CN214792687U

CN214792687U - Gas-gas tube type heat exchanger

Info

Publication number: CN214792687U
Application number: CN202023215477.1U
Authority: CN
Inventors: 姚伟; 钱荣忠; 黄斌; 吴昊; 朱国富
Original assignee: Nanjing Yire Zonglian Energy Saving Technology Co ltd
Current assignee: Nanjing Yire Zonglian Energy Saving Technology Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-11-19
Anticipated expiration: 2030-12-28

Abstract

The utility model discloses a gas-gas tube type heat exchanger, which comprises a housin, the high temperature flue gas import bottom fixedly connected with of casing goes up the tube sheet, tube sheet under the high temperature exhanst gas export top fixedly connected with of casing, goes up the fixed welding between tube sheet and the lower tube sheet and has the heat transfer fluorescent lamp that the multiunit interval set up, and the middle part of heat transfer fluorescent lamp is sinuous, and the top face pouring of going up the tube sheet has the pouring layer, and the top face of lower tube sheet is equipped with the inflation absorbed layer, goes up the bottom face fixedly connected with air channel pipe of tube sheet, and the inflation absorbed in situ is arranged in to the bottom of air channel pipe. The utility model discloses a dredging the theory of thermal energy, increasing thermal-insulated cotton, increasing the pouring layer at the top face of last tube sheet in high temperature flue gas import department, doing the bending at the middle part of heat transfer fluorescent tube and making its middle part be crooked form, the top face of tube sheet increases the inflation absorbed layer under, the position design that will probably take place thermal expansion is elastic construction, consequently just can solve tubular heat exchanger and appear the problem of drawing and splitting under high temperature.

Description

Gas-gas tube type heat exchanger

Technical Field

The utility model relates to a heat exchanger technical field, concretely relates to gas tubular heat exchanger.

Background

At present, the domestic environment protection situation is very severe, and a large amount of harmful combustible substances can be generated in the process of the industry, the direct discharge of the substances causes great harm to the environment and does not meet the requirement of environmental protection, therefore, the waste gas containing the substances is collected and then added with coal gas or natural gas to enter an incinerator for combustion, harmful substances are formed into harmless substances through chemical reaction and then discharged, the scheme is the mainstream scheme of waste gas treatment at present, the high temperature flue gas (about 800 ℃) after burning preheats (heats to 400-550 ℃) the unburned waste gas through the heat exchanger and then enters the incinerator, the method greatly reduces the consumption of coal gas or natural gas, or preheats a fresh air or heat conducting oil to the temperature required by the process, heats cold water for utilization and the like, the application methods are energy-saving, economical and environment-friendly, and the heat exchanger cannot be used for realizing the application methods.

At present, the gas-gas heat exchanger mainly comprises heat pipe type, pipe type and plate type heat exchangers, high-temperature flue gas (above 700 ℃) needs to be treated, and the heat exchangers have the following defects: the thermal expansion of the material causes the heat exchanger to often crack at high temperature.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a gas-gas tube heat exchanger has solved current heat exchanger because the thermal energy of material, often appears drawing the problem of splitting under the high temperature.

The technical scheme is as follows: the utility model relates to a gas-gas tube heat exchanger, which comprises a housin, the top of casing is equipped with high temperature flue gas inlet, and the bottom of casing is equipped with high temperature exhanst gas outlet, and the left end of casing is equipped with low temperature air outlet and low temperature air inlet from top to bottom respectively, the high temperature exhanst gas inlet bottom fixedly connected with of casing goes up the tube sheet, tube sheet under the high temperature exhanst gas outlet top fixedly connected with of casing, fixed welding has the heat transfer fluorescent lamp that the multiunit interval set up between last tube sheet and the lower tube sheet, the middle part of heat transfer fluorescent lamp is the sinuous form, the top face pouring of going up the tube sheet has the pouring bed, and the top face of lower tube sheet is equipped with the inflation absorbed layer, the bottom face fixedly connected with air channel pipe of going up the tube sheet, in the inflation absorbed layer is arranged in to the bottom of air channel pipe, the air channel pipe communicates with each other with low temperature air outlet and low temperature air inlet respectively.

Furthermore, the side walls around the high-temperature flue gas inlet of the shell are all provided with heat insulation cotton.

Furthermore, an expansion joint is arranged at a high-temperature flue gas outlet of the shell. The expansion joint absorbs the residual expansion amount of the heat exchange light pipe, and the tensile crack of the welding line is avoided.

Further, the expansion absorption layer is made of heat insulation cotton.

Furthermore, insulation boards are arranged around the inside of the shell.

Furthermore, one end of the heat exchange light pipe penetrates through the upper tube plate and the pouring layer to be communicated with the high-temperature flue gas inlet, and the other end of the heat exchange light pipe penetrates through the expansion absorption layer and the lower tube plate to be communicated with the high-temperature flue gas outlet.

Has the advantages that: the utility model discloses a dredging the theory of thermal energy, increasing thermal-insulated cotton, increasing the pouring layer at the top face of last tube sheet in high temperature flue gas import department, doing the bending at the middle part of heat transfer fluorescent tube and making its middle part be crooked form, the top face of tube sheet increases the inflation absorbed layer under, the position design that will probably take place thermal expansion is elastic construction, consequently just can solve tubular heat exchanger and appear the problem of drawing and splitting under high temperature.

Drawings

FIG. 1 is a front view of the present invention;

fig. 2 is a left side view of the present invention.

