Flue gas multi-stage treatment equipment

Abstract

The utility model relates to the technical field of flue gas treatment, in particular to multi-stage flue gas treatment equipment which is characterized in that a flue gas inlet and a flue gas outlet are respectively formed in two ends of an equipment shell, and a heat exchange water removal mechanism, a rotational flow water removal mechanism and a filtering water removal mechanism are sequentially arranged in the equipment shell along the flue gas flowing direction from the flue gas inlet to the flue gas outlet. After the temperature of flue gas is reduced through the heat exchange and water removal mechanism and heat recovery is carried out, moisture in the flue gas is subjected to first-time condensation and water removal operation after encountering the heat exchange pipe; smoke generates rotational flow in the process of flowing from the water removal transverse pipe to the water removal vertical pipe, the rotational flow enables moisture in the smoke to be condensed and collected along the inner wall of the water removal vertical pipe, gas is deflected upwards, liquid is collected downwards and discharged under the action of gravity, and the rotational flow water removal mechanism can remove most moisture in the smoke. And a small amount of residual water vapor in the flue gas further enters the filtering and water removing mechanism to be adsorbed. According to the device, extra refrigeration energy consumption is not needed, and the cost of flue gas water removal is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to multi-stage flue gas treatment equipment. Background Art

[0002] The essence of flue gas re-burning is to control the combustion temperature and oxide concentration by reintroducing the flue gas produced by combustion into the combustion area. The flue gas needs to be treated at multiple levels before it is re-burned. The principle is to capture the heat energy in the flue gas through a specific device for reuse and remove the moisture in the flue gas to prevent condensed water from entering the burner and causing corrosion. In the prior art, a special heat exchanger can absorb part of the heat energy in the flue gas, and then the flue gas is placed in a low-temperature environment to condense and extract the water vapor in the flue gas. However, refrigeration equipment is required to form a low-temperature environment, which consumes a lot of electricity and increases energy consumption. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a multi-stage flue gas treatment device.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: a multi-stage flue gas treatment device, including an equipment shell, a smoke inlet and a smoke outlet are respectively provided at both ends of the equipment shell, and a heat exchange and dewatering mechanism, a cyclone dewatering mechanism and a filtering and dewatering mechanism are provided in sequence inside the equipment shell along the smoke flow direction from the smoke inlet to the smoke outlet. The cyclone dewatering mechanism includes a fixed partition, a dewatering transverse pipe and a dewatering vertical pipe. The fixed partition is longitudinally installed in the equipment shell between the heat exchange and dewatering mechanism and the filtering and dewatering mechanism. A plurality of fixed sockets are evenly provided on the fixed partition. The dewatering transverse pipe is inserted into the fixed socket on the side of the fixed partition facing the filtering and dewatering mechanism, and the extended ends of every two or more dewatering transverse pipes are connected with a vertically arranged dewatering vertical pipe.

[0005] Preferably, the plurality of vertical water removal pipes are staggered in the vertical direction.

[0006] Preferably, a connecting fixing plate is fixedly provided on one side of the plurality of dewatering vertical pipes, and two ends of the connecting fixing plate are respectively installed on two symmetrical side surfaces inside the equipment housing.

[0007] Preferably, the heat exchange and water removal mechanism includes an air collecting hood, which is installed through the top of the equipment casing, and a flow guide hood is installed on the top of the air collecting hood, and an inlet fan is installed at the top opening of the flow guide hood. A heat exchange concentration box is provided below the air collecting hood, and the heat exchange concentration box is installed on the inner bottom surface of the equipment casing. A plurality of heat exchange tubes are installed between the bottom of the air collecting hood and the top of the heat exchange concentration box, and an air outlet duct is provided at the bottom of the heat exchange concentration box.

[0008] Preferably, the filtering and water removal mechanism comprises a filter cotton fixing frame and filter cotton installed inside the equipment housing, a plurality of filter cotton mounting holes are opened on the side of the filter cotton fixing frame, and the filter cotton is matched and installed inside the filter cotton mounting holes.

