Engine tail gas heat recovery system and engineering equipment

Abstract

The utility model provides an engine tail gas heat recovery system and engineering equipment, the heat recovery system comprises a tail gas recovery device arranged at the rear end of an engine post-processing device and a heat energy storage device, the tail gas recovery device comprises a net type heating liquid box, a heat preservation layer wrapping the net type heating liquid box, and an exhaust hood; the end, away from the exhaust hood, of the net-shaped heating liquid tank is used for being connected with the rear end of an engine aftertreatment device so that liquid in the net-shaped heating liquid tank can be heated through tail gas heat, and a first water inlet and a first water outlet are formed in the net-shaped heating liquid tank; the heat energy storage device comprises a liquid storage tank, a second water inlet and a second water outlet are formed in the liquid storage tank, the second water inlet is connected with the first water outlet through a first water pipe, and the second water outlet is connected with the first water inlet through a second water pipe; the heat generated by the tail gas of the engine can be recovered and stored for use, so that the energy loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to an engine exhaust heat recovery system and engineering equipment. Background Art

[0002] For example, in mining operations such as crushing and rock excavation, machines often need to operate in extremely cold conditions. Currently, the use of machines in these special operating conditions is limited by climatic factors. Winter often requires full preheating of components due to low temperatures. In environments without insulation, how to quickly achieve low-temperature preheating of engineering equipment has become a key concern. However, existing preheating methods have the following problems:

[0003] 1. During the long operation of engineering equipment (excavators), the heat of high-temperature exhaust gas emitted by the power system is not effectively recovered. At the same time, the engineering equipment (excavators) have never effectively utilized and stored the energy continuously emitted, resulting in huge energy losses;

[0004] 2. During the operation of engineering equipment (excavator), the engine power source and other transmission components need to be under low temperature conditions before starting the machine. Generally, they are fully preheated for a long time with the help of an external heat source to ensure that the main systems of the engineering equipment (excavator) can be used normally.

[0005] Therefore, there is an urgent need for an engine exhaust heat recovery system and engineering equipment that can recover and store the heat generated by the engine exhaust to reduce energy loss. Utility Model Content

[0006] The purpose of the utility model is to provide an engine exhaust heat recovery system and engineering equipment, aiming to solve the technical problem that traditional engineering equipment fails to recycle the heat generated by the engine exhaust and has a large energy loss.

[0007] To achieve the above objectives, in a first aspect, the present invention provides an engine exhaust heat recovery system, comprising an exhaust recovery device disposed at the rear end of an engine after-treatment device, and a heat energy storage device connected to the exhaust recovery device.

[0008] The exhaust gas recovery device includes a mesh-type heating liquid tank, an insulation layer wrapped around the outside of the mesh-type heating liquid tank, and an exhaust hood provided at an end of the mesh-type heating liquid tank away from the engine exhaust connection end; the end of the mesh-type heating liquid tank away from the exhaust hood is used to connect to the rear end of the engine after-treatment device to heat the liquid in the mesh-type heating liquid tank by the heat of the exhaust gas, and the mesh-type heating liquid tank is provided with a first water inlet and a first water outlet;

[0009] The heat energy storage device includes a liquid storage tank, which is provided with a second water inlet and a second water outlet. The second water inlet is connected to the first water outlet through a first water pipe, and the second water outlet is connected to the first water inlet through a second water pipe.

[0010] As a further improvement of the above solution, the exhaust gas recovery device is connected to the rear end of the engine after-treatment device through an exhaust port connecting device.

[0011] As a further improvement of the above scheme, the exhaust port connecting device includes a flange pipe and an exhaust gas heat collection cavity, one end of the flange pipe is connected to the exhaust gas heat collection cavity, and the other end is connected to the rear end of the engine after-treatment device, the exhaust gas heat collection cavity has an opening, and the opening is connected to the air inlet end of the mesh-type heating liquid tank through a clamp.

[0012] As a further improvement of the above scheme, the exhaust gas recovery device also includes a storage water pump assembly and an external water outlet arranged on the liquid storage tank. The storage water pump assembly is used to provide pumping power for the energy storage liquid in the liquid storage tank, and the external water outlet is used to connect an external preheating pipeline.

[0013] As a further improvement of the above solution, a temperature sensor is provided in the mesh-type heating liquid tank for monitoring the temperature of the liquid in the mesh-type heating liquid tank.

[0014] In a second aspect, the present invention further provides an engineering device, comprising the engine exhaust heat recovery system provided in the first aspect.

