Condensate water recovery device for flue gas waste heat recovery heat exchanger

Abstract

The invention relates to the technical field of condensate water recovery, in particular to a condensate water recovery device for a flue gas waste heat recovery heat exchanger, which comprises a first cavity, a second cavity and a third cavity which are respectively arranged in parallel in a box body, a condensate water inlet is arranged on the wall of the first cavity, and a condensate water outlet is arranged on the third cavity. A filter plate is adaptively arranged at the 1 / 3 position of the bottom of the inner cavity of the second cavity, a filter plate A is adaptively arranged in the middle of the inner cavity of the third cavity, and the filter plate and the filter plate A are respectively used for filtering condensate water; according to the condensate water recovery device, through three times of filtration, the problem that the iron content in condensate water exceeds the standard is solved, the condensate water directly supplies water to a boiler, and waste of the condensate water is reduced; the device is good in filtering effect, simple and convenient to operate, simple in structure, low in manufacturing cost and suitable for recycling condensate water of various waste heat exchangers, and resource waste is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of condensate recovery, and in particular to a condensate recovery device for a flue gas waste heat recovery heat exchanger. Background Art

[0002] The flue gas temperature of a boiler is about 150 °C, and that of a steam boiler is about 200 °C. Nitrogen oxides and water vapor that cannot form condensate are discharged into the air together, causing air pollution.

[0003] Generally, it is the simplest and most feasible way to use the recovered steam condensate for boiler feed water. Many projects also considered the steam condensate recovery system during construction, using an open tank and a condensate tank to recover steam condensate, and then directly using it as boiler make-up water or mixing it with softened water as boiler make-up water. However, in practice, the vast majority of open condensate recovery systems cannot be used normally. The main reasons are as follows: The quality of the recovered condensate cannot meet the requirements of the boiler feed water index for oil-fired and gas-fired boilers. Through simple chemical tests, the hardness of the condensate detected by the titration method used on the simple chemical test bench in the boiler room is unqualified, generally greater than 0.03 mmol / L, and in some cases, the titration endpoint cannot even appear. Therefore, it cannot be directly fed into the boiler and has to be discharged; the condensate of some boilers is yellow or red water. By checking the pH value of the water sample, it is generally less than 7, which is weakly acidic. Through more accurate chemical analysis of the water quality components, it is found that the reason for the unqualified hardness test of the condensate is the interference of iron ions in the water, rather than the true hardness of calcium and magnesium ions. The generally recognized reason for the excessive iron content in the condensate is that the open system is in communication with the air, and oxygen and carbon dioxide in the air cause oxygen corrosion and acidic corrosion to carbon steel in a high-temperature and humid environment. The corrosion products dissolve into the condensate, resulting in a deterioration of the water quality index and an excessive iron content in the condensate. Most of the current condensing boilers do not have a condensate recovery device in the flue gas waste heat section, and thus cannot completely avoid the corrosion of the heat exchanger caused by the reflux of flue gas condensate, resulting in an excessive iron ion content in the condensate and the problem that it cannot be directly used as boiler make-up water.

[0004] Therefore, the present application provides a condensate recovery device for a flue gas waste heat recovery heat exchanger to solve the problems raised in the above background art. Summary of the Invention

[0005] The purpose of the present invention is to provide a condensate recovery device for a flue gas waste heat recovery heat exchanger to solve the problem that the iron content in the condensate exceeds the standard in the existing background art and it cannot be directly used as boiler make-up water.

[0006] To solve the above technical problems, the present invention provides a condensate recovery device for a flue gas waste heat recovery heat exchanger, which includes a box body. A first cavity, a second cavity, and a third cavity are arranged in parallel in the box body. A condensate inlet is provided on the wall of the first cavity, a condensate outlet is provided on the third cavity, a filter plate is adaptively arranged at the 1 / 3 position from the bottom of the inner cavity of the second cavity, and a filter plate A is adaptively arranged in the middle of the inner cavity of the third cavity. The filter plate and the filter plate A are respectively used for filtering condensate water.

