CN110282859A - A kind of high effective flue gas cooler - Google Patents

Abstract

The invention discloses a kind of high effective flue gas coolers, including gas inlet, exhanst gas outlet, and it is set to the heat exchange module between gas inlet and exhanst gas outlet, heat exchange module includes that several rows are arranged by the pipe that the efficient pipe of high-ratio surface forms, the efficient pipe of high-ratio surface is axial vertical with flow of flue gas direction, air flowing, flue gas in high-ratio surface is efficiently managed flow in the space being made of tube sheet, side plate and the efficient tube outer surface of high-ratio surface.High effective flue gas cooler of the present invention uses modularization, standardized designs, production, and can carry out flexible assembling according to actual needs, shortens manufacture, the supply of material and set-up time, reduces cost.The efficient pipe heat exchange efficiency of high-ratio surface is high；Pipe row's vibrationproof performance is good, and flue gas flow field is uniform, is not easy dust stratification；Fume side imports and exports special cloth form of tubes, and tube bank uses different tube spacing, reduce different zones current difference away from.

Description

A kind of high effective flue gas cooler

Technical field

The present invention relates to a kind of high effective flue gas coolers, are mainly used in the production system of glass furnace.

Background technique

In traditional technology, the dust content of glass furnace is relatively high, and relatively high containing hardness such as silica Dust, higher containing alkali, adhesion is stronger, and deashing is not easy.

As the environmental requirement of country is higher and higher, it is more capable that original contaminating enterprises will re-start technology, whole energetically The serious enterprise of pollution treatment dyeing technique.The enterprise of glass furnace is the enterprise of a high pollution, the current exhaust gas temperature of glass furnace It is excessively high, without dedusting, denitration and desulfurization, in order to meet the environmental requirement of country, it is necessary to for the excessively high flue gas of exhaust gas temperature into Row dedusting, denitration and desulfurization process, however 600 DEG C are up to from the flue gas that glass furnace comes out, it is not able to satisfy dedusting, high temperature takes off Nitre and the requirement of the technique of desulfurization, it is therefore necessary to flue-gas temperature be reduced using high-performance heat exchanger.

Existing air preheater major part time uses light pipe or bellows as its heat exchange element at present, and passes through Its tube bank of flue gas transversal flow is to exchange heat.Since light pipe does not have enhanced heat exchange, the extremely low coefficient of heat transfer of heat exchange efficiency is generally 15~20W/ (㎡ DEG C), cause the weight and volume of air preheater increased dramatically.Bellows heat exchanger coefficient ratio light pipe is increased, There is certain strengthening effect, but effect is not obviously, to increase in ripple bring pipe with the resistance outside pipe instead, is easy to tie yet Dirt, seriously corroded.In order to solve regular air preheater or gas cooler heat exchange efficiency is low causes weight and volume huge, The problem of resistance is big, is easy fouling corrosion and leads to the more nervous field condition in original space, will introduce a kind of high efficient heat exchanging Pipe is the task of top priority of current gas-to-gas heat exchanger problem.

Patent of invention content

The purpose of the present invention is to provide a kind of high effective flue gas coolers, to solve glass furnace system limited installation space Problem solves resistance, mitigates abrasion and stifled ash, extends equipment life, and can reduce exhaust gas temperature, meets environmentally friendly upgrading Technique requirement, at the same avoid gas cooler because stifled ash, abrasion, heat exchange efficiency is low due to lead to Problem of Failure.

In order to achieve the above object, the invention proposes technical solutions below:

A kind of high effective flue gas cooler, including gas inlet, exhanst gas outlet, and at least one piece be set to gas inlet and cigarette Heat exchange module between gas outlet, heat exchange module include a cube of frame, are provided with several rows by Gao Bibiao in cube frame The pipe row of the efficient pipe composition in face, the efficient pipe of high-ratio surface is axial vertical with flow of flue gas direction, efficiently manages perpendicular to high-ratio surface Axial frame end face is provided with tube sheet, and frame top and bottom end are provided with side plate, and air flows in high-ratio surface is efficiently managed, Flue gas flows in the space being made of tube sheet, side plate and the efficient tube outer surface of high-ratio surface.

High-ratio surface is efficiently managed as helical structure.

Spacing between pipe row and pipe row is greater than the efficient pipe maximum outside diameter of high-ratio surface.

Spacing between the Guan Yuguan of pipe row is equal with the efficient pipe maximum outside diameter of high-ratio surface, passes through salient point between Guan Yuguan It contacts, by being welded and fixed between salient point, keeps pipe row's shape integral.

Each pipe is discharged from be respectively provided with wearing-resistant tile on the outside of the efficient pipe of the nearest high-ratio surface of smoke air inlet.

Along flow of flue gas direction, pipe row's density in frame is gradually increased.

