A waste heat recovery device for a molding machine

Abstract

The utility model discloses a kind of waste heat recovery and utilization devices for forming machine, including waste gas recovery pipeline, first shunt pipeline, primary heat exchanger and second shunt pipeline;First shunt pipeline intake end is connected with waste gas recovery pipeline by first three-way valve, and gas outlet end is communicated with the heating pipeline of drying room;Primary heat exchanger intake is connected with waste gas recovery pipeline by first three-way valve, and the liquid outlet of primary heat exchanger is communicated with forming machine by second three-way valve;Wherein, first three-way valve is used to control waste gas recovery pipeline and the gas intake of primary heat exchanger or first shunt pipeline conduction;Second shunt pipeline intake end is connected with the gas outlet of primary heat exchanger by third three-way valve, by the cooperation of first three-way valve, first shunt pipeline and primary heat exchanger, greatly improve the waste heat utilization rate and flexible production effect, so as to be able to flexibly select the utilization direction of waste heat according to actual production needs, simple structure, and convenient maintenance.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment technology for molding machines, specifically to a waste heat recovery and utilization device for exhaust gas from molding machines. Background Technology

[0002] With the continuous development of industrial production, especially in the fields of automated and intelligent manufacturing, waste gas treatment and waste heat recovery have become important means to improve energy efficiency and reduce energy consumption. Molding machines, as common industrial equipment, are widely used in industries such as ceramics, metallurgy, and plastics. During the operation of molding machines, a large amount of waste gas is usually generated, and this waste gas contains high-temperature steam. If this heat energy is not effectively recovered and utilized and is directly emitted into the atmosphere, it easily leads to energy waste.

[0003] Currently, although some waste heat recovery systems have been applied in different industrial fields, most of these devices have low recycling efficiency, complex structure, and high maintenance costs. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a waste heat recovery and utilization device for molding machine exhaust gas, so as to solve the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A waste heat recovery and utilization device for molding machine exhaust gas includes:

[0007] Waste gas recovery pipeline;

[0008] The first diversion pipe has its inlet end connected to the waste gas recovery pipe via a first three-way valve, and its outlet end connected to the heating pipe of the drying room.

[0009] The primary heat exchanger has its inlet connected to the waste gas recovery pipeline via a first three-way valve, and its outlet connected to the molding machine via a second three-way valve. The first three-way valve controls the connection between the waste gas recovery pipeline and the inlet of the primary heat exchanger or the first diversion pipeline, so as to transport the gas transported by the waste gas recovery pipeline to the primary heat exchanger or to the first diversion pipeline.

[0010] The second diversion pipe has its inlet end connected to the outlet of the first-stage heat exchanger via a third three-way valve, and its outlet end connected to the heating pipe of the drying room.

[0011] In one embodiment, a secondary heat exchanger is further included, the inlet of which is connected to the primary heat exchanger via the third three-way valve; wherein the third three-way valve is used to control the outlet of the primary heat exchanger to be connected to the second diversion pipe or the inlet of the secondary heat exchanger.

[0012] In one embodiment, a water storage tank is further included, the inlet of which is connected via a pipe to the outlet of the secondary heat exchanger and the second three-way valve respectively; wherein, the second three-way valve is used to control the connection between the outlet of the primary heat exchanger and the inlet of the molding machine or the water storage tank.

[0013] In one embodiment, the outlet of the water storage tank is connected to the heating network.

[0014] In one embodiment, a fourth three-way valve is also included, through which the outlet of the heating network is connected to the inlet or outlet of the primary heat exchanger.

[0015] In one embodiment, a cyclone separator is also included, which is connected to the exhaust port of the molding machine and the exhaust gas recovery pipe, respectively.

[0016] In one embodiment, an inlet pipe is also included, which is connected to the inlet of the first-stage heat exchanger via a first valve body.

[0017] In one embodiment, the secondary heat exchanger is connected to the heating pipe or gas filter of the drying chamber via a fifth three-way valve.

