CN114917720B - Trace odor enrichment device - Google Patents

Abstract

The application relates to the technical field of environmental remediation and detection, provides a trace odor enrichment device, include: the device comprises an air inlet unit, a blower unit, a dewatering condensing unit and an adsorption unit, wherein the blower unit is arranged at the rear end of the air inlet unit, and the dewatering condensing unit is respectively connected with the blower unit and the adsorption unit; the adsorption unit comprises a liquid nitrogen condensing box and an adsorption column arranged in the liquid nitrogen condensing box, a pipeline system is arranged in the adsorption unit, two ends of the adsorption column are connected with the water removal condensing unit by the pipeline system, adsorbed odor is discharged, and an air valve system for controlling the air valve system to open and stop is arranged on the pipeline system. The odor firstly passes through the dewatering condensing unit to remove the vapor in the odor, so that the interference of the vapor on the adsorption effect is avoided, and then the adsorption and enrichment are carried out through the adsorption unit, and the liquid nitrogen condensing box realizes the low-temperature adsorption of the odor, so that the condensation dewatering and the low-temperature adsorption of the odor are realized, and the adsorption efficiency of trace components in the odor is improved.

Description

A trace odor enrichment device

Technical field

The present application belongs to the technical field of environmental management and detection, and more specifically, relates to a trace odor enrichment device.

Background technique

Among all environmental pollution factors, air pollution has the characteristics of rapid diffusion, wide range of influence, and difficulty in treatment, especially the odor emitted around garbage transfer sites, food waste treatment plants, etc., which exists during the analysis, detection and treatment process. Technical limitations such as low detection threshold and large odor. Some odor components will cause serious malodor when the content is extremely low, which poses great technical challenges to the analysis, detection and targeted treatment of odor components.

For the treatment of malodorous gases, the key lies in the accurate determination of components. To determine the trace components in the malodorous gas, corresponding enrichment technology is required to increase the concentration of the components to be detected. Most of the enrichment methods in the prior art are adsorption enrichment, but most of the trace components emitting odor are unorganized emissions. Therefore, during the enrichment process, there are problems such as long enrichment time, difficulty in determining the concentration multiple, and poor enrichment efficiency. Low and long time, which is not conducive to the enrichment and analysis of trace components.

In addition, malodorous gases containing trace components often also contain a large amount of water vapor. After water vapor enters the adsorbent material, it occupies the adsorption sites of trace components in the odor, resulting in a reduction in the adsorption capacity of the adsorbent material for trace components and affecting the enrichment of trace components. Since the concentration of trace components is too low, in order to improve its adsorption efficiency, the adsorption unit needs to be kept in the lowest possible temperature environment. However, low-temperature environments will also cause the liquefaction or desublimation of water vapor in the odor to be treated, which can easily cause structural damage to the adsorbent material. Therefore, how to solve the interference of water vapor in the odor to the enriched gas is an urgent problem that needs to be solved.

Contents of the invention

The purpose of the embodiments of the present application is to provide a trace odor enrichment device to solve the technical problem in the prior art that water vapor affects the adsorption and enrichment effect during the trace odor enrichment process.

In order to achieve the above purpose, the technical solution adopted in this application is to provide a trace odor enrichment device, which includes: an air intake unit, a blower unit, a water removal condensation unit and an adsorption unit. The blower unit is located in the inlet. At the rear end of the gas unit, the water removal condensation unit is connected to the blower unit and the adsorption unit respectively; the adsorption unit includes a liquid nitrogen condensation box and an adsorption column located in the liquid nitrogen condensation box. The adsorption unit There is a piping system inside, which connects both ends of the adsorption column to the water removal and condensation unit and discharges the adsorbed odor. The piping system is equipped with a valve to control its passage. Valve system.

In one embodiment, there are at least two liquid nitrogen condensation boxes, and the adsorption columns are installed in each liquid nitrogen condensation box. Both ends of each adsorption column are connected through the pipeline system.

In one embodiment, the air intake unit includes an air collection port, and a dust filter and a gas flow meter are provided at the rear end of the air collection port.

