Low-temperature rapid concentration device and concentration method for stationary source condensable particulate matter condensate

Abstract

The present application relates to the technical field of environmental detection, and particularly discloses a low-temperature rapid concentration device and method for condensable particulate matter (CPM) condensate of a stationary source, which solves the problem that the solute concentration of the CPM condensate collected on site is lower than the detection limit of a detector, and comprises a concentration container for containing a solution to be concentrated, an evaporation promoting assembly acting on the concentration container to cooperatively promote evaporation of the solvent of the solution, and a concentration control assembly connected with the concentration container and the evaporation promoting assembly to control the concentration process. The present application precisely solves the core technical problem that the solute concentration of the CPM condensate collected on site is lower than the detection limit of a detector, and through a controllable concentration multiple, the low-concentration condensate can be concentrated to above the detection limit of the detector, so that subsequent detection can be smoothly performed, the detection result is accurate and reliable, and the practical needs of on-site rapid monitoring of the CPM of a stationary source are met.

Description

Technical Field

[0001] This invention relates to the field of environmental monitoring technology, and in particular to a low-temperature rapid concentration device and method for condensing condensate of stationary source condensable particulate matter. Background Technology

[0002] Condensable particulate matter (CPM) exists in gaseous form in the high-temperature flue gas environment within flues. After being emitted into the atmosphere, it condenses or reacts within a short period of time, forming solid or liquid particles. With the deepening of industrial ultra-low emission transformation, CPM, as an unconventional pollutant, can cause biotoxicity and damage the atmospheric environment due to its ultrafine particulate form and complex composition. Therefore, accurate monitoring of CPM has significant environmental importance and regulatory value.

[0003] Currently, CPM monitoring methods are mainly offline. Among them, the dry impact condensation method is the most widely used offline monitoring method. Its principle is to directly condense the flue gas, which has been filtered for particulate matter, using an ice-water bath. The condensate is collected, concentrated, evaporated, dried, and then weighed for quantitative determination, thus enabling the detection of CPM concentration. However, this method is limited by the sampling site environment. The collected condensate needs to be taken back to the laboratory for concentration. Traditional laboratory constant-temperature water bath concentration methods are extremely inefficient; typically, concentrating the condensate by one-fold at 70℃ takes about 10 hours, severely limiting the timeliness of CPM detection and failing to meet the practical needs of rapid on-site monitoring.

[0004] To address the issues of time-consuming and inconvenient offline monitoring, those skilled in the art have developed various online CPM monitoring devices. For example, invention patent CN120160949A discloses a portable online monitoring device and method for using stationary source condensable particulate matter. This device condenses condensable particulate matter in flue gas into a liquid state using a semiconductor cooling module. After temporary storage in a storage tank, the condensate is transported to various detection cells via a peristaltic pump. The conductivity, pH value, and ammonium ion concentration of the condensate are measured, and the CPM concentration is finally calculated. This achieves online CPM monitoring and portable use, effectively solving the shortcomings of existing online devices, such as large size, heavy weight, and high cost. However, this device does not include a condensate concentration stage and directly detects the condensate collected on-site. The concentration of the solute to be measured in the stationary source CPM condensate collected on-site is extremely low, often below the detection limit of existing detectors, leading to inaccurate detection results or even failure to complete effective detection, making it difficult to meet the requirements for accurate CPM monitoring.

[0005] In the field of concentration technology, existing patents mainly focus on improving concentration efficiency or accuracy, but none are designed specifically for the characteristics of stationary source CPM condensate, thus failing to meet the needs of on-site CPM monitoring. For example, patent CN116850614A discloses a low-temperature concentration process and system for plant extracts, focusing on improving concentration efficiency, while patent CN119804086A discloses a sample concentration method and detection method, focusing on improving concentration accuracy. Neither of these patents considers the core requirements of low solute content in stationary source CPM condensate, the need for rapid on-site concentration, and ensuring no loss of total solute. They cannot solve the technical problem of solute concentration in on-site CPM condensate being below the detection limit of the detector, nor can they be adapted to CPM online monitoring devices to achieve integrated on-site rapid detection. Summary of the Invention

[0006] This invention proposes a low-temperature rapid concentration device and method for stationary source condensable particulate matter condensate, which solves the problem in the prior art that the solute concentration of the on-site CPM condensate is lower than the detection limit of the detector.