[0018] In one embodiment, the outlet of the heating pipe of the drying chamber is connected to the gas filter.

[0019] In one embodiment, it further includes:

[0020] The first thermometer is installed before the process of the first three-way valve;

[0021] The second thermometer is located between the liquid outlet of the first-stage heat exchanger and the second three-way valve.

[0022] The third thermometer is located between the outlet of the first-stage heat exchanger and the third three-way valve.

[0023] Compared with existing technologies, the beneficial effects of this utility model are as follows:

[0024] By switching the first three-way valve, the gas transported by the waste gas recovery pipeline is sent to the primary heat exchanger for heat exchange treatment, and the liquid after heat absorption and exchange is sent to the molding machine for recycling through the second three-way valve, thereby improving the waste heat utilization rate and reducing the enterprise's production costs. Alternatively, by switching the first three-way valve, the gas transported by the waste gas recovery pipeline is sent to the heating pipeline of the drying room, thereby converting it into the heat energy required for drying the products, thus improving the waste heat utilization rate and reducing the enterprise's production costs. Through the combined use of the first three-way valve, the first diversion pipeline and the primary heat exchanger, the waste heat utilization rate of the waste gas and the flexible production effect are greatly improved, so that the direction of waste heat utilization can be flexibly selected according to actual production needs. The structure is simple and easy to maintain. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a waste heat recovery and utilization device for molding machine provided in one embodiment of the present invention;

[0026] In the diagram: 1. Waste gas recovery pipeline, 2. First diversion pipeline, 3. First three-way valve, 4. Primary heat exchanger, 5. Second three-way valve, 6. Molding machine, 7. Second diversion pipeline, 8. Third three-way valve, 9. Drying room, 901. Heating pipeline, 10. Secondary heat exchanger, 11. Water storage tank, 12. Heating network, 13. Fourth three-way valve, 14. Cyclone separator, 15. Liquid inlet pipe, 16. Fifth three-way valve, 17. Gas filter. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figure 1 As shown, the present invention provides a waste heat recovery and utilization device for molding machine exhaust gas, comprising:

[0029] Waste gas recovery pipeline 1;

[0030] The first diversion pipe 2 has its inlet end connected to the waste gas recovery pipe 1 via the first three-way valve 3, and its outlet end connected to the heating pipe 901 of the drying room 9.

[0031] The inlet of the primary heat exchanger 4 is connected to the waste gas recovery pipeline 1 through the first three-way valve 3, and the outlet of the primary heat exchanger 4 is connected to the molding machine 6 through the second three-way valve 5. The first three-way valve 3 is used to control the connection between the waste gas recovery pipeline 1 and the inlet of the primary heat exchanger 4 or the first diversion pipeline, so as to transport the gas transported by the waste gas recovery pipeline 1 to the primary heat exchanger 4 or to the first diversion pipeline 2.

[0032] The second diversion pipe 7 has its inlet end connected to the outlet of the first-stage heat exchanger 4 via the third three-way valve 8, and its outlet end connected to the heating pipe 901 of the drying room 9.

[0033] In this embodiment, the first three-way valve 3 connects the waste gas recovery pipeline 1 to the first diversion pipeline 2 and the primary heat exchanger 4. During operation, by switching the first three-way valve 3, the gas transported by the waste gas recovery pipeline 1 is transported to the primary heat exchanger 4 for heat exchange treatment, and the liquid after heat absorption and exchange is transported to the molding machine 6 for recycling through the second three-way valve 5, thereby improving the waste heat utilization rate and reducing the enterprise's production costs. Alternatively, by switching the first three-way valve 3, the gas transported by the waste gas recovery pipeline 1 is transported to the heating pipeline 901 of the drying room 9, thereby converting it into the heat energy required for drying the products, thereby improving the waste heat utilization rate and reducing the enterprise's production costs. Through the combined use of the first three-way valve 3, the first diversion pipeline 2 and the primary heat exchanger 4, the waste heat utilization rate of the waste gas and the flexible production effect are greatly improved, so that the direction of waste heat utilization can be flexibly selected according to actual production needs. The structure is simple and easy to maintain.