[0009] Preferably, a drain outlet is installed through the bottom end of the device housing, a drain valve is installed on the drain outlet, and the drain outlet is located between the cyclone water removal mechanism and the filtration water removal mechanism.

[0010] Preferably, a plurality of inspection openings are provided on the side of the device housing, and the plurality of inspection openings respectively correspond to the installation positions of the plurality of filter cottons, and the plurality of inspection openings are matched with inspection doors installed in a detachable manner.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] In this scheme, after the flue gas has its temperature lowered and heat recovered by the heat exchange and dehydration mechanism, the moisture in the flue gas encounters the heat exchange tubes and undergoes the first condensation and dehydration operation; then, the flue gas enters multiple dehydration horizontal tubes, and a vortex is generated in the process of flowing from the dehydration horizontal tubes to the dehydration vertical tubes. The vortex causes the moisture in the flue gas to condense and gather along the inner wall of the dehydration vertical tube, and the gas is diverted upward, while the liquid is gathered and discharged downward under the action of gravity. The vortex dehydration mechanism can remove most of the moisture in the flue gas; and the remaining small amount of water vapor in the flue gas will further enter the filtering and dehydration mechanism for adsorption.

[0013] Therefore, this solution removes moisture from flue gas by physical contact and adsorption. Compared with the prior art method of removing moisture by lowering the ambient temperature through refrigeration equipment, it does not require additional refrigeration energy consumption, thus reducing the cost of flue gas dehydration. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the installation position of the smoke inlet of the multi-stage smoke treatment equipment of the utility model;

[0015] Figure 2 This is a schematic diagram of the installation position of the smoke outlet of the multi-stage smoke treatment equipment of the utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the multi-stage flue gas treatment equipment of the utility model;

[0017] Figure 4 It is a schematic diagram of the heat exchange and water removal mechanism structure of the multi-stage flue gas treatment equipment of the utility model;

[0018] Figure 5 It is a schematic diagram of the connection structure of the dewatering horizontal pipe and the dewatering vertical pipe of the multi-stage flue gas treatment equipment of the utility model;

[0019] Figure 6 This is a schematic diagram of the structure of the filter cotton fixing frame of the multi-stage flue gas treatment equipment of the utility model;

[0020] Figure 7 This is a schematic diagram of the equipment shell structure of the multi-stage flue gas treatment equipment of the present utility model.

[0021] In the figure: 1. Inspection door; 2. Equipment casing; 3. Fan inlet; 4. Air guide cover; 5. Smoke inlet; 6. Smoke outlet; 7. Fixed partition; 8. Filter cotton; 9. Filter cotton fixing frame; 10. Connecting fixing plate; 11. Water removal vertical pipe; 12. Water removal horizontal pipe; 13. Wind collecting hood; 14. Heat exchange tube; 15. Heat exchange concentration box; 16. Inspection port. DETAILED DESCRIPTION

[0022] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0023] like Figure 1-7 The multi-stage flue gas treatment equipment shown includes an equipment housing 2, and a smoke inlet 5 and a smoke outlet 6 are respectively provided at both ends of the equipment housing 2. The interior of the equipment housing 2 is provided with a heat exchange dewatering mechanism, a cyclone dewatering mechanism and a filtering dewatering mechanism in sequence along the smoke flow direction from the smoke inlet 5 to the smoke outlet 6. The cyclone dewatering mechanism includes a fixed partition 7, a dewatering transverse pipe 12 and a dewatering vertical pipe 11. The fixed partition 7 is longitudinally installed in the equipment housing 2 between the heat exchange dewatering mechanism and the filtering dewatering mechanism. A plurality of fixed sockets are evenly provided on the fixed partition 7. The dewatering transverse pipe 12 is inserted into the fixed socket on the side of the fixed partition 7 facing the filtering dewatering mechanism, and the extended ends of every two or more dewatering transverse pipes are connected with a vertically arranged dewatering vertical pipe 11.

