CN209092912U - A high-humidity flue gas particulate matter removal and whitening system - Google Patents

Abstract

The utility model discloses a kind of removals of high-humidity gas fume particulate matter to take off white system, its structure includes flue gas delivery pipe, plate heat exchanger, waste-heat recovery device, discharging valve, air blower, surrounding air discharge pipe and exhaust pipe, a kind of high-humidity gas fume particulate matter removal of the utility model takes off white system, heat exchange cooling is carried out by plate heat exchanger, waste-heat recovery device recycling waste heat is stored for equipment utilization, dry air after heating is blasted the flue gas after cooling and dewatering and met mixing by air blower, reduce the dew-point temperature of emptying flue gas, make to empty flue gas and dew-point temperature is not achieved in very short time after the exit, tail gas moisture will not condense into water mist, and then achieve the purpose that cut down white cigarette, harmful substance is discharged as the removal of white haze is removed again reduction together with condensed water simultaneously, flue gas emission control can not be improved by solving , atmospheric haze is reduced, while white cigarette and reuse waste heat can not be effectively removed, reaches the problem of saving water and energy.

Description

A high-humidity flue gas particulate matter removal and whitening system

technical field

The utility model relates to a high-humidity flue gas particulate matter removing and whitening system, which belongs to the field of high-humidity flue gas particulate matter removing and whitening systems.

Background technique

Fine particulate matter (PM2.5) pollution with aerodynamic diameter less than 2.5mm has become a prominent atmospheric environmental problem in my country. The main reason is that fine particulate matter has a large specific surface area and is easy to enrich various heavy metals and chemical carcinogens. It is difficult to effectively capture, causing a large number of fine particles to be discharged into the atmospheric environment. For example, although the total dust removal efficiency of electrostatic precipitators can reach more than 99%, the removal efficiency of fine particles is not high, and the removal efficiency decreases with the particle size. The efficiency drops significantly; wet desulfurization devices and wet scrubbers are also difficult to effectively capture fine particles. In some wet desulfurization processes, due to the formation of inorganic salt aerosols and sulfuric acid droplets, the concentration of fine particles increases after desulfurization. With the rapid development of science and technology, the high-humidity flue gas particulate matter removal and whitening system has also been technically improved, but the existing technology cannot improve flue gas emission control, reduce atmospheric haze, and cannot effectively remove white smoke and reuse waste heat. To save water and energy.

Utility model content

In view of the deficiencies of the prior art, the purpose of the present invention is to provide a high-humidity flue gas particulate matter removal and whitening system, so as to solve the problem that the prior art cannot improve the control of flue gas emissions, reduce atmospheric haze, and at the same time cannot effectively remove white smoke And reuse the waste heat to save water and energy.

In order to achieve the above purpose, the present utility model is achieved through the following technical solutions: a high-humidity flue gas particulate matter removal and whitening system, including a flue gas conveying pipe, a plate heat exchanger, a waste heat recovery device, a drain valve, a blower, an environment The air discharge pipe and the exhaust pipe, the bottom end of the flue gas conveying pipe is plugged with the top end of the plate heat exchanger, the middle part of the left end of the plate heat exchanger is welded with the upper and lower ends of the waste heat recovery device, and the top of the drain valve is connected to the upper and lower ends of the waste heat recovery device. The right side of the bottom of the plate heat exchanger is plugged, the left end of the blower is welded to the bottom of the right end of the plate heat exchanger, the left end of the top of the ambient air discharge pipe is plugged with the top of the right end of the plate heat exchanger, and the left end of the exhaust pipe is connected. The top is plugged with the bottom end of the plate heat exchanger, and the bottom end of the ambient air discharge pipe is plugged with the top end of the middle part of the exhaust pipe.

Further, a dust filter is arranged inside the left end of the flue gas conveying pipe, and the dust filter has a fine mesh structure, which is beneficial to prevent dust from entering.

Further, more than two horizontal flat corrugated metal sheets are arranged inside the plate heat exchanger, which is beneficial to heat exchange and improves heat exchange efficiency.