[0034] It should be noted that by delivering the liquid after heat exchange in the primary heat exchanger 10 to the molding machine 6 through the second three-way valve 5, new heat energy can be continuously replenished to the heating system of the molding machine, reducing energy consumption and lowering operating costs. The heating system of the molding machine is used to preheat, heat, and / or maintain the molding temperature of the material.

[0035] like Figure 1 As shown, in one embodiment, a secondary heat exchanger 10 is also included. The air inlet of the secondary heat exchanger 10 is connected to the primary heat exchanger 4 through a third three-way valve 8. The third three-way valve 8 is used to control the air outlet of the primary heat exchanger 4 to be connected to the second diversion pipe 7 or the air inlet of the secondary heat exchanger 10.

[0036] In this embodiment, the first-stage heat exchanger 4 is connected to the second diversion pipe 7 and the air inlet of the second-stage heat exchanger 10 via the third three-way valve 8. During operation, by switching the third three-way valve 8, the gas that has undergone initial heat exchange in the first-stage heat exchanger 4 is transported to the second-stage heat exchanger 10 for further heat exchange, achieving multi-stage waste heat utilization and further improving waste heat utilization rate and reducing enterprise production costs. Alternatively, by switching the third three-way valve 8, the gas that has undergone initial heat exchange in the first-stage heat exchanger 4 is transported to the heating pipe 901 of the drying chamber 9, thereby converting it into the heat energy required for drying the products, thus improving waste heat utilization rate and reducing enterprise production costs. At the same time, the combined use of the first diversion pipe 2 and the second diversion pipe 7 can ensure that the drying chamber 9 is provided with different gradient drying temperatures to meet the drying temperature requirements of different products and enhance operational adaptability.

[0037] like Figure 1 As shown, in one embodiment, a water storage tank 11 is also included. The inlet of the water storage tank 11 is connected to the outlet of the secondary heat exchanger 10 and the second three-way valve 5 through pipes. The second three-way valve 5 is used to control the connection between the outlet of the primary heat exchanger 4 and the inlet of the molding machine 6 or the water storage tank 11.

[0038] In this embodiment, the outlet of the primary heat exchanger 4 is connected to the molding machine 6 and the water storage tank 11 via the second three-way valve 5. During operation, by switching the second three-way valve 5, the liquid discharged from the primary heat exchanger 4 after heat absorption and exchange is transported to the molding machine 6 for recycling, thereby improving the waste heat utilization rate and reducing the enterprise's production costs. Alternatively, by switching the second three-way valve 5, the liquid discharged from the primary heat exchanger 4 after heat absorption and exchange is transported to the water storage tank 11 for storage for subsequent use, thereby improving the waste heat utilization rate and reducing the enterprise's production costs.

[0039] like Figure 1 As shown, in one embodiment, the outlet of the water storage tank 11 is connected to the heating pipe network 12.

[0040] In this embodiment, by connecting the outlet of the water storage tank 11 to the heating pipe network 12, the effect of waste heat heating is achieved, thereby increasing the diversity of waste heat utilization and reducing enterprise production costs.

[0041] The outlet of the water storage tank 11 can be connected to the heating network 12 through a pipe, and a one-way valve is installed on the pipe to prevent liquid backflow and ensure the accuracy and controllability of liquid delivery.

[0042] like Figure 1 As shown, in one embodiment, a fourth three-way valve 13 is also included, through which the outlet of the heating network 12 is connected to the inlet or outlet of the primary heat exchanger 4.

[0043] In this embodiment, the outlet of the heating pipe network 12 is connected to the inlet and outlet of the primary heat exchanger 4 via the fourth three-way valve 13. During operation, by switching the fourth three-way valve 13, the liquid discharged from the heating pipe network 12 is transported to the primary heat exchanger 4 for recycling, thereby improving energy utilization and reducing enterprise production costs. Alternatively, by switching the fourth three-way valve 13, the liquid discharged from the heating pipe network 12 is transported to the outlet pipe to avoid liquid accumulation, which would occupy enterprise storage resources and reduce enterprise production costs.