[0007] The technical solution of this invention is implemented as follows:

[0008] A low-temperature rapid concentration device for stationary source condensable particulate condensate includes: a concentration container for holding a solution to be concentrated; an evaporation promoting component acting on the concentration container to synergistically promote solvent evaporation in the solution; the evaporation promoting component includes a heating unit for heating the concentration container, a negative pressure unit for evacuating the inside of the concentration container to lower the boiling point of the solvent, and a gas blowing unit for blowing gas into the concentration container to stir the solution and carry out vapor; and a concentration control component connected to the concentration container and the evaporation promoting component for controlling the concentration process; the concentration control component includes at least a first liquid level detection unit for detecting when the solution in the concentration container reaches a preset initial liquid level and a second liquid level detection unit for detecting when the solution reaches a preset termination liquid level, and the concentration control component is configured to: in response to the detection signal of the second liquid level detection unit, control the evaporation promoting component to stop working and initiate a concentrate transfer process.

[0009] The evaporation promoting component is configured such that the rate at which the gas blowing unit blows gas into the concentration container is less than the rate at which the negative pressure unit pumps gas, so as to maintain the negative pressure state in the concentration container and ensure stable low-temperature evaporation conditions.

[0010] The gas induction unit includes a bidirectional peristaltic pump and a filter disposed in the inlet path of the bidirectional peristaltic pump. The bidirectional peristaltic pump is connected to the bottom of the concentration container via a pipeline. The concentration control component is configured to control the bidirectional peristaltic pump to rotate forward to inflate gas or inject liquid, and to rotate in reverse to discharge liquid. The bidirectional peristaltic pump, connected to the bottom of the concentration container via a pipeline, ensures that the inflated gas can fully agitate the solution, making the solution heat evenly, while rapidly carrying away solvent vapor.

[0011] The concentration device also includes a multi-position valve, whose multiple channels are respectively connected to a condensate source, a cleaning fluid source, a concentrate collection container, a waste liquid collection container, and a filter via pipelines; a bidirectional peristaltic pump is connected via pipeline between one channel of the multi-position valve and the concentration container. By switching the channels of the multi-position valve, the device achieves integrated operation of introducing the condensate to be concentrated, introducing the cleaning fluid, transferring the concentrate, and discharging the waste liquid, simplifying the device structure, reducing pipeline connections, and lowering the difficulty of on-site operation.

[0012] The negative pressure unit includes a vacuum pump and an atmospheric balance valve connected between the vacuum pump and the concentration container. The atmospheric balance valve is used to balance the air pressure inside and outside the container before and after concentration, facilitating the introduction of solution and the transfer of concentrate, and preventing sudden changes in air pressure that could cause solute splashing or container damage.

[0013] The concentration control assembly also includes a cooling fan for cooling the solution in the concentration container and a cooling pipeline for transferring the concentrate to a concentration collection container. The cooling pipeline is equipped with a pipeline cooling device. During the transfer of the concentrate, the cooling fan and the pipeline cooling device simultaneously cool the concentrate, reducing vapor loss through rapid cooling and transfer, thus ensuring concentration accuracy.

[0014] The heating unit is a heating wire, which is spirally wound from the bottom to the top of the concentration container. The heating wire provides uniform heating to the entire concentration container, and the winding of the heating wire to the top prevents water vapor from condensing on the pipe wall at the outlet.

[0015] A concentration method using the aforementioned stationary source condensable particulate condensate low-temperature rapid concentration device includes the following steps:

[0016] S1, introduce the solution to be concentrated into the concentration container to the first preset liquid level;

[0017] S2, Initiate the evaporation promotion operation, which includes simultaneously heating the solution in the concentration container, evacuating the inside of the concentration container to lower the boiling point of the solvent, and blowing gas into the concentration container; the rate of gas blowing is less than the rate of evacuation to maintain a negative pressure state inside the concentration container.

