Waste heat recovery device of tempering furnace for production
By designing a waste heat recovery device for the retrieval furnace including a heat exchange box, a heat exchange unit, an intake pipe, an outlet pipe and a return unit, a multiple bus plate and a heat exchange tube are used to contact the flue gas and the flow of the flue gas, and the circulating flow of the flue gas is realized through the return unit, the problem of insufficient heat recovery in the prior art is solved, and more efficient heat recovery is achieved.
Patent Information
- Application Number
- CN202421279346.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-06-06
AI Technical Summary
The existing heat exchange device of the tempering furnace has a simple structure, and the contact between the flue gas and the heat exchange pipe is insufficient, resulting in insufficient heat recovery and low efficiency.
A waste heat recovery device for production tempering furnace is designed, including a heat exchange box, a heat exchange unit, an intake pipe, an outlet pipe and a return air unit. The flue gas and the flowing water are fully contacted by multiple bus plates and heat exchange pipes in the heat exchange unit, and the flue gas circulating flow and heat exchange multiple times are used to fully recover heat.
The sufficient heat recovery is achieved and the efficiency is relatively higher, which solves the problem of insufficient heat recovery in the prior art.
Smart Images
Figure CN222574713U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of tempering furnace equipment, in particular to a waste heat recovery device of a tempering furnace for production. Background Art
[0002] The tempering furnace is used for tempering general metal parts in air, as well as quenching, annealing and aging heat treatment of light alloy parts such as aluminum alloy die castings, pistons, and aluminum plates. Usually, the shell of the tempering furnace is welded by steel plates and steel sections, and the trolley is welded by steel sections and steel plates. The trolley reduces heat radiation and convection losses through soft contact with the furnace lining and sand sealing mechanism, effectively ensuring the sealing of the furnace body.
[0003] When the tempering furnace is working, due to the high internal temperature, the gas discharged from the exhaust port is very hot and has high heat. If these flue gases containing a large amount of heat are directly discharged, it will cause great waste and low energy utilization efficiency. Usually, a heat exchange device is used to recycle the heat in the flue gas.
[0004] The heat exchange device currently used has a simple structure, which only uses a heat exchange tube containing a heat exchange medium to contact the flue gas, so as to use the heat exchange medium to recover the heat in the flue gas. This heat exchange device has a relatively simple structure, and the contact between the flue gas and the heat exchange tube is not sufficient, resulting in insufficient heat recovery and low efficiency. Utility Model Content
[0005] The purpose of the utility model is to provide a waste heat recovery device for a tempering furnace for production. The utility model has the advantages of sufficient heat recovery and relatively higher efficiency.
[0006] The technical solution of the utility model: a waste heat recovery device for a tempering furnace for production, comprising a heat exchange box, a heat exchange unit arranged in the heat exchange box, an air outlet pipe arranged at the top of the heat exchange box, an air inlet pipe arranged at the front end of the heat exchange box and an air return unit arranged on the heat exchange box and connecting the top of the heat exchange box and the air inlet pipe; the air inlet pipe is connected to the front end of the heat exchange box through a connecting pipe; the heat exchange box comprises a horizontally arranged first-level box body and a vertically arranged second-level box body above the right end of the first-level box body; the heat exchange unit comprises a plurality of correspondingly arranged manifolds and a plurality of heat exchange tubes evenly distributed between the manifolds; a water inlet interface is provided at the lower part of the front end of the first-level box body, and a water outlet interface is provided at the upper left end of the second-level box body; the water inlet interface and the water outlet interface are both connected to the corresponding manifolds.
[0007] In the aforementioned production tempering furnace waste heat recovery device, the air inlet pipe includes an openable and closable limit sleeve and a detachable sealed insulation sleeve arranged in the limit sleeve; the sealed insulation sleeve is provided with multiple ones according to different inner diameters; the connecting pipe is a hollow insulation pipe, and threaded grooves are provided at both ends of the connecting pipe.
[0008] In the aforementioned production tempering furnace waste heat recovery device, the manifold includes an inlet manifold, a primary manifold, a secondary manifold, a tertiary manifold and an outlet manifold; a hollow cavity is provided inside the manifold, and water flow interfaces and gas channels are evenly distributed on the manifold; the water flow interface is connected to the hollow cavity, and the heat exchange tube is detachably and sealedly connected to the water flow interface; the gas channel runs through the manifold.
[0009] In the aforementioned waste heat recovery device for the tempering furnace for production, the outer edge of the busbar is evenly distributed with limiting grooves for positioning and installation; and the inner wall of the heat exchange box is provided with positioning blocks corresponding to the limiting grooves.
