CN212778751U

CN212778751U - Energy recovery device

Info

Publication number: CN212778751U
Application number: CN202020947004.1U
Authority: CN
Inventors: 常季
Original assignee: Truking Watertown Pharmaceutical Equipment Co Ltd
Current assignee: Truking Watertown Pharmaceutical Equipment Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-03-23
Anticipated expiration: 2030-05-29

Abstract

The utility model relates to an energy recovery device, energy recovery device include waste heat collecting tank, first heat exchanger and second heat exchanger, and the waste gas of waste heat collecting tank flows to first shell side export from the first shell side entry of first heat exchanger, and the raw water flows to first tube side export from first tube side entry, and the raw water absorbs the heat of waste gas, and the raw water temperature realizes rising for the first time. Waste liquid of the waste heat collecting tank flows to a second shell pass outlet from a second shell pass inlet of the second heat exchanger, raw water flows to a second tube pass outlet from a first tube pass outlet through a second tube pass inlet, the raw water absorbs heat of the waste liquid, and the temperature of the raw water is raised for the second time. And finally, the raw water flows to the heat consumption equipment through the raw water outlet for use by the heat consumption equipment. Therefore, heat generated by the heat generating equipment is absorbed by raw water and then used by heat consumption equipment, the energy utilization rate is improved, the energy conservation and emission reduction of enterprises are effectively ensured, the production cost of pharmaceutical enterprises is reduced, and the production benefit is improved.

Description

Energy recovery device

Technical Field

The utility model relates to a heat recovery technical field especially relates to an energy recovery device.

Background

At present, pharmaceutical enterprises generally face the problem of gradual rise of energy price, and pressure is brought to the operation of the enterprises. During production and operation of equipment of the medicine enterprise, a large amount of waste heat is generated, such as residual heat of a distribution system, waste gas and waste heat of a sterilization cabinet, industrial steam condensate, chemical reaction waste heat and the like. A large amount of equipment is not rationally designed, and the heat of the equipment can not be reasonably utilized, so that the heat energy is seriously wasted, the production energy consumption of enterprises is high, the energy utilization rate is low, the energy waste is large, and the production cost is high.

SUMMERY OF THE UTILITY MODEL

Therefore, the energy recovery device is needed to be provided aiming at the technical problems, so that the energy utilization rate is improved, the energy conservation and emission reduction of enterprises are effectively ensured, the production cost of pharmaceutical enterprises is reduced, and the production benefit is improved.

An energy recovery device comprising:

the waste heat collecting tank is communicated with the heat generating equipment and used for storing waste gas and waste liquid generated by the heat generating equipment;

the first heat exchanger comprises a first shell-side inlet and a first shell-side outlet which are communicated, the first shell-side inlet is communicated with the top of the waste heat collecting tank, and the exhaust gas flows from the first shell-side inlet to the first shell-side outlet; the first heat exchanger further comprises a first tube pass inlet and a first tube pass outlet which are communicated, wherein the first tube pass inlet is used for introducing raw water, and the raw water flows from the first tube pass inlet to the first tube pass outlet;

the second heat exchanger comprises a second shell-side inlet and a second shell-side outlet which are communicated, the second shell-side inlet is communicated with the bottom of the waste heat collecting tank, and the waste liquid in the waste heat collecting tank flows from the second shell-side inlet to the second shell-side outlet; the second heat exchanger further comprises a second tube pass inlet and a second tube pass outlet which are communicated, the second tube pass inlet is communicated with the first tube pass outlet, the second tube pass outlet is communicated with a raw water outlet, raw water flows to the raw water outlet through the first heat exchanger and the second heat exchanger, and the raw water outlet is used for being externally connected with heat consumption equipment.

The technical solution is further explained below:

in one embodiment, the energy recovery device comprises a raw water output pipeline, and the second tube side outlet is communicated with the raw water outlet through the raw water output pipeline.

In one embodiment, the energy recovery device further includes a first pipeline and a first branch pipeline, the first tube side outlet is communicated with the second tube side inlet through the first pipeline, the start end of the first branch pipeline is communicated with the first pipeline, the tail end of the first branch pipeline is communicated with the raw water output pipeline, and the first branch pipeline is provided with a PID adjusting valve.

In one embodiment, the energy recovery device comprises a second branch pipeline, the starting end of the second branch pipeline is communicated with the raw water output pipeline, and the tail end of the second branch pipeline is provided with a raw water discharge port.

In one embodiment, the energy recovery device further comprises a second pipeline, the bottom of the waste heat collecting tank is communicated with the second shell side inlet through the second pipeline, and a centrifugal pump is arranged on the second pipeline.

