Boiler flue gas waste heat recovery device

Abstract

The invention relates to the technical field of waste heat recovery devices, in particular to a boiler flue gas waste heat recovery device which comprises a flue gas pipe provided with a branch pipe and used for discharging boiler flue gas, and further comprises a smoke dust adsorption assembly used for containing the boiler flue gas discharged through the branch pipe and comprising a smoke guide bin with the two ends communicated, the inner bin unit is detachably mounted in the smoke guide bin; the heat recovery part comprises a smoke inlet unit and a smoke exhaust unit which are communicated and connected through a heat conduction smoke pipe, and the smoke inlet unit is communicated and connected to the smoke outlet end of the smoke guide bin; a sleeve bin is arranged outside the heat-conducting smoke pipe; the smoke content in the smoke can be reduced through the arranged smoke adsorption assembly, and the problem that the heat exchange efficiency is low due to the fact that smoke is accumulated in the heat conduction smoke pipe is solved; meanwhile, the arranged heat recovery part can reduce flue gas emission pollution and realize flue gas waste heat recovery; the whole device is reliable in waste heat recovery efficiency and convenient to overhaul and maintain, the problem that the device is blocked or damaged by smoke dust is solved, and the overhaul period of the device is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste heat recovery devices, in particular to a boiler flue gas waste heat recovery device. BACKGROUND

[0002] In the field of energy utilization, boilers, as an important energy conversion equipment, are widely used in industrial production, central heating and many other scenes. During the operation of the boiler, a large amount of high-temperature flue gas is generated, which contains a large amount of heat energy that has not been fully utilized, i.e. waste heat. The total amount of waste heat discharged by industrial boilers annually is huge. If it can be effectively recovered and utilized, it can not only significantly improve the energy utilization efficiency, but also greatly reduce energy waste, which is of great significance to alleviate the energy shortage, reduce production costs and reduce environmental pollution.

[0003] However, the existing boiler waste heat recovery technology and device on the market has many shortcomings. The flue gas heat recovery is not good, and the waste heat cannot be fully utilized, which has low practicality. Because the composition of flue gas is complex and contains a large amount of dust particles, direct discharge will cause serious pollution, and a large amount of dust particles adhering will also affect the heat exchange efficiency of the flue gas pipeline.

[0004] In view of the above, it is necessary to develop a boiler flue gas waste heat recovery device to realize effective and reliable waste heat recovery. In view of this, we propose a boiler flue gas waste heat recovery device. SUMMARY

[0005] The purpose of the present application is to solve the problems mentioned in the background art and provide a boiler flue gas waste heat recovery device.

[0006] In order to solve the above technical problems, the present application adopts the following technical scheme: A boiler flue gas waste heat recovery device, comprising a flue gas pipe provided with a branch pipe for discharging boiler flue gas, further comprising: A dust adsorption assembly for receiving boiler flue gas discharged through the branch pipe, comprising a smoke guide house provided at both ends, and an inner house unit detachably installed in the smoke guide house; A heat recovery part comprising an inlet smoke unit and an exhaust smoke unit connected by a heat-conducting smoke pipe, the inlet smoke unit being connected to the outlet smoke end of the smoke guide house; The heat-conducting smoke pipe is provided with a sleeve house outside, and the sleeve house is used for heat exchange with the heat-conducting smoke pipe through circulating liquid.

[0007] Optionally, the branch pipe is detachably installed with a connecting pipe through a through pipe, and the connecting pipe is installed with a fan aligned with the position of the smoke guide house.

[0008] Optionally, the smoke guide house is provided with a bearing socket for inserting the inner house unit, and the bearing socket is detachably installed with an encapsulation plate for encapsulation. The inner bin unit is provided with a hole blocking disc detachably installed at both ends.

[0009] Optionally, the embedded bin is provided with an adsorption cavity between the hole blocking discs at both ends, and the adsorption cavity is filled with adsorption filler for adsorbing smoke dust particles.

