Waste gas heat recycling system

Abstract

The utility model provides a waste gas heat recycling system which comprises a filter bin and a heat exchange chamber, the filter bin and the heat exchange chamber are communicated with each other, a filter element bearing cylinder and a filter element are arranged in the filter bin, and the filter element is filled in the filter element bearing cylinder; waste gas to be treated penetrates through the filter element and the filter element bearing cylinder and then enters the heat exchange chamber; a heat exchange mechanism is arranged in the heat exchange chamber, a heat dissipation coil pipe is arranged in the filter element bearing cylinder, the heat dissipation coil pipe is communicated with a shell pass of the heat exchange mechanism, and fluid which exchanges heat with waste gas to be treated is subjected to heat exchange in the heat exchange mechanism, then reaches the heat dissipation coil pipe, cools the filter element bearing cylinder and then leaves the filter bin. According to the utility model, the heat in the filter bin is reduced by recovering the heat of the filter element bearing cylinder, so that the filter element is maintained at a proper temperature for filtering, the reduction of the filtering effect is avoided, the heat is recovered, the heat loss is reduced, and the recovery efficiency of the waste gas heat is improved.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas heat recovery technology, and in particular relates to a waste gas heat recovery and utilization system. Background Technology

[0002] Waste gas heat recovery and utilization systems mainly involve heat exchange equipment to recover and utilize heat from waste gas, reduce heat loss from waste gas, and improve energy utilization efficiency. Most common heat exchange equipment directly uses liquid or gas as a circulating fluid to exchange heat with waste gas within the heat exchange equipment, thereby recovering heat from the waste gas through heat exchange of the circulating fluid.

[0003] Exhaust gases carrying heat often contain a large number of particulate impurities, which are easily deposited in the heat exchange equipment during the heat exchange process. Therefore, filter components are set at the front end of the heat exchange equipment for pretreatment. However, in the existing technology, the filter components need to withstand the high temperature of the exhaust gas. The exhaust gas not only raises the temperature of the filter components, causing a decrease in the filtration effect, but also the heat transferred from the exhaust gas to the filter components during the filtration process is also lost, resulting in low heat recovery of the exhaust gas. Utility Model Content

[0004] This invention provides a waste gas heat recovery and utilization system, which aims to solve the problem that the current filter components need to withstand high-temperature waste gas, which not only raises the temperature of the filter components and reduces the filtration effect, but also causes the heat transferred from the waste gas to the filter components to be lost during the filtration process, resulting in low waste gas heat recovery.

[0005] This utility model is implemented as follows: a waste gas heat recovery and utilization system includes:

[0006] The filter chamber and the heat exchange chamber are interconnected. The filter chamber is equipped with a filter element carrier cylinder and a filter element. The filter element is filled inside the filter element carrier cylinder. The waste gas to be treated passes through the filter element and the filter element carrier cylinder and then enters the heat exchange chamber.

[0007] A heat exchange mechanism, comprising a first partition, a second partition, and heat dissipation fins connecting the first partition and the second partition, wherein the first partition, the second partition, and the heat dissipation fins are disposed inside the heat exchange chamber, and the exhaust gas to be treated reaches the second partition from one side of the first partition through the heat dissipation fins.

[0008] The filter element carrier cylinder is equipped with a heat dissipation coil, which is connected to the shell side of the heat exchange mechanism. The fluid that exchanges heat with the waste gas to be treated reaches the heat dissipation coil after heat exchange in the heat exchange mechanism, and then leaves the filter chamber after cooling the filter element carrier cylinder.

[0009] Preferably, the first and second partitions divide the heat exchange chamber into a first region, a second region, and a third region. The first region and the third region are connected by a heat dissipation fin. The heat dissipation fin traverses the second region. Fluid that exchanges heat with the waste gas to be treated enters the second region and exchanges heat with the waste gas to be treated located in the heat dissipation fin.

[0010] Preferably, the heat dissipation coil is connected to the heat exchange mechanism by a connecting pipe, the outer wall of the filter chamber is provided with a circulating fluid outlet, the outer wall of the heat exchange chamber is provided with a circulating fluid inlet, the circulating fluid inlet enters the heat exchange mechanism tube and then reaches the heat dissipation coil through the connecting pipe, and the end of the heat dissipation coil is connected to the circulating fluid outlet.

[0011] Preferably, the heat dissipation coil includes several sets of straight pipes and bent pipes connected between the straight pipes, and the straight pipes are arranged in a ring array within a receiving cavity provided inside the filter element carrier cylinder.

[0012] Preferably, the filter element carrier cylinder includes a carrier plate and an outer ring, and the filter element is assembled in the cylindrical cavity formed by the carrier plate and the outer ring.