[0015] Since the utility model adopts the above technical solution, the beneficial effects of this application are:

[0016] The utility model provides an engine exhaust heat recovery system, which arranges an exhaust gas recovery device at the rear end of an engine after-treatment device, heats the liquid in a mesh-type heating liquid tank with the collected exhaust gas heat to recover the exhaust gas heat, and then stores and utilizes the recovered energy through a heat energy storage device; in addition, the engine exhaust heat recovery system provided by the utility model does not require changing the overall structure of the original engineering equipment, nor does it require adding mounting supports, and only requires fixing the liquid storage tank on a frame or other position of the original engineering equipment; the installation method is simple and the versatility is high, and it can be applied to engineering equipment of different types and specifications, thereby reducing the energy loss of the engineering equipment and achieving the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 This is a three-dimensional schematic diagram of an engine exhaust heat recovery system disclosed in the utility model installed on a certain engineering equipment;

[0019] Figure 2 It is a three-dimensional schematic diagram of the tail gas recovery device disclosed in the utility model.

[0020] Reference numerals:

[0021] 1. Exhaust gas recovery device; 11. Mesh-type heating liquid tank; 12. Insulation layer; 13. Exhaust hood; 14. First water inlet; 15. First water outlet; 16. Temperature sensor; 2. Heat energy storage device; 21. Liquid storage tank; 22. Second water inlet; 23. Second water outlet; 24. Energy storage water pump assembly; 25. External water outlet; 3. First water pipe; 4. Second water pipe; 5. Discharge port connection device; 51. Flange pipe; 52. Exhaust gas heat collection chamber; 6. Clamp; 7. Engine after-treatment device.

[0022] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications (such as up, down, etc.) in the implementation mode of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, in this utility model, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0026] Moreover, the technical solutions between the various embodiments of the present invention can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] Example 1

[0028] See also Figure 1-Figure 2 The utility model provides an engine exhaust heat recovery system, comprising an exhaust recovery device 1 arranged at the rear end of an engine post-processing device 7, and a heat energy storage device 2 connected to the exhaust recovery device 1.

[0029] The exhaust gas recovery device 1 includes a mesh-type heating liquid tank 11, an insulation layer 12 wrapped around the outside of the mesh-type heating liquid tank 11, and an exhaust hood 13 provided at an end of the mesh-type heating liquid tank 11 away from the engine exhaust connection end; the end of the mesh-type heating liquid tank 11 away from the exhaust hood 13 is used to connect to the rear end of the engine after-treatment device 7 to heat the liquid in the mesh-type heating liquid tank 11 by the heat of the exhaust gas, and the mesh-type heating liquid tank 11 is provided with a first water inlet 14 and a first water outlet 15;

[0030] The heat energy storage device 2 includes a liquid storage tank 21, and the liquid storage tank 21 is provided with a second water inlet 22 and a second water outlet 23. The second water inlet 22 is connected to the first water outlet 15 through a first water pipe 3, and the second water outlet 23 is connected to the first water inlet 14 through a second water pipe 4.

[0031] The present invention sets an exhaust gas recovery device 1 at the rear end of the engine after-treatment device 7, and heats the liquid in the mesh heating liquid tank 11 with the collected exhaust gas heat to recover the exhaust gas heat, and then stores and utilizes the recovered energy through the heat energy storage device 2; in addition, the engine exhaust gas heat recovery system provided by the present invention does not need to change the overall structure of the original engineering equipment, nor does it need to add mounting brackets. It only needs to fix the liquid storage tank 21 at the frame of the original engineering equipment, etc. The installation method is simple and has high versatility. It can be applied to engineering equipment of different types and specifications, reducing the energy loss of engineering equipment, thereby achieving the purpose of energy saving.

[0032] As a preferred embodiment, the exhaust gas recovery device 1 is connected to the rear end of the engine post-processing device 7 through an exhaust port connection device;

[0033] Specifically, the exhaust port connection device includes a flange pipe 51 and an exhaust gas heat collection cavity 52. ​​One end of the flange pipe 51 is connected to the exhaust gas heat collection cavity 52, and the other end is connected to the rear end of the engine after-treatment device 7. The exhaust gas heat collection cavity 52 has an opening, and the opening is connected to the air inlet end of the mesh-type heating liquid tank 11 through a clamp 6.

[0034] In this embodiment, the flange pipe 51 includes a pipe body and a connecting flange arranged at one end of the pipe body, the other end of the pipe body is connected to the exhaust gas heat collection cavity 52, and the connecting flange is used to connect to the rear end of the engine after-treatment device 7 to collect exhaust gas; the exhaust gas heat collection cavity 52 is a sphere with a hollow inner cavity; in some preferred embodiments, the discharge port connecting device is also wrapped with an insulation layer 12 to reduce heat loss; the exhaust gas is transported to the mesh-type heating liquid tank 11 through the discharge port connecting device, which is convenient for arrangement on engineering equipment.