In one embodiment, the energy recovery device further comprises a third pipeline, the starting end of the third pipeline is communicated with the second shell side outlet, and a waste liquid discharge port is arranged at the tail end of the third pipeline.

In one embodiment, the energy recovery device further comprises a third branch pipeline, the beginning end of the third branch pipeline is communicated with the third pipeline, and the tail end of the third branch pipeline is communicated with the top of the waste heat collecting tank.

In one embodiment, a first valve is disposed on the third pipeline, the first valve is disposed between the beginning of the third branch pipeline and the waste liquid discharge port, and a second valve is disposed on the third branch pipeline.

In one embodiment, the waste heat collection tank is a double-layer heat preservation tank, and an emptying valve is arranged at the bottom of the waste heat collection tank.

In one embodiment, the first heat exchanger is further provided with a third shell-side outlet, and the third shell-side outlet is communicated with the first shell-side inlet and is used for discharging condensed water formed by condensation of the exhaust gas.

The energy recovery device at least has the following beneficial effects:

the energy recovery device that this embodiment provided includes waste heat collection tank, first heat exchanger and second heat exchanger. Waste gas of the waste heat collecting tank flows to a first shell pass outlet from a first shell pass inlet of the first heat exchanger, raw water flows to a first tube pass outlet from a first tube pass inlet, the raw water absorbs heat of the waste gas, the temperature of the raw water is increased for the first time, the temperature of the waste gas is reduced or even condensed, and the waste gas can be discharged from the first shell pass outlet. The waste liquid of waste heat collection tank flows to the export of second shell side from the second shell side entry of second heat exchanger, and the raw water flows to the export of second shell side from first tube side export through the second tube side entry, and the raw water has absorbed the heat of waste liquid at this in-process, and the raw water temperature realizes that the second time risees, and the temperature of waste liquid descends simultaneously, and the waste liquid can be followed the export of second shell side and flowed. After the temperature of the raw water is raised twice, the raw water flows to the heat consumption equipment through the raw water outlet to be used by the heat consumption equipment. Therefore, heat generated by the heat generating equipment is absorbed by raw water and then used by heat consumption equipment, the energy utilization rate is improved, the energy conservation and emission reduction of enterprises are effectively ensured, the production cost of pharmaceutical enterprises is reduced, and the production benefit is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an energy recovery device according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the first heat exchanger shown at P in FIG. 1;

fig. 3 is an enlarged schematic view of the structure of the second heat exchanger at M in fig. 1.

Description of reference numerals: 100. an energy recovery device; 110. a waste heat collection tank; 111. a top portion; 112. a bottom; 120. a first heat exchanger; 121. a first shell side inlet; 122. a first shell side outlet; 123. a third shell side outlet; 124. a first tube side inlet; 125. a first tube side outlet; 130. a second heat exchanger; 131. a second shell side inlet; 132. a second shell side outlet; 133. a second tube side inlet; 134. a second tube side outlet; 140. a raw water output pipeline; 141. a second branch conduit; 150. a first conduit; 160. a first branch conduit; 161. a PID regulating valve; 170. a second conduit; 171. a centrifugal pump; 180. a third pipeline; 181. a first valve; 190. a third branch conduit; 191. a second valve; A. an exhaust gas outlet; B. a raw water inlet; C. a condensed water discharge port; E. a waste liquid discharge port; F. a raw water outlet; G. a raw water discharge port; 200. a heat-producing device.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

The embodiment provides an energy recovery device 100, which has the advantages of improving the energy utilization rate, effectively ensuring energy conservation and emission reduction of enterprises, reducing the production cost of pharmaceutical enterprises, and improving the production efficiency, and will be described in detail with reference to the accompanying drawings.