[0013] Preferably, the support plate is provided with vent holes to accommodate exhaust gas.

[0014] Compared with the prior art, the embodiments of this application have the following main advantages:

[0015] The waste gas heat recovery system provided by this utility model collects heat in the heat exchange mechanism and heat dissipation coil of the fluid that recovers heat. In the heat exchange mechanism, the waste gas and the fluid exchange heat using the shell-and-tube heat exchanger principle. The fluid that has recovered heat will continue to reach the heat dissipation coil in the filter element carrier cylinder. The fluid recovers heat from the filter element carrier cylinder, reducing the heat in the filter chamber. On the one hand, this ensures that the filter element in the filter chamber, which performs the filtration function, is maintained at a suitable temperature for filtration, avoiding a decrease in filtration effect. On the other hand, it continues to recover heat, reducing heat loss and improving the efficiency of waste gas heat recovery. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a waste gas heat recovery and utilization system provided by this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of a waste gas heat recovery and utilization system provided by this utility model.

[0018] Figure 3 This is a schematic diagram of the filter element carrier cylinder structure of a waste gas heat recovery and utilization system provided by this utility model.

[0019] Figure 4This is a schematic diagram of the unfolded structure of the heat dissipation coil in a waste gas heat recovery and utilization system provided by this utility model.

[0020] Figure 5 This is a schematic diagram of the internal structure of the filter element carrier cylinder of a waste gas heat recovery and utilization system provided by this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 110. Filter chamber; 120. Heat exchange chamber; 210. Filter element support cylinder; 211. Support plate; 212. Outer ring; 201. Receiving cavity; 220. Filter element; 301. Circulating fluid inlet; 302. Circulating fluid outlet; 310. First partition; 320. Second partition; 330. Heat dissipation fins; 340. Connecting pipe; 350. Heat dissipation coil; 351. Bend; 352. Straight pipe. Detailed Implementation

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] This utility model provides a waste gas heat recovery and utilization system, such as Figures 1-5 As shown, the waste gas heat recovery and utilization system includes:

[0026] The filter chamber 110 and the heat exchange chamber 120 are directly interconnected. The filter chamber 110 contains a filter element carrier 210 and a filter element 220. The filter chamber 110 has an annular seat for fixing the filter element carrier 210, and the filter element 220 is filled inside the filter element carrier 210. The waste gas to be treated must first pass through the filter element 220 and the filter element carrier 210 before entering the heat exchange chamber 120. The waste gas undergoes pre-filtration before entering the heat exchange chamber 120 to reduce the impact of particulate matter in the waste gas on the structure of the heat exchange chamber 120. The filter chamber 110 has a waste gas inlet at the end furthest from the heat exchange chamber 120, and the heat exchange chamber 120 has a waste gas outlet at the end furthest from the filter chamber 110.

[0027] The heat exchange mechanism includes a first partition 310, a second partition 320, and a heat dissipation fin tube 330 connected between the first partition 310 and the second partition 320. The first partition 310, the second partition 320, and the heat dissipation fin tube 330 are disposed inside the heat exchange chamber 120. The waste gas to be treated passes through the heat dissipation fin tube 330 from one side of the first partition 310 to one side of the second partition 320.

[0028] The filter element carrier cylinder 210 is equipped with a heat dissipation coil 350, which is connected to the shell side of the heat exchange mechanism. The fluid that exchanges heat with the waste gas to be treated reaches the heat dissipation coil 350 after heat exchange in the heat exchange mechanism and leaves the filter chamber 110 after cooling the filter element carrier cylinder 210.

[0029] In this embodiment, the fluid that recovers heat collects heat in the heat exchange mechanism and the heat dissipation coil 350. The heat exchange mechanism here uses the shell-and-tube heat exchanger principle to exchange heat between the exhaust gas and the fluid. The fluid that has recovered heat will continue to reach the heat dissipation coil 350 in the filter element carrier cylinder 210. The fluid recovers heat from the filter element carrier cylinder 210, reducing the heat in the filter chamber 110. On the one hand, this ensures that the filter element 220, which performs the filtration function in the filter chamber 110, is maintained at a suitable temperature for filtration, avoiding a decrease in filtration effect. On the other hand, it continues to recover heat, improving the efficiency of heat recovery from the exhaust gas and reducing heat loss.

[0030] As a preferred embodiment of this embodiment, the first partition 310 and the second partition 320 divide the heat exchange chamber 120 into a first region, a second region and a third region. The first region and the third region are connected by a heat dissipation fin 330. The heat dissipation fin 330 traverses the second region. The fluid that exchanges heat with the waste gas to be treated enters the second region and exchanges heat with the waste gas to be treated located in the heat dissipation fin 330.