[0024] After the flue gas has its temperature lowered and heat recovered by the heat exchange and dehydration mechanism, the moisture in the flue gas encounters the heat exchange tube 14 and undergoes the first condensation and dehydration operation; then, the flue gas enters multiple dehydration transverse tubes 12, and generates a vortex in the process of flowing from the dehydration transverse tube 12 to the dehydration vertical tube 11. The vortex causes the moisture in the flue gas to condense and gather along the inner wall of the dehydration vertical tube 11, and the gas is diverted upward, while the liquid is gathered and discharged downward under the action of gravity. The vortex dehydration mechanism can remove most of the moisture in the flue gas; and the remaining small amount of water vapor in the flue gas will further enter the filtering and dehydration mechanism for adsorption.

[0025] Multiple water removal vertical pipes 11 are staggered in the vertical direction, and a connecting and fixing plate 10 is fixedly connected to one side of the multiple water removal vertical pipes 11 located at the same horizontal height. The two ends of the connecting and fixing plate 10 are respectively installed on two symmetrical side surfaces inside the equipment housing 2. The connecting and fixing plate 10 is used to connect and fix the multiple water removal vertical pipes 11 arranged horizontally, thereby improving the stability of the position of the water removal vertical pipes 11.

[0026] The heat exchange and water removal mechanism includes an air collecting hood 13, which is installed through the top of the equipment casing 2. A flow guide hood 4 is installed on the top of the air collecting hood 13, and an inlet fan 3 is installed at the top opening of the flow guide hood 4. A heat exchange concentration box 15 is provided below the air collecting hood 13, and the heat exchange concentration box 15 is installed on the inner bottom surface of the equipment casing 2. A plurality of heat exchange tubes 14 are installed through the bottom of the air collecting hood 13 and the top of the heat exchange concentration box 15, and an air outlet pipe is provided at the bottom of the heat exchange concentration box 15.

[0027] The flue gas enters the equipment casing 2 through the smoke inlet. During the surface flow process of the multiple heat exchange tubes 14, the inlet fan 3 is powered on synchronously to transport the outside air to the multiple heat exchange tubes 14 through the deflector 4 and the wind collecting hood 13 in turn. Since the temperature of the outside air is lower than the temperature of the flue gas, the heat in the flue gas is transferred to the airflow in the heat exchange tubes 14. The temperature of the flue gas is reduced through the principle of temperature difference heat exchange, which helps to realize the condensation of water vapor in the flue gas and can implement the first dehydration of the flue gas. After the airflow in the multiple heat exchange tubes 14 is heated, it is concentrated and transported to the heat exchange concentration box 15, and the hot air is discharged through the outlet pipe to the equipment with heat energy demand for reuse.

[0028] A drain port is installed through the bottom of the equipment housing 2, and a drain valve is installed on the drain port. The drain port is located between the cyclone dehydration mechanism and the filtration dehydration mechanism. The water vapor in the flue gas is dehydrated by the dehydration horizontal pipe 12 and the dehydration vertical pipe 11 and then discharged to the inner bottom surface of the equipment housing 2. As more and more aqueous solutions are collected, the aqueous solutions can be discharged to the external environment through the drain valve.

[0029] The filtering and dewatering mechanism includes a filter cotton fixing frame 9 and filter cotton 8 installed inside the equipment housing 2. The side of the filter cotton fixing frame 9 is provided with a plurality of filter cotton installation holes, and the filter cotton 8 is matched and installed inside the filter cotton installation holes. The filter cotton 8 is used to absorb a small amount of moisture remaining in the flue gas after being processed by the cyclone dewatering mechanism. The side of the equipment housing 2 is provided with a plurality of inspection ports 16, and the plurality of inspection ports 16 correspond to the positions of the plurality of filter cottons 8, respectively. The interiors of the plurality of inspection ports 16 are matched and installed with inspection doors 1. The inspection ports 16 are provided for staff to replace the filter cotton 8, and the inspection door 1 is used to seal the inspection ports 16 during the flue gas dewatering process, thereby improving the stability of the flue gas flow in the equipment housing 2.

