Flue Gas Measurement Pretreatment Device

Abstract

The present invention relates to a pretreatment device for flue gas measurement, comprising a box body: provided with a box air inlet and a box air outlet and provided with cooling materials; a first filtering component, a first condensation component, a second filtering component, and a second condensation component are arranged in the box body and are connected in sequence; a first condensation water outlet and a first filtering water return port are connected, a second condensation water outlet and a second filtering water return port are connected, and the cooling materials effect condensation on the first condensation component and the second condensation component. In the present invention, a first filtering component, a first condensation component, a second filtering component, and a second condensation component are sequentially arranged in the box body, and a condensation reflux structure is provided, which is convenient for carrying and transporting, can be quickly installed and used, effectively removes impurities and pollutants in the flue gas, has a simple structure, low production cost, and recycles the filtering materials to save costs.

Description

Technical Field

[0001] The present invention relates to the technical field of various industrial flue gas measurement, and particularly relates to a pretreatment device for flue gas measurement. Background Art

[0002] In recent years, thermal power plants have increasingly paid attention to the problems of unit efficiency and pollutant emissions. For thermal power units, ensuring the safe, economic, and environmental protection operation of boilers is the premise and foundation. To ensure these premises and foundations, it is necessary to regularly carry out some work such as combustion adjustment and thermal testing of boilers. The accurate measurement of boiler flue gas components is the premise and foundation of these works. To ensure the accuracy of boiler flue gas components, a reliable flue gas pretreatment system is required.

[0003] For the flue gas measurement in conventional boiler combustion adjustment and thermal testing, many representative points are taken on the cross-section of the entire flue, and then flue gas is extracted and mixed at the positions of these representative points. However, when directly measuring these mixed flue gases, many problems will occur: the water in the gas mixing tank is sucked back to block the steel pipe, the connected rubber hose is blocked by long-term accumulated water, the accumulated water in the rubber hose is pumped into the flue gas analyzer to damage the instrument, etc. Now, a device that can conveniently and quickly pretreat flue gas measurement is needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a pretreatment device for flue gas measurement.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A pretreatment device for flue gas measurement, comprising

[0007] A box body: The box body is provided with a box air inlet and a box air outlet, and a cooling material is arranged inside the box body;

[0008] A first filtering component: It is arranged inside the box body. The first filtering component is provided with a first filtering air inlet, a first filtering air outlet, and a first filtering water return port. A first filtering material is arranged inside the first filtering component, and the first filtering air inlet and the first filtering air outlet are located on both sides of the first filtering material;

[0009] A first condensing component: It is arranged inside the box body. The first condensing component is provided with a first condensing air inlet, a first condensing air outlet, and a first condensing water outlet;

[0010] A second filtering component: It is arranged inside the box body. The second filtering component is provided with a second filtering air inlet, a second filtering air outlet, and a second filtering water return port. A second filtering material is arranged inside the second filtering component, and the second filtering air inlet and the second filtering air outlet are located on both sides of the second filtering material;

[0011] Second condensation component: It is arranged in the box body, and the second condensation component is provided with a second condensation air inlet, a second condensation air outlet and a second condensation water outlet;

[0012] The box air inlet is communicated with the first filtration air inlet, the first filtration air outlet is communicated with the first condensation air inlet, the first condensation air outlet is communicated with the second filtration air inlet, the second filtration air outlet is communicated with the second condensation air inlet, the second condensation air outlet is communicated with the box air outlet, the first condensation water outlet is communicated with the first filtration water return port, the second condensation water outlet is communicated with the second filtration water return port, and the cooling material condenses the first condensation component and the second condensation component.

[0013] Preferably, the first filtration material and the second filtration material are water, the first filtration air inlet and the second filtration air inlet are located below the water surface, and the first filtration air outlet and the second filtration air outlet are located above the water surface.

[0014] Preferably, a plurality of box air inlets are provided, a plurality of first filtration components and first condensation components are respectively provided, and one second filtration component is provided. One box air inlet, first filtration component and first condensation component form a group, and multiple groups of first condensation components are communicated with one second filtration component.

[0015] Further preferably, the second filtration component is provided with a plurality of second filtration air inlets, and the number of the second filtration air inlets is the same as the number of the first condensation components.