[0007] A further improvement of the technical solution of the present invention is that: a filter plate A is adaptively arranged in the middle of the inner cavity of the third cavity. A perforation A for adapting to a second water pipe is arranged through the body of the filter plate A. The water outlet of the second water pipe is located at the bottom surface of the body of the filter plate A, and a plurality of filter holes 94 are arranged on the filter plate A9.

[0008] A further improvement of the technical solution of the present invention is that: the body of the filter plate A is a frame-shaped body, and a filter cotton is adaptively installed in its frame-shaped body. A plurality of perforations B are arranged on the body of the filter cotton.

[0009] A further improvement of the technical solution of the present invention is that: a filter plate is adaptively arranged at the 1 / 3 position from the bottom of the inner cavity of the second cavity. A plurality of perforations are arranged on the body of the filter plate, and an activated carbon adsorption plate is adaptively placed on the upper surface against the filter plate. A plurality of perforations C are arranged on the body of the activated carbon adsorption plate.

[0010] A further improvement of the technical solution of the present invention is that: a first water pipe is installed in the inner cavity of the second cavity, and the water outlet of the first water pipe extends below the body of the filter plate.

[0011] A further improvement of the technical solution of the present invention is that: an inlet pipe is installed in the inner cavity of the first cavity. A duckbill head is adaptively installed at the water outlet of the inlet pipe. The body of the duckbill head is communicated with the inlet pipe. A long groove-shaped water outlet is arranged on the bottom end surface of the duckbill head, and the water outlet is close to the inner wall of the box body.

[0012] A further improvement of the technical solution of the present invention is that: the inclined angle of the forward inclined surface of the body of the duckbill head is 45-75 degrees, and the inclined angle of the reverse inclined surface A of the body of the duckbill head is 15-45 degrees.

[0013] A further improvement of the technical solution of the present invention is that: the inner cavity sizes of the first cavity, the second cavity, and the third cavity are the same, and the bottom of their inner cavities is a funnel-shaped body.

[0014] A further improvement of the technical solution of the present invention is that: a first sewage outlet, a second sewage outlet, and a third sewage outlet are respectively installed on the bottom end surfaces of the funnel-shaped bodies at the bottoms of the inner cavities of the first cavity, the second cavity, and the third cavity.

[0015] A further improvement of the technical solution of the present invention is that: the condensate inlet, the inlet pipe, the first water pipe, the second water pipe, and the condensate outlet are all located in the upper 1 / 4 area of the box body.

[0016] Adopting the above technical solution, the present invention has the following beneficial effects:

[0017] 1. A condensate recovery device for a flue gas waste heat recovery heat exchanger provided by the present invention. This condensate recovery device solves the problem of excessive iron content in condensate through three-chamber filtration, realizes direct boiler make-up water with condensate, and reduces the waste of condensate. In practical applications, this device has good filtration effect, is easy to operate, has a simple structure, and low construction cost. It is applicable to the condensate recovery and reuse of various waste heat heat exchangers, greatly reducing resource waste.

[0018] 2. A condensate recovery device for a flue gas waste heat recovery heat exchanger provided by the present invention. Through the funnel-shaped body at the bottom of the first chamber, impurities and iron filings in the recovered condensate can be effectively sunk to the bottom of the chamber to complete the first rough filtration. An inlet pipe is installed in the upper 1 / 4 area of the chamber. A duckbill head is installed at the low end of the inlet pipe body. The inclined angle of the forward inclined surface of the duckbill head body is 45-75 degrees, and the inclined angle of the reverse inclined surface A of the duckbill head body is 15-45 degrees. The duckbill head outlet is close to the chamber wall. By setting the inclined angle of the duckbill head, the buffer of the outlet to the impurities that have settled at the bottom of the chamber is greatly reduced, further improving the filtration effect of the first chamber.