[0010] Optionally, the smoke guide bin is in a cylindrical structure at the bearing seat, and is in a circular table structure with a diameter shrinking from inside to outside at both ends of the bearing seat.

[0011] Optionally, the smoke inlet unit comprises a heat storage bin provided with a first hole plate, and the first hole plate is provided with a first mounting hole. The smoke exhaust unit comprises a dust accumulation bin provided with a second hole plate, and the second hole plate is provided with a second mounting hole corresponding to the first mounting hole.

[0012] Optionally, a heat conduction smoke pipe is installed between the first mounting hole and the second mounting hole, and the heat conduction smoke pipe is in a wave structure.

[0013] Optionally, the dust accumulation bin is provided with a through hole for discharging the heat exchanged flue gas, and the through hole is provided with a filter plate.

[0014] Optionally, the heat storage bin is filled with metal heat conduction fins or metal heat conduction particles.

[0015] Optionally, a sleeve bin is sleeved outside the heat conduction smoke pipe and the heat storage bin, and the sleeve bin is provided with an inlet pipe and an outlet pipe for circulating heat exchange liquid.

[0016] Compared with the prior art, the beneficial effects of the present application are: The boiler flue gas waste heat recovery device can reduce the content of smoke dust in the flue gas, slow down the problem of low heat exchange efficiency caused by the accumulation of smoke dust on the heat conduction smoke pipe, and can reduce the pollution of flue gas emission and realize flue gas waste heat recovery. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification are used to provide a further understanding of the present application, and the schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. Figure 1 is one of the overall structure schematic diagrams of the present application; Figure 2 is the second overall structure schematic diagram of the present application; Figure 3 is an overall structure exploded view of the present application; Figure 4 is an exploded view of the smoke dust adsorption assembly of the present application; Figure 5 This is an exploded view of the inner compartment unit of the present invention; Figure 6 This is a schematic diagram of the heat recovery section of the present invention; Figure 7 This is a schematic diagram of the heat recovery section of the present invention; Figure 8 This is a cross-sectional schematic diagram of the heat recovery section of the present invention; Figure 9 This is a schematic diagram of the smoke inlet unit of the present invention; Figure 10 This is a schematic diagram of the smoke exhaust unit of the present invention.

[0018] The meanings of the labels in the diagram are as follows: 1. Flue gas pipe; 101. Branch pipe; 2. Conductor pipe; 3. Connecting pipe; 4. Valve plate; 5. Fan; 6. Smoke and dust adsorption assembly; 61. Smoke guide chamber; 611. Supporting seat; 62. Encapsulation plate; 63. Inner chamber unit; 631. Chamber; 632. Perforated baffle; 6301. Adsorption chamber; 7. Heat recovery unit; 71. Smoke inlet unit; 711. Heat storage chamber; 712. First perforated plate; 7121. First mounting hole; 72. Smoke exhaust unit; 721. Dust accumulation chamber; 7211. Opening; 722. Second perforated plate; 7221. Second mounting hole; 723. Filter plate; 73. Heat-conducting smoke pipe; 74. Enclosure; 741. Liquid inlet pipe; 742. Liquid outlet pipe. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-10 The present invention will describe the above technical solution in detail through the following embodiments: A boiler flue gas waste heat recovery device is provided in this embodiment. A flue gas pipe 1 is provided for connecting to the boiler chimney to facilitate the discharge of flue gas. Specifically, the flue gas pipe 1 is provided with a branch pipe 101. A connecting pipe 3 is detachably installed at the branch pipe 101 through a guide pipe 2. In order to better draw in flue gas, a fan 5 is installed in the connecting pipe 3. The fan 5 draws air outward, so that the flue gas flows through the branch pipe 101 to the connecting pipe 3. It should be noted that in this embodiment, a valve plate 4 is inserted between the branch pipe 101 and the guide pipe 2. In order not to affect normal use, the device is only connected to the boiler chimney channel. When not performing waste heat recovery or maintenance, the valve plate 4 can be directly closed to prevent flue gas from escaping from the device channel.

