Setting machine condensate water waste heat recovery heat exchange device and system

Abstract

The utility model provides a setting machine condensate water waste heat recovery heat exchange device and system. The heat exchange device comprises a heat exchange box body arranged outside a drying oven and a heat exchange mechanism arranged in the heat exchange box body. The heat exchange mechanism is provided with a water inlet and a water outlet, and the water outlet is communicated with the condensate water outlet of the drying oven; the heat exchange box body is provided with an air inlet and an air outlet, air flowing in from the air inlet flows through the heat exchange mechanism for heat exchange and then flows out from the air outlet, the heat exchange device can effectively recycle waste heat of high-temperature condensate water discharged by the drying oven, and the air supply device sends hot air subjected to heat exchange through the heat exchange device back into the drying oven for reuse. The heat energy is utilized to a greater extent, the energy consumption is reduced, the production cost is better saved, and higher profits are created for enterprises.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, and in particular to a heat exchange device and system for recovering waste heat of condensed water from a setting machine. Background Art

[0002] In the common oven steam heating system of the setting machine on the market, the condensed water in the oven is mainly discharged by throttling nozzles. After the condensed water is discharged from the oven, it is recycled to the flash tank and used as low-pressure steam or directly discharged when it cannot be used. Due to the high cost of medium-pressure steam, the discharged condensed water carries a large amount of heat energy, causing great waste. In the past, the built-in heat exchange box of the oven was small in size due to the space limitation in the oven, and the temperature of the air inside the oven was also very high, resulting in low heat exchange efficiency and high discharged water temperature, which could not achieve the effect of energy saving and emission reduction.

[0003] Therefore, how to effectively utilize thermal energy, save costs, and develop a heat exchange device specifically for condensate waste heat recovery is a technical problem that needs to be urgently solved in this field. Utility Model Content

[0004] The utility model aims at the technical problem that the waste heat of condensed water in the existing shaping machine oven cannot be effectively utilized, and provides a heat exchange device for recovering the waste heat of condensed water, which can maximize the utilization of the heat energy of condensed water discharged from the oven, thereby achieving the purpose of cost saving.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A heat exchange device for recovering waste heat from condensed water of a setting machine, comprising a heat exchange box arranged outside an oven and a heat exchange mechanism arranged inside the heat exchange box;

[0007] The heat exchange mechanism has a water inlet and a water outlet, and the water outlet is connected to the condensed water outlet of the oven;

[0008] The heat exchange box has an air inlet and an air outlet. The gas flowing in from the air inlet flows through the heat exchange mechanism and then flows out from the air outlet.

[0009] As an improvement of the above solution, the water inlet is arranged close to the air outlet, and the water outlet is arranged close to the air inlet.

[0010] As an improvement of the above solution, the heat exchange box is a rectangular box, and the air inlet and the air outlet are respectively arranged at two ends of the heat exchange box.

[0011] As an improvement of the above scheme, the heat exchange mechanism includes a plurality of heat exchange tubes arranged at intervals in the heat exchange box and a fin module arranged on the heat exchange tubes. The adjacent heat exchange tubes are connected end to end in sequence through curved pipes, and the heat exchange tubes at the head end and the tail end are respectively connected to the water inlet and the water outlet.

[0012] As an improvement of the above solution, a thermal insulation rock wool board is provided on the heat exchange box body on the outer side of the bent pipe.

[0013] As an improvement of the above solution, the fin module is composed of a plurality of fin units which are sequentially and spaced apart from each other and arranged axially along the heat exchange tube.

[0014] As an improvement of the above solution, a temperature probe and an electric regulating valve are installed on the water inlet pipe and / or the water outlet pipe.

[0015] As an improvement of the above solution, a filter is provided on the air inlet.

[0016] Another object of the present application is to provide a heat exchange system for recovering waste heat from condensed water of a setting machine, comprising an air supply device and the above-mentioned heat exchange device for recovering waste heat from condensed water of a setting machine;

[0017] The air supply device is arranged between the air outlet and the oven, and is used to transport the gas after heat exchange in the heat exchange device for recovering waste heat from condensed water of the setting machine from the air outlet to the oven.

[0018] As an improvement of the above solution, the air supply device includes an air supply mechanism provided on the air outlet and an air supply duct connected between the air supply mechanism and the oven.

[0019] As an improvement of the above solution, the air supply mechanism includes an air supply motor, and the air supply motor is controlled by a variable frequency PLC.