[0016] Preferably, a first one-way valve is arranged between the first filtration air outlet and the first condensation air inlet, and the first one-way valve enables the flue gas to only flow from the first filtration air outlet to the first condensation air inlet.

[0017] Preferably, a second one-way valve is arranged between the first condensation water outlet and the first filtration water return port, and the second one-way valve enables the condensed water to only flow from the first condensation water outlet to the first filtration water return port.

[0018] Preferably, the flue gas measurement pretreatment device further includes a flow control valve, the flow control valve is arranged between the first condensation air outlet and the second filtration air inlet, and the flow control valve is located outside the box body.

[0019] Further preferably, third one-way valves are provided both upstream and downstream of the flow control valve, and the third one-way valves enable the flue gas to flow only from the first condensate outlet through the flow control valve to the second filtration inlet.

[0020] Preferably, a plurality of the second condensation components are provided, and the plurality of the second condensation components are connected in series. The second filtration outlet is communicated with the second condensation inlet of the first one of the second condensation components in sequence. The second condensation outlet of the previous second condensation component is communicated with the second condensation inlet of the subsequent second condensation component. The second condensation outlet of the last second condensation component is communicated with the box outlet.

[0021] Further preferably, a condensation water return port is formed on the second condensation component. The second condensation water outlet of the subsequent second condensation component is communicated with the condensation water return port of the previous second condensation component. The second condensation water outlet of the first second condensation component is communicated with the second filtration water return port.

[0022] Still further preferably, a fourth one-way valve is provided between the second condensation water outlet of the subsequent second condensation component and the condensation water return port of the previous second condensation component, and the fourth one-way valve is provided between the second condensation water outlet of the first second condensation component and the second filtration water return port. The fourth one-way valve enables the condensed water to flow only from the second condensation water outlet of the subsequent second condensation component to the condensation water return port of the previous second condensation component until it flows from the second condensation water outlet of the first second condensation component to the second filtration water return port.

[0023] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0024] The present invention is a device arranged in a box, which is convenient for carrying and transportation, can be quickly installed and used. By sequentially arranging a first filtration component, a first condensation component, a second filtration component, and a second condensation component in the box, impurities and pollutants in the flue gas can be effectively removed. The structure is simple and the production cost is low. At the same time, a reflux structure is arranged between the condensation component and its preposed filtration component, so that the filter material can be recycled to save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Attached Figure 1 is a schematic internal structure diagram of this embodiment;

[0026] Attached Figure 2 is a schematic external structure diagram of this embodiment;

[0027] Attached Figure 3It is a schematic structural diagram of the first filtering component in this embodiment;

[0028] Appendix Figure 4 It is a schematic structural diagram of the first condensing component in this embodiment;

[0029] Appendix Figure 5 It is a schematic structural diagram of the second filtering component in this embodiment;

[0030] Appendix Figure 6 It is a schematic structural diagram of the second condensing component in this embodiment.

[0031] In the above figures: 1. Box body; 11. Box air inlet; 12. Box air outlet;

[0032] A1 - A8. First filtering component; 21. First filtering air inlet; 22. First filtering air outlet; 23. First filtering water outlet; 24. First filtering water return port;

[0033] B1 - B8. First condensing component; 31. First condensing air inlet; 32. First condensing air outlet; 33. First condensing water outlet;

[0034] C. Second filtering component; 41. Second filtering air inlet; 42. Second filtering air outlet; 43. Second filtering water outlet; 44. Second filtering water return port;

[0035] D1 - D3. Second condensing component; 51. Second condensing air inlet; 52. Second condensing air outlet; 53. Second condensing water outlet; 54. Condensing water return port;

[0036] 6. Flow control valve; 71. First check valve; 72; Second check valve; 73. Third check valve; 74. Fourth check valve. Detailed implementation manners