[0044] like Figure 1 As shown, in one embodiment, a cyclone separator 14 is also included, which is connected to the exhaust port of the molding machine 6 and the exhaust gas recovery pipe 1, respectively.

[0045] In this embodiment, by installing a cyclone separator 14 between the exhaust port of the molding machine 6 and the exhaust gas recovery pipe 1, the exhaust gas can be effectively separated into gas-solid or gas-liquid, avoiding damage to subsequent process equipment, extending the service life of the equipment, and reducing production costs.

[0046] like Figure 1 As shown, in one embodiment, it also includes an inlet pipe 15, which is connected to the inlet of the first-stage heat exchanger 4 via a first valve body.

[0047] In this embodiment, the liquid inlet pipe 15 is connected to the liquid inlet of the first-stage heat exchanger 4 through the first valve body. The liquid inlet pipe 15 is connected to the external liquid supply system so that when the first-stage heat exchanger 4 is working, the heat exchange fluid medium can be continuously supplied to the first-stage heat exchanger 4 to exchange heat and cool down the exhaust gas discharged from the molding machine 6, so as to ensure the continuous and stable working effect of the first-stage heat exchanger 4.

[0048] It should be noted that the liquid inlet of the secondary heat exchanger 10 is also connected to a liquid inlet pipe and a valve body, and its liquid inlet pipe is also connected to an external liquid supply system so that when the secondary heat exchanger 10 is working, the heat exchange fluid medium can be continuously supplied to the secondary heat exchanger 10 to cool down the gas after the initial heat exchange in the primary heat exchanger, thereby ensuring the continuous and stable working effect of the secondary heat exchanger 10.

[0049] like Figure 1 As shown, in one embodiment, the secondary heat exchanger 10 is connected to the heating pipe 901 or the gas filter 17 of the drying chamber 9 via a fifth three-way valve 16.

[0050] In this embodiment, the outlet of the secondary heat exchanger 10 is connected to the heating pipe 901 and gas filter 17 of the drying chamber 9 via the fifth three-way valve 16. During operation, by switching the fifth three-way valve 16, the gas cooled by the secondary heat exchanger 10 is transported to the drying chamber 9 to dry the products, thereby achieving a tiered drying effect, meeting the drying temperature requirements of different products, improving waste heat utilization, and reducing enterprise production costs. Alternatively, by switching the fifth three-way valve 16, the gas cooled by the secondary heat exchanger 10 is transported to the gas filter 17 for filtration before being discharged, avoiding environmental pollution.

[0051] If necessary, the fifth three-way valve 16 can be connected to the heating pipe 901 of the drying chamber 9 through the third diversion pipe.

[0052] It should be noted that by using the first three-way valve 3, the third three-way valve 8, and the fifth three-way valve 16 in combination, gases of different temperatures can be delivered to the drying chamber 9 respectively, so as to provide a variety of drying temperature requirements for the drying chamber 9 according to actual needs, further improving the utilization of waste heat and meeting the diversified needs of production.

[0053] like Figure 1 As shown, in one embodiment, the outlet of the heating pipe 901 of the drying chamber 9 is connected to the gas filter 17.

[0054] In this embodiment, the exhaust port of the heating pipe 901 of the drying chamber 9 is connected to the gas filter 17 so that the gas discharged from the heating pipe 901 is filtered before being discharged, thereby avoiding environmental pollution and improving environmental protection.

[0055] Depending on the requirements, the gas filter 17 can be an activated carbon adsorber, plasma filter, water spray tower, and / or photocatalytic oxidation device. The appropriate option can be selected based on actual needs.