In one embodiment, referring to fig. 1 to 3, the energy recovery device 100 includes a waste heat collecting tank 110, a first heat exchanger 120, and a second heat exchanger 130, wherein the waste heat collecting tank 110 is configured to be communicated with a heat generating apparatus 200, and store waste gas and waste liquid generated by the heat generating apparatus 200. The first heat exchanger 120 includes a first shell-side inlet 121 and a first shell-side outlet 122 in communication. The first shell-side inlet 121 is communicated with the top 111 of the waste heat collecting tank 110. The exhaust gas flows from the first shell-side inlet 121 to the first shell-side outlet 122. The first heat exchanger 120 also includes a first tube-side inlet 124 and a first tube-side outlet 125 in communication. The first tube side inlet 124 is used for introducing raw water. The raw water flows from the first tube-side inlet 124 to the first tube-side outlet 125. The second heat exchanger 130 includes a second shell-side inlet 131 and a second shell-side outlet 132 in communication. The second shell-side inlet 131 is communicated with the bottom 112 of the waste heat collecting tank 110. The waste fluid in the waste heat collection tank 110 flows from the second shell-side inlet 131 to the second shell-side outlet 132. The second heat exchanger 130 also includes a second tube-side inlet 133 and a second tube-side outlet 134 in communication. The second tube-side inlet 133 is in communication with the first tube-side outlet 125. The second tube side outlet 134 is connected to the raw water outlet F. The raw water flows through the first heat exchanger 120 and the second heat exchanger 130 to the raw water outlet F for connecting an external heat consumption device (not shown). Specifically, raw water refers to water required for the production process. The heat consumption equipment refers to equipment which needs heat energy possessed by raw water. The tube side of the heat exchanger refers to the passage of the medium through the heat exchanger tubes and the portions thereof that communicate with each other. Shell side refers to the portion of the media that passes through and through the channels outside the heat exchanger tubes.

Further, referring to fig. 1 to fig. 3, the first heat exchanger 120 is further provided with a third shell-side outlet 123, and the third shell-side outlet 123 is communicated with the first shell-side inlet 121 for discharging condensed water formed by condensing the exhaust gas. The third shell-side outlet 123 is externally connected with a condensed water discharge port C, the first shell-side outlet 122 is externally connected with a waste gas discharge port A, and the first tube-side inlet 124 is externally connected with a raw water inlet B. As the exhaust gas enters the first heat exchanger 120 from the first shell-side inlet 121, the heat of the exhaust gas is absorbed by the raw water, a part of the exhaust gas is condensed into condensed water, and the condensed water is discharged from the condensed water discharge port C of the third shell-side outlet 123; a portion of the exhaust gas, still in gaseous form, is discharged from the exhaust gas outlet a of the first shell-side outlet 122.

The energy recovery device 100 provided by the present embodiment includes a waste heat collecting tank 110, a first heat exchanger 120, and a second heat exchanger 130. The exhaust gas of the waste heat collecting tank 110 flows from the first shell-side inlet 121 to the first shell-side outlet 122 of the first heat exchanger 120, the raw water flows from the first tube-side inlet 124 to the first tube-side outlet 125, the raw water absorbs the heat of the exhaust gas, the temperature of the raw water is increased for the first time, the temperature of the exhaust gas is reduced or even condensed, and the exhaust gas can be discharged from the first shell-side outlet 122. The waste liquid of the waste heat collecting tank 110 flows from the second shell-side inlet 131 to the second shell-side outlet 132 of the second heat exchanger 130, the raw water flows from the first tube-side outlet 125 to the second tube-side outlet 134 through the second tube-side inlet 133, the raw water absorbs heat of the waste liquid in the process, the temperature of the raw water is increased for the second time, meanwhile, the temperature of the waste liquid is reduced, and the waste liquid can flow out from the second shell-side outlet 132. After the temperature of the raw water is raised twice, the raw water flows to the heat consumption equipment through the raw water outlet F to be used by the heat consumption equipment. Therefore, heat generated by the heat generating equipment 200 is absorbed by raw water and then used by heat consumption equipment, so that the energy utilization rate is improved, the energy conservation and emission reduction of enterprises are effectively ensured, the production cost of pharmaceutical enterprises is reduced, and the production benefit is improved.

In one embodiment, referring to fig. 1 to 3, the energy recovery device 100 includes a raw water output pipeline 140, and the second tube-side outlet 134 is connected to the raw water outlet F through the raw water output pipeline 140. Specifically, the raw water passes through the first heat exchanger 120 and the second heat exchanger 130, flows from the second tube-pass outlet 134 of the second heat exchanger 130 to the raw water output pipeline 140, and finally enters the heat consumption device from the raw water outlet F for utilization.

Further, referring to fig. 1 to 3, the energy recovery device 100 further includes a first pipe 150 and a first branch pipe 160. The first tube-side outlet 125 is in communication with the second tube-side inlet 133 via the first conduit 150. The first branch pipe 160 has a start end connected to the first pipe 150, and a tail end connected to the raw water discharge pipe 140. Specifically, the raw water has two flow paths: the first path is that raw water is injected from the first tube pass inlet 124 and then is conveyed to the raw water outlet F through the first pipeline 150, the second heat exchanger 130 and the raw water output pipeline 140 in sequence; the second path is that the raw water passes through the first heat exchanger 120, the first pipeline 150, and the first branch pipeline 160 in sequence, then is collected into the raw water output pipeline 140, and finally is transported to the raw water outlet F. Wherein, a PID adjusting valve 161 is arranged on the first branch pipe 160. The opening degree of the PID control valve 161 is controlled according to the raw water temperature required by the heat consumption equipment, the flow rate of the raw water flowing through the second heat exchanger 130 is changed after the raw water passes through the PID control valve 161, the raw water flowing through the PID control valve 161 and the raw water flowing out of the second heat exchanger 130 are merged, the temperature of the merged raw water is reduced relative to the temperature of the raw water flowing out of the second tube-pass outlet 134, and the temperature of the raw water reaching the raw water outlet F is changed. When the raw water temperature required by the heat consumption equipment is low, the opening degree of the PID adjusting valve 161 may be adjusted to be large. When the raw water temperature required by the heat consumption equipment is high, the opening degree of the PID adjusting valve 161 may be adjusted to be small.