[0020] Implementing the embodiments of the utility model has the following beneficial effects:

[0021] The present application provides a heat exchange device and system for recovering waste heat from condensed water of a setting machine. The heat exchange device can effectively recover waste heat from high-temperature condensed water discharged from an oven, and the air supply device returns the hot air after heat exchange by the heat exchange device to the oven for reuse, thereby making greater use of thermal energy, reducing energy consumption, better saving production costs, and creating higher profits for the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a schematic diagram of the structure of a heat exchange device for recovering waste heat from condensed water of a setting machine according to an embodiment of the present application;

[0024] Figure 2 This is an exploded schematic diagram of a heat exchange device for recovering waste heat from condensed water of a setting machine according to an embodiment of the present application;

[0025] Figure 3 This is a structural schematic diagram of a heat exchange system for recovering waste heat from condensed water of a setting machine according to an embodiment of the present application;

[0026] Figure 4 This is a schematic diagram of the structure of a heat exchange system for recovering waste heat from condensed water of a setting machine applied to a drying oven of the setting machine in an embodiment of the present application;

[0027] Figure 5 It is a schematic structural diagram from a top view of a heat exchange system for recovering waste heat from condensed water of a setting machine according to an embodiment of the present application, applied to an oven of the setting machine. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1-5 As shown, the embodiment of the present application provides a heat exchange device for recovering waste heat of condensed water of a setting machine, comprising a heat exchange box body 2 arranged outside an oven 1 and a heat exchange mechanism 3 arranged in the heat exchange box body 2; the heat exchange mechanism 3 has a water inlet 31 and a water outlet 32, and the water outlet 32 ​​is connected to the condensed water outlet of the oven 1, so as to effectively utilize the waste heat of the condensed water; the heat exchange box body 2 has an air inlet 21 and an air outlet 22, and the gas flowing in from the air inlet 21 flows through the heat exchange mechanism 3 and then flows out from the air outlet 22 after heat exchange, and finally the gas after heat exchange is sent back to the oven for reuse, so as to effectively recover the waste heat of the high-temperature condensed water discharged from the oven, and send the hot air back to the oven for reuse after heat exchange, so as to utilize the thermal energy to the maximum extent, reduce the energy consumption, better save the production cost, and create higher profits for the enterprise.

[0030] Furthermore, the water inlet 31 is arranged on the side close to the air outlet 22, and the water outlet 32 ​​is arranged on the side close to the air inlet 21. The present application adopts countercurrent heat exchange, and the flow direction of the condensed water is opposite to the direction of the fresh air. The fresh cold air passes through the long-stroke heat exchange box in the form of countercurrent to fully exchange heat, and finally the hot air is sent back to the oven for reuse. The discharged high-temperature condensed water is converted into hot water below 100°C after heat exchange, which can make the heat transfer more efficient.

[0031] Furthermore, the heat exchange box 2 is a rectangular box, and the air inlet 21 and the air outlet 22 are respectively arranged at both ends of the heat exchange box 2. The heat exchange box 2 of the present application adopts a long-stroke design to increase the heat exchange area, provide more sufficient heat transfer, further enhance the energy-saving effect, and reduce operating costs. By increasing the heat exchange box with a long stroke, the heat exchange time is prolonged, the waste heat utilization rate is more efficient, and the discharged water temperature is low.

[0032] Furthermore, the heat exchange mechanism 3 includes a plurality of heat exchange tubes 301 arranged at intervals in the heat exchange box 2 and a fin module 302 arranged on the heat exchange tubes 301. The adjacent heat exchange tubes 301 are connected end to end in sequence through the elbow 303, and the heat exchange tubes 301 at the head and tail are respectively connected with the water inlet 31 and the water outlet 32. The specific embodiment of the present application adopts a tubular heat exchanger, and the long stroke of the heat exchange device can realize efficient heat transfer, improve heat transfer efficiency, and reduce energy loss in the heat transfer process: of course, this embodiment is not limited, such as using a plate heat exchanger.

[0033] Furthermore, an insulating rock wool board 24 is provided on the heat exchange box body 2 on the outside of the curved pipe 303, which has a good thermal insulation effect. The heat exchanger of the present application is also equipped with high-density insulating rock wool boards on all sides for insulation, which effectively reduces heat energy loss and improves heat exchange efficiency.

[0034] Furthermore, the fin module 302 is composed of a plurality of fin units which are arranged in sequence along the axial direction of the heat exchange tube 301. The heat exchange mechanism of the present application is designed as a long-stroke unique heat exchanger structure. The number of heat exchange tubes can be 200-300, the tube path is 2 inlets and 2 outlets, the total heat exchange stroke is 50-100 meters, the heat exchange time is long and the heat dissipation area is large. 0.2-0.5mm thick aluminum fins are used, the pitch is 3-3.5 mm, the outer diameter is 50-80, the effective heat exchange thickness is 10-20mm, and countercurrent heat exchange is adopted. The flow direction of condensed water is opposite to the direction of fresh air, which can make heat transfer more efficient. The gap between fins is 10-20mm, and the longitudinal gap is 10-25mm, which can ensure smooth air circulation during heat exchange and the fins are not easily blocked.

[0035] Furthermore, temperature probes and electric regulating valves are installed on the water inlet 31 pipe and the water outlet 32 ​​pipe; intelligent control and monitoring can be achieved, the flow rate is controlled by the electric regulating valve, and the ventilation volume is controlled by the frequency converter, automatic operation and real-time monitoring can be achieved, and operational convenience and safety are provided.

