CN218811888U - Annealing slow cooling heat recycling device of heat treatment tunnel furnace - Google Patents

Abstract

The utility model discloses a heat treatment tunnel furnace's annealing slow cooling heat recovery utilizes device, including low temperature hot water tank, heat absorption formula heat exchanger slowly, store hot water tank and hot water supply pipeline, this heat exchanger is including flange and the casing that links firmly, a pair of U-shaped heat exchange tube and adiabatic stopping, the adiabatic stopping is sealed at the casing port through high temperature sealed glue, its each lower extreme that stretches out the flange outside of a pair of U-shaped heat exchange tube links to each other back rethread hot water entry takeover and warm water feed pipe connection through the warm water distributing pipe of intaking that connects jointly with warm water entry, and its hot water delivery pipe of rethread is connected with the hot water storage water tank after each upper end that stretches out the flange outside links to each other with the hot water outlet takeover through the hot water export manifold of connecting jointly, store hot water tank lower part and connect hot water supply pipeline in order to be used for providing the required work heat source of refrigeration for lithium bromide refrigerating system. The heat slowly absorbed by the device can be supplied to a working heat source of a lithium bromide system, and the heat in the box is reduced according to the annealing slow cooling working condition.

Description

Annealing slow cooling heat recycling device of heat treatment tunnel furnace

[ technical field ] A method for producing a semiconductor device

The utility model relates to a heat treatment tunnel furnace's annealing slow cooling heat recycle device belongs to the recycle technical field of heat treatment tunnel furnace high temperature difference used heat.

[ background of the invention ]

In the shearing and blanking process of the silicon steel sheet for the motor, the internal stress and physical properties are changed due to plastic deformation, so that the hardness of a cold-work hardening area is increased, the magnetic conductivity is deteriorated, and the iron loss is increased. Therefore, a cold-rolled workpiece needs to be placed into a continuous tunnel furnace to be annealed and slowly cooled when passing through an annealing box body during the process of traveling, the box temperature needs to be subjected to the processes of raising the temperature to about 800 ℃, keeping the temperature for 2 hours and reducing the temperature to about 450-500 ℃ during annealing and slow cooling of the cold-rolled workpiece, the traditional annealing and slow cooling means adopts an indirect air cooling mode, and the box temperature is controlled by a fan when the temperature is close to the bluing temperature (see patent number 201010229889.2 and patent name of the technology is a continuous annealing bluing technology for the cold-rolled silicon steel sheet punching piece workpiece).

How to recover the waste heat generated during annealing and slow cooling treatment and use the waste heat as the working heat source for lithium bromide refrigeration is a subject to which those skilled in the art are eagerly demanding research and effort.

[ Utility model ] content

The utility model aims at providing an annealing slow cooling heat recovery utilizes device of heat treatment tunnel furnace.

Therefore, the utility model provides a following technical scheme:

the annealing slow cooling heat recycling device of the heat treatment tunnel furnace comprises a low-temperature warm water tank, a high-temperature-difference slow heat absorption type heat exchanger, a hot water storage tank and a hot water supply pipeline, wherein the high-temperature-difference slow heat absorption type heat exchanger is arranged in an annealing box body of the heat treatment tunnel furnace, the high-temperature-difference slow heat absorption type heat exchanger comprises a flange fixed on the outer wall of the annealing box body, a shell with a port fixed towards the flange, a pair of U-shaped heat exchange tubes positioned in the shell and a heat insulation filling material positioned in the shell and used for fixing the U-shaped heat exchange tubes, the heat insulation filling material is sealed at the port of the shell through high-temperature sealant, the lower ends of the pair of U-shaped heat exchange tubes, extending out of the flange, are connected with warm water inlet connecting pipes through commonly connected warm water inlet distributing pipes, the upper ends, extending out of the flange, are connected with hot water outlet connecting pipes through commonly connected hot water outlet collecting pipes, the warm water inlet connecting pipes are connected with a warm water supply pipe arranged at the lower part of the low-temperature warm water tank, and the hot water storage tank is connected with the hot water supply pipeline so as to provide a working heat source required by refrigeration for a lithium bromide refrigeration system.

As further improvement and perfection, the utility model discloses still including the water control valve of taking the temperature sensing package, the temperature sensing package is tied up and is pasted on hot water conveying pipeline's wall install the water control valve on the warm water feed pipe, the temperature sensing package is through measuring hot water conveying pipeline's temperature height come the aperture of controlling the water control valve with the discharge of adjusting the warm water feed pipe.