Further, the ambient air discharge pipe is L-shaped, which is conducive to the discharge of ambient air.

Further, the exhaust duct is U-shaped, which is conducive to the discharge of flue gas.

Further, the outer diameter of the flue gas conveying pipe is consistent with the inner diameter of the top end of the plate heat exchanger, which is conducive to plugging.

Further, the model of the blower is DF-2, which has the advantages of safe operation and long service life.

Further, the plate heat exchanger adopts the BRB series plate heat exchanger, which has the advantages of high heat exchange efficiency and small heat loss.

The utility model relates to a high-humidity flue gas particulate matter removal and whitening system. A plate heat exchanger is used for heat exchange and cooling, a waste heat recovery device recovers excess heat for storage for equipment use, and a blower blows the heated dry air into the air for cooling and dehydration. The flue gas meets and mixes, which reduces the dew point temperature of the exhaust flue gas, so that the exhaust flue gas cannot reach the dew point temperature within a short period of time after being discharged, and the moisture in the exhaust gas will not condense into water mist, thereby reducing white smoke. At the same time, the harmful substances are removed again along with the removal of white fog and are discharged together with condensed water, which solves the problem that the control of flue gas emission cannot be improved, the atmospheric haze cannot be improved, and the white smoke cannot be effectively removed and the waste heat can be reused, so as to save energy. The issue of water conservation.

Description of drawings

Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the flow chart of the utility model;

In the picture: flue gas conveying pipe-1, plate heat exchanger-2, waste heat recovery device-3, water discharge valve-4, blower-5, ambient air discharge pipe-6, exhaust pipe-7.

Detailed ways

In order to make the technical means, creation features, achievement goals and effects of the present invention easy to understand and understand, the present invention will be further described below with reference to the specific embodiments.

Please refer to FIG. 1 and FIG. 2, the utility model provides a high-humidity flue gas particulate matter removal and whitening system: including flue gas conveying pipe 1, plate heat exchanger 2, waste heat recovery device 3, drain valve 4, blower 5, environment The air discharge pipe 6 and the exhaust pipe 7, the bottom end of the flue gas conveying pipe 1 is plugged with the top end of the plate heat exchanger 2, the middle part of the left end of the plate heat exchanger 2 is welded with the upper and lower ends of the waste heat recovery device 3, and the top of the drain valve 4 is welded. The left end of the blower 5 is welded with the bottom right end of the plate heat exchanger 2, the left end of the top left end of the ambient air discharge pipe 6 is inserted into the top right end of the plate heat exchanger 2, and the exhaust pipe 7 The top of the left end is plugged with the bottom end of the plate heat exchanger 2, the bottom end of the ambient air discharge pipe 6 is plugged with the top of the middle part of the exhaust pipe 7, and a dust filter is provided inside the left end of the flue gas delivery pipe 1, and the dust filter The mesh has a fine mesh structure, the plate heat exchanger 2 is provided with more than two horizontal flat corrugated metal sheets, the ambient air discharge pipe 6 is L-shaped, the exhaust pipe 7 is U-shaped, and the flue gas conveying pipe 1 The outer diameter is consistent with the inner diameter of the top end of the plate heat exchanger 2 .

The plate heat exchanger 2 described in this patent is a high-efficiency heat exchanger composed of a series of metal sheets with a certain corrugated shape. , Plate heat exchanger 2 is an ideal equipment for liquid-liquid and liquid-vapor heat exchange. It has the characteristics of high heat exchange efficiency, small heat loss, compact and lightweight structure, small footprint, wide application and long service life. Under the same pressure loss, the heat transfer coefficient is 3-5 times higher than that of the tubular heat exchanger, the floor area is one third of that of the tubular heat exchanger, and the heat recovery rate can be as high as 90% or more.

