Flue gas waste heat recycling equipment for asphalt concrete preparation

Abstract

The utility model belongs to the technical field of flue gas waste heat recycling, in particular to flue gas waste heat recycling equipment for asphalt concrete preparation, which comprises a shell and a flue gas conveying component, the shell is formed by splicing and combining a front half shell and a rear half shell, one half shell is integrally provided with a medium inlet and a medium outlet, and the other half shell is provided with a flue gas conveying component. A heat preservation cavity is formed between the inner side and the outer side of each half shell. According to the flue gas waste heat recovery device, the flue gas input pipe is matched with the flue gas output pipe, so that the staying time of flue gas in the pipeline is prolonged, the contact efficiency between the flue gas and a medium is improved, waste heat of the flue gas is conveniently and smoothly released and transferred into the medium, the waste heat is completely recovered into the medium, and the waste heat recovery efficiency is improved; meanwhile, the collecting barrel is arranged on the flue gas input pipeline, after dust in the flue gas is separated out, the dust falls into the collecting barrel under the action of the gravity of the dust, and the dust is collected, so that follow-up quick cleaning is facilitated, the situation that the dust is accumulated to block the pipeline is avoided, and stable use is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas waste heat recovery, in particular to a flue gas waste heat recovery device for asphalt concrete preparation. Background Art

[0002] Flue gas waste heat recovery is to recover the high-temperature flue gas discharged from various chemical metallurgical and other equipment, and through the heat exchange between the low-temperature gas and the high-temperature flue gas, heat the air, and then conduct heat between the heated air and water to heat the boiler water, and then use the boiler water for the melting and preparation of the raw materials of asphalt concrete, which has the effect of reducing costs in the field of asphalt concrete preparation.

[0003] When recovering flue gas waste heat, a heat exchange device is needed to absorb the waste heat. During this process, it is necessary to ensure effective contact between the flue gas and the heat-absorbing medium. Therefore, it is necessary to reduce the conveying speed of the flue gas. After the flue gas flow speed slows down, the dust in the flue gas will separate and accumulate in the pipeline. After a long time, the pipeline will be blocked, and the flue gas cannot be transported normally, which is not convenient for use. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a flue gas waste heat recovery device for asphalt concrete preparation, which solves the problem that when the flue gas flow speed is reduced and the heat exchange efficiency between the flue gas and the medium is improved, the dust in the flue gas is easily separated and accumulated in the pipeline.

[0006] (2) Technical Solutions

[0007] The utility model specifically adopts the following technical solutions to achieve the above purposes:

[0008] A flue gas waste heat recovery device for asphalt concrete preparation includes a housing and a flue gas conveying component. The housing is spliced and combined by two front and rear half shells. A medium inlet and a medium outlet are integrally arranged on one of the half shells. A heat preservation cavity is formed between the inner and outer sides of the half shell. And the flue gas input pipe of the flue gas conveying component is arranged in the heat exchange cavity formed between the two half shells. A flue gas output pipe is arranged in the inner cavity of the flue gas input pipe. And a collecting cylinder is integrally arranged at the lower end of the bent part of the flue gas input pipe. A sealing cover is arranged at the end of the collecting cylinder.

[0009] Furthermore, both ends of the smoke inlet pipe extend to the outside through the mounting slot provided on the outer shell, one end of the smoke inlet pipe is integrally provided with a first connecting end plate, and the other end of the smoke inlet pipe is fixedly connected with a sealing head, in which a sealing ring is provided, the cavity at the bending part of the smoke inlet pipe is connected with the internal cavity of the collecting tube, and the lower end of the collecting tube extends to the outside through the mounting slot on the outer shell, and the outer wall of the collecting tube and the mounting slot are filled with sealing glue.

[0010] Furthermore, one end of the smoke output pipe located inside the smoke input pipe is closed, the sealing plate integrally provided on the smoke output pipe is embedded in the sealing head, and the end of the smoke output pipe located outside the smoke input pipe is integrally provided with a second connecting end plate.

[0011] Furthermore, side plates are integrally provided on the half shells of the outer shell, the side plates are fixedly connected by clamping strips, and a pressure relief valve is arranged on one of the half shells.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a flue gas waste heat recovery device for asphalt concrete preparation, which has the following beneficial effects:

[0014] The utility model utilizes the cooperation between the smoke input pipe and the smoke output pipe to prolong the time that the smoke stays in the pipe, improves the contact efficiency between the smoke and the medium, and facilitates the smoke to release the waste heat smoothly and transfer it to the medium, recovers all the waste heat into the medium, and improves the efficiency of waste heat recovery. At the same time, a collecting tube is arranged on the smoke input pipe. After the dust in the smoke is separated, the dust falls into the collecting tube under the action of its own gravity, and the dust is collected for subsequent rapid cleaning, thereby avoiding dust accumulation and clogging the pipe, and ensuring stable use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the housing in the utility model;

[0017] Figure 3 It is a cross-sectional view of the smoke conveying component in the utility model.