[0018] S3, monitor the solution level in the concentration container;

[0019] S4, when the solution level is detected to reach the second preset level, the evaporation promotion operation is stopped and the concentrate transfer operation is performed; the concentrate transfer operation includes cooling the concentration container and transferring the concentrate to the concentrate collection container through the heat dissipation pipeline by a peristaltic pump.

[0020] The introduced gas is clean air that has been filtered and purified; the heating temperature range is 30°C to 80°C.

[0021] After the concentrate transfer operation is performed, a cleaning step is performed, which includes: introducing cleaning solution into the concentration container, heating the concentration container and agitating it with gas, and then discharging the waste liquid into the waste liquid collection container.

[0022] The beneficial effects of this invention are as follows: By adding a low-temperature rapid concentration device after the condensation unit of the condensable particulate matter (CPM) detection device, it facilitates rapid and accurate on-site measurement of CPM concentration. This precisely solves the core technical problem of low solute concentration in stationary source CPM condensate collected on-site, which is below the detector's detection limit. Through a controllable concentration factor, the low-concentration condensate can be concentrated to above the detector's detection limit, ensuring smooth subsequent testing and accurate, reliable results, thus meeting the actual needs of rapid on-site monitoring of stationary source CPM.

[0023] This invention achieves rapid low-temperature evaporation of solvents through the synergistic action of a heating unit, a negative pressure unit, and a gas induction unit. The negative pressure unit lowers the solvent's boiling point by creating a vacuum, allowing the heating unit to operate at a lower temperature, effectively preventing high-temperature damage to the solute and ensuring that the total amount of solute to be measured does not decrease. The gas induction unit introduces gas into the solution, which not only acts as a stirrer to prevent solute precipitation but also increases the gas-liquid contact area and rapidly carries the evaporated vapor away from the solution surface, thereby significantly improving concentration efficiency.

[0024] The concentration control component precisely controls the start and end points of concentration through a first liquid level detection unit and a second liquid level detection unit. When the solution is concentrated to the preset termination liquid level, the evaporation promotion operation is immediately stopped and a concentrate transfer process, including heat dissipation and transfer, is initiated. This effectively reduces the continued evaporation of solvent due to residual heat, ensuring the accuracy of the concentrated volume and achieving high-precision proportional concentration. Therefore, this invention solves the technical problems of low concentration efficiency, poor concentration accuracy, and difficulty in maintaining a constant total solute amount during concentration in the prior art, providing reliable technical support for rapid and accurate on-site detection of condensable particulate matter from stationary sources. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the fixed-source condensable particulate condensate low-temperature rapid concentration device of the present invention.

[0027] In the diagram: 1. Exhaust gas buffer bottle, 2. Vacuum pump, 3. Atmospheric balance valve, 4. Container holder, 5. Concentration container, 6. Heating wire, 7. Cooling fan, 8. Sealing cap, 9. High liquid level sensor, 10. Low liquid level sensor, 11. Temperature sensor, 12. Two-way peristaltic pump, 13. Multi-position valve, 14. Filter, 15. Cleaning fluid source, 16. Waste liquid collection container, 17. Concentrate collection container, 18. Piping cooling device, 19. Condensate source. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The low-temperature rapid concentration device and method for stationary source condensable particulate matter condensate provided in this invention are mainly applied to the field of on-site detection of condensable particulate matter in flue gas emitted from stationary pollution sources. In the CPM condensate collected on-site, the concentration of the solute to be measured is usually lower than the detection limit of the instrument. Therefore, it is necessary to rapidly and accurately concentrate the solution without losing the total amount of solute to increase the solute concentration and meet the requirements for accurate detection.

[0030] like Figure 1 As shown, the device includes a concentration container 5, an evaporation promotion component, and a concentration control component.

[0031] The concentration container 5 is used to hold the solution to be concentrated. The concentration container 5 is a quartz glass tube with an open top, a small hole at the bottom, and a groove on the side. The top of the concentration container 5 is equipped with a sealing cap 8 to achieve a seal. The concentration container 5 is placed in the container fixing frame 4.