[0035] As a preferred embodiment, a temperature sensor 16 is provided in the mesh-type heating liquid tank 11 for monitoring the temperature of the liquid in the mesh-type heating liquid tank 11; preferably, electromagnetic switch valves are respectively provided on the first water pipe 3 and the second water pipe 4. When the temperature sensor 16 detects that the liquid in the mesh-type heating liquid tank 11 reaches a preset temperature, the corresponding electromagnetic switch valve on the first water pipe 3 is opened, and the liquid reaching the preset temperature enters the liquid storage tank 21 through the first water pipe 3 for storage for subsequent use.

[0036] As a preferred embodiment, the exhaust gas recovery device 1 further includes an energy storage water pump assembly 24 and an external water outlet 25 provided on the liquid storage tank 21. The energy storage water pump assembly 24 is used to provide pumping power for the energy storage liquid in the liquid storage tank 21. The external water outlet 25 is used to be externally connected to a preheating pipeline. The external water outlet 25 is not limited to being connected only to the preheating pipeline, but can also serve as a replenishment interface for the liquid in the liquid storage tank 21.

[0037] The setting of the energy storage water pump assembly 24 can, on the one hand, circulate the liquid therein through the first water pipe 3 and the second water pipe 4 with the liquid in the mesh-type heating liquid tank to absorb the heat of the exhaust gas, thereby achieving the purpose of exhaust gas heat recovery and storage; on the other hand, it is also convenient to transport the liquid with heat collected in the storage liquid to the components of the engineering equipment that need to be preheated, thereby reducing the setting of external heating heat sources.

[0038] Example 2

[0039] The present utility model also provides an engineering equipment, including an engine exhaust heat recovery system as described in Example 1; in this embodiment, taking an excavator as an example, the exhaust recovery device 1 of the engine exhaust heat recovery system is arranged at the rear end of the engine after-treatment device 7 of the excavator's power assembly, and the heat energy storage device 2 of the engine exhaust heat recovery system is arranged on the front side of the right platform of the excavator's rotary platform, and the first water pipe 3 and the second water pipe 4 are connected to the side of the rotary platform and the hydraulic oil tank and the fuel tank, so that the heat generated by the excavator engine exhaust can be recovered and stored through different energy conversion methods, thereby reducing energy damage; and the installation of the entire engine exhaust heat recovery system does not require changing the original overall structure of the excavator, and does not require additional rotating supports, and its installation method is simple and highly versatile, and can be installed and applied to excavators of different specifications and models.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, within the scope of the present invention are included in the patent protection scope of the present invention.

Claims

1. An engine exhaust heat recovery system, characterized in that: It includes an exhaust gas recovery device arranged at the rear end of the engine after-treatment device and a heat energy storage device connected to the exhaust gas recovery device. The exhaust gas recovery device includes a mesh-type heating liquid tank, an insulation layer wrapped around the outside of the mesh-type heating liquid tank, and an exhaust hood provided at an end of the mesh-type heating liquid tank away from the engine exhaust connection end; the end of the mesh-type heating liquid tank away from the exhaust hood is used to connect to the rear end of the engine after-treatment device to heat the liquid in the mesh-type heating liquid tank by the heat of the exhaust gas, and the mesh-type heating liquid tank is provided with a first water inlet and a first water outlet; The heat energy storage device includes a liquid storage tank, which is provided with a second water inlet and a second water outlet. The second water inlet is connected to the first water outlet through a first water pipe, and the second water outlet is connected to the first water inlet through a second water pipe.

2. The engine exhaust heat recovery system according to claim 1, characterized in that: The exhaust gas recovery device is connected to the rear end of the engine post-processing device through an exhaust port connecting device.

3. The engine exhaust heat recovery system according to claim 2, characterized in that: The exhaust port connection device includes a flange pipe and an exhaust gas heat collection cavity. One end of the flange pipe is connected to the exhaust gas heat collection cavity, and the other end is connected to the rear end of the engine after-treatment device. The exhaust gas heat collection cavity has an opening, and the opening is connected to the air inlet end of the mesh-type heating liquid tank through a clamp.

4. An engine exhaust heat recovery system according to any one of claims 1 to 3, characterized in that: The exhaust gas recovery device also includes an energy storage water pump assembly and an external water outlet arranged on the liquid storage tank. The energy storage water pump assembly is used to provide pumping power for the energy storage liquid in the liquid storage tank, and the external water outlet is used to be connected to an external preheating pipeline.

5. The engine exhaust heat recovery system according to any one of claims 1 to 3, characterized in that: A temperature sensor is provided in the mesh-type heating liquid tank for monitoring the temperature of the liquid in the mesh-type heating liquid tank.

6. An engineering equipment, characterized in that: The invention comprises an engine exhaust heat recovery system as described in any one of claims 1 to 5.

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