In one embodiment, the blower unit includes a first blower, a second blower and a third blower. The first blower and the second blower are arranged at the rear end of the air intake unit. The third blower It is arranged at the rear end of the adsorption unit and connected to the pipeline system.

In one embodiment, the water removal condensation unit includes a first refrigeration fin group and a second refrigeration fin group. A plurality of refrigeration fins in the first refrigeration fin group and the second refrigeration fin group are arranged in parallel and the cooling The pieces are fusiform.

In one embodiment, the water removal and condensation unit further includes a liquid guide plate, a first Y-shaped gas pipe and a second Y-shaped gas pipe, and the liquid guide plate is disposed between the first refrigeration unit and the second refrigeration unit. Between the fin groups, one end of the first refrigeration fin group is connected to the first blower, and the other end is connected to the first Y-shaped gas pipe. One end of the second refrigeration fin group is connected to the second blower, and the other end is connected to the second blower. Connected to the second Y-shaped gas pipeline, the first Y-shaped gas pipeline and the second Y-shaped gas pipeline are both connected to the pipeline system, and the first Y-shaped gas pipeline and the second Y-shaped gas pipeline The gas transmission pipes are connected with each other, a first three-way air valve is provided at the intersection of the first Y-shaped gas transmission pipe, and a second three-way air valve is provided at the intersection of the second Y-shaped gas transmission pipe.

In one embodiment, a water storage tank is provided at the bottom of the water removal and condensation unit.

In one embodiment, the pipeline system has a mesh-shaped pipeline structure, and the two adsorption columns are a first adsorption column and a second adsorption column respectively and are respectively arranged on the middle pipe of the mesh-shaped pipeline structure. , the two vertices of the eye-shaped pipeline structure are connected to the corresponding first Y-shaped gas pipeline and the second Y-shaped gas pipeline respectively.

In one embodiment, the air valve system includes a first air valve, a second air valve, a third air valve, a fourth air valve, a fifth air valve, a sixth air valve, a seventh air valve, and an eighth air valve. Valve; the first air valve and the second air valve are arranged on the middle pipe at both ends of the first adsorption column, and the third air valve and the fourth air valve are arranged on the pipe between the first adsorption column and the second adsorption column. On the top, the fifth air valve and the sixth air valve are arranged on the intermediate pipes at both ends of the second adsorption column, and the seventh and eighth air valves are respectively arranged on the other two vertices of the eye-shaped pipeline structure. , the third blower is connected to the pipe between the seventh air valve and the eighth air valve.

In one embodiment, each air valve of the air valve system and the first three-way air valve and the second three-way air valve are controlled to open and close through a PLC system.

The beneficial effect of the trace odor enrichment device provided by this application is: when the odor that needs to be enriched enters through the air intake unit, it first passes through the water removal and condensation unit to remove the water vapor in the odor under the power of the blower unit. , turning the odor into a dry odor to avoid water vapor interfering with the adsorption effect, and then passing through the adsorption unit for adsorption and enrichment, and the liquid nitrogen condensation box realizes low-temperature adsorption of the odor; thus realizing the odor to be enriched Condensation water removal and low-temperature adsorption improve the adsorption efficiency of trace components in odor, and efficient adsorption of different components of odor can be achieved by replacing different adsorption columns.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the purpose of the present application. For some embodiments, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of the overall structure of the trace odor enrichment device provided by the embodiment of the present application;

Figure 2 is a schematic diagram of the parallel flow direction of air flow and each air valve in the trace odor enrichment device provided by the embodiment of the present application;

Figure 3 is a schematic diagram of the gas flow in the de-icing mode in the trace odor enrichment device provided by the embodiment of the present application;

Figure 4 is a schematic diagram of the air flow in the trace odor enrichment device provided by the embodiment of the present application to realize the series flow direction.

