TWM447388U - Energy-saving heater for reusing waste hot gas of thermal treatment equipment - Google Patents

Description

Energy-saving heating device for recycling waste heat of heat treatment equipment

The present invention relates to an energy-saving heating device for recycling waste heat of a heat treatment equipment, in particular to a waste heat recovery and reuse for heating a heat-conductive medium, and the heat-conducting medium is used for cleaning the surface of the metal workpiece to remove dirt and grease to save electric heat. Energy-saving device for heat treatment waste heat recovery for energy purposes.

In order to improve the mechanical properties of metal workpieces such as screws, bolts, nuts or nails or to prevent rust, metal workpieces are usually heat treated or surface treated.

Taking the blackening anti-rust treatment as an example, the surface blackening and anti-rust treatment of the metal workpiece in the heat treatment process is carried out through a continuous heat treatment device. The following is a detailed description of the heat treatment equipment and its pre-operation. First, In the process, the processed metal workpiece is sent to the front degreasing cleaning tank by an automatic feeder to perform a surface degreasing process, and after removing the lubricating oil attached to the surface of the metal workpiece, the blower is blown by a blower. Finishing the quenching pre-operation, then feeding the metal workpiece into the quenching zone at the front end of the heat treatment equipment for heating (about 820 °C to 900 °C), and simultaneously injecting gases such as methanol and propane to prevent decarburization of the metal workpiece surface. Then, the metal workpiece is rapidly cooled (quenched) by oil quenching to cause a hardening reaction, and then the metal workpiece is transported to the heated degreasing washing tank for grease cleaning operation and blown by a blower, and finally sent. The metal workpiece is tempered in the tempering zone, and the metal workpiece is slowly cooled down by the room temperature.

In the whole process of the above heat treatment, the quenching zone utilizes an exhaust gas combustion heater disposed at the top of the front end of the heat treatment apparatus to supply hot gas to the quenching zone with the heat output end facing downward, so that the metal workpiece can be heated by the gas through the quenching zone. At this time, due to the principle that the hot body is heated up, it will directly dissipate from the top of the exhaust gas combustion heater from the external space, resulting in a situation in which many waste heats are not fully utilized.

The main purpose of this creation is to provide an energy-saving heating device for recycling waste heat of heat treatment equipment, and to create and improve the high-temperature gas used in the current heat treatment equipment for heating metal workpieces to easily escape to the outside of the equipment, and excessively consume electric heat. The problem can be.

In order to achieve the goal, the energy-saving heating device for recycling waste heat of the heat treatment equipment is used for installing the preheating section of the furnace body of the heat treatment equipment, and the energy-saving heating device comprises: an exhaust gas combustion heater, which is used for The exhaust gas combustion heater is disposed at the bottom of the preheating section of the furnace body, and the exhaust gas combustion heater comprises a heat output end connected to the bottom of the preheating section of the furnace body, and the exhaust gas combustion heater can be preheated from the bottom to the furnace body Heating; and a heat recovery device disposed at the top of the preheating section of the furnace and offset from the exhaust gas combustion heater, the heat recovery unit comprising a hollow insulated housing and a heat pipe The internal space of the body is connected to the preheating section of the furnace body. The heat pipe is disposed in the heat insulating casing, and both ends of the heat pipe extend outside the heat insulating casing, and the heat pipe can be introduced into the heat conducting medium, and the heat conducting medium can pass the heat. The conduit absorbs heat and transfers heat recovery to the external use end.

As can be seen from the above, the creation department sets the exhaust gas combustion heater. At the bottom of the preheating section of the furnace body of the heat treatment equipment, the exhaust gas combustion heater can supply heat to the preheating section of the furnace body through the heat output end, so that the metal workpiece passing through the preheating section of the furnace body can achieve the purpose of heating up, and further Save the consumption of electric heating power.