Preferably, the hot water supply pipeline is formed by sequentially connecting an access pipe section, a hot water outlet stop valve, a first connecting pipe section, a hot water supply pump, a second connecting pipe section, a check valve and an output pipe section, wherein the access pipe section is connected to the lower part of the hot water storage tank; the output pipe section is connected to a lithium bromide refrigeration system; the high-temperature hot water is pressurized by a water pump to drive the high-temperature hot water to do work and circularly flow in a generator of the lithium bromide refrigerating system.

Preferably, the high-temperature water working heat source is used for cooling the cold energy carried by the energy conversion after refrigeration, and the cooled warm water is connected with a warm water return port arranged at the upper part of the low-temperature warm water tank through a warm water return pipeline.

The utility model discloses following beneficial effect has:

the high-temperature-difference slow heat absorption type heat exchanger is adopted, liquid carrier water is used as a heat exchange medium, high-temperature-difference waste heat generated by slow cooling of an annealing box body of a tunnel furnace is subjected to heat treatment, heat outside the tube and inside the box is continuously and slowly absorbed through water flowing in a U-shaped heat exchange tube, after the heat in the box is slowly absorbed, the box temperature of the annealing box body is reduced according to the requirement of an annealing slow cooling working condition, warm water after the heat is absorbed is changed into hot water and can be provided for a lithium bromide refrigeration system to serve as a working heat source, and the lithium bromide refrigeration system generates cold energy through energy conversion to cool a workshop, so that the waste of industrial energy is greatly reduced, and the purpose of waste heat recycling is achieved.

After the technical scheme is adopted, the method that a fan needs to be used for indirect air cooling in annealing slow cooling in the background technology can be abandoned, and therefore the power consumption required by the fan for air cooling is saved.

[ description of the drawings ]

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;

fig. 3 is a sectional view taken along line B-B of fig. 1.

[ detailed description ] embodiments

Referring to fig. 1 to 3, an annealing slow cooling heat recycling device for a heat treatment tunnel furnace comprises a low temperature water tank 1, a high temperature difference slow heat absorption type heat exchanger installed in an annealing box body of the heat treatment tunnel furnace (conventional equipment is not shown), a heat storage water tank 3 and a hot water supply pipeline 4, wherein the high temperature difference slow heat absorption type heat exchanger is used for recycling high temperature difference heat generated by slow cooling of the box temperature in the annealing process, the high temperature difference slow heat absorption type heat exchanger comprises a flange 2a fixed on the outer wall of the annealing box body, a shell 2b with a port welded and fixed towards the flange, a pair of U-shaped heat exchange tubes 23 located in the shell and a heat insulation filler 2c located in the shell and used for fixing the U-shaped heat exchange tubes, the heat insulation filler is sealed at the port of the shell by a high temperature sealant 2d, the lower ends of the pair of the U-shaped heat exchange tubes 23 extending out of the flange 2a are connected with a warm water inlet distribution pipe 21 by a commonly connected warm water inlet pipe 22, the upper ends of the pair of the U-shaped heat exchange tubes 23 extending out of the flange 2a commonly connected with a warm water outlet pipe 24 connected with a warm water inlet pipe 21, the warm water tank is connected with a refrigeration water supply pipe 3 connected with a refrigeration water storage water tank 3, and a refrigeration water supply system for supplying lithium bromide to supply system by a hot water supply pipe 4 connected with the lower part of the hot water storage water tank.

Further, the utility model discloses still including the water control valve TC of taking temperature sensing package T, the temperature sensing package is tied up and is pasted on hot water pipeline P's wall, installs water control valve TC on the warm water feed pipe 11, and temperature sensing package T controls the aperture of water control valve TC through the temperature height of measuring hot water pipeline P with the discharge of adjusting warm water feed pipe 11.

Further, the hot water supply line 4 is formed by connecting an inlet pipe section 40, a hot water outlet stop valve 4a, a first connecting pipe section 41, a hot water supply pump M, a second connecting pipe section 42, a check valve 4b and an outlet pipe section 400 in sequence, wherein the inlet pipe section 40 is connected to the lower part of the hot water storage tank 1; output tube section 400 is connected to a lithium bromide refrigeration system; the high-temperature hot water is pressurized by a water pump M to make the high-temperature hot water do work and circularly flow in a generator of the lithium bromide refrigeration system.

Further, the high-temperature water working heat source is used as warm water which is cooled by the cold energy carried by the energy conversion after refrigeration, and is connected with a warm water return port 12 arranged at the upper part of the low-temperature warm water tank 1 through a warm water return pipeline.