[0032] The evaporation promoting component acts on the concentration container 5 to synergistically promote the rapid evaporation of water in the solution. The evaporation promoting component includes a heating unit for heating the concentration container 5, a negative pressure unit for evacuating the inside of the concentration container 5 to lower the boiling point of water, and a gas blowing unit for blowing gas into the concentration container 5 to stir the solution and carry out water vapor.

[0033] The concentration control assembly is connected to the concentration container 5 and the evaporation promoting assembly for precise control of the entire concentration process. The concentration control assembly includes at least a first liquid level detection unit for detecting when the solution in the concentration container 5 reaches a preset initial liquid level and a second liquid level detection unit for detecting when the solution reaches a preset final liquid level. The concentration control assembly is configured to: in response to a detection signal from the second liquid level detection unit, immediately control the evaporation promoting assembly to stop operating and initiate a concentrate transfer process that includes heat dissipation and transfer.

[0034] The three components work together, combining low-temperature heating, bubbling and stirring, and negative pressure evaporation to achieve rapid evaporation of water at 30-80°C while keeping the total solute amount constant. At the same time, precise liquid level control and rapid transfer ensure the accuracy of the concentrated volume, thus solving the problems of low concentration efficiency, poor accuracy, and difficulty in ensuring no solute loss in existing technologies.

[0035] In this embodiment, the evaporation promoting component is configured such that the rate at which the gas blowing unit blows gas into the concentration container 5 is less than the rate at which the negative pressure unit pumps gas. This configuration ensures that a stable negative pressure is maintained inside the concentration container 5 while continuous gas blowing and steam removal occur, thereby continuously lowering the boiling point of water and achieving efficient evaporation under relatively low temperature conditions. If the gas blowing rate is greater than the pumping rate, it is difficult to form or maintain an effective negative pressure inside the container.

[0036] In this embodiment, the gas induction unit includes a bidirectional peristaltic pump 12 and a filter 14 disposed in the air inlet path of the bidirectional peristaltic pump 12. The bidirectional peristaltic pump 12 is connected to the bottom of the concentration container 5 via a pipeline. The concentration control assembly is configured to control the bidirectional peristaltic pump 12 to rotate forward to infuse gas or inject liquid into the concentration container 5, and to rotate in reverse to discharge liquid from the concentration container 5. By infusing gas from the bottom of the container through the bidirectional peristaltic pump 12, effective stirring of the solution can be achieved, preventing solute precipitation. At the same time, the inflated air bubbles increase the gas-liquid contact area, which is beneficial for the evaporation of moisture and the removal of vapor. The filter 14 is used to purify the inflated air, removing particulate matter, moisture, oil, and other gaseous components that may interfere with detection, ensuring that clean air is inflated and avoiding sample contamination. In addition to using a bidirectional peristaltic pump, the gas induction unit can also employ other devices that can provide a stable and adjustable airflow, such as a combination of a gas pump and a flow control valve.

[0037] In this embodiment, the device further includes a multi-position valve 13. Multiple channels of the multi-position valve 13 are respectively connected via pipelines to a condensate source 19, a cleaning fluid source 15, a concentrate collection container 17, a waste liquid collection container 16, and a filter 14. A bidirectional peristaltic pump 12 is connected via a pipeline between one channel of the multi-position valve 13 and the concentrate container 5. By controlling the switching of different channels of the multi-position valve 13, combined with the forward and reverse rotation of the bidirectional peristaltic pump 12, multiple fluid path controls such as condensate injection, clean air blowing, concentrate discharge, cleaning fluid injection, and waste liquid discharge can be flexibly achieved, resulting in high integration and convenient operation. In a specific embodiment, for ease of description, each liquid storage unit connected via pipeline can be referred to by its functional abbreviation; for example, the condensate source 19 is called a condensate storage bottle, the cleaning fluid source 15 is called a cleaning fluid storage bottle, the concentrate collection container 17 is called a concentrate collection bottle, and the waste liquid collection container 16 is called a waste liquid collection bottle.