[0056] like Figure 1 As shown, in one embodiment, it further includes:

[0057] The first thermometer T1 is installed before the process of the first three-way valve 3;

[0058] The second thermometer T2 is located between the liquid outlet of the first-stage heat exchanger 4 and the second three-way valve 5.

[0059] The third thermometer T3 is located between the outlet of the first-stage heat exchanger 4 and the third three-way valve 8.

[0060] In this embodiment, a first thermometer T1, a second thermometer T2, and a third thermometer T3 are respectively installed in front of the first three-way valve 3, the second three-way valve 5, and the third three-way valve 8, so that the flow direction of each three-way valve (the first three-way valve 3, the second three-way valve 5, and the third three-way valve 8) can be switched according to the actual temperature as needed, thereby achieving intelligent control.

[0061] Similarly, as above, a fourth thermometer and a fifth thermometer (not shown) can be installed in front of the fourth three-way valve 13 and the fifth three-way valve 16 respectively, so as to switch the flow direction of each three-way valve (the fourth three-way valve 13 and the fifth three-way valve 16) according to the actual temperature as needed, so as to achieve intelligent control effect.

[0062] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A waste heat recovery and utilization device for molding machine exhaust gas, characterized in that, include: Waste gas recovery pipeline; The first diversion pipe has its inlet end connected to the waste gas recovery pipe via a first three-way valve, and its outlet end connected to the heating pipe of the drying room. The primary heat exchanger has its inlet connected to the waste gas recovery pipeline via a first three-way valve, and its outlet connected to the molding machine via a second three-way valve. The first three-way valve controls the connection between the waste gas recovery pipeline and the inlet of the primary heat exchanger or the first diversion pipeline, so as to transport the gas transported by the waste gas recovery pipeline to the primary heat exchanger or to the first diversion pipeline. The second diversion pipe has its inlet end connected to the outlet of the first-stage heat exchanger via a third three-way valve, and its outlet end connected to the heating pipe of the drying room.

2. The waste heat recovery device for a molding machine according to claim 1, wherein It also includes a secondary heat exchanger, the air inlet of which is connected to the primary heat exchanger via the third three-way valve; wherein the third three-way valve is used to control the air outlet of the primary heat exchanger to be connected to the second diversion pipe or the air inlet of the secondary heat exchanger.

3. The waste heat recovery device for a molding machine according to claim 2, wherein It also includes a water storage tank, the inlet of which is connected to the outlet of the secondary heat exchanger and the second three-way valve via pipes; wherein, the second three-way valve is used to control the connection between the outlet of the primary heat exchanger and the inlet of the molding machine or the water storage tank.

4. The waste heat recovery device for a molding machine according to claim 3, wherein The outlet of the water storage tank is connected to the heating pipe network.

5. The waste heat recovery device for a molding machine according to claim 4, wherein It also includes a fourth three-way valve, through which the outlet of the heating pipe network is connected to the inlet or outlet of the first-stage heat exchanger.

6. The waste heat recovery device for a molding machine according to claim 1, wherein It also includes a cyclone separator, which is connected to the exhaust gas outlet of the molding machine and the exhaust gas recovery pipeline, respectively.

7. The waste heat recovery and utilization device for molding machine exhaust gas as described in claim 1, characterized in that, It also includes a liquid inlet pipe, which is connected to the liquid inlet of the first-stage heat exchanger via a first valve body.

8. The waste heat recovery device for a molding machine according to claim 2, wherein The secondary heat exchanger is connected to the heating pipe or gas filter of the drying room via a fifth three-way valve.

9. The waste heat recovery and utilization device for molding machine exhaust gas as described in claim 8, characterized in that, The outlet of the heating pipe in the drying room is connected to the gas filter.

10. The waste heat recovery device for a molding machine according to claim 1, wherein Also includes: The first thermometer is installed before the process of the first three-way valve; The second thermometer is located between the liquid outlet of the first-stage heat exchanger and the second three-way valve. The third thermometer is located between the outlet of the first-stage heat exchanger and the third three-way valve.

Images