is possible because the pressure controller measures the signal of the pressure gauge formed in the separation container in real time and controls the operation of the suction pump and the pressure control pump.

100: separation container 101: mixture supply port
102: first separation tube 103: second separation tube
104: groove 210: condensate collection port
211: connecting rod 220: condensing rod
221: cold and hot supply means 222: notch
310: rotating blade 311: detachable means
312: fastener 313: home
314: projection 315: creep
320: blade bracket 321: blade rotation shaft
323: control device 324: viscometer
410: 1st collection container 420: 2nd collection container
421: fluid supply pipe 430: condenser
440: suction pump 500: mixture container
510: mixture supply pipe 511: preheater
521: circulation pipe 522: circulation pump
523: Direction change valve 524: Water level sensor
530: Flow control valve 610: Heat transfer plate
611: 1st heat shield 612: 2nd heat shield
620: cover 710: pressure control pump
720: Decompression controller 730: Pressure gauge

Claims (7)

In the distillation separator,
Forming a closed space (S1), the separation container 100 is heated;
Mixture supply port 101 formed on the upper side of the separation container ;,
A first separation pipe 102 communicating with the bottom surface of the separation vessel ;,
A distillation separator comprising a; second separation pipe (103) is installed spaced apart from the bottom of the separation vessel.
The method according to claim 1,
Located at the end of the second separation tube, the condensate collecting port 210, the upper portion is open ;,
A condensation rod 220 coupled to the inside of the condensate collection port; a distillation separator comprising a.
The method according to claim 1,
It is formed in one or a plurality, the rotary blade 310 in contact with the inner diameter of the separation container; distillation separator comprising a.
The method according to claim 1,
A first collection container 410 communicating with the first separation tube and collecting liquid;
A distillation type separator comprising: a second collection container 420 communicating with the other side of the second separation tube and collecting fluid.
The method according to any one of claims 1 to 4,
Mixture container 500 to accommodate the mixture and form a receiving space (S2) ;,
Distillation type separator comprising a; mixture supply pipe 510 communicating between the mixture container and the mixture supply port.
The method according to claim 1,
Distillation type separator comprising a; heat transfer plate (610) in contact with the outer surface of the separation vessel.
The method according to claim 1,
A pressure control pump 710 formed on the mixture supply pipe 510 and controlling a supply amount of the mixture;
A suction pump 440 formed in the fluid supply pipe 421 in communication with the second separation pipe 103 ;,
It is formed on the separation vessel to measure the internal pressure pressure meter (730) ;,
Distillation separator comprising; receiving the pressure meter signal, a pressure controller 720 to control the operation of the suction pump 440 and the pressure control pump 710;

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