[0037] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] As Figure 1 , 2 shown, a flue gas measurement pretreatment device is integrally arranged, including a box body 1, a first filtering component A, a first condensation component B, a second filtering component C, a second condensation component D, and a flow control valve 6 arranged in the box body 1. The box body 1 is provided with a box air inlet 11 for communicating with the measurement representative point in the flue and a box air outlet 12 for communicating with the flue gas analysis equipment. A cooling material is arranged in the box body 1, and the cooling material condenses the first condensation component B and the second condensation component D. The box body 1 has a box cover, and during measurement, the box cover is hermetically connected. In this embodiment, the first filtering component A, the first condensation component B, the second filtering component C, and the second condensation component D are tanks made of plexiglass, the box air inlet 11 and the box air outlet 12 are made of plexiglass, and the cooling material is water mixed with ice cubes. The flow control valve 6 can control the amount of flue gas extracted from the representative point according to actual needs.

[0041] As Figures 3 - 6As shown, a first filter material is provided inside the first filter component A. The first filter component A is provided with a first filter air inlet 21, a first filter air outlet 22, and a first filter water outlet 23. The first filter air inlet 21 and the first filter air outlet 22 are located on both sides of the first filter material, facilitating the full filtration of dust in the flue gas. The first condensation component B is provided with a first condensation air inlet 31 and a first condensation air outlet 32. A second filter material is provided inside the second filter component C. The second filter component C is provided with a second filter air inlet 41, a second filter air outlet 42, and a second filter water outlet 43. The second filter air inlet 41 and the second filter air outlet 42 are located on both sides of the second filter material, facilitating the re-filtration of dust in the flue gas. The second condensation component D is provided with a second condensation air inlet 51 and a second condensation air outlet 52.

[0042] As Figure 1 shown, the box air inlet 11 is communicated with the first filter air inlet 21, the first filter air outlet 22 is communicated with the first condensation air inlet 31, the first condensation air outlet 32 is communicated with the second filter air inlet 41, the second filter air outlet 42 is communicated with the second condensation air inlet 51, and the second condensation air outlet 52 is communicated with the box air outlet 12. The flue gas passes through the filtration of the first filter component A, the condensation of the first condensation component B, the filtration of the second filter component C, and the condensation of the second condensation component D in sequence and then is introduced into the flue gas analysis device. A first one-way valve 71 is provided between the first filter air outlet 22 and the first condensation air inlet 31. The first one-way valve 71 enables the flue gas to only flow from the first filter air outlet 22 to the first condensation air inlet 31, preventing back suction.

[0043] A flow control valve 6 is provided between the first condensation air outlet 32 and the second filter air inlet 41. The flow control valve 6 is located outside the box body 1 for easy operation. Third one-way valves 73 are provided both upstream and downstream of the flow control valve 6. The third one-way valves 73 enable the flue gas to only flow from the first condensation air outlet 32 through the flow control valve 6 to the second filter air inlet 41.

[0044] The first filtering material and the second filtering material are water. The first filtering air inlet 21 and the second filtering air inlet 41 are close to the bottom of their respective tanks and are below the water surface. The first filtering air outlet 22 and the second filtering air outlet 42 are opened at the top of their respective tanks and are above the water surface. The first filtering water outlet 23 and the second filtering water outlet 43 are opened at the bottom of their respective tanks and are connected to the outside of the box body 1, facilitating the direct discharge of the filtered water. The first condensation air inlet 31 is close to the bottom of its tank, and the first condensation air outlet 32 is located at the top of the tank, facilitating the full condensation of the moisture carried by the hot flue gas in the first filtering component A. The first condensation air inlet 31 is close to the bottom of its tank, and the first condensation air outlet 32 is located at the top of its tank, facilitating the full condensation of the moisture carried by the hot flue gas in the first filtering component A. The second condensation air inlet 51 is close to the bottom of its tank, and the second condensation air outlet 52 is located at the top of its tank, facilitating the full condensation of the moisture carried by the hot flue gas in the second filtering component C.

[0045] As Figure 1 , 3 , as shown in Figure 4, a first condensation water outlet 33 is opened at the bottom of the first condensation component B, and a first filtering water return port 24 is opened at the top of the first filtering component A. The first condensation water outlet 33 is connected to the first filtering water return port 24, and a second one-way valve 72 is provided therebetween. The second one-way valve 72 enables the condensed water to only flow from the first condensation water outlet 33 to the first filtering water return port 24, effectively recovering the condensed water and saving costs.