[0019] 3. A condensate recovery device for a flue gas waste heat recovery heat exchanger provided by the present invention. A filter plate is fixedly arranged at the lower 1 / 3 of the inner cavity of the second chamber. A number of through holes are arranged on the filter plate body. An activated carbon adsorption plate is placed on this filter plate. The activated carbon adsorption plate can effectively adsorb iron ions, heavy metal ions, acidic dissolved substances and corrosive dissolved substances in the condensate on the activated carbon adsorption plate. A plurality of through holes C are arranged on the activated carbon adsorption plate body. Some iron ions, heavy metal ions, acidic dissolved substances and corrosive dissolved substances are blocked in the through holes C. By regularly replacing the activated carbon adsorption plate, iron ions, heavy metal ions, acidic dissolved substances and corrosive dissolved substances in the condensate are effectively filtered, further purifying the condensate, realizing direct boiler make-up water, and reducing resource waste.

[0020] 4. A condensate recovery device for a flue gas waste heat recovery heat exchanger provided by the present invention. A filter plate A is adaptively installed in the middle of the inner cavity of the third chamber. The filter plate A is fixed by a plurality of clamping blocks arranged on the inner wall of the chamber. A filter cotton is adaptively installed on the lower surface of the filter plate A. A plurality of through holes B are arranged on the filter cotton. This filter cotton is a glass fiber filter plate or a synthetic fiber filter plate, further filtering microorganisms and harmful substances in the condensate. At the same time, this filter plate can reduce floating substances in the condensate, further purifying and filtering the condensate to realize high-purity boiler make-up water. Description of the Drawings

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is an overall schematic diagram of a condensate recovery device for a flue gas waste heat recovery heat exchanger;

[0023] Figure 2 It is a three-dimensional structure schematic diagram of a condensate recovery device for a flue gas waste heat recovery heat exchanger;

[0024] Figure 3 It is a schematic diagram of the internal structure of the box body;

[0025] Figure 4 It is a schematic diagram of the structure of filter plate A;

[0026] Figure 5 It is a schematic diagram of the structure of filter cotton;

[0027] Figure 6 It is a schematic diagram of the structure of the activated carbon adsorption plate;

[0028] Figure 7 It is a schematic diagram of the structure of the duckbill head.

[0029] Reference numerals: 1, box body; 2, support frame; 3, condensate inlet; 4, condensate outlet; 5, inlet pipe; 6, first water pipe; 7, second water pipe; 8, filter plate; 9, filter plate A; 10, activated carbon adsorption plate; 11, first cavity; 12, second cavity; 13, third cavity; 14, first sewage outlet; 15, second sewage outlet; 16, third sewage outlet; 51, duckbill head; 52, water outlet; 53, inclined surface; 54, inclined surface A; 81, perforation; 91, perforation A; 92, filter cotton; 93, perforation B; 94, filter hole; 110, perforation C. Specific embodiments

[0030] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0031] 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.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to" 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.

[0033] The present invention will be further explained below in conjunction with specific embodiments.

[0034] Such as Figure 1-7As shown in the figure, a condensate recovery device for a flue gas waste heat recovery heat exchanger provided in this embodiment includes a box body 1. Inside the box body 1, a first cavity 11, a second cavity 12, and a third cavity 13 are arranged in parallel. A condensate inlet 3 is provided on the wall of the first cavity 11, and a condensate outlet 4 is provided on the third cavity 13. Drain ports are provided at the bottom of the inner cavities of the first cavity 11, the second cavity 12, and the third cavity 13. The three drain ports are respectively a first drain port 14, a second drain port 15, and a third drain port 16. The first drain port 14, the second drain port 15, and the third drain port 16 are all funnel-shaped bodies provided at the bottom of the inner cavities of the first cavity 11, the second cavity 12, and the third cavity 13. This funnel-shaped body facilitates the discharge of sediment. The inner cavity sizes of the three first cavities 11, second cavities 12, and third cavities 13 are the same, and users can also customize them according to their own needs. The inner walls of the box body 1 are any one of fiberglass material, plastic material, and stainless steel material. The top of the box body 1 can be covered with a hinge type or a cover type according to user needs to reduce impurities in the condensate; Inlets and outlets for condensate are provided in all three cavities. The condensate inlet 3 of the first cavity 11 is connected to an inlet pipe 5. The first cavity 11 is connected to the second cavity 12 through a first water pipe 6. The second cavity 12 is connected to the third cavity 13 through a second water pipe 7. The third cavity 13 is connected to the condensate outlet 4. The inlets and outlets of the three cavities are all located in the upper 1 / 4 area of the box body 1. Installing the inlets and outlets of each box body at the upper part of the box body 1 facilitates the sedimentation of filtered impurities in the condensate, making the water quality entering the next cavity clean. A filter plate 8 is installed at 1 / 3 of the bottom of the inner cavity of the second cavity 12, and a filter plate A9 is installed in the middle of the inner cavity of the third cavity. The condensate in the cavity is filtered sequentially through the three box bodies, solving the problem of excessive iron content in the condensate, realizing direct boiler water replenishment with the condensate, reducing the waste of condensate. This device has good filtering effect, simple operation, simple structure, and low construction cost, and is applicable to the condensate recovery and reuse of various waste heat heat exchangers, greatly reducing resource waste.

