CN218410771U

CN218410771U - High-efficient ripple shell and tube heat exchanger

Info

Publication number: CN218410771U
Application number: CN202222864374.0U
Authority: CN
Inventors: 张旭; 张华�; 赵雨玫
Original assignee: Hubei Zhongye Kiln & Furnace Co ltd
Current assignee: Hubei Zhongye Kiln & Furnace Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-01-31
Anticipated expiration: 2032-10-27

Abstract

The utility model discloses a high-efficiency corrugated tube type heat exchanger, which comprises a sealing shell, wherein the sealing shell is provided with a flue gas inlet, a flue gas outlet, an air conditioning inlet and a hot gas outlet; the smoke inlet is connected with a smoke exhaust pipe of the stepping heating furnace, the cold air inlet is connected with an air inlet pump, and the hot air outlet is connected with an air supply main pipe of the stepping heating furnace; an air inlet separation cavity, an air exhaust separation cavity, a smoke inlet through cavity, a smoke exhaust through cavity and a heat exchange region are arranged in the sealed shell; the air inlet separation cavity and the air exhaust separation cavity are both provided with sealing clapboards, and a plurality of corrugated heat exchange tubes are connected between the two sealing clapboards; the utility model discloses the high temperature flue gas is discharged into the heat exchanger through the pipe of discharging fume and is cooled off, and the cooling is discharged, and the heat exchanger is used for heating the cold air with absorbent heat energy, makes the air that gets into step-by-step heating furnace's air feed person in charge preheat earlier, when improving combustion heat efficiency, realizes the recycle of resource, avoids extravagant, saves the cost.

Description

High-efficient ripple shell and tube heat exchanger

Technical Field

The utility model relates to dissolve stove flue gas treatment field, concretely relates to high-efficient ripple shell and tube heat exchanger.

Background

In general, stainless steel tube solution furnaces are adopted in China for solution treatment in conventional roller hearth furnaces, and because some engine oil, lubricating oil and the like are adhered to the surfaces of stainless steel tubes, the steel tubes with the oil are placed on sticks and sent into the furnace through the sticks for heating and heat preservation. As the length of the steel pipe reaches 6 meters, after the head of the steel pipe is heated, the residual lubricating oil on the steel pipe is discharged from the tail part, and the workshop environment is severe.

The solid solution is carried out by adopting the stepping heating furnace, although the rapid feeding can be realized, the smoke can be prevented from being generated outside the furnace, the furnace temperature at the feeding position of the stepping furnace is about 600 ℃, the grease can not be fully combusted, and more harmful gases in the smoke can be directly discharged to cause environmental pollution, so that the oil smoke which is not completely combusted in the furnace needs to be fully combusted through a secondary combustion chamber, and the harmful gases in the smoke are reduced.

Although the emission of harmful gas is reduced in the secondary combustion, certain fuel needs to be consumed, and a large amount of heat energy is taken away by indirectly generated high-temperature flue gas, so that resource waste is caused.

Disclosure of Invention

The utility model aims at solving the problems in the prior art, and provides a high-efficiency corrugated tube type heat exchanger, which realizes the recycling of resources and solves the problem of resource waste while improving the combustion heat efficiency; the corrugated heat exchange tube has the advantages of easy cleaning, crack prevention and high heat exchange coefficient.

In order to achieve the above object, the utility model adopts the following technical scheme:

a high-efficiency corrugated tube type heat exchanger comprises a sealing shell, wherein the sealing shell is provided with a flue gas inlet, a flue gas outlet, a cold air inlet and a hot air outlet; the smoke inlet is connected with a smoke exhaust pipe of the stepping heating furnace, the cold air inlet is connected with an air inlet pump, and the hot air outlet is connected with an air supply main pipe of the stepping heating furnace; an air inlet separation cavity, an air exhaust separation cavity, a smoke inlet through cavity and a smoke exhaust through cavity are formed in the sealed shell, and a heat exchange area is defined among the air inlet separation cavity, the air exhaust separation cavity, the smoke inlet through cavity and the smoke exhaust through cavity; the gas inlet separation cavity and the gas exhaust separation cavity are provided with sealing partition plates, a plurality of corrugated heat exchange tubes are connected between the sealing partition plates, and the end portions of the corrugated heat exchange tubes penetrate through the sealing partition plates.