[0036] Furthermore, a filter element 23 is provided on the air inlet 21, which can increase the stability of the system, ensure that the incoming fresh air is clean and reliable, minimize the blockage of the heat exchange fin tubes that affects the ventilation efficiency, and ensure the long-term stable operation of the system.

[0037] The embodiment of the present application also provides a heat exchange system for recovering waste heat from condensed water of a setting machine, comprising an air supply device 4 and the above-mentioned heat exchange device for recovering waste heat from condensed water of a setting machine; the air supply device 4 is arranged between the air outlet 22 and the oven 1, and is used to transport the gas after heat exchange in the heat exchange device for recovering waste heat from condensed water of the setting machine from the air outlet 22 to the oven 1. The waste heat recovery device of the present application utilizes an external long-stroke heat exchange device and an additional large-volume air supply fan to fully exchange heat with fresh cold air through a long-stroke heat exchange box in a countercurrent form, and finally returns the hot air to the oven for reuse, and converts the discharged high-temperature condensed water into hot water below 100°C after heat exchange, which can effectively save heat loss and save more energy, and is recognized by customers and has a good market response. This device not only improves the cost performance of the setting machine, but also reduces energy consumption, better saves production costs, and can create higher profits for customers.

[0038] Furthermore, the air supply device 4 includes an air supply mechanism 41 arranged on the air outlet 22 and an air supply duct 42 connected between the air supply mechanism 41 and the oven 1. The present application has strong adaptability and is suitable for models with a width of B180-B380cm. It can be applied to machines of different widths by simply changing the length of the air duct. The above-mentioned heat exchange system can achieve a heat recovery rate of 5-15% according to different processes.

[0039] Furthermore, the air supply mechanism 41 includes an air supply motor, which is controlled by a variable frequency PLC and is adjustable. The air supply fan is automatically controlled by a variable frequency PLC and can automatically adjust the air volume according to different process requirements. The precise control ensures that the temperature of the discharged hot water is lower than 100°C.

[0040] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A heat exchange device for recovering waste heat from condensed water of a setting machine, characterized in that: It comprises a heat exchange box (2) arranged outside the oven (1) and a heat exchange mechanism (3) arranged inside the heat exchange box (2); The heat exchange mechanism (3) has a water inlet (31) and a water outlet (32), and the water outlet (32) is connected to the condensed water outlet of the oven (1); The heat exchange box (2) has an air inlet (21) and an air outlet (22), and the gas flowing in from the air inlet (21) flows through the heat exchange mechanism (3) for heat exchange and then flows out from the air outlet (22); The heat exchange mechanism (3) comprises a plurality of heat exchange tubes (301) arranged at intervals in the heat exchange box (2) and fin modules (302) arranged on the heat exchange tubes (301); the adjacent heat exchange tubes (301) are connected end to end in sequence through a bend tube (303); and the heat exchange tubes (301) at the head and tail ends are respectively connected to the water inlet (31) and the water outlet (32).

2. The heat exchange device for recovering waste heat from condensed water of a setting machine according to claim 1, characterized in that: The water inlet (31) is arranged on a side close to the air outlet (22), and the water outlet (32) is arranged on a side close to the air inlet (21).

3. The heat exchange device for recovering waste heat from condensed water of a setting machine according to claim 1 or 2, characterized in that: The heat exchange box (2) is a rectangular box, and the air inlet (21) and the air outlet (22) are respectively arranged at two ends of the heat exchange box (2).

4. The heat exchange device for recovering waste heat from condensed water of a setting machine according to claim 1, characterized in that: A thermal insulation rock wool board (24) is provided on the heat exchange box (2) on the outer side of the curved pipe (303).

5. The heat exchange device for recovering waste heat from condensed water of a setting machine according to claim 1, characterized in that: The fin module (302) comprises a plurality of fin units which are sequentially arranged at intervals along the axial direction of the heat exchange tube (301).

6. The heat exchange device for recovering waste heat from condensed water of a setting machine according to claim 1, characterized in that: A temperature probe and an electric regulating valve are installed on the water inlet (31) pipe and / or the water outlet (32) pipe; and / or A filter element (23) is provided on the air inlet (21).

7. A heat exchange system for recovering waste heat from condensed water of a setting machine, characterized in that: It comprises an air supply device (4) and a heat exchange device for recovering waste heat from condensed water of a setting machine according to any one of claims 1 to 6; The air supply device (4) is arranged between the air outlet (22) and the oven (1), and is used to transport the gas after heat exchange in the heat exchange device for recovering waste heat from condensed water of the setting machine from the air outlet (22) to the oven (1).

8. The heat exchange system for recovering waste heat from condensed water of a setting machine according to claim 7, characterized in that: The air supply device (4) comprises an air supply mechanism (41) provided on the air outlet (22) and an air supply duct (42) connected between the air supply mechanism (41) and the oven (1).

9. The heat exchange system for recovering waste heat from condensed water of a setting machine according to claim 8, characterized in that: The air supply mechanism (41) comprises an air supply motor, and the air supply motor is controlled by a variable frequency PLC.

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