[0038] In this embodiment, the negative pressure unit includes a vacuum pump 2 and an atmospheric balance valve 3 connected between the vacuum pump 2 and the concentration container 5. The vacuum pump 2 is used to extract the gas from the concentration container 5, on the one hand to create and maintain a negative pressure environment to lower the boiling point of water, and on the other hand to quickly extract the water vapor generated by evaporation to prevent it from condensing and flowing back into the container. The atmospheric balance valve 3 is installed on the pipeline between the concentration container 5 and the vacuum pump 2. Its function is to connect to the atmosphere when the concentration is completed and the liquid is ready to be discharged, so that the internal pressure of the concentration container 5 can be restored to normal, facilitating the smooth discharge of the liquid. The exhaust port of the vacuum pump 2 is connected to a tail gas buffer bottle 1 to buffer and condense any small amount of liquid droplets that may be carried out, reducing environmental pollution.

[0039] In this embodiment, the concentration control component also includes a cooling fan 7 for cooling the solution inside the concentration container 5, and a heat dissipation pipe for transferring the concentrate to the concentrate collection container 17. The heat dissipation pipe is equipped with a pipe heat dissipation device 18. When the concentrate reaches the preset termination level and the evaporation promotion operation stops, the concentration container 5 and its internal solution still retain residual heat, which can cause water to continue evaporating, further reducing the volume of the concentrate and affecting the concentration accuracy. At this time, immediately turning on the cooling fan 7 to force-cool the outer wall of the concentration container 5 can quickly lower the solution temperature and suppress residual heat evaporation. Simultaneously, a heat dissipation pipe 18 is installed on the pipe that discharges the concentrate, for example, using a metal coil air-cooled or water-cooled structure, to cool the concentrate during the transfer process, further reducing steam loss during transfer. This combination of rapid cooling and transfer measures is an important guarantee for achieving high-precision proportional concentration.

[0040] In this embodiment, the heating unit is a heating wire 6. The heating wire 6 is spirally wound from the bottom of the concentration container 5 to the top of the concentration container 5. This winding method makes the heating of the concentration container more uniform and avoids local overheating. The heating wire 6 is wound all the way to near the top of the container, which helps to prevent water vapor from condensing and flowing back in the inner wall of the upper part of the container or in the outlet pipe, ensuring that the evaporated water can be effectively carried away. The power of the heating wire 6 is controlled in a closed loop by the concentration control component based on the signal fed back by the temperature sensor 11 to maintain the solution at a constant temperature within a set low temperature range (e.g., 30~80°C).

[0041] In this embodiment, the first liquid level detection unit is a high liquid level sensor 9, and the second liquid level detection unit is a low liquid level sensor 10. The high liquid level sensor 9 is used to detect whether the condensate stock has reached a preset initial volume, i.e., the first preset liquid level. The low liquid level sensor 10 is used to detect whether the concentration process has reduced the liquid level to a preset target volume, i.e., the second preset liquid level. The concentration control component also includes a control unit, which is not shown separately in the figure. This control unit typically includes a processor, such as a PLC or microcontroller, a memory, and drive circuits and signal receiving circuits electrically connected to the processor. The signal output terminals of the high liquid level sensor 9 and the low liquid level sensor 10 are connected to this control unit. The control unit controls the condensate injection to stop according to the signal from the high liquid level sensor 9, and controls the evaporation promotion component to stop and triggers heat dissipation and drainage operations according to the signal from the low liquid level sensor 10. At the same time, it also coordinates and controls all actuators such as the heating wire 6, vacuum pump 2, atmospheric balance valve 3, bidirectional peristaltic pump 12, multi-position valve 13, and cooling fan 7 to work according to a predetermined program.

[0042] The present invention also provides a concentration method using the above-described stationary source condensable particulate condensate low-temperature rapid concentration device. The method includes the following steps:

[0043] S1, the solution to be concentrated is introduced into the concentration container 5 to the first preset liquid level. Specifically, the control unit controls the atmospheric balance valve 3 to open to balance the air pressure inside and outside the container, controls the multi-position valve 13 to switch to the channel connecting to the condensate source 19, and controls the bidirectional peristaltic pump 12 to rotate forward, pumping the condensate from the bottom of the container into the concentration container 5. When the high liquid level sensor 9 detects that the liquid level has reached the first preset liquid level, it sends a signal to the control unit, which then controls the bidirectional peristaltic pump 12 to stop, completing the volumetric liquid injection. Optionally, after the liquid injection is completed, the bidirectional peristaltic pump 12 can be controlled to continue rotating forward, and the multi-position valve 13 can be switched to the channel connecting to the filter 14 to introduce clean air into the container for a period of time to purge the condensate and remove any potentially dissolved interfering gases.