Furthermore, the cold air inlet is connected with the air inlet separation cavity, the hot air outlet is connected with the exhaust separation cavity, the smoke inlet is connected with the smoke inlet cavity, and the smoke outlet is connected with the smoke exhaust cavity.

Furthermore, the inside of the air inlet separation cavity is divided into a first separation cavity and a second separation cavity by a first partition plate, the inside of the air outlet separation cavity is divided into a third separation cavity and a fourth separation cavity by a second partition plate, the corrugated heat exchange tubes connected with the first separation cavity and the fourth separation cavity are not overlapped with each other, the first separation cavity is connected with the cold air inlet, and the fourth separation cavity is connected with the hot air outlet.

Further, the ratio of the number of the corrugated heat exchange tubes connected with the first separation cavity to the number of the corrugated heat exchange tubes connected with the second separation cavity is 1; the ratio of the number of the corrugated heat exchange tubes connected with the fourth separating cavity to the number of the corrugated heat exchange tubes connected with the third separating cavity is 1.

Furthermore, the smoke inlet through cavity is divided into a first through cavity and a second through cavity by a third partition plate, and the smoke exhaust through cavity is divided into a third through cavity and a fourth through cavity by a fourth partition plate; all the corrugated heat exchange tubes are connected with two corrugated clapboards in a penetrating mode, one of the corrugated clapboards is connected with the third clapboard, the other corrugated clapboard is connected with the fourth clapboard, the first through cavity is connected with the flue gas inlet, and the fourth through cavity is connected with the flue gas outlet.

Further, the two wave baffles trisect the heat exchange area.

Furthermore, the outer side of each corrugated heat exchange tube is sleeved with two soft sleeves, and the soft sleeves penetrate through the mounting holes of the corrugated partition plates and are fixed in an interference mode.

Compared with the prior art, the beneficial effects of the utility model are that:

1. high-temperature flue gas is discharged into the heat exchanger through the smoke discharge pipe for cooling and temperature reduction and discharge, the heat exchanger uses the absorbed heat energy for heating cold air, so that the air entering the air supply main pipe of the stepping heating furnace is preheated firstly, the combustion heat efficiency is improved, meanwhile, the resource recycling is realized, the waste is avoided, and the cost is saved;

2. the heat exchange tube is a corrugated heat exchange tube, so that high turbulence can be generated at low fluid flow rate, crystal nuclei of scale layers and accumulated scale substances are not easy to form on the tube wall, and the heat exchange tube has a self-cleaning effect through the effects of expansion with heat and contraction with cold, so that the heat exchange tube is not easy to scale;

3. the corrugated heat exchange tube is composed of a continuous corrugated structure, has a thin tube wall and a certain range of axial expansion capacity, can compensate and absorb deformation generated by temperature difference stress and pressure difference stress, protects the connection part of the heat exchange tube and the tube plate, and avoids leakage caused by tube orifice breakage, thereby improving the reliability of the product, and being safe and durable;

4. the corrugated heat exchange tube has the advantages that due to the design of wave crests and wave troughs, even under the condition of small flow speed, fluid can form strong disturbance inside and outside the tube, the contact area of cold and hot fluid is increased by the concave-convex structure of the corrugated tube, compared with the traditional tube heat exchanger, the heat exchange coefficient is improved by 30%, the length of the heat exchange tube can be shortened under the same heat exchange capacity, and the volume of the heat exchanger is reduced.

