CN201764886U

CN201764886U - Carbon black smoke waste heat recovery system

Info

Publication number: CN201764886U
Application number: CN2010201583796U