Detailed Description

The invention will be further described with reference to the following figures and examples:

as shown in fig. 1 and 2, the utility model relates to a gas-gas tube heat exchanger, including casing 1, the top of casing 1 is equipped with high temperature flue gas inlet 2, the high temperature flue gas inlet 2 of casing 1 side wall all around is equipped with thermal-insulated cotton 3, thermal-insulated cotton 3 isolates import high temperature flue gas, the bottom of casing 1 is equipped with high temperature flue gas outlet 4, the high temperature flue gas outlet 4 department of casing 1 is equipped with expansion joint 12, expansion joint 12 absorbs heat transfer fluorescent tube 9 residual expansion volume, avoid the welding seam to stretch out and split, the left end of casing 1 is equipped with low temperature air outlet 5 and low temperature air inlet 6 from top to bottom respectively, the inside of casing 1 all around is equipped with heated board 14;

the bottom end of a high-temperature flue gas inlet 2 of a shell 1 is fixedly connected with an upper tube plate 7, the top end of a high-temperature flue gas outlet 4 of the shell 1 is fixedly connected with a lower tube plate 8, a plurality of groups of heat exchange light tubes 9 arranged at intervals are fixedly welded between the upper tube plate 7 and the lower tube plate 8, a casting layer 10 is cast on the top end surface of the upper tube plate 7, the casting layer 10 can be made of cement, an expansion absorption layer 11 is arranged on the top end surface of the lower tube plate 8, the expansion absorption layer 11 is made of heat preservation cotton, one end of each heat exchange light tube 9 penetrates through the upper tube plate 7 and the casting layer 10 to be communicated with the high-temperature flue gas inlet 2, the other end of each heat exchange light tube 9 penetrates through the expansion absorption layer 11 and the lower tube plate 8 to be communicated with the high-temperature flue gas outlet 4, the middle part of each heat exchange light tube 9 is bent, and the heat exchange light tubes 9 have certain absorption effect on thermal expansion; the pouring layer 10 can well avoid thermal shock of high-temperature gas to the welding seam at the upper tube plate 7, solve the problem of weld cracking caused by thermal stress, and meanwhile, the heat exchange light tube 9 is fixed at the upper tube plate 7 so that all thermal expansion is carried out in one direction;

the bottom end face of the upper tube plate 7 is fixedly connected with an air channel tube 13, the air channel tube 13 is of a hollow structure, the heat exchange light tube 9 is positioned in the air channel tube 13, the bottom end of the air channel tube 13 is arranged in the expansion absorption layer 11, but the air channel tube 13 and the expansion absorption layer are not welded, and the air channel tube 13 is respectively communicated with the low-temperature air outlet 5 and the low-temperature air inlet 6; because the expansion absorption layer 11 is made of the heat insulation cotton, the heat insulation cotton can insulate heat, and the flexibility is good, so that the expansion of the air channel pipe 13 can be absorbed in the heat insulation cotton as much as possible;

the utility model discloses carry out certain improvement to current gas tubular heat exchanger, keep some of its original characteristics, adopt again and dredge the theory of thermal energy, 2 departments increase thermal-insulated cotton 3 in high temperature flue gas import, increase pouring layer 10 at the top face of last tube sheet 7, do crooked processing at the middle part of heat transfer fluorescent tube 9 and make its middle part be the bending, the top face of tube sheet 8 increases expansion absorbed layer 11 under, the position design that will probably take place the thermal energy is elastic construction, consequently just can solve tubular heat exchanger and appear the problem of drawing the fracture under high temperature.

Claims

1. The utility model provides a gas-gas tubular heat exchanger, includes the casing, the top of casing is equipped with high temperature flue gas inlet, and the bottom of casing is equipped with high temperature exhanst gas outlet, and the left end of casing is equipped with low temperature air outlet and low temperature air intlet, its characterized in that from top to bottom respectively: the heat exchange tube comprises a shell, and is characterized in that an upper tube plate is fixedly connected to the bottom end of a high-temperature flue gas inlet of the shell, a lower tube plate is fixedly connected to the top end of a high-temperature flue gas outlet of the shell, a plurality of groups of heat exchange light tubes arranged at intervals are fixedly welded between the upper tube plate and the lower tube plate, the middle parts of the heat exchange light tubes are bent, a pouring layer is poured on the top end face of the upper tube plate, an expansion absorption layer is arranged on the top end face of the lower tube plate, an air channel tube is fixedly connected to the bottom end face of the upper tube plate, the bottom end of the air channel tube is arranged in the expansion absorption layer, and the air channel tube is respectively communicated with a low-temperature air outlet and a low-temperature air inlet.

2. A gas-gas tube heat exchanger according to claim 1, wherein: the side walls around the high-temperature flue gas inlet of the shell are all provided with heat insulation cotton.

3. A gas-gas tube heat exchanger according to claim 1, wherein: and an expansion joint is arranged at a high-temperature flue gas outlet of the shell.

4. A gas-gas tube heat exchanger according to claim 1, wherein: the expansion absorption layer is made of heat insulation cotton.

5. A gas-gas tube heat exchanger according to claim 1, wherein: and heat insulation plates are arranged around the inside of the shell.

6. A gas-gas tube heat exchanger according to claim 1, wherein: one end of the heat exchange light pipe penetrates through the upper tube plate and the pouring layer to be communicated with the high-temperature flue gas inlet, and the other end of the heat exchange light pipe penetrates through the expansion absorption layer and the lower tube plate to be communicated with the high-temperature flue gas outlet.