Drawings

Fig. 1 is a schematic structural view of a high-efficiency corrugated tube type heat exchanger of the present invention;

FIG. 2 is a schematic structural view of the corrugated heat exchange tube of the present invention;

FIG. 3 is a schematic view of the connection structure of the heat exchanger and the step-by-step heating furnace of the present invention;

in the figure: 1. a flue gas inlet; 2. a flue gas outlet; 3. a cold air inlet; 4. a hot gas outlet; 5. an air intake compartment; 6. an exhaust compartment; 7. a smoke inlet cavity; 8. a smoke exhaust through cavity; 9. sealing the partition plate; 10. a corrugated heat exchange tube; 11. a first partition plate; 12. a first compartment; 13. a second compartment; 14. a second partition plate; 15. a third compartment; 16. a fourth compartment; 17. a third separator; 18. a first through cavity; 19. a second through cavity; 20. a fourth separator; 21. a third through cavity; 22. a fourth through cavity; 23. a wave baffle; 24. and (4) soft sleeving.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "horizontal", "vertical", and the like indicate orientations or positional relationships that are all based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 3, a high-efficiency corrugated tube type heat exchanger comprises a sealed shell, wherein the sealed shell is provided with a flue gas inlet 1, a flue gas outlet 2, a cold air inlet 3 and a hot air outlet 4; the smoke inlet 1 is connected with a smoke exhaust pipe of the stepping heating furnace, the cold air inlet 3 is connected with an air inlet pump, and the hot air outlet 4 is connected with an air supply main pipe of the stepping furnace; an air inlet separation cavity 5, an air exhaust separation cavity 6, a smoke inlet through cavity 7 and a smoke exhaust through cavity 8 are arranged in the sealed shell, and a heat exchange area is defined among the air inlet separation cavity 5, the air exhaust separation cavity 6, the smoke inlet through cavity 7 and the smoke exhaust through cavity 8; the air inlet separation cavity 5 and the air exhaust separation cavity 6 are both provided with sealing clapboards 9, a plurality of corrugated heat exchange tubes 10 are connected between the two sealing clapboards 9, and the end parts of the corrugated heat exchange tubes 10 penetrate through the sealing clapboards 9; the cold air inlet 3 is connected with the air inlet separation cavity 5, the hot air outlet 4 is connected with the exhaust separation cavity 6, the smoke inlet 1 is connected with the smoke inlet cavity 7, and the smoke outlet 2 is connected with the smoke exhaust cavity 8.

When the stepping heating furnace is adopted for solid solution, the steel pipe generates high-temperature flue gas at the feed inlet of the stepping heating furnace when meeting heat, the high-temperature flue gas contains a large amount of heat energy, the flue gas is discharged into the heat exchanger through the smoke exhaust pipe for cooling and then is discharged, the heat exchanger uses the absorbed heat energy for heating cold air, so that the air entering the air supply main pipe of the stepping heating furnace is preheated firstly, and the combustion heat efficiency is improved.

Specifically, high-temperature flue gas enters the heat exchanger from the flue gas inlet 1, enters the heat exchange area through the air inlet separation chamber 5, releases heat after encountering the cooler corrugated heat exchange tube 10, and is discharged from the flue gas outlet 2 after the temperature is reduced.

The heat exchanger is gone into from air conditioning air inlet 3 pump with cold air to the pump that admits air, and cold air passes through in proper order and admits air and separates chamber 5 and reachs ripple heat exchange tube 10, discharges from hot gas discharge port 4 again after ripple heat exchange tube 10 absorbs heat, enters into the air feed and is responsible for, when providing the hot efficiency that improves burning, realizes the recycle of resource, avoids extravagant, saves the cost.

Preferably, the corrugated heat exchange tube 10 is a titanium alloy thin-walled tube with the thickness of 1.5 mm, is in a shape of a sugarcoated haw inside and outside, is formed by cold pressing a smooth straight tube, has stronger bearing pressure capacity than the smooth straight tube, and has a thin tube wall with small temperature gradient, thereby greatly reducing the thermal resistance of the tube wall; the titanium alloy thin-wall pipe has good corrosion resistance, a layer of uniform and compact oxide film is immediately formed on the titanium surface in the atmosphere, and the titanium alloy thin-wall pipe has the capability of resisting the corrosion of various mediums.