Further, referring to fig. 1-3, the PID control valve 161 refers to a combination of PID and control valve. The pid (performance integration differentiation) is a control algorithm in a controller (such as a PLC controller or a DCS controller) connected to the regulating valve through a cable. The regulating valve is also called a control valve, and in the field of industrial automation process control, the final control element for changing the process parameters of medium flow, pressure, temperature, liquid level and the like by power operation through receiving the control signal output by a regulating control unit. Generally consisting of an actuator and a valve. The regulating valve can be electrically, pneumatically, hydraulically or the like.

In one embodiment, referring to fig. 1 to 3, the energy recovery device 100 includes a second branch pipe 141. The starting end of the second branch pipe 141 is communicated with the raw water output pipe 140, and the tail end of the second branch pipe 141 is provided with a raw water discharge port G. Specifically, the raw water outlet F is closed, so that the unqualified raw water or the flushing discharge water for the flushing device may be discharged from the raw water discharge port G through the second branch pipe 141 and the raw water output pipe 140 in sequence.

In one embodiment, referring to fig. 1 to 3, the energy recovery device 100 further includes a second pipe 170. The bottom 112 of the waste heat collecting tank 110 is communicated with the second shell-side inlet 131 through the second pipeline 170, and a centrifugal pump 171 is arranged on the second pipeline 170. The second pipe 170 may directly convey the waste liquid in the waste heat collecting tank 110 to the second heat exchanger 130, and specifically, the centrifugal pump 171(centrifugal pump) refers to a pump that conveys the liquid by centrifugal force generated when the impeller rotates. The centrifugal pump 171 is used for conveying the waste liquid in the waste heat collecting tank 110 into the second heat exchanger 130 to cool down and heat the raw water.

In one embodiment, referring to fig. 1 to 3, the energy recovery device 100 further includes a third pipe 180, a beginning end of the third pipe 180 is connected to the second shell-side outlet 132, and a tail end of the third pipe 180 is provided with a waste liquid discharge port E. Further, the energy recovery device 100 further includes a third branch pipe 190, a start end of the third branch pipe 190 is communicated with the third pipe 180, and a tail end of the third branch pipe 190 is communicated with the top 111 of the waste heat collecting tank 110. Specifically, the waste liquid flow path in the waste heat collecting tank 110 has two paths: the first path is that the waste liquid passes through the second pipeline 170, the second shell-side inlet 131, the second shell-side outlet 132 and the third pipeline 180 in sequence from the bottom 112 of the waste heat collecting tank 110 to reach the waste liquid discharge port E; the second path is that the waste liquid passes through the second pipe 170, the second shell-side inlet 131, the second shell-side outlet 132, the third pipe 180, the third branch pipe 190 from the bottom 112 of the waste heat collecting tank 110 in sequence, and returns to the waste heat collecting tank 110.

Further, referring to fig. 1 to 3, a first valve 181 is disposed on the third pipeline 180, the first valve 181 is disposed between the beginning of the third branch pipeline 190 and the waste liquid discharge port E, and a second valve 191 is disposed on the third branch pipeline 190. Specifically, the first valve 181 and the second valve 191 are pneumatic ball valves. The first valve 181 and the second valve 191 are electrically connected to a liquid level sensor (not shown) of the waste heat collecting tank 110. When the liquid level in the waste heat collecting tank 110 drops to a low liquid level (the low liquid level is determined according to different tank bodies, and is not specifically limited herein), the liquid level sensor feeds back the liquid level information to a control module (not shown) of the energy recovery device 100, the control module controls the second valve 191 to be opened, and then a part of waste liquid can be injected into the waste heat collecting tank 110 through a second path of the waste liquid to realize cyclic utilization, so that the liquid level in the waste heat collecting tank 110 is maintained stable, and the problem of cavitation of a pump idling person caused by low liquid level alarm of the waste heat collecting tank 110 due to unstable flow of waste heat fluid in the tank is avoided. When the waste liquid in the waste heat collecting tank 110 is sufficient, the second valve 191 is closed, the first valve 181 is in an open state, and all the waste liquid is discharged from the waste liquid discharge port E through the first path of the waste liquid.