The heat-transfer surface of low-level (stack-gas) economizer is solved using the efficient pipe of high-ratio surface as the heat exchange element of gas cooler The coefficient of heat transfer of gas cooler is small, saves the heat exchange area and space problem of heat exchanger.Using advanced piping mode, subtract Slight drag prevents the heat-transfer surface fouling of cooler and leads to dust stratification, realizes three-dimensional emptying design concept, makes flow field

It is " salient point " contact between the efficient pipe of high-ratio surface, does not need external support construction, spot welding forms one between pipe It is whole, improve section of jurisdiction rigidity, so that it is supported mutually between Guan Yuguan, it will not the flow velocity of extratubal fluid is very high Form heat exchanging bundle vibration impact.

When fluid flows in pipe or outside pipe, due to being influenced by helical structure special in high-ratio surface pipe, So that destroying thermal boundary layer, so that thermal boundary layer is thinning, the heat exchange of cold fluid and hot fluid is enhanced.And improve outflow in pipe Body heat transfer effective distance.Because the fluid of central part is substantially not engaged in heat exchange in the pipe of common round tube, Heat exchange efficiency is low.Exactly because three dimension high efficiency pipe shortens the heat transmission effective distance inside and outside pipe by optimization deformation, improve Heat transfer efficiency.

Since gas cooler import is temperature end, volume flow is very big, and the impact for exchanging heat pipe is very big, and abrasion adds Play, resistance increase, therefore increase circulation area, guidance using flexible " water conservancy diversion " formula stringing in the heat exchanger tube of input end arrangement Flue gas than smoothly, it is comfortable enter heat-exchanging tube bundle, reduce vortex and lead to drag losses, and tune up heat exchange tube spacing, reduce Flue gas flow rate is to zone of reasonableness.And the flue gas volume flow in gas cooler outlet end becomes smaller, it is appropriate to increase the close of heat exchanger tube Degree reduces circulation area, improves flue gas flow rate to zone of reasonableness.Pass through the inlet and outlet and intermediate tube bank of pipe gas cooler Using different piping modes, increase the gap of inlet and outlet circulation area, and then reduces current difference away from so that entirely changing The flow velocity of heat pipe bundle is in relatively uniform degree, optimizes flow field.

The tube bank of gas cooler is set using pipe arrangement, that is, tube bank is made of pipe row, the row between pipe row and pipe row Spacing is greater than the efficient pipe maximum outside diameter of high-ratio surface, it is therefore an objective to reduce and manage outer flow velocity, reduce the drag losses of tube bank.The pipe of pipe row Spacing between pipe is equal with the efficient pipe maximum outside diameter of high-ratio surface, that is, contacts with each other between Guan Yuguan, mutually supports, And the contact that connects between the pipe of pipe row, which uses, to be welded and fixed to form an entirety, it is therefore an objective to which the rigidity for increasing pipe row prevents cigarette Gas Cooler generates a possibility that vibration, reduces vortex and is formed, and reduces pipe external resistance loss, slows down heat exchange pipe abrasion, extends cigarette The service life of Gas Cooler.

Gas cooler uses modularization, standardized designs, production, and can carry out flexible group according to actual needs Dress shortens manufacture, the supply of material and set-up time, reduces cost.

The invention has the benefit that

First, heat exchange element heat exchange efficiency is high；

Second, vibrationproof performance is good, small in size；

Third, flue gas flow field is highly uniform, is not easy dust stratification；

4th, fume side imports and exports special cloth form of tubes, and tube bank uses different tube spacing, reduces tube bank different zones stream Speed difference away from.

Detailed description of the invention

Fig. 1 is high effective flue gas cooler construction schematic diagram of the present invention；

Fig. 2 is heat exchange module main view；

Fig. 3 is heat exchange module main view；

Fig. 4 is heat exchange module top view；

Fig. 5 is the partial enlarged view B that pipe is arranged in Fig. 4

Fig. 6 is the sectional view of pipe row；

Fig. 7 is the import stringing partial enlarged view A of Fig. 3；

Fig. 8 is the stringing figure of tube bank.

Description of symbols: 1, heat exchange module；2, frame；3, positioning pin；4, lifting lug；5, high-ratio surface is efficiently managed；6, side Plate；7, tube sheet；8, pad；9, wearing-resistant tile.

Specific embodiment

The contents of the present invention are described in further details with reference to the accompanying drawings and detailed description.

As shown in Figure 1, a kind of high effective flue gas cooler, it by upper and lower two heat exchange modules 1, horn-like gas inlet with Exhanst gas outlet composition, flue gas are walked high-ratio surface and efficiently manages outside, and air walks high-ratio surface efficiently in pipe.Between flue gas is arranged along pipe It is in cross-current heat exchange mode that gap, which is flowed with the air walked in pipe,.The heat exchange module of gas cooler can be freely combined, can be with Parallel combinations, can also be with tandem compound.