The corrugated heat exchange tube 10 of the scheme can generate high turbulence under the very low flow rate of fluid, so that crystal nuclei and accumulated scale substances on a scale layer are not easy to form on the tube wall, and meanwhile, the heat exchange tube has a self-cleaning effect through expansion with heat and contraction with cold, and the heat exchange tube is not easy to scale.

Because the corrugated heat exchange tube is composed of a continuous corrugated structure, the tube wall is thin, and meanwhile, austenitic stainless steel has good toughness, the corrugated heat exchange tube has a certain range of axial telescopic capacity, when the temperature difference between the inner fluid and the outer fluid of the heat exchange tube is large or the pressure difference between the inner working condition and the outer working condition is large, the heat exchange tube generates stress concentration to cause deformation of the heat exchange tube, and the corrugated heat exchange tube has a small range of telescopic capacity, can compensate and absorb the deformation generated by the temperature difference stress and the pressure difference stress under the condition, can effectively reduce the thermal stress, protects the connection part of the heat exchange tube and the tube plate, and cannot cause the heat exchanger to be damaged by breaking the connection structure. The leakage problem caused by the breakage of the pipe orifice is avoided, so that the reliability of the product is improved, and the safety and the durability are realized.

The corrugated heat exchange tube 10 of the scheme has the design of wave crests and wave troughs, so that when fluid flows, strong turbulence is formed due to continuous mutation of the inner and outer sections of the tube, even if the flow rate is very low, the fluid can form strong disturbance inside and outside the tube, compared with the traditional tube heat exchanger, the heat exchange coefficient is improved by 30%, the contact area of cold and hot fluids is increased by the concave-convex structure of the corrugated tube, the length of the heat exchange tube can be shortened under the same heat exchange capacity, and the volume of the heat exchanger is reduced.

The inside of the air inlet compartment 5 is divided into a first compartment 12 and a second compartment 13 by a first partition plate 11, the inside of the air outlet compartment 6 is divided into a third compartment 15 and a fourth compartment 16 by a second partition plate 14, corrugated heat exchange pipes 10 connected with the first compartment 12 and the fourth compartment 16 are not overlapped with each other, the first compartment 12 is connected with a cold air inlet 3, and the fourth compartment 16 is connected with a hot air outlet 4.

Cold air enters a first separating cavity 12 from a cold air inlet 3, then reaches a third separating cavity 15 after passing through a corrugated heat exchange tube 10 connected with the first separating cavity 12, then hits a second separating cavity 13 after passing through the corrugated heat exchange tube 10 connected with the third separating cavity 15, and then reaches a fourth separating cavity 16 after passing through the corrugated heat exchange tube 10 connected with the second separating cavity 13, so that the sequence is carried out, the flowing time of the cold air in the heat exchange tube is prolonged, and the heat exchange is more sufficient and uniform.

The ratio of the number of corrugated heat exchange tubes 10 connected to the first compartment 12 to the number of corrugated heat exchange tubes 10 connected to the second compartment 13 is 1; the ratio of the number of corrugated heat exchange tubes 10 connected to the fourth compartment 16 to the number of corrugated heat exchange tubes 10 connected to the third compartment 15 is 1. By setting the ratio of 1.

The smoke inlet through cavity 7 is divided into a first through cavity 18 and a second through cavity 19 by a third partition plate 17, and the smoke exhaust through cavity 8 is divided into a third through cavity 21 and a fourth through cavity 22 by a fourth partition plate 20; all the corrugated heat exchange tubes 10 are connected with two wave clapboards 23 in a penetrating way, wherein one wave clapboard 23 is connected with the third clapboard 17, and the other wave clapboard 23 is connected with the fourth clapboard 20; the first through cavity 18 is connected with the flue gas inlet 1, and the fourth through cavity 22 is connected with the flue gas outlet 2. The structure arrangement can prolong the flowing time of the flue gas in the heat exchanger, thereby ensuring that the heat exchange of the flue gas is more sufficient and uniform.