[0044] S2, Initiate evaporation promotion operation. The control unit controls the heating wire 6 to start heating, controls the vacuum pump 2 to start, and controls the bidirectional peristaltic pump 12 to rotate forward at a low rate. Simultaneously, the multi-position valve 13 switches to the channel connecting to the filter 14. At this time, the evaporation promotion operation is performed simultaneously: the heating wire 6 heats the solution at a low temperature, controlled within the range of 30~80℃; the vacuum pump 2 evacuates the inside of the concentration container 5, forming and maintaining a negative pressure, thereby lowering the boiling point of water; the bidirectional peristaltic pump 12 slowly and uniformly blows clean air purified by the filter 14 into the solution from the bottom of the container. The rate of air blowing is set to be less than the pumping rate of the vacuum pump 2 to ensure that the required negative pressure is maintained inside the container. The blown air serves a dual purpose: stirring the solution and quickly removing water vapor from the evaporation interface.

[0045] S3 monitors the solution level in the concentration container 5. During the concentration process, the low-level sensor 10 continuously monitors changes in the solution level.

[0046] S4, when the solution level is detected to have reached the second preset level, the evaporation promotion operation is stopped, and the concentrate transfer operation is performed. Specifically, when the low level sensor 10 detects that the liquid level has dropped to the second preset level, it sends a signal to the control unit. The control unit immediately controls the heating wire 6 to stop heating, the vacuum pump 2 to stop working, and the bidirectional peristaltic pump 12 to stop blowing air, thereby terminating evaporation. Subsequently, the control unit turns on the cooling fan 7 to cool the concentration container 5 and controls the atmospheric balance valve 3 to open so that the container returns to normal pressure. Next, the control unit controls the multi-position valve 13 to switch to the channel connecting to the concentrate collection container 17 and controls the bidirectional peristaltic pump 12 to rotate in reverse, quickly transferring the concentrate to the concentrate collection container 17 through the heat dissipation pipe. The cooling fan 7 and the heat dissipation pipe 18 work together to minimize the volume loss of concentrate due to residual heat.

[0047] In a preferred embodiment, an automatic cleaning step can be performed after the concentrate transfer operation to allow for device reuse. The cleaning step includes: first, introducing cleaning fluid into the concentrate container 5 to a predetermined level, similar to step S1, except that the multi-position valve 13 is switched to connect to the cleaning fluid source 15. Then, the introduced cleaning fluid is heated and agitated with gas, similar to step S2 but typically for a shorter time, to ensure the cleaning fluid fully dissolves any residual solutes on the container wall. Finally, the waste liquid containing residue is discharged into the waste liquid collection container 16, similar to the concentrate discharge process. To further prepare for the next use, a rapid drying step can also be performed: after draining the cleaning fluid, the heating wire 6 is controlled to heat, and the bidirectional peristaltic pump 12 is controlled to rotate at high speed in the forward direction to blow in a large amount of clean air, while the vacuum pump 2 is simultaneously controlled to operate, rapidly drying the moisture in the container.