[0035] As Figures 2-5As shown, in this embodiment, a filter plate A9 is adaptively arranged in the middle of the inner cavity of the third cavity 13. The filter plate A9 is placed in the middle area of the third cavity 13 through the clamping blocks on the inner wall of the third cavity 13. The clamping blocks are prior art and will not be elaborated here. A perforation A91 for adapting to the second water pipe 7 is provided through the body of the filter plate A9. The inner diameter of the perforation A91 abuts against the outer wall of the second water pipe 7. The water outlet of the second water pipe 7 extends towards the bottom of the third cavity 13 until the water outlet of the second water pipe 7 is located at the overall bottom surface of the filter plate A9. The body of the filter plate A9 is a frame-shaped body, and the filter plate A9 is made of non-metallic material. A filter cotton 92 is adaptively installed in its frame-shaped body. By setting the filter plate A9 as a frame-shaped body, it is convenient to fold the filter cotton 92 into a corrugated shape. The material of the filter cotton 92 is glass fiber filter cotton or synthetic fiber filter cotton. The filter cotton 92 is multi-layer bent and placed in the frame-shaped body. A plurality of perforations B93 are provided on the body of the filter cotton 92 to increase the filtered water output. The filtered condensed water flows upward from the filter holes 94, and then the qualified condensed water after filtration flows out through the condensate outlet 4; by installing the filter cotton under the lower frame of the filter plate A9, the microorganisms and harmful substances in the condensed water are further filtered. At the same time, the filter plate can reduce the floating substances in the condensed water, further purify and filter the condensed water, and realize high-purity boiler make-up water.

[0036] As Figure 2 , Figure 3 , Figure 6 As shown, in this embodiment, a filter plate 8 is adaptively arranged at the lower 1 / 3 of the inner cavity of the second cavity 12. The filter plate 8 is clamped or fixed by plastic bolts at the lower 1 / 3 of the inner cavity of the second cavity 12. The material of the filter plate 8 is non-metallic material. A plurality of perforations 81 are provided on the body of the filter plate 8. An activated carbon adsorption plate 10 is adaptively placed on the upper surface abutting against the filter plate 8. A plurality of perforations C110 are provided on the body of the activated carbon adsorption plate 10; placing the activated carbon adsorption plate 10 in the second cavity 12 further increases the filtration. The first water pipe 6 is installed in the inner cavity of the second cavity 12. The water outlet of the first water pipe 6 extends below the body of the filter plate 8. The activated carbon adsorption plate is placed on the filter plate. The activated carbon adsorption plate can effectively adsorb the iron ions, heavy metal ions, acidic dissolved substances and corrosive dissolved substances in the condensed water on the activated carbon adsorption plate, further purify the condensed water, realize direct make-up water for the boiler, and reduce the waste of resources.