Among them, each figure in the figure is marked with:

1. Air inlet unit; 11. Air collection port; 12. Dust filter; 13. Gas flow meter; 2. Blower unit; 21. First blower; 22. Second blower; 23. Third blower; 3. Water removal Condensing unit; 311, first refrigeration plate group; 312, second refrigeration plate group; 321, first Y-shaped gas pipe; 322, second Y-shaped gas pipe; 323, first three-way valve; 324, second and third Ventilation valve; 33. Liquid guide plate; 34. Water storage tank; 4. Adsorption unit; 411. First adsorption column; 412. Second adsorption column; 421. First liquid nitrogen condensation tank; 422. Second liquid nitrogen condensation tank ; 5. Air valve system; 51. First air valve; 52. Second air valve; 53. Third air valve; 54. Fourth air valve; 55. Fifth air valve; 56. Sixth air valve; 57 , the seventh air valve; 58. the eighth air valve.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clear, this application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It should be understood that the terms "length", "width", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "top" The orientations or positional relationships indicated by , "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply what is meant. Devices or elements must have a specific orientation, be constructed and operate in a specific orientation and therefore are not to be construed as limiting.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, "plurality" means two or more than two, unless otherwise explicitly and specifically limited.

As shown in Figures 1 to 4, a trace odor enrichment device provided by the embodiment of the present application will now be described. The trace odor enrichment device includes: air intake unit 1, blower unit 2, water removal and condensation unit 3 and adsorption unit 4. Among them, the blower unit 2 is located at the rear end of the air inlet unit 1. The air inlet unit 1 is used to communicate with the source of odor to be enriched. The blower unit 2 is used to provide power for the flow of odor; the water removal and condensation unit 3 They are respectively connected to the blower unit 2 and the adsorption unit 4; the blower unit 2 first introduces the odor into the water removal and condensation unit 3 to remove the water vapor in the odor, and then the dried odor enters the adsorption unit 4 for adsorption and enrichment. , the residual gas after enrichment is discharged.

In this embodiment, the water removal condensation unit 3 and the adsorption unit 4 are both arranged in a sealed box. The blower unit 2 and the air intake unit 1 are both arranged outside the box.

Among them, the adsorption unit 4 includes a liquid nitrogen condensation box and an adsorption column located in the liquid nitrogen condensation box. The liquid nitrogen condensation box is used to cool the adsorption column to achieve low-temperature adsorption and enrichment. The adsorption column is equipped with adsorption materials to achieve the enrichment of corresponding trace amounts of odor. The adsorption column replaces the corresponding adsorption material according to different odors.

In this embodiment, the adsorption unit 4 is provided with a pipeline system. The pipeline system connects both ends of the adsorption column to the water removal and condensation unit 3 and discharges the adsorbed odor. The odor after the water removal and condensation unit 3 is dried is The gas enters the adsorption column through the pipeline system to complete the adsorption, and then the residual odor is discharged. In this embodiment, the pipeline system is provided with a gas valve system 5 for controlling its passage, thereby controlling the working state of the adsorption column.

In this embodiment, there are at least two liquid nitrogen condensation boxes, and each liquid nitrogen condensation box is equipped with an adsorption column. Both ends of each adsorption column are connected through a pipeline system. Specifically, the two liquid nitrogen condensation tanks are respectively the first liquid nitrogen condensation tank 421 and the second liquid nitrogen condensation tank 422. The adsorption column in the first liquid nitrogen condensation tank 421 is the first adsorption column 411, and the second liquid nitrogen condensation tank is the first adsorption column 411. The adsorption column in the box 422 is the second adsorption column 412 . In this embodiment, the first adsorption column 411 and the second adsorption column 412 are connected in parallel through a pipeline system.

In this embodiment, the air inlet unit 1 has a bell mouth structure. The air inlet unit 1 includes an air collection port 11. A dust filter 12 and a gas flow meter 13 are provided at the rear end of the air collection port 11. The dust filter 12 is used to filter odor. Large particle impurities in the air, the air flow meter is used to measure the flow of odor to be enriched. The air collection port 11 is a bell mouth, which facilitates the odor to be inhaled by the blower unit 2. In this embodiment, the source of odor to be enriched may be a space that generates odor, such as a garbage plant.