At the same time, the high temperature gas will flow into the heat recovery device, and transfer heat energy to the outer surface of the heat pipe, so that the heat transfer medium in the heat pipe can be heated by absorbing heat energy, and the heat transfer medium can be transferred to the heat treatment device, In addition to the preheating cleaning of the metal workpiece before entering the heat treatment equipment or the surface cleaning of the metal workpiece after oil quenching, in addition, the creation system is applied to the quenching zone of the preheating section of the furnace body. At this time, the high-temperature gas containing carbon monoxide and carbon dioxide which passes upward through the heat insulating casing can be introduced into the tempering zone in the rear section of the heat treatment apparatus for reuse, thereby providing the blackening treatment of the metal workpiece. It can be known from the above that the present invention can fully utilize the high-temperature gas escaping from the preheating section of the furnace to be recovered into the heat treatment furnace to help heat up, save electric heat, and heat the heat transfer medium to remove the metal workpiece. The fat program, and the burned exhaust gas body can be further introduced into the tempering zone to blacken the metal workpiece, thereby fully utilizing the residual value of the recovered waste heat exhaust gas to achieve the purpose of energy saving and carbon reduction.

In order to understand the technical features and practical functions of the present invention in detail, and in accordance with the contents of the specification, the following is further illustrated in the preferred embodiment as illustrated in the following:

A preferred embodiment of the energy-saving heating device for recycling waste heat of the heat treatment apparatus of the present invention is as shown in FIG. 1 , wherein the energy-saving heating device is disposed in a preheating section of the furnace body of a heat treatment apparatus 1 2, the energy-saving heating device comprises an exhaust gas combustion heater 10 and a heat energy recovery device 20.

As shown in FIG. 1, the exhaust gas combustion heater 10 is disposed at the bottom of the furnace preheating section 2, and the exhaust gas combustion heater 10 includes a heat output end 11 which is connected to the furnace body for preheating. At the bottom of section 2, the exhaust gas combustion heater 10 is capable of supplying high temperature gas to the furnace body preheating section 2 from the bottom to the top.

As shown in FIG. 1, the thermal energy recovery unit 20 includes a hollow insulated housing 21 and a heat pipe 22 disposed on the top of the furnace preheating section 2 and associated with the exhaust gas combustion heater. 10 is misaligned, the inner space of the heat insulating casing 21 is communicated with the furnace preheating section 2, the heat pipe 22 is disposed in the heat insulating casing 21, and both ends of the heat pipe 22 protrude outside the heat insulating casing 21. The heat pipe 22 can introduce a heat transfer medium, and the heat transfer medium can absorb heat through the heat pipe 22 to recover heat and transfer it to the external use end.

As shown in FIG. 1 , the heat pipe 22 is a hollow spiral tube for providing a heat conductive medium flowing therein. The hollow spiral tube has an input end and an output end respectively formed at two ends thereof, and the input end is connected to an external portion. The supply of the heat transfer medium device, the output end can be further divided into two output pipes, wherein an output pipe can drain the heat transfer medium to the outside of the heat treatment device 1 for preheating cleaning of the metal workpiece before entering the heat treatment device 1, and the other output pipe is The heat conductive medium can be drained to the heat treatment device 1 to perform surface oil stain cleaning on the metal workpiece subjected to oil quenching and cooling.

As shown in FIG. 1 , the energy saving device may further include an air door device 30 disposed above the inlet end of the heat treatment device 1 , the air door device 30 including a body and a fan. The body has an accommodating space, an air outlet disposed under the body, and a plurality of air outlets The air inlet and the air inlet are both connected to the accommodating space, and the fan unit is disposed in the accommodating space of the body, and the air door device 30 is used to heat the inside and outside of the heat treatment device 1 The separation is performed to prevent the high temperature gas in the preheating section 2 of the furnace from directly escaping from the inlet end of the heat treatment apparatus 1 to the outside, thereby causing waste of heat energy.

As shown in FIG. 1 , the energy-saving heating device may further include a fan device 40 that is disposed downwardly above the furnace body preheating section 2 and on the side of the heat energy recovery unit 20 . .

The furnace preheating section 2 comprises a quenching zone and a tempering zone. In the preferred embodiment, as shown in FIG. 2, the furnace preheating section 2 is located in the quenching zone at the front end of the heat treatment apparatus 1. When the exhaust gas combustion heater 10 burns the combustion products, the high temperature gas is continuously supplied to the quenching zone. At this time, the fan device 40 disposed at the top of the quenching zone can assist the air to be uniformly blown into the quenching zone. The metal workpiece 50 passing through the quenching zone can be uniformly and rapidly heated, and the heat recovery device 20 disposed on the side of the fan unit 40 can smelt the exhaust gas body to the rear end of the heat treatment apparatus 1 on the one hand. The zone is reused to provide the metal workpiece 50 with one of the carbon oxides and carbon dioxide required for the blackening process.