When the user wants to use this patent, the high-humidity flue gas particulate matter removal and whitening system is used to remove condensable particulate matter in the high-humidity flue gas after industrial desulfurization, so as to achieve the effect of eliminating white smoke from the chimney flue gas discharge port. After industrial desulfurization The flue gas is introduced from the top of the plate heat exchanger 2 by the flue gas conveying pipe 1, and the blower 5 blows a large amount of clean ambient air from the bottom of the plate heat exchanger 2. The two gases are fully contacted under the guidance of the special internal structure of the instrument to exchange Thermal cooling, the new super-hydrophobic coating used on the inner wall of the plate heat exchanger 2 can strengthen the condensation of water vapor, which is conducive to the condensation of water vapor into droplets, which is not easy to stick to the wall and gather, which greatly improves the condensation heat transfer performance. Therefore, at this time, the Due to the heat exchange effect of the high-humidity flue gas and the enhanced condensation effect of the super-hydrophobic coating, water droplets and condensable solid particles can be quickly condensed to achieve the effect of simultaneous removal. On the other hand, the interior of the heat exchanger can also further reduce the dust in the flue gas. , NOx, SO2 and other harmful gases, eliminate the precursor substances that can form PM2.5, and release a large amount of thermal energy when the moisture in the flue gas condenses to heat the ambient dry air in the heat exchanger to increase its temperature, and the waste heat recovery device 3 can The excess heat is recovered for storage for equipment use, the flue gas after heat exchange is discharged through the exhaust pipe 7, and the blower 5 blows the heated dry air into the ambient air discharge pipe 6 and the exhaust pipe 7 to cool and dehydrate the smoke. In this way, the moisture content and relative humidity of the mixed flue gas are greatly reduced, thereby reducing the dew point temperature of the exhaust flue gas, so that the exhaust flue gas cannot reach the dew point temperature within a short time after being discharged. , the moisture in the exhaust gas will not condense into water mist, and then achieve the purpose of reducing white smoke, a large amount of water and white mist are removed, and at the same time, harmful substances such as smoke, SO2, NOx and other harmful substances are removed together with the removal of white mist. discharged together.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and does not deviate from the present invention. The present invention can be implemented in other specific forms under the condition of the spirit or basic features. Therefore, the embodiments are to be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the All changes within the meaning and range of the required equivalents are embraced within the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. A high-humidity flue gas particulate matter removal and whitening system, characterized in that its structure comprises a flue gas conveying pipe (1), a plate heat exchanger (2), a waste heat recovery device (3), a drain valve (4), A blower (5), an ambient air discharge pipe (6) and an exhaust pipe (7), the bottom end of the flue gas conveying pipe (1) is plugged into the top end of the plate heat exchanger (2), the plate heat exchanger (2) The middle part of the left end is welded with the upper and lower ends of the waste heat recovery device (3). The bottom of the right end of the heat exchanger (2) is welded, the left end of the top of the ambient air discharge pipe (6) is plugged with the top of the right end of the plate heat exchanger (2), and the top of the left end of the exhaust duct (7) exchanges heat with the plate type. The bottom end of the device (2) is plugged, and the bottom end of the ambient air discharge pipe (6) is plugged with the top end of the middle part of the exhaust pipe (7). 2. A high-humidity flue gas particulate matter removal and whitening system according to claim 1, characterized in that: a dust filter is provided inside the left end of the flue gas conveying pipe (1), and the dust filter is fine and dense network structure. 3 . The high-humidity flue gas particulate matter removal and whitening system according to claim 1 , wherein the plate heat exchanger ( 2 ) is provided with two or more horizontal flat corrugated plate metal sheets. 4 . 4 . The high-humidity flue gas particulate matter removal and whitening system according to claim 1 , wherein the ambient air discharge pipe ( 6 ) is L-shaped. 5 . 5 . The high-humidity flue gas particulate matter removal and whitening system according to claim 1 , wherein the exhaust duct ( 7 ) is U-shaped. 6 . 6 . The high-humidity flue gas particulate matter removal and whitening system according to claim 1 , wherein the outer diameter of the flue gas conveying pipe ( 1 ) is consistent with the inner diameter of the top end of the plate heat exchanger ( 2 ). 7 .