[0010] In the aforementioned production tempering furnace waste heat recovery device, the water inlet manifold is connected to the water inlet interface, the water outlet manifold is connected to the water outlet interface, and the secondary manifold is connected to the tertiary manifold through a delivery pipe.
[0011] In the aforementioned waste heat recovery device for the tempering furnace for production, a monitoring unit corresponding to the air outlet pipe is provided on the inner top of the secondary heat exchange box; the monitoring unit includes a temperature sensor and a sealing valve that can be opened and closed.
[0012] In the aforementioned production tempering furnace waste heat recovery device, the return air unit includes a primary return air pipe, a secondary return air pipe and a circulation pump connecting the primary return air pipe and the secondary return air pipe; the primary return air pipe is connected to the top of the secondary heat exchange box; the secondary return air pipe is connected to the air inlet pipe.
[0013] Compared with the prior art, the present invention is composed of a heat exchange box, a heat exchange unit, an air inlet pipe, an air outlet pipe and an air return unit. The air inlet pipe is connected to the exhaust pipe of the tempering furnace, so that the flue gas is introduced into the heat exchange box, and then the heat exchange unit is used to contact the flue gas, and the heat in the flue gas is recovered by heat exchange.
[0014] By setting up an air return unit, the flue gas is circulated from the end of the heat exchange box to the air inlet pipe. The flue gas circulates in the heat exchange box for multiple heat exchanges to fully recover the heat.
[0015] The heat exchange unit is composed of multiple manifolds and multiple evenly distributed heat exchange tubes. The flue gas flows outside the heat exchange tubes, thereby fully contacting with the flowing water in the heat exchange tubes, thereby improving the heat exchange efficiency.
[0016] Therefore, the utility model has the advantages of sufficient heat recovery and relatively higher efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the utility model;
[0018] Figure 2 It is a schematic diagram of the component structure of the utility model.
[0019] The markings in the accompanying drawings are: 1-heat exchange box, 11-connecting pipe, 12-inlet pipe, 3-outlet pipe, 41-water inlet manifold, 42-primary manifold, 43-secondary manifold, 44-tertiary manifold, 45-water outlet manifold, 46-water inlet interface, 47-delivery pipe, 48-water outlet interface, 49-heat exchange pipe, 5-monitoring unit, 61-water flow interface, 62-gas channel, 63-limiting groove, 71-primary return air pipe, 72-circulation pump, 73-secondary return air pipe. DETAILED DESCRIPTION
[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.
[0021] Example. A waste heat recovery device for a tempering furnace for production, such as Figure 1 and 2 As shown, it includes a heat exchange box 1, a heat exchange unit arranged in the heat exchange box 1, an air outlet pipe 3 arranged at the top of the heat exchange box 1, an air inlet pipe 12 arranged at the front end of the heat exchange box 1 and a return air unit arranged on the heat exchange box 1 and connecting the top of the heat exchange box 1 and the air inlet pipe 12; the air inlet pipe 12 is connected to the front end of the heat exchange box 1 through a connecting pipe 11; the heat exchange box 1 includes a horizontally arranged first-level box body and a vertically arranged second-level box body above the right end of the first-level box body; the heat exchange unit includes a plurality of correspondingly arranged manifolds and a plurality of heat exchange pipes 49 evenly distributed between the manifolds; a water inlet interface 46 is provided at the lower part of the front end of the first-level box body, and a water outlet interface 48 is provided at the upper left end of the second-level box body; the water inlet interface 46 and the water outlet interface 48 are both connected to the corresponding manifolds.
[0022] The air inlet pipe 12 includes an openable and closable limiting sleeve and a detachable sealing and heat-insulating sleeve disposed inside the limiting sleeve; a plurality of sealing and heat-insulating sleeves are provided according to different inner diameters; the connecting pipe 11 is a hollow heat-insulating pipe, and threaded grooves are provided at both ends of the connecting pipe 11.
[0023] The air inlet pipe 12 can select a sealing insulation sleeve with a corresponding inner diameter according to actual needs, and then be installed on the exhaust pipe of the tempering furnace. The flue gas directly enters the heat exchange box, reducing contact with the outside and reducing heat loss.
[0024] The baffle includes an inlet baffle 41, a primary baffle 42, a secondary baffle 43, a tertiary baffle 44 and an outlet baffle 45; a hollow cavity is arranged inside the baffle, and water flow interfaces 61 and gas channels 62 are evenly distributed on the baffle; the water flow interfaces 61 are connected to the hollow cavity, and the heat exchange tube 49 is detachably and sealedly connected to the water flow interfaces 61; the gas channel 62 runs through the baffle.