[0037] As Figure 2 , Figure 3 , Figure 7As shown, in this embodiment, an inlet pipe 5 is installed in the inner cavity of the first cavity 11. A duckbill head 51 is adaptively installed at the water outlet of the inlet pipe 5. The body of the duckbill head 51 is in communication with the inlet pipe 5. A long groove-shaped water outlet 52 is provided on the bottom end surface of the duckbill head 51. The water outlet 52 is close to the inner wall of the box body 1, reducing the disturbance of the water flow to the sediment at the bottom of the cavity. The inclined angle of the inclined surface 53 in the forward direction of the duckbill head 51 body is 45 to 75 degrees, and the preferred inclined angle is 65 degrees. The inclined angle of the inclined surface A54 in the reverse direction of the duckbill head 51 body is 15 to 45 degrees, and the preferred inclined angle is 25 degrees. By changing the duckbill head 51, the disturbance of the water flow at the water inlet to the sediment at the bottom of the cavity is reduced. Instead of using a 90-degree elbow pipe, the duckbill head is used in this application. When the condensed water in the pipeline flows out at high temperature and under pressure, the 90-degree elbow pipe is prone to spouting and oscillation phenomena, resulting in the easy breakage of the 90-degree elbow pipe. By using the duckbill head 51, the impact and oscillation of the water flow are changed, reducing damage. The inlet pipe 5, the first water pipe 6, and the second water pipe 7 in this application are all made of plastic material. There is no filter plate in the first cavity, and the filtration is achieved only through the structure in the first cavity. The bottom of the first cavity is designed as a funnel shape, which can effectively sink the impurities and iron filings in the recovered condensed water to the bottom of the cavity, completing the first rough filtration. At the same time, the water outlet of the duckbill head is close to the cavity wall, and the duckbill head is set at an inclined angle, greatly reducing the buffering of the water outlet to the impurities that have settled at the bottom of the cavity, further improving the filtration effect of the first cavity.

[0038] The present invention also provides the working principle of a condensate recovery device for a flue gas waste heat recovery heat exchanger: The condensate is recovered in the first cavity 11 within the box body 1, and the condensate is roughly filtered through the first cavity 11. The impurities and metal impurities in the condensate precipitate by themselves and fall into the funnel-shaped body of the first cavity 11. The user can regularly discharge the precipitated impurities. An inlet pipe 5 for the condensate is installed at the upper part of the first cavity. A duckbill head 51 is installed at the water outlet end of the inlet pipe 5. The water outlet 52 of the duckbill head 51 body is close to the inner wall of the box body 1. By changing the angle of the duckbill head 51, the disturbance of the water flow at the condensate inlet 3 to the impurity precipitate at the bottom of the first cavity 11 is reduced; A first water pipe 6 communicating with the second cavity 12 is also installed at the upper part of the inner cavity of the first box body 1. The water outlet end of the first water pipe 6 extends to the lower part of the filter plate 8. The filter plate 8 is fixed at the lower 1 / 3 of the second cavity 12. An activated carbon adsorption plate 10 is placed on the filter plate 8. The activated carbon adsorption plate 10 can effectively adsorb iron ions, heavy metal ions, acidic dissolved substances, and corrosive dissolved substances in the condensate within the activated carbon adsorption plate 10 body. By setting the activated carbon adsorption plate 10, the iron ions in the condensate are further purified and removed. Similarly, a second water pipe 7 is installed in the upper 1 / 4 area of the second cavity 12. The second water pipe 7 communicates with the third cavity 13. The water outlet end of the second water pipe 7 extends to the lower part of the filter plate A9 body. A filter cotton 92 with a corrugated body is installed within the filter plate A9 frame. Multiple perforations B93 are provided on the filter cotton 92 body. The filtered condensate flows upward from multiple filter holes 94 in the middle area of the filter plate A9. The condensate that has been filtered three times flows out through the condensate outlet 4. The condensate is regularly collected at the condensate outlet 4 for chemical analysis to ensure that the condensate filtered three times meets the standards and can be directly used to supplement water for the boiler. At the same time, the filter cotton 92 and the activated carbon adsorption plate 10 need to be replaced regularly, and the sewage at the bottom of each cavity needs to be discharged regularly to improve the purity of the filtered condensate and reduce energy loss and waste.