Further, two wave baffles 23 trisect the heat exchange area.

The outer side of each corrugated heat exchange tube 10 is sleeved with two soft sleeves 24, and the soft sleeves 24 penetrate through mounting holes of the corrugated partition plates 23 and are fixed in an interference mode. The soft sleeve 24 is used for facilitating the fixation of the wave baffle 23 and preventing the wave baffle 23 from shaking due to the influence of turbulence.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A high-efficiency corrugated tube type heat exchanger is characterized by comprising a sealed shell, wherein the sealed shell is provided with a flue gas inlet (1), a flue gas outlet (2), a cold air inlet (3) and a hot gas outlet (4); the smoke inlet (1) is connected with a smoke exhaust pipe of the stepping heating furnace, the cold air inlet (3) is connected with an air inlet pump, and the hot air outlet (4) is connected with an air supply main pipe of the stepping heating furnace;

a heat exchange area is enclosed among the air inlet separation cavity (5), the exhaust separation cavity (6), the smoke inlet through cavity (7) and the smoke exhaust through cavity (8); the air inlet separation cavity (5) and the air exhaust separation cavity (6) are respectively provided with a sealing partition plate (9), a plurality of corrugated heat exchange tubes (10) are connected between the two sealing partition plates (9), and the end parts of the corrugated heat exchange tubes (10) penetrate through the sealing partition plates (9);

air conditioning air inlet (3) are connected admit air and separate chamber (5), steam discharge port (4) are connected the exhaust separates chamber (6), flue gas air inlet (1) are connected advance cigarette and lead to chamber (7), flue gas discharge port (2) are connected it leads to chamber (8) to discharge fume.

2. A high efficiency corrugated shell and tube heat exchanger according to claim 1 wherein the inside of the inlet compartment (5) is divided by a first dividing wall (11) into a first compartment (12) and a second compartment (13), the inside of the outlet compartment (6) is divided by a second dividing wall (14) into a third compartment (15) and a fourth compartment (16), the corrugated heat exchange tubes (10) connecting the first compartment (12) and the fourth compartment (16) are not overlapped with each other, the first compartment (12) is connected to the cold gas inlet (3), and the fourth compartment (16) is connected to the hot gas outlet (4).

3. A high efficiency corrugated shell and tube heat exchanger according to claim 2 wherein the ratio of the number of corrugated heat exchange tubes (10) connected to said first compartment (12) to the number of corrugated heat exchange tubes (10) connected to said second compartment (13) is 1; the ratio of the number of the corrugated heat exchange tubes (10) connected to the fourth compartment (16) to the number of the corrugated heat exchange tubes (10) connected to the third compartment (15) is 1.

4. A high-efficiency corrugated tube type heat exchanger according to claim 1, wherein the smoke inlet through cavity (7) is divided into a first through cavity (18) and a second through cavity (19) by a third partition plate (17), and the smoke exhaust through cavity (8) is divided into a third through cavity (21) and a fourth through cavity (22) by a fourth partition plate (20); all corrugated heat exchange tubes (10) are connected with two wave clapboards (23) in a penetrating mode jointly, one of them wave clapboard (23) is connected third clapboard (17), another wave clapboard (23) is connected fourth clapboard (20), first logical chamber (18) is connected flue gas inlet (1), fourth leads to chamber (22) and connects flue gas discharge port (2).

5. A high efficiency corrugated shell and tube heat exchanger as claimed in claim 4 wherein two of said corrugated baffles (23) trisect said heat exchange area.

6. A high-efficiency corrugated tube type heat exchanger as claimed in claim 4, wherein two soft sleeves (24) are sleeved on the outer side of each corrugated heat exchange tube (10), and the soft sleeves (24) are fixedly installed in an interference manner through installation holes of the corrugated partition plates (23).