[0030] When the smoke passes through the filter cotton 8, the filter cotton 8 can further absorb the moisture in the smoke. When the filter cotton 8 absorbs too much moisture, the moisture will be deposited in the filter cotton 8 at the bottom due to its own gravity, and finally overflow to the outside, and gather near the drain valve along the bottom of the equipment housing 2 for discharge. Similarly, the moisture condensed on the surface of the heat exchange tube 14 will also flow to the bottom of the equipment housing 2 and gather near the drain valve, and finally be discharged from there.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A multi-stage flue gas treatment device, comprising a device housing (2), wherein two ends of the device housing (2) are respectively provided with a smoke inlet and a smoke outlet, wherein: The interior of the equipment housing (2) is provided with a heat exchange dewatering mechanism, a cyclone dewatering mechanism and a filtering dewatering mechanism in sequence along the direction of smoke flow from the smoke inlet to the smoke outlet. The cyclone dewatering mechanism comprises a fixed partition (7), a dewatering transverse pipe (12) and a dewatering vertical pipe (11). The fixed partition (7) is longitudinally installed in the equipment housing (2) between the heat exchange dewatering mechanism and the filtering dewatering mechanism. A plurality of fixed plug holes are evenly arranged on the fixed partition (7). The dewatering transverse pipe (12) is inserted into the fixed plug hole on the side of the fixed partition (7) facing the filtering dewatering mechanism. The extended ends of every two or more dewatering transverse pipes are connected to a vertically arranged dewatering vertical pipe (11).

2. The multi-stage flue gas treatment equipment according to claim 1, characterized in that: The plurality of water removal vertical pipes (11) are staggeredly arranged along the vertical direction.

3. The multi-stage flue gas treatment equipment according to claim 2, characterized in that: A connecting and fixing plate (10) is provided on one side of the plurality of water removal vertical pipes (11), and two ends of the connecting and fixing plate (10) are respectively mounted on two symmetrical side surfaces inside the equipment housing (2).

4. The multi-stage flue gas treatment equipment according to claim 1, characterized in that: The heat exchange and water removal mechanism comprises an air collecting hood (13), the air collecting hood (13) is installed through the top of the equipment housing (2), a guide hood (4) is installed on the top of the air collecting hood (13), an inlet fan (3) is installed at the top opening of the guide hood (4), a heat exchange concentration box (15) is provided below the air collecting hood (13), the heat exchange concentration box (15) is installed on the inner bottom surface of the equipment housing (2), a plurality of heat exchange tubes (14) are installed through the bottom of the air collecting hood (13) and the top of the heat exchange concentration box (15), and an air outlet pipe is provided at the bottom of the heat exchange concentration box (15).

5. The multi-stage flue gas treatment equipment according to claim 1, characterized in that: The filtering and water removal mechanism comprises a filter cotton fixing frame (9) and filter cotton (8) mounted inside the device housing (2); a plurality of filter cotton mounting holes are provided on the side of the filter cotton fixing frame (9); and the filter cotton (8) is matched and mounted inside the filter cotton mounting holes.

6. The multi-stage flue gas treatment equipment according to claim 1, characterized in that: A drain outlet is installed through the bottom end of the equipment housing (2), a drain valve is installed on the drain outlet, and the drain outlet is located between the cyclone water removal mechanism and the filtration water removal mechanism.

7. The multi-stage flue gas treatment equipment according to claim 1, characterized in that: A plurality of inspection openings (16) are provided on the side of the device housing (2), the plurality of inspection openings (16) respectively corresponding to the installation positions of the plurality of filter cottons (8), and the plurality of inspection openings (16) are matched with inspection doors (1) installed in a detachable manner.

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