[0039] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A condensate recovery device for a flue gas waste heat recovery heat exchanger, characterized in that, It includes a box body (1). Inside the box body (1), a first cavity (11), a second cavity (12) and a third cavity (13) are arranged side by side. A condensate inlet (3) is provided on the wall of the first cavity (11), and a condensate outlet (4) is provided on the third cavity (13). A filter plate (8) is adaptively arranged at the bottom 1 / 3 of the inner cavity of the second cavity (12), and a filter plate A (9) is adaptively arranged in the middle of the inner cavity of the third cavity (13). The filter plate (8) and the filter plate A (9) are respectively used for filtering condensate water.

2. The condensate recovery device for a flue gas waste heat recovery heat exchanger according to claim 1, wherein A filter plate A (9) is adaptively arranged in the middle of the inner cavity of the third cavity (13). A perforation A (91) for adapting to the second water pipe (7) is provided through the body of the filter plate A (9). The outlet of the second water pipe (7) is located at the bottom surface of the body of the filter plate A (9). A number of filter holes (94) are provided on the filter plate A (9).

3. The condensate recovery device for a flue gas waste heat recovery heat exchanger according to claim 2, characterized in that, The body of the filter plate A (9) is a frame shape, and a corrugated filter cotton (92) is adaptively installed in its frame shape. A number of perforations B (93) are provided on the body of the filter cotton (92).

4. The condensate recovery device for a flue gas waste heat recovery heat exchanger according to claim 1, wherein, A filter plate (8) is adaptively arranged at the lower 1 / 3 of the inner cavity of the second cavity (12). A number of perforations (81) are provided on the body of the filter plate (8). An activated carbon adsorption plate (10) is adaptively placed on the upper surface in contact with the filter plate (8). A number of perforations C (110) are provided on the body of the activated carbon adsorption plate (10).

5. The condensate recovery device for a flue gas waste heat recovery heat exchanger according to claim 4, characterized in that A first water pipe (6) is installed in the inner cavity of the second cavity (12), and the outlet of the first water pipe (6) extends below the body of the filter plate (8).

6. The condensate recovery device for a flue gas waste heat recovery heat exchanger according to claim 1, characterized in that, An inlet pipe (5) is installed in the inner cavity of the first cavity (11). A duckbill head (51) is adaptively installed at the outlet of the inlet pipe (5). The body of the duckbill head (51) is in communication with the inlet pipe (5). A long groove-shaped water outlet (52) is provided at the bottom end surface of the duckbill head (51), and the water outlet (52) is close to the inner wall of the box body (1).

7. The condensate recovery device for a flue gas waste heat recovery heat exchanger according to claim 6, wherein, The inclined angle of the inclined surface (53) in the forward direction of the body of the duckbill head (51) is 45 to 75 degrees, and the inclined angle of the inclined surface A (54) in the reverse direction of the body of the duckbill head (51) is 15 to 45 degrees.

8. The condensate recovery device for a flue gas waste heat recovery heat exchanger according to claim 1, characterized in that, The inner cavity sizes of the first cavity (11), the second cavity (12) and the third cavity (13) are the same, and the bottom of their inner cavities is a funnel shape.

9. The condensate recovery device for a flue gas waste heat recovery heat exchanger according to claim 8, characterized in that, First sewage outlets (14), second sewage outlets (15) and third sewage outlets (16) are respectively installed at the bottom end surfaces of the funnel shapes at the bottoms of the inner cavities of the first cavity (11), the second cavity (12) and the third cavity (13).

10. The condensate recovery device for a flue gas waste heat recovery heat exchanger according to claim 1, wherein, The condensate inlet (3), the inlet pipe (5), the first water pipe (6), the second water pipe (7) and the condensate outlet (4) are all located in the upper 1 / 4 area of the body of the box body (1).

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