In this embodiment, the blower unit 2 includes a first blower 21, a second blower 22 and a third blower 23. The first blower 21, the second blower 22 and the third blower 23 can all work independently. The first blower 21 and the second blower 22 are disposed at the rear end of the air intake unit 1, and the third blower 23 is disposed at the rear end of the adsorption unit 4 and connected to the piping system. The first blower 21, the second blower 22 and the third blower 23 are used to maintain the pressure difference so that the odor can flow.

In this embodiment, the water removal condensation unit 3 includes a first refrigeration fin group 311 and a second refrigeration fin group 312. Multiple refrigeration fins in the first refrigeration fin group 311 and the second refrigeration fin group 312 are arranged in parallel and the refrigeration fins are arranged in parallel. It is in the shape of a spindle. This arrangement is to increase the contact area between the odor and the refrigeration fins, thereby improving the water vapor removal efficiency. The refrigeration piece is electrically connected to the external power supply. Generally, semiconductor refrigeration elements are used.

In this embodiment, the water removal condensation unit 3 also includes a liquid guide plate 33, a first Y-shaped gas pipe 321 and a second Y-shaped gas pipe 322. The liquid guide plate 33 is disposed between the first refrigeration plate group 311 and the second refrigeration plate group. Between the fin sets 312, the function of the liquid guide plate 33 is to collect the water dripping after condensation in the first refrigeration fin set 311, prevent it from dripping on the second refrigeration fin set 312, and then discharge the collected water into the removal chamber. Bottom of water condensation unit 3.

Among them, one end of the first refrigeration fin group 311 is connected to the first blower 21, and the other end is connected to the first Y-shaped gas pipe 321. One end of the second refrigeration fin group 312 is connected to the second blower 22, and the other end is connected to the second Y-shaped gas pipe 321. The first Y-shaped gas pipe 321 and the second Y-shaped gas pipe 322 are connected to the pipeline system, and the first Y-shaped gas pipe 321 and the second Y-shaped gas pipe 322 are connected to each other. A first three-way air valve 323 is provided at the intersection of the Y-shaped gas pipeline 321, and a second three-way air valve 324 is provided at the intersection of the second Y-shaped gas pipeline 322. The first three-way valve 323 and the second three-way valve 324 are used to control the flow direction of the odor gas flow.

The first Y-shaped gas pipe 321 and the second Y-shaped gas pipe 322 each have three interfaces. The first interfaces of the first Y-shaped gas pipe 321 and the second Y-shaped gas pipe 322 are connected with the channel where the refrigeration plate is located. The second interface of the Y-shaped gas pipe 321 is connected to the pipeline system, the second interface of the second Y-shaped gas pipe 322 is connected to the pipeline system, the third interface of the first Y-shaped gas pipe 321 and the second Y-shaped gas pipe 322 The third interfaces are connected with each other; and the first three-way valve 323 and the second three-way valve 324 are used to control the airflow to flow through the first interface and the second interface, or flow through the first interface and the third interface.

In this embodiment, a water storage tank 34 is provided at the bottom of the water removal and condensation unit 3, and the water storage tank 34 is used to collect water that drips after condensation.

In this embodiment, since there are two adsorption columns spaced apart, the pipeline system has a mesh-shaped pipeline structure. As shown in Figure 2, the mesh-shaped pipeline structure is tilted at 90°, in which each adsorption column is arranged at an angle of 90°. The columns are respectively arranged on the middle pipe of the mesh-shaped pipeline structure, and the two vertices of the mesh-shaped pipeline structure are respectively connected with the corresponding first Y-shaped gas pipeline 321 and the second Y-shaped gas pipeline 322; the third blower 23 is arranged in the middle of the outer pipe of the eye-shaped pipe structure away from the water removal condensation unit 3. The eye-shaped pipeline structure is used to realize the parallel connection of each adsorption column. Of course, the number of intermediate pipes in the mesh-type pipe structure increases according to the number of adsorption columns.