[0021] like Figures 1-3 Based on the positional relationship, in this embodiment, a dust adsorption assembly 6 for collecting boiler flue gas discharged through branch pipe 101 is installed at the end of the connecting pipe 3; for example... Figure 4 and Figure 5 As shown in the diagram, the smoke adsorption assembly 6 includes a smoke guide chamber 61 with both ends open. It should be noted that in this embodiment, the smoke guide chamber 61 is located at the support base 611 and the chamber 631 has a cylindrical structure. However, the structure at both ends of the smoke guide chamber 61 is a frustum-shaped structure with the diameter shrinking from the inside to the outside. The structure of the smoke guide chamber 61 is necessary because the flow rate of the flue gas will slow down after entering due to the increased diameter. The purpose of slowing down is to better increase the contact time with the inner chamber unit 63 installed in the smoke guide chamber 61. A sealing plate 62 for sealing is detachably installed at the support base 611 to facilitate the disassembly, replacement or cleaning of the inner chamber unit 63.

[0022] like Figure 5 As shown in the structure, the inner chamber unit 63 in this example includes an embedded chamber 631 with perforated baffles 632 that are detachably threaded at both ends. An adsorption chamber 6301 is provided between the perforated baffles 632 at both ends of the embedded chamber 631. In order to absorb odors in the flue gas and adsorb and retain some solid flue gas impurities, activated carbon particles are filled into the adsorption chamber 6301 as adsorption filler in this embodiment. It should be noted that the flue gas temperature in this part is relatively high, and the filter screen is prone to clogging or damage. It is also necessary to remove some flue gas impurities to avoid clogging the heat-conducting flue pipe 73 and affecting the heat exchange efficiency during the subsequent heat exchange process.

[0023] like Figure 3 , Figures 6-8 As shown in the structure, in this embodiment, the heat recovery unit 7 includes a smoke inlet unit 71 and a smoke exhaust unit 72 connected by a heat-conducting flue 73. The smoke inlet unit 71 is connected to the smoke outlet end of the smoke guide chamber 61, meaning that the flue gas will sequentially pass through the smoke inlet unit 71, flow through the heat-conducting flue 73, and then be discharged from the smoke exhaust unit 72. To improve the waste heat recovery efficiency, in this embodiment, as shown in the diagram... Figure 9 The structure shown includes a smoke inlet unit 71 comprising a heat storage chamber 711 on which a first perforated plate 712 is installed. The first perforated plate 712 has a first mounting hole 7121. In this embodiment, the heat storage chamber 711 is made of aluminum profile and is filled with copper heat-conducting particles, which can quickly transfer the heat of the hot flue gas to the copper heat-conducting particles, avoiding the problem of a large amount of waste heat loss during rapid smoke exhaust and improving the heat recovery rate through heat storage.

[0024] Specifically, the smoke exhaust unit 72 includes a dust collection bin 721 with a second perforated plate 722 installed. The second perforated plate 722 has second mounting holes 7221 that correspond one-to-one with the first mounting holes 7121. The heat-conducting smoke pipe 73 is installed between the first mounting holes 7121 and the second mounting holes 7221. The heat-conducting smoke pipe 73 has a wavy structure and is made of copper, which can improve the heat exchange contact area.

[0025] This implementation example Figure 8 As shown, the jacket 74 is installed outside the heat conduction flue 73 and the heat storage chamber 711. The jacket 74 is provided with an inlet pipe 741 and an outlet pipe 742 for circulating heat exchange liquid. Cooling liquid is injected into the jacket 74 through the inlet pipe 741 and the outlet pipe 742 as heat exchange liquid to realize the heat exchange and recovery of waste heat.