[0046] There are multiple box air inlets 11. There are multiple first filtering components A and first condensation components B respectively, and there is one second filtering component C. One box air inlet 11, the first filtering component A, and the first condensation component B form a group. Each group of box air inlets 11 corresponds to a measurement representative point. Multiple first condensation components B are connected to one second filtering component C. The second filtering component C is provided with multiple second filtering air inlets 41, and the number of the second filtering air inlets 41 is the same as the number of the first condensation components B. Finally, the flue gases at multiple representative points are mixed together and then introduced into the flue gas analysis equipment. A flow control valve 6 is provided after each group of first condensation air outlets 32. According to the different flue gas flows at each representative point in the flue duct, the flue gas volume of the flue gas extracted from each representative point is adjusted. A first one-way valve 71 is provided between each group of first filtering air outlets 22 and the first condensation air inlets 31, a second one-way valve 72 is provided between each group of first condensation water outlets 33 and the first filtering water return ports 24, and a third one-way valve 73 is provided between each group of flow control valves 6 and the second filtering air inlets 41 to ensure that the flue gas or condensed water cannot flow back.

[0047] As Figure 1 , 5, as shown in FIGS. 6, a plurality of second condensation components D are provided, and the plurality of second condensation components D are connected in series. Multi-stage condensation is used to condense the mixed flue gas. In this embodiment, three second condensation components D are provided. The second filtered air outlet 42 communicates with the second condensation inlet 51 of the first second condensation component D in the sequence. The second condensation outlet 52 of the previous second condensation component D communicates with the second condensation inlet 51 of the subsequent second condensation component D. The second condensation outlet 52 of the last second condensation component D communicates with the box air outlet 12.

[0048] A condensation water return port 54 is formed on the second condensation component D. The second condensation water outlet 53 of the subsequent second condensation component D communicates with the condensation water return port 54 of the previous second condensation component D, and a fourth one-way valve 74 is provided therebetween. The second condensation water outlet 53 of the first second condensation component D in the sequence communicates with the second filtered water return port 44, and a fourth one-way valve 74 is provided therebetween, so that the condensed water can only flow from the second condensation water outlet 53 of the subsequent second condensation component D to the condensation water return port 54 of the previous second condensation component D, until it flows from the second condensation water outlet 53 of the first second condensation component D in the sequence to the second filtered water return port 44, which can effectively recover the condensed water and save costs.

[0049] In this embodiment, the first one-way valve 71, the second one-way valve 72, the third one-way valve 73, and the fourth one-way valve 74 adopt spring check valves, and the material is transparent plastic.

[0050] The working principle of this embodiment is specifically described below:

[0051] Before the test, first fill the first filtering component A and the second filtering component C with water to the position of 2 / 3 of the water level, and the box body 1 also needs to be filled with water to the position of 2 / 3 of the water level. At the same time, prepare ice cubes in advance.

[0052] During the test, open the lid of the box body 1, put some ice cubes into the box and then seal it. The flue gas enters from the box air inlet 11, passes through the connecting pipe and enters the first filtering component A. The water in the tank is used to filter the flue gas for the first time and cool it preliminarily at the same time. The filtered flue gas is sent into the first condensation component B through the first one-way valve 71 for condensation. The condensed water is drawn out from the first condensation water outlet 33 at the bottom of the tank of the first condensation component B and sent back to the first filtering component A through the second one-way valve 72. The flue gas continues to be drawn out from the first condensation component B, passes through the third one-way valve 73 and enters the flow control valve 6. According to the flue gas flow at the representative point in the flue, the corresponding flow control valve 6 is adjusted. After the flow is adjusted, the flue gas enters the second filtering component C through the third one-way valve 73 for mixing, and at the same time, the flue gas is filtered and cooled for the second time. The mixed flue gas enters the second condensation component D for condensation. The condensed water flows out from the second condensation water outlet 53 at the bottom of the second condensation component D and is sent back to the second filtering component C in reverse through the fourth one-way valve 74. Then secondary condensation and tertiary condensation are carried out in sequence. Finally, the flue gas flows out from the second condensation component D, passes through the connecting pipe and flows out from the box air outlet 12 on the box body 1, and is sent into the flue gas analysis equipment for analysis.