In this embodiment, the number of air valves in the air valve system 5 is set according to the mesh-shaped pipeline structure. Specifically, the air valve system 5 includes a first air valve 51, a second air valve 52, a third air valve 53, a fourth air valve 54, a fifth air valve 55, a sixth air valve 56, a seventh air valve 57 and Eighth air valve 58. As shown in Figures 2 and 4, the first air valve 51 and the second air valve 52 are provided on the intermediate pipes at both ends of the first adsorption column 411, and the third air valve 53 and the fourth air valve 54 are provided on the first adsorption column 411. On the pipe between the first adsorption column 411 and the second adsorption column 412, the fifth air valve 55 and the sixth air valve 56 are arranged on the middle pipe at both ends of the second adsorption column 412, and the seventh air valve 57 and the eighth air valve 57 are arranged on the pipe between the first adsorption column 411 and the second adsorption column 412. The valves 58 are respectively arranged at the other two vertices of the mesh-shaped pipeline structure, and the third blower 23 is connected to the pipeline between the seventh air valve 57 and the eighth air valve 58 . The function of the gas valve system 5 is to realize the series or parallel connection of the first adsorption column 411 and the second adsorption column 412, so that the state can be changed according to the enrichment demand.

In this embodiment, each air valve and the three-way air valve are electronically controlled valves. Each air valve of the air valve system 5 and the first three-way air valve 323 and the second three-way air valve 324 are controlled to open and close through the PLC system. The PLC The system is an existing control system that can accurately control the opening and closing of each air valve and three-way air valve.

In the first working mode of this embodiment, as shown in Figure 2, except for the seventh air valve 57 which is in the closed state, the other air valves are in the open state, and the first adsorption column 411 and the second adsorption column 412 are in a parallel state. , at this time, the first adsorption column 411 and the second adsorption column 412 can enrich the odor at the same time. This state is suitable for a state where trace amounts of odor are relatively large.

In the second working mode of this embodiment, as shown in Figure 3, because there are too many ice cubes on the refrigeration plate, which affects the water removal effect, at this time, the third valve of the first three-way valve 323 and the second three-way valve 324 is changed. The second interface is closed and the odor cannot enter the adsorption unit 4. The third interfaces of the first three-way valve 323 and the second three-way valve 324 are connected. The first blower 21 rotates forward and the second blower 22 rotates reversely, thereby removing water. An odor circulation is formed in the condensation unit 3. After the ice cubes on the refrigeration chips are melted, the suction and enrichment work is performed.

In the third working mode of this embodiment, as shown in Figure 4, the third air valve 53 and the eighth air valve 58 are in a closed state, the remaining air valves are in an open state, and the first three-way air valve 323 and the second three-way air valve 323 are in a closed state. The third interface of the ventilation valve 324 is closed. At this time, the first adsorption column 411 and the second adsorption column 412 are in series. The dried odor is adsorbed for the first time through the first adsorption column 411, and then through the second adsorption column 411. The secondary adsorption column performs the second adsorption, and is finally discharged through the third blower 23. In this way, two enrichments of trace amounts of odor can be completed, and the edible oil to be enriched has a lower odor content.

The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims (10)

1. A trace odor enrichment device, comprising: the device comprises an air inlet unit (1), a blower unit (2), a dewatering condensing unit (3) and an adsorption unit (4), wherein the blower unit (2) is arranged at the rear end of the air inlet unit (1), and the dewatering condensing unit (3) is respectively connected with the blower unit (2) and the adsorption unit (4); the adsorption unit (4) comprises a liquid nitrogen condensing box and an adsorption column arranged in the liquid nitrogen condensing box, a pipeline system is arranged in the adsorption unit (4), two ends of the adsorption column are connected with the water removal condensing unit (3) by the pipeline system, adsorbed odor is discharged, and an air valve system (5) for controlling the ventilation of the pipeline system is arranged on the pipeline system; the water removal condensing unit (3) and the adsorption unit (4) are arranged in a closed box body, and the blower unit (2) and the air inlet unit (1) are arranged outside the box body.