[0018] In the figure: 1. Outer shell; 101. Side plate; 102. Card strip; 103. Pressure relief valve; 104. Medium inlet; 105. Medium outlet; 106. Placement notch; 107. Heat preservation cavity; 108. Heat exchange cavity; 2. Flue gas conveying assembly; 201. Flue gas input pipe; 2011. First connection end plate; 2012. Plugging head; 2013. Sealing ring; 202. Collection cylinder; 203. Plugging cover; 204. Flue gas output pipe; 2041. Plugging plate; 2042. Second connection end plate. Specific embodiments

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment

[0021] As Figure 1 、 Figure 2 and Figure 3 shown, a flue gas waste heat recovery device for asphalt concrete preparation proposed in an embodiment of the present invention includes an outer shell 1 and a flue gas conveying assembly 2. The outer shell 1 is formed by splicing two half shells in the front and back to form a stable shell, and the flue gas conveying assembly 2 is fixed, so that during the flue gas conveying process, the waste heat in the flue gas is recovered. A medium inlet 104 and a medium outlet 105 are integrally arranged on one of the half shells, facilitating the smooth injection of the heat exchange medium into the internal heat exchange cavity 108 of the outer shell 1 to absorb the waste heat released by the flue gas, achieving the recovery of flue gas waste heat. A heat preservation cavity 107 is formed between the inner and outer sides of the half shell, reducing the heat loss inside the outer shell 1 and improving the efficiency of waste heat recovery to achieve stable use. Moreover, the flue gas input pipe 201 of the flue gas conveying assembly 2 is arranged in the heat exchange cavity 108 formed between the two half shells, facilitating the transfer of waste heat from the flue gas in the flue gas input pipe 201 to the heat exchange cavity 108, thereby effectively recovering and utilizing the waste heat of the flue gas. A flue gas output pipe 204 is arranged in the inner cavity of the flue gas input pipe 201. By using the cooperation between the two pipes, the residence time of the flue gas in the pipe is extended, facilitating the smooth release of waste heat from the flue gas and improving the efficiency of waste heat recovery. In addition, a collection cylinder 202 is integrally arranged at the lower end of the bent part of the flue gas input pipe 201, and a plugging cover 203 is arranged at the end of the collection cylinder 202. The end of the collection cylinder 202 is plugged by the plugging cover 203, so that the dust separated from the flue gas can be concentrated in the collection cylinder 202, facilitating the subsequent effective cleaning operation of the dust.

[0022] As Figure 1 and Figure 3 shown, in some embodiments, both ends of the flue gas inlet pipe 201 extend to the outside through the placement notches 106 provided on the housing 1, facilitating the stable installation of the flue gas inlet pipe 201 between the two half-shells, ensuring stable use when they are fitted together. One end of the flue gas inlet pipe 201 is integrally provided with a first connection end plate 2011, facilitating stable connection to the high-temperature flue gas conveying pipeline, so as to smoothly input the high-temperature flue gas that needs to recover waste heat into the cavity inside the pipeline, enabling the flue gas to release waste heat in the cavity of the pipeline, achieving the purpose of flue gas waste heat recovery. And the other end of the flue gas inlet pipe 201 is fixedly connected with a plugging head 2012, and a sealing ring 2013 is arranged in the plugging head 2012. The cooperation between the plugging head 2012 and the plugging plate 2041 is used to block one end of the flue gas inlet pipe 201, so that the flue gas can stay inside the flue gas inlet pipeline 201 and release waste heat. The sealing ring 2013 ensures stable sealed connection between the two, achieving stable use. During use, the cooperation between the flue gas inlet pipe 201 and the flue gas outlet pipe 204 is utilized to extend the residence time of the flue gas in the pipeline, ensuring that the flue gas can release all the waste heat and improving the efficiency of waste heat recovery;

[0023] The cavity at the bent part of the flue gas inlet pipe 201 is communicated with the internal cavity of the collection cylinder 202, ensuring that the dust separated when the flue gas stays in the pipeline can fall into the collection cylinder 202 under the action of its own gravity, collecting the dust for subsequent rapid cleaning. And the lower end of the collection cylinder 202 extends to the outside through the placement notch 106 on the housing 1, and sealing glue is filled between the outer wall of the collection cylinder 202 and the placement notch 106, facilitating effective collection of the dust separated from the flue gas and convenient subsequent cleaning, improving the convenience of use.