[0025] Limiting grooves 63 for positioning and installation are evenly distributed on the outer edge of the busbar; and positioning blocks corresponding to the limiting grooves 63 are provided on the inner wall of the heat exchange box 1 .
[0026] The water inlet manifold 41 is connected to the water inlet interface 46 , the water outlet manifold 45 is connected to the water outlet interface 48 , and the secondary manifold 43 is connected to the tertiary manifold 44 via a delivery pipe 47 .
[0027] A monitoring unit 5 corresponding to the air outlet pipe 3 is provided on the inner top of the secondary heat exchange box; the monitoring unit 5 includes a temperature sensor and a sealing valve that can be opened and closed.
[0028] The air return unit includes a primary air return pipe 71 , a secondary air return pipe 73 and a circulation pump 72 connecting the primary air return pipe 71 and the secondary air return pipe 73 ; the primary air return pipe 71 is connected to the top of the secondary heat exchange box; the secondary air return pipe 73 is connected to the air inlet pipe 12 .
Claims
1. The waste heat recovery device of the tempering furnace for production is characterized by: The invention comprises a heat exchange box (1), a heat exchange unit arranged in the heat exchange box (1), an air outlet pipe (3) arranged at the top of the heat exchange box (1), an air inlet pipe (12) arranged at the front end of the heat exchange box (1), and an air return unit arranged on the heat exchange box (1) and connecting the top of the heat exchange box (1) and the air inlet pipe (12); the air inlet pipe (12) is connected to the front end of the heat exchange box (1) through a connecting pipe (11); the heat exchange box (1) comprises a first-stage box body arranged horizontally and a second-stage box body arranged vertically above the right end of the first-stage box body; the heat exchange unit comprises a plurality of correspondingly arranged manifolds and a plurality of heat exchange pipes (49) evenly distributed between the manifolds; a water inlet interface (46) is arranged at the lower part of the front end of the first-stage box body, and a water outlet interface (48) is arranged at the upper left end of the second-stage box body; the water inlet interface (46) and the water outlet interface (48) are both connected to the corresponding manifolds.
2. The waste heat recovery device for tempering furnace for production according to claim 1 is characterized in that: The air inlet pipe (12) comprises an openable and closable limiting sleeve and a detachable sealing and heat-insulating sleeve disposed in the limiting sleeve; a plurality of sealing and heat-insulating sleeves are provided according to different inner diameters; the connecting pipe (11) is a hollow heat-insulating pipe, and both ends of the connecting pipe (11) are provided with threaded grooves.
3. The waste heat recovery device for tempering furnace for production according to claim 1 is characterized in that: The manifold comprises an inlet manifold (41), a primary manifold (42), a secondary manifold (43), a tertiary manifold (44) and an outlet manifold (45); a hollow cavity is arranged inside the manifold, and water flow interfaces (61) and gas channels (62) are evenly distributed on the manifold; the water flow interfaces (61) are connected to the hollow cavity, and the heat exchange tube (49) is detachably sealed and connected to the water flow interfaces (61); and the gas channels (62) run through the manifold.
4. The waste heat recovery device for tempering furnace for production according to claim 3 is characterized in that: Limiting grooves (63) for positioning and installation are evenly distributed on the outer edge of the collector plate; and positioning blocks corresponding to the limiting grooves (63) are provided on the inner wall of the heat exchange box (1).
5. The waste heat recovery device for tempering furnace for production according to claim 3 is characterized in that: The water inlet manifold (41) is connected to the water inlet interface (46), the water outlet manifold (45) is connected to the water outlet interface (48), and the secondary manifold (43) is connected to the tertiary manifold (44) via a delivery pipe (47).
6. The waste heat recovery device for tempering furnace for production according to claim 1 is characterized in that: A monitoring unit (5) corresponding to the air outlet pipe (3) is provided on the top of the inner side of the secondary box; the monitoring unit (5) comprises a temperature sensor and an openable and closable sealing valve.
7. The waste heat recovery device for tempering furnace for production according to claim 1 is characterized in that: The air return unit comprises a primary air return pipe (71), a secondary air return pipe (73) and a circulation pump (72) connecting the primary air return pipe (71) and the secondary air return pipe (73); the primary air return pipe (71) is connected to the top of the secondary heat exchange box; the secondary air return pipe (73) is connected to the air inlet pipe (12).