The bottom of the low-temperature warm water tank 1 is connected with a water discharge blow-off valve 13 through a connecting pipe (not marked). The shell 2b adopts a stainless steel seamless circular tube; the U-shaped heat exchange tube 23 is made of a copper tube with excellent heat conductivity; the heat insulation filling material 2C is uniformly distributed in the shell 2a by adopting magnesium oxide in a vibration filling mode, has heat insulation performance and can also slowly transfer heat, so that the U-shaped heat exchange tube 23 can slowly absorb the heat of slow cooling of the annealing box body in a high temperature difference environment.

The water circuit is as follows: the low-temperature water supply pipe 11 is characterized in that the temperature water supplied by the low-temperature water tank 1 flows into a temperature water inlet connecting pipe 21, the temperature water flowing through the temperature water inlet connecting pipe 21 enters a temperature water inlet distribution pipe 22 in a self-suction manner and flows into the lower end openings of corresponding U-shaped heat exchange pipes 23 through two output pipe openings respectively arranged on the pipe, so that the temperature water divided into two paths flows in a pair of U-shaped heat exchange pipes 23 to absorb heat outside the pipe and inside the tank, the heated hot water is enabled to continuously flow towards the upper part of each pair of U-shaped heat exchange pipes 23 in a temperature difference state, the hot water flows into two input pipe openings of a hot water outlet collecting pipe 24 in two paths through the upper end openings of the two pairs of heat exchange pipes 23 and then is collected and flows into a hot water outlet connecting pipe 25, then the hot water is conveyed into a hot water storage tank 3 through a hot water conveying pipeline P, the hot water tank 3 conveys the hot water into a lithium bromide refrigerating system through a hot water supply pipeline 4 to be used as a working heat source required by refrigeration, and the warm water flowing out of the lithium bromide refrigerating system finally flows back into the low-temperature water storage tank 1 through a warm water pipeline (not shown in the figure).

After the device is adopted, the box temperature of the annealing box body of the heat treatment tunnel furnace can be slowly cooled to 450-500 ℃ from 800 ℃, and the device absorbs the high temperature difference heat generated in the slow cooling process.

Claims (4)

1. The utility model provides a heat treatment tunnel furnace's annealing slow cooling heat recycle device which characterized in that: comprises a low-temperature warm water tank, a high-temperature difference slow heat absorption type heat exchanger arranged in an annealing box body of a heat treatment tunnel furnace, a hot water storage tank and a hot water supply pipeline,

the high-temperature-difference slow heat absorption type heat exchanger comprises a flange fixed on the outer wall of an annealing box body, a shell with a port fixed towards the flange, a pair of U-shaped heat exchange tubes positioned in the shell, and heat insulation filler positioned in the shell and used for fixing the U-shaped heat exchange tubes, wherein the heat insulation filler is sealed at the port of the shell through high-temperature sealant, the lower ends of the pair of U-shaped heat exchange tubes extending out of the flange are connected with a warm water inlet connecting pipe through a warm water inlet distributing pipe which is commonly connected, and the upper ends of the pair of U-shaped heat exchange tubes extending out of the flange are connected with a hot water outlet connecting pipe through a hot water outlet collecting pipe which is commonly connected,

the warm water inlet connecting pipe is connected with a warm water feeding pipe arranged at the lower part of the low-temperature warm water tank, the hot water outlet connecting pipe is connected with the hot water storage tank through a hot water conveying pipeline, and the lower part of the hot water storage tank is connected with a hot water supply pipeline so as to provide a working heat source required by refrigeration for the lithium bromide refrigeration system.

2. The annealing slow cooling heat recycling device of a heat treatment tunnel furnace according to claim 1, further comprising a water flow control valve having a bulb, wherein the bulb is attached to a wall of the hot water supply pipe, the water flow control valve is installed on the warm water supply pipe, and the bulb controls an opening of the water flow control valve by measuring a temperature of the hot water supply pipe to adjust a flow rate of the warm water supply pipe.

3. The annealing slow cooling heat recycling device of the heat treatment tunnel furnace according to claim 1, characterized in that: the hot water supply pipeline is formed by sequentially connecting an access pipe section, a hot water outlet stop valve, a first connecting pipe section, a hot water supply pump, a second connecting pipe section, a check valve and an output pipe section, wherein the access pipe section is connected to the lower part of the hot water storage tank; the output pipe section is connected to a lithium bromide refrigeration system; the high-temperature hot water is pressurized by a water pump to make the high-temperature hot water do work and circularly flow in a generator of the lithium bromide refrigeration system.

4. The annealing slow-cooling heat recovery and utilization device of a heat treatment tunnel furnace according to claim 1, 2 or 3, characterized in that warm water cooled by cold energy carried by energy conversion after a high-temperature water working heat source is used for refrigeration is connected to a warm water return port provided at an upper portion of the low-temperature warm water tank through a warm water return pipeline.

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