[0026] Ultimately, the flue gas still needs to be discharged. At this time, the flue gas temperature drops, which will not damage the filter screen and other structures, and the ash content decreases. Therefore, the flue gas exhaust unit 72 includes a dust collection bin 721 with an opening 7211 for discharging the flue gas after heat exchange. A filter plate 723 is installed at the opening 7211, and the dust can be further accumulated in the dust collection bin 721.

[0027] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of the present invention involve descriptions such as "first," "second," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description; therefore, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention.

Claims

1. A boiler flue gas waste heat recovery device, comprising a flue gas pipe (1) with branch pipes (101) for discharging boiler flue gas, characterized in that: Also includes: The flue gas adsorption assembly (6) is used to collect the boiler flue gas discharged through the branch pipe (101), including a flue gas guide chamber (61) with both ends open, and an inner chamber unit (63) that can be detachably installed in the flue gas guide chamber (61). The heat recovery unit (7) includes a smoke inlet unit (71) and a smoke exhaust unit (72) connected by a heat-conducting smoke pipe (73), wherein the smoke inlet unit (71) is connected to the smoke outlet end of the smoke guide chamber (61); The heat-conducting flue (73) is provided with a jacket (74) outside, which is used to exchange heat with the heat-conducting flue (73) through circulating liquid.

2. The boiler flue gas waste heat recovery device as described in claim 1, characterized in that: The branch pipe (101) is detachably connected to a connecting pipe (3) via a guide pipe (2), and a fan (5) aligned with the position of the smoke chamber (61) is installed inside the connecting pipe (3).

3. The boiler flue gas waste heat recovery device as described in claim 2, characterized in that: The smoke guide chamber (61) is provided with a support bracket (611) for inserting the inner chamber unit (63), and a sealing plate (62) for sealing is detachably installed at the support bracket (611). The inner compartment unit (63) includes a compartment (631) with perforated baffles (632) detachably mounted at both ends.

4. The boiler flue gas waste heat recovery device as described in claim 3, characterized in that: The insert (631) is located between the perforated baffles (632) at both ends and has an adsorption chamber (6301) filled with adsorption filler for adsorbing dust particles.

5. The boiler flue gas waste heat recovery device as described in claim 4, characterized in that: The smoke guide chamber (61) is located at the bearing seat (611) and the chamber (631) has a cylindrical structure. The smoke guide chamber (61) at both ends of the bearing seat (611) has a frustum-shaped structure with a diameter that shrinks from the inside to the outside.

6. The boiler flue gas waste heat recovery device as described in claim 1, characterized in that: The smoke inlet unit (71) includes a heat storage chamber (711) on which a first perforated plate (712) is installed, and the first perforated plate (712) is provided with a first mounting hole (7121). The smoke exhaust unit (72) includes a dust collection bin (721) on which a second perforated plate (722) is installed. The second perforated plate (722) is provided with second mounting holes (7221) that correspond one-to-one with the first mounting holes (7121).

7. The boiler flue gas waste heat recovery device as described in claim 6, characterized in that: The heat-conducting flue (73) is installed between the first mounting hole (7121) and the second mounting hole (7221), and the heat-conducting flue (73) has a wavy structure.

8. The boiler flue gas waste heat recovery device as described in claim 6, characterized in that: The dust collection chamber (721) is provided with an opening (7211) for discharging the flue gas after heat exchange, and a filter plate (723) is installed at the opening (7211).

9. The boiler flue gas waste heat recovery device as described in claim 6, characterized in that: The heat storage chamber (711) is filled with metal heat-conducting fins or metal heat-conducting particles.

10. The boiler flue gas waste heat recovery device as described in claim 9, characterized in that: The jacket (74) is fitted outside the heat conduction flue (73) and the heat storage chamber (711), and the jacket (74) is provided with an inlet pipe (741) and an outlet pipe (742) for circulating heat exchange liquid.

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