[0048] In summary, this invention, through a synergistic evaporation mechanism of heating, negative pressure, and bubbling stirring, as well as a precise control and rapid cooling transfer strategy based on a liquid level sensor, successfully achieves low-temperature, rapid, and high-precision concentration of CPM condensate while ensuring that the total amount of solute to be measured remains unchanged. This provides key technical support for the accurate on-site detection of condensable particulate matter from stationary sources.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low-temperature rapid concentration device for stationary source condensable particulate condensate, characterized in that, include: Concentration container (5), which is used to hold the solution to be concentrated; An evaporation promoting component is applied to a concentration container (5) to synergistically promote the solvent evaporation of the solution. The evaporation promoting component includes a heating unit for heating the concentration container (5), a negative pressure unit for evacuating the inside of the concentration container (5) to reduce the boiling point of the solvent, and a gas blowing unit for blowing gas into the concentration container (5) to stir the solution and carry out vapor. A concentration control component, which is connected to a concentration container (5) and an evaporation promotion component, is used to control the concentration process. The concentration control component includes at least a first liquid level detection unit for detecting that the solution in the concentration container (5) has reached a preset initial liquid level and a second liquid level detection unit for detecting that the solution has reached a preset termination liquid level. The concentration control component is configured to: in response to the detection signal of the second liquid level detection unit, control the evaporation promotion component to stop working and start the concentrate transfer process.

2. The low-temperature rapid concentration device for stationary source condensable particulate condensate according to claim 1, characterized in that, The evaporation promotion component is configured such that the rate at which the gas is blown into the concentration container (5) by the gas blowing unit is less than the rate at which the gas is pumped out by the negative pressure unit, so as to maintain the negative pressure state inside the concentration container (5).

3. The low-temperature rapid concentration device for stationary source condensable particulate condensate according to claim 1 or 2, characterized in that, The gas inlet unit includes a bidirectional peristaltic pump (12) and a filter (14) disposed on the inlet path of the bidirectional peristaltic pump (12). The bidirectional peristaltic pump (12) is connected to the bottom of the concentration container (5) via a pipeline. The concentration control assembly is configured to control the bidirectional peristaltic pump (12) to rotate in the forward direction to inlet gas or inject liquid, and to rotate in the reverse direction to discharge liquid.

4. The low-temperature rapid concentration device for stationary source condensable particulate condensate according to claim 3, characterized in that, It also includes a multi-position valve (13), whose multiple channels are respectively connected to the condensate source (19), the cleaning liquid source (15), the concentrate collection container (17), the waste liquid collection container (16) and the filter (14) via pipelines; a two-way peristaltic pump (12) is connected between one channel of the multi-position valve (13) and the concentrate container (5) via pipelines.

5. The low-temperature rapid concentration device for stationary source condensable particulate condensate according to claim 1 or 4, characterized in that, The negative pressure unit includes a vacuum pump (2) and an atmospheric balance valve (3) connected between the vacuum pump (2) and the concentration container (5).

6. The low-temperature rapid concentration device for stationary source condensable particulate condensate according to claim 1, characterized in that, The concentration control assembly also includes a cooling fan (7) for cooling the solution in the concentration container (5) and a cooling pipe for transferring the concentrate to the concentration collection container (17).

7. The low-temperature rapid concentration device for stationary source condensable particulate condensate according to claim 1, characterized in that, The heating unit is a heating wire (6), which is spirally wound from the bottom of the concentration container (5) to the top of the concentration container (5).

8. A concentration method using a low-temperature rapid concentration device for stationary source condensable particulate condensate as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1, introduce the solution to be concentrated into the concentration container (5) to the first preset liquid level; S2, start the evaporation promotion operation, which includes simultaneously heating the solution in the concentration container (5), evacuating the inside of the concentration container (5) to reduce the boiling point of the solvent, and blowing gas into the concentration container (5); the rate of blowing gas is less than the rate of evacuation to maintain the negative pressure state inside the concentration container (5). S3, monitor the solution level in the concentration container (5); S4, when the solution level is detected to reach the second preset level, stop the evaporation promotion operation and perform the concentrate transfer operation; the concentrate transfer operation includes cooling the concentration container (5) and transferring the concentrate to the concentrate collection container (17) through the heat dissipation pipeline by the peristaltic pump (12).

9. The concentration method according to claim 8, characterized in that, The gas blown in is clean air purified by a filter (14); the heating temperature range is 30°C to 80°C.

10. The concentration method according to claim 8, characterized in that, After performing the concentrate transfer operation, a cleaning step is performed, which includes: introducing cleaning solution into the concentration container (5), heating the concentration container (5) and blowing gas in for stirring, and then discharging the waste liquid into the waste liquid collection container (16).

Images