2. The trace odor enriching apparatus as defined in claim 1, wherein: the liquid nitrogen condensing tanks are at least provided with two, each liquid nitrogen condensing tank is internally provided with an adsorption column, and two ends of each adsorption column are connected through the pipeline system.

3. The trace odor enriching apparatus as defined in claim 2, wherein: the air inlet unit (1) comprises an air collecting port (11), and a dust filter screen (12) and a gas flowmeter (13) are arranged at the rear end of the air collecting port (11).

4. A trace odor enriching apparatus as defined in claim 3, wherein: the blower unit (2) comprises a first blower (21), a second blower (22) and a third blower (23), wherein the first blower (21) and the second blower (22) are arranged at the rear end of the air inlet unit (1), and the third blower (23) is arranged at the rear end of the adsorption unit (4) and is connected with the pipeline system.

5. The trace odor enriching apparatus as defined in claim 4, wherein: the dewatering and condensing unit (3) comprises a first refrigerating sheet group (311) and a second refrigerating sheet group (312), wherein a plurality of refrigerating sheets in the first refrigerating sheet group (311) and the second refrigerating sheet group (312) are arranged in parallel, and the refrigerating sheets are in a fusiform shape.

6. The trace odor enriching apparatus as defined in claim 5, wherein: the dewatering condensing unit (3) further comprises a liquid guide plate (33), a first Y-shaped gas pipe (321) and a second Y-shaped gas pipe (322), the liquid guide plate (33) is arranged between the first refrigerating sheet group (311) and the second refrigerating sheet group (312), one end of the first refrigerating sheet group (311) is communicated with the first air blower (21), the other end of the first refrigerating sheet group is communicated with the first Y-shaped gas pipe (321), one end of the second refrigerating sheet group (312) is communicated with the second air blower (22), the other end of the second refrigerating sheet group is communicated with the second Y-shaped gas pipe (322), the first Y-shaped gas pipe (321) and the second Y-shaped gas pipe (322) are communicated with the pipeline system, the first Y-shaped gas pipe (321) and the second Y-shaped gas pipe (322) are mutually communicated, a first three-way air valve (323) is arranged at the intersection of the first Y-shaped gas pipe (321), and a second three-way air valve (324) is arranged at the intersection of the second Y-shaped gas pipe (322).

7. The trace odor enriching apparatus as defined in claim 6, wherein: the bottom of the dewatering condensing unit (3) is provided with a water storage tank (34).

8. The trace odor enriching apparatus as defined in claim 7, wherein: the pipeline system is of a mesh-shaped pipeline structure, the two adsorption columns are a first adsorption column (411) and a second adsorption column (412) respectively and are arranged on a middle pipeline of the mesh-shaped pipeline structure respectively, and two vertexes of the mesh-shaped pipeline structure are communicated with a first Y-shaped gas pipe (321) and a second Y-shaped gas pipe (322) which correspond to each other respectively.

9. The trace odor enriching apparatus as defined in claim 8, wherein: the air valve system (5) comprises a first air valve (51), a second air valve (52), a third air valve (53), a fourth air valve (54), a fifth air valve (55), a sixth air valve (56), a seventh air valve (57) and an eighth air valve (58); the first air valve (51) and the second air valve (52) are arranged on the middle pipelines at two ends of the first adsorption column (411), the third air valve (53) and the fourth air valve (54) are arranged on the pipelines between the first adsorption column (411) and the second adsorption column (412), the fifth air valve (55) and the sixth air valve (56) are arranged on the middle pipelines at two ends of the second adsorption column (412), the seventh air valve (57) and the eighth air valve (58) are respectively arranged on the other two vertexes of the mesh-shaped pipeline structure, and the third air blower (23) is communicated with the pipeline between the seventh air valve (57) and the eighth air valve (58).

10. The trace odor enriching apparatus as defined in claim 9, wherein: each air valve of the air valve system (5) and the first three-way air valve (323) and the second three-way air valve (324) are controlled to be opened and closed through a PLC system.