On the other hand, the heat recovery device 20 can also transfer the heat energy to the outer surface of the heat pipe 22 through the high temperature gas flowing through the heat insulating casing 21, so that the heat conductive medium in the heat pipe 22 can generate a heating effect by absorbing heat energy, and will conduct heat. The medium is separately sent to the outside of the heat treatment equipment 1 to clean the metal workpiece 50 before entering the heat treatment equipment 1, and the surface of the oil-quenched metal workpiece 50 is cleaned by surface oil to assist in the process of pre-fat cleaning and post-degreasing cleaning. .

The creation can fully recover and reuse the high-temperature gas escaping from the preheating section 2 of the furnace body, assist the temperature of the furnace to heat up, heat the heat conductive medium, and clean the grease removal procedure of the metal workpiece 50 by using the heat conductive medium. When the preheating section 2 of the furnace body is in the quenching zone, the burned exhaust gas body can be introduced into the tempering zone to blacken the metal workpiece 50, thereby fully utilizing the residual value of the recovered waste hot gas to save energy. The purpose of carbon reduction.

The above description is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Anyone having ordinary skill in the art can use the present invention without departing from the technical features proposed by the present invention. Equivalent embodiments of the local changes or modifications made by the technical content disclosed herein are still within the scope of the features of the present invention.

1‧‧‧heat treatment equipment

2‧‧‧furnace preheating section

10‧‧‧Exhaust gas combustion heater

11‧‧‧Hot output

20‧‧‧ Thermal energy recovery unit

21‧‧‧Insulated housing

22‧‧‧heat pipe

30‧‧‧Air door installation

40‧‧‧Fan device

50‧‧‧Metal workpiece

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view showing a preferred embodiment of an energy-saving heating device for recycling waste heat of the heat treatment apparatus of the present invention.

Fig. 2 is a view showing an implementation state of a preferred embodiment of the energy-saving heating device for recycling waste heat of the heat treatment equipment of the present invention.

1‧‧‧heat treatment equipment

2‧‧‧furnace preheating section

10‧‧‧Exhaust gas combustion heater

11‧‧‧Hot output

20‧‧‧ Thermal energy recovery unit

21‧‧‧Insulated housing

22‧‧‧heat pipe

30‧‧‧Air door installation

40‧‧‧Fan device

Claims (4)

An energy-saving heating device for recycling waste heat of a heat treatment device is used for setting a preheating section of the furnace body of the heat treatment device, wherein the energy-saving heating device comprises: an exhaust gas combustion heater, which is used for setting in the furnace At the bottom of the body preheating section, the exhaust gas combustion heater includes a heat output end connected to the bottom of the preheating section of the furnace body, and the exhaust gas combustion heater can supply heat to the furnace body preheating section from bottom to top; a thermal energy recovery device is disposed at the top of the preheating section of the furnace and is misaligned with the exhaust gas combustion heater. The thermal energy recovery device comprises a hollow insulated casing and a heat pipe, and the internal space of the insulated casing is connected In the preheating section of the furnace body, the heat pipe is disposed in the heat insulating casing, and both ends of the heat pipe extend outside the heat insulating casing, wherein the heat pipe can introduce a heat transfer medium, and the heat conductive medium can absorb heat through the heat pipe. The heat recovery is transferred to the external use end. An energy-saving heating device for recycling waste heat of a heat treatment apparatus according to claim 1, wherein the energy-saving heating device further comprises an air door device disposed above an inlet end of the heat treatment device; the air The door device comprises a body and a fan set, the body has a receiving space, an air outlet disposed under the body, and a plurality of air inlets disposed in front of the body, wherein the air outlet and the air inlet are connected to each other. The fan unit is disposed in the accommodating space of the body. An energy-saving heating device for recycling waste heat of a heat treatment apparatus according to claim 1 or 2, wherein the energy-saving heating device further comprises a fan device, wherein the fan device is disposed downwardly in the preheating zone of the furnace body At the top of the section and on the side of the heat recovery unit. An energy-saving heating device for recycling waste heat of a heat treatment apparatus according to claim 3, wherein the heat pipe is a hollow spiral pipe.