[0024] As Figure 3 shown, in some embodiments, one end of the flue gas outlet pipe 204 located inside the flue gas inlet pipe 201 is closed, and uniformly distributed gas perforations are provided on the flue gas outlet pipe 204 to ensure that the flue gas in the flue gas inlet pipe 201 can smoothly enter the flue gas outlet pipe 204 and then smoothly discharge the flue gas. The plugging plate 2041 integrally provided on the flue gas outlet pipe 204 is fitted in the plugging head 2012, and the cooperation between the two is used to stably block one end of the flue gas inlet pipe 201, so that the flue gas can stay in the cavity inside the pipeline and release waste heat during the residence of the flue gas, completing the recovery of flue gas waste heat. The end of the flue gas outlet pipe 204 located outside the flue gas inlet pipe 201 is integrally provided with a second connection end plate 2042, facilitating the stable connection of the flue gas discharge pipeline to the flue gas outlet pipe 204 and smoothly discharging the flue gas that has entered the pipeline interior.

[0025] As Figure 1 and Figure 2 shown, in some embodiments, side plates 101 are integrally provided on the half shells of the outer shell 1, and the side plates 101 are fixedly connected by clamping bars 102. The two half shells are stably spliced together by the cooperation of the side plates 101 and the clamping bars 102 to form the outer shell 1 of a heat exchanger, ensuring stable use. At the same time, a gasket is arranged between the two side plates 101 to ensure stable sealed connection between them, guaranteeing stable use. And a pressure relief valve 103 is arranged on one of the half shells, facilitating the opening of the pressure relief valve 103 to relieve pressure when the pressure in the heat exchange cavity 108 inside the outer shell 1 is greater than the set value. After the pressure reaches the safe range, the pressure relief valve 103 automatically closes to stop relieving pressure, ensuring that it is always within the safe pressure range, avoiding excessive pressure, and guaranteeing long-term stable use.

[0026] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A flue gas waste heat recovery device for asphalt concrete preparation, comprising a housing (1) and a flue gas conveying assembly (2), characterized in that: The outer shell (1) is formed by splicing and combining two half shells, namely a front half shell and a rear half shell. A medium inlet (104) and a medium outlet (105) are integrally provided on one of the half shells. A heat preservation cavity (107) is formed between the inner and outer sides of the half shell. The flue gas input pipe (201) of the flue gas conveying assembly (2) is arranged in a heat exchange cavity (108) formed between the two half shells. A flue gas output pipe (204) is arranged in the inner cavity of the flue gas input pipe (201). And a collecting cylinder (202) is integrally provided at the lower end of the bent part of the flue gas input pipe (201). A sealing cover (203) is arranged at the end of the collecting cylinder (202).

2. The flue gas waste heat recovery device for asphalt concrete preparation according to claim 1, characterized in that: Both ends of the flue gas input pipe (201) extend to the outside through the installation notch (106) provided on the outer shell (1). A first connection end plate (2011) is integrally provided at one end of the flue gas input pipe (201). And a plugging head (2012) is fixedly connected to the other end of the flue gas input pipe (201). A sealing ring (2013) is arranged in the plugging head (2012).

3. The flue gas waste heat recovery device for asphalt concrete preparation according to claim 2, wherein: The cavity at the bent part of the flue gas input pipe (201) is communicated with the inner cavity of the collecting cylinder (202). And the lower end of the collecting cylinder (202) extends to the outside through the installation notch (106) on the outer shell (1). And sealing glue is filled between the outer wall of the collecting cylinder (202) and the installation notch (106).

4. A flue gas waste heat recovery device for asphalt concrete preparation according to claim 1, characterized in that: One end of the flue gas output pipe (204) located inside the flue gas input pipe (201) is closed. A plugging plate (2041) integrally provided on the flue gas output pipe (204) is fitted in the plugging head (2012). A second connection end plate (2042) is integrally provided at the end of the flue gas output pipe (204) located outside the flue gas input pipe (201).

5. A flue gas waste heat recovery device for asphalt concrete preparation according to claim 1, characterized in that: Side plates (101) are integrally provided on the half shell of the outer shell (1). The side plates (101) are fixedly connected by clamping bars (102). And a pressure relief valve (103) is arranged on one of the half shells.

Images