[0053] The device provided in this embodiment is mainly used to filter the dust in the flue gas and condense the moisture in the flue gas to ensure that clean flue gas is introduced into the flue gas analyzer. This embodiment mainly uses water to filter dust and ice to cool and condense, does not need to replace the filter element frequently, does not need to connect the power supply, has a small volume and is convenient to connect. The box body 1 itself has a heat preservation function and can be applied to various environments.

[0054] The above embodiments are only for explaining the technical concept and characteristics of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A pretreatment device for flue gas measurement, characterized in that: Including Box body: The box body is provided with a box air inlet and a box air outlet. A plurality of box air inlets are provided. A cooling material is arranged in the box body, and the cooling material is water mixed with ice cubes; First filtering component: Arranged in the box body, the first filtering component is provided with a first filtering air inlet, a first filtering air outlet and a first filtering water return port. A first filtering material is arranged in the first filtering component, and the first filtering air inlet and the first filtering air outlet are located on both sides of the first filtering material; First condensation component: Arranged in the box body, the first condensation component is provided with a first condensation air inlet, a first condensation air outlet and a first condensation water outlet; Second filtering component: Arranged in the box body, the second filtering component is provided with a second filtering air inlet, a second filtering air outlet and a second filtering water return port. A second filtering material is arranged in the second filtering component, and the second filtering air inlet and the second filtering air outlet are located on both sides of the second filtering material; Second condensation component: Arranged in the box body, the second condensation component is provided with a second condensation air inlet, a second condensation air outlet and a second condensation water outlet; Flow control valve: Arranged between the first condensation air outlet and the second filtering air inlet, and the flow control valve is located outside the box body, The box air inlet is communicated with the first filtering air inlet, the first filtering air outlet is communicated with the first condensation air inlet, the first condensation air outlet is communicated with the second filtering air inlet, the second filtering air outlet is communicated with the second condensation air inlet, the second condensation air outlet is communicated with the box air outlet, the first condensation water outlet is communicated with the first filtering water return port, the second condensation water outlet is communicated with the second filtering water return port, the cooling material condenses the first condensation component and the second condensation component. A plurality of the first filtering components and the first condensation components are respectively provided, and one second filtering component is provided. One box air inlet, the first filtering component and the first condensation component are in a group, and multiple groups of the first condensation components are communicated with one second filtering component.

2. The flue gas measurement pretreatment device according to claim 1, characterized in that: The first filtering material and the second filtering material are water. The first filtering air inlet and the second filtering air inlet are located below the water surface, and the first filtering air outlet and the second filtering air outlet are located above the water surface.

3. The flue gas measurement pretreatment device according to claim 1, characterized in that: A first one-way valve is arranged between the first filtering air outlet and the first condensation air inlet.

4. The flue gas measurement pretreatment device according to claim 1, characterized in that: A second one-way valve is arranged between the first condensation water outlet and the first filtering water return port.

5. The flue gas measurement pretreatment device according to claim 1, wherein: Third one-way valves are arranged upstream and downstream of the flow control valve.

6. The flue gas measurement pretreatment device according to claim 1, characterized in that: A plurality of the second condensation components are provided, and the plurality of the second condensation components are connected in series. The second filtered air outlet is communicated with the second condensation air inlet of the first second condensation component. The second condensation air outlet of the previous second condensation component is communicated with the second condensation air inlet of the subsequent second condensation component. The second condensation air outlet of the last second condensation component is communicated with the box air outlet.

7. The pretreatment device for flue gas measurement according to claim 6, characterized in that: A condensation water return port is formed on the second condensation component. The second condensation water outlet of the subsequent second condensation component is communicated with the condensation water return port of the previous second condensation component. The second condensation water outlet of the first second condensation component is communicated with the second filtered water return port.

8. The flue gas measurement pre-treatment device according to claim 7, characterized in that: A fourth one-way valve is provided between the second condensation water outlet of the subsequent second condensation component and the condensation water return port of the previous second condensation component. The fourth one-way valve is provided between the second condensation water outlet of the first second condensation component and the second filtered water return port.

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