In one embodiment, referring to fig. 1 to 3, the waste heat collecting tank 110 is a double-layer heat-preserving tank, and an emptying valve (not shown) is disposed at a bottom 112 of the waste heat collecting tank 110. The arrangement of the emptying valve ensures that after the energy recovery device 100 is shut down, residual liquid in the waste heat collecting tank 110 is effectively discharged, no dead water exists, and the corrosion of the waste heat collecting tank 110 is avoided. The waste heat collecting tank 110 is a double-layer heat-insulating tank, a reserved joint is arranged on the tank, and a discharge port is arranged at the bottom 112. The waste heat collecting tank 110 is a double-layer heat-insulating tank, which can effectively prevent the heat loss of waste gas and waste liquid and avoid the rise of indoor temperature caused by heat exchange. The top 111 of the waste heat collecting tank 110 reserves a plurality of waste gas and waste liquid inlets, so that the waste heat of a plurality of heat generating devices 200 can be conveniently collected and processed. The tank top is provided with a rupture disk and a respirator, so that the phenomenon that the work personnel casualties and property loss are caused due to overlarge pressure or unstable external pressure in the tank is prevented. It is understood that the energy recovery device 100 provided in the present embodiment may further include other heat exchangers besides the first heat exchanger 120 and the second heat exchanger 130, and is not limited in particular. In addition, according to the working condition of the medium in the waste heat collecting tank 110, the heat exchanger may be a plate heat exchanger or a shell-and-tube heat exchanger, and the specific form of the heat exchanger is determined according to the specific working condition and is not specifically limited herein. A thermometer or a pressure gauge is installed on each of the pipes of the energy recovery device 100, such as the second pipe 170 and the first branch pipe 160, and will not be described herein.

The waste gas and waste liquid discharged by the energy recovery device 100 are subjected to cooling treatment by the heat exchanger, so that the low-temperature discharge of the heat-generating equipment 200 is realized, and the national low-temperature discharge requirement is met. Meanwhile, the heat energy of the waste gas and the waste liquid is recycled, and the purposes of energy conservation and emission reduction are achieved. In addition, the energy recovery device 100 provided in this embodiment has reproducibility, and can be used independently as a module, or a plurality of energy recovery devices 100 can be connected and combined for use, that is, the energy recovery device 100 has an integration characteristic.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. An energy recovery device, comprising:

2. The energy recovery device according to claim 1, wherein the energy recovery device comprises a raw water outlet, and the second tube side outlet is communicated with the raw water outlet through the raw water outlet.

3. The energy recovery device according to claim 2, further comprising a first pipeline and a first branch pipeline, wherein the first tube side outlet is communicated with the second tube side inlet through the first pipeline, a start end of the first branch pipeline is communicated with the first pipeline, a tail end of the first branch pipeline is communicated with the raw water output pipeline, and the first branch pipeline is provided with a PID adjusting valve.

4. The energy recovery device according to claim 2, wherein the energy recovery device comprises a second branch pipe, a starting end of the second branch pipe is communicated with the raw water output pipe, and a tail end of the second branch pipe is provided with a raw water discharge port.

5. The energy recovery device according to claim 1, further comprising a second pipeline, wherein the bottom of the waste heat collecting tank is communicated with the second shell side inlet through the second pipeline, and a centrifugal pump is arranged on the second pipeline.

6. The energy recovery device according to claim 1, further comprising a third pipeline, wherein the beginning end of the third pipeline is communicated with the second shell side outlet, and the end of the third pipeline is provided with a waste liquid discharge port.

7. The energy recovery device according to claim 6, further comprising a third branch pipeline, wherein the beginning of the third branch pipeline is communicated with the third pipeline, and the end of the third branch pipeline is communicated with the top of the waste heat collecting tank.

8. The energy recovery device according to claim 7, wherein a first valve is provided in the third branch pipe between a start end of the third branch pipe and the waste liquid discharge port, and a second valve is provided in the third branch pipe.

9. The energy recovery device according to claim 1, wherein the waste heat collecting tank is a double-layer heat-insulating tank, and an emptying valve is arranged at the bottom of the waste heat collecting tank.

10. The energy recovery device according to any one of claims 1 to 9, wherein a third shell-side outlet is further provided on the first heat exchanger, and the third shell-side outlet is communicated with the first shell-side inlet for discharging condensed water formed by condensation of the exhaust gas.