[0031] In this embodiment, the heat dissipation coil 350 includes several sets of straight tubes 352 and bent tubes 351 connected between the straight tubes 352. The straight tubes 352 are arranged in a ring array within the receiving cavity 201 provided inside the filter element carrier cylinder 210. Here, the heat dissipation coil 350 has a cylindrical shape, and the straight tubes 352 are arranged along the axial direction of the cylindrical groove. The straight tubes 352 are connected to each other in series by the bent tubes 351.

[0032] The heat dissipation coil 350 is connected to the heat exchange mechanism by a connecting pipe 340. The outer wall of the filter chamber 110 is provided with a circulating fluid outlet 302. The outer wall of the heat exchange chamber 120 is provided with a circulating fluid inlet 301. The circulating fluid inlet 301 enters the tube side of the heat exchange mechanism and then reaches the heat dissipation coil 350 through the connecting pipe 340. The end of the heat dissipation coil 350 is connected to the circulating fluid outlet 302.

[0033] In a preferred embodiment of this invention, the filter element carrier cylinder 210 includes a carrier plate 211 and an outer ring 212, and the filter element 220 is assembled in the cylindrical cavity formed by the carrier plate 211 and the outer ring 212; the carrier plate 211 is provided with vent holes for accommodating exhaust gas.

[0034] In this embodiment, the filter chamber 110 is provided with an annular seat for fixing the filter element carrier cylinder 210, and the outer edge of the outer ring body 212 is provided with an annular fixing plate. Here, the fixing plate and the annular seat are sealed together, and the exhaust gas can only reach the heat exchange chamber 120 through the air holes provided on the filter element 220 and the carrier plate 211.

[0035] The filter chamber 110 and the heat exchange chamber 120 are equipped with end caps that can be disassembled. The design of the disassembled end caps is mainly to facilitate the maintenance of the filter element carrier cylinder 210, the filter element 220 and the heat exchange mechanism.

[0036] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A waste gas heat recovery and utilization system, characterized in that, include: The filter chamber (110) and the heat exchange chamber (120) are interconnected. The filter chamber (110) is provided with a filter element carrier cylinder (210) and a filter element (220). The filter element (220) is filled inside the filter element carrier cylinder (210). The exhaust gas to be treated passes through the filter element (220) and the filter element carrier cylinder (210) and then enters the heat exchange chamber (120). The heat exchange mechanism includes a first partition (310), a second partition (320), and a heat dissipation fin (330) connected between the first partition (310) and the second partition (320). The first partition (310), the second partition (320), and the heat dissipation fin (330) are disposed inside the heat exchange chamber (120). The waste gas to be treated passes through the heat dissipation fin (330) from one side of the first partition (310) to one side of the second partition (320). The filter element carrier cylinder (210) is equipped with a heat dissipation coil (350), which is connected to the shell side of the heat exchange mechanism. The fluid that exchanges heat with the waste gas to be treated reaches the heat dissipation coil (350) after heat exchange in the heat exchange mechanism and leaves the filter chamber (110) after cooling the filter element carrier cylinder (210).

2. The waste gas heat recovery and utilization system as described in claim 1, characterized in that, The first partition (310) and the second partition (320) divide the heat exchange chamber (120) into a first region, a second region and a third region. The first region and the third region are connected by a heat dissipation fin (330). The heat dissipation fin (330) traverses the second region. The fluid that exchanges heat with the waste gas to be treated enters the second region and exchanges heat with the waste gas to be treated located in the heat dissipation fin (330).

3. The waste gas heat recovery and utilization system as described in claim 2, characterized in that, The heat dissipation coil (350) is connected to the heat exchange mechanism by a connecting pipe (340). The outer wall of the filter chamber (110) is provided with a circulating fluid outlet (302). The outer wall of the heat exchange chamber (120) has a circulating fluid inlet (301). The circulating fluid inlet (301) enters the heat exchange mechanism tube and then reaches the heat dissipation coil (350) through the connecting pipe (340). The end of the heat dissipation coil (350) is connected to the circulating fluid outlet (302).

4. The waste gas heat recovery and utilization system as described in claim 3, characterized in that, The heat dissipation coil (350) includes several sets of straight tubes (352) and bent tubes (351) connected between the straight tubes (352). The straight tubes (352) are arranged in a ring array in the receiving cavity (201) provided inside the filter element carrier cylinder (210).

5. The waste gas heat recovery and utilization system as described in claim 4, characterized in that, The filter element carrier cylinder (210) includes a carrier plate (211) and an outer ring (212), and the filter element (220) is assembled in the cylindrical cavity formed by the carrier plate (211) and the outer ring (212).

6. The waste gas heat recovery and utilization system as described in claim 5, characterized in that, The support plate (211) is provided with vent holes for accommodating exhaust gas.

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