It as shown in figs 2-4, is the one of heat exchange module of gas cooler.Heat exchange module is by import frame 2, positioning pin 3, the efficient pipe 5 of lifting lug 4, high-ratio surface, side plate 6, tube sheet 7, etc. components composition, the shape of module be rule cube.Flue gas Import along module thickness direction enters, and flows along the gap between the heat exchanger tube row being made of efficient pipe 5.By pipe, row is formed And the flue gas circulation passage formed, which makes flow of flue gas smooth, reduces the drag losses of flow of flue gas, reduce simultaneously Abrasion of the flue gas of high dust-laden to efficient pipe 5.Since the channel dead angle of formation is fewer, the outside face relatively light of heat exchange element It is sliding, so dust stratification is also fewer.Heated medium --- air is flowed along the inside (in pipe) of high-ratio surface efficient 5, with cigarette Gas forms cross-current wall-type heat exchange.Tube sheet 7 and the efficient pipe 5 of high-ratio surface play sealing function, effectively prevent two kinds The mutual leakage of medium fluid, that is, prevent air from occurring toward fume side leakage crossfire phenomenon, it realizes and is absolutely sealed.And side Plate 6 is to prevent outdoor air to 2 fume side crossfire of module.Due to the efficient performance of heat exchange element heat exchange, so that the consumption of module Material amount greatly reduces, compact-sized, small in size.

As shown in Fig. 5-Fig. 6, it is the partial enlarged view of Fig. 2 pipe row.The high-ratio surface that it is described between pipe row is efficient Fixation between pipe 5, each section of efficient 5 vertical axial of pipe of every high-ratio surface have a maximum salient point, between heat exchanger tube Salient point can contact with each other, and to these contact salient point carry out spot welding connection, this tie point is exactly pad 8.It is logical Cross heat exchanger tube both ends connect with tube sheet 7 after, then using point electrode holder same plane on contact with each other heat exchanger tube connection be solidificated in Together, pipe row's component an of intensity maximum is formd, it is therefore prevented that vibration.

In addition, when channel of the flue gas between pipe row is flowed, there is also microchannel n between the Guan Yuguan of pipe row, It is formed between each pipe row and mutually mixes crossfire, further destroyed the boundary layer of extratubal fluid, realize the reinforcing of extratubal fluid Heat exchange is not easy dust stratification and at the same time making heat-exchanging tube bundle without vortex and dead angle.

As shown in fig. 7, the soil-pipe interaction partial enlarged view A at module inlet end, input end, which uses, reduces stringing number method, With flexible " water conservancy diversion " formula stringing, increase circulation area, guidance flue gas than smoothly, it is comfortable enter heat-exchanging tube bundle, reduce and be vortexed And lead to drag losses, and tune up heat exchange tube spacing, flue gas flow rate is reduced to zone of reasonableness.Vertical flow of flue gas direction first Wearing-resistant tile 9 is arranged in comb, and mitigation is hit and the maximum first row tube damage degree of abrasion loss.

As shown in figure 8, its volume flow constantly reduces, since flue gas is with continuous cooling in order to realize in module Flue gas flow reach unanimity, the heat exchanger tube density degrees of the different zones of module must be different.1 region, 2nd area in such as figure, The longitudinal pipe interval S in two regions is equal, and 1 >=δ of transverse direction tube spacing δ 2.So that 1st area of circulation area >=2nd area in two regions, Therefore flow velocity reaches unanimity, drag losses caused by reducing due to change in flow.

Above-listed detailed description is illustrating for possible embodiments of the present invention, and the embodiment is not to limit this hair Bright the scope of the patents, all equivalence enforcements or change without departing from carried out by the present invention, is intended to be limited solely by the scope of the patents of this case.

Claims (6)

1. a kind of high effective flue gas cooler, it is characterised in that: including gas inlet, exhanst gas outlet, and at least one piece is set to cigarette Heat exchange module between gas import and exhanst gas outlet, the heat exchange module include a cube of frame, are set in described cube of frame It is equipped with several rows to be arranged by the pipe that the efficient pipe of high-ratio surface forms, the efficient pipe of high-ratio surface is axial to hang down with flow of flue gas direction Directly, the frame end face perpendicular to the efficient pipe axial direction of high-ratio surface is provided with tube sheet, and frame top and bottom end are provided with side plate, air The flowing in the high-ratio surface is efficiently managed, flue gas are being made of the tube sheet, side plate and the efficient tube outer surface of high-ratio surface It is flowed in space.

2. high effective flue gas cooler according to claim 1, it is characterised in that: the high-ratio surface is efficiently managed as spiral shape Structure.

3. high effective flue gas cooler according to claim 1, it is characterised in that: the spacing between the pipe row and pipe row is big In the efficient pipe maximum outside diameter of high-ratio surface.

4. high effective flue gas cooler according to claim 1, it is characterised in that: the spacing between the Guan Yuguan of the pipe row It is equal with the efficient pipe maximum outside diameter of high-ratio surface, pass through bump contacts between Guan Yuguan, passes through between the salient point and be welded and fixed, Keep pipe row's shape integral.

5. high effective flue gas cooler according to claim 1, it is characterised in that: each pipe is discharged from the flue gas air inlet Wearing-resistant tile is respectively provided on the outside of the efficient pipe of the nearest high-ratio surface of mouth.

6. high effective flue gas cooler according to claim 1, it is characterised in that: in flow of flue gas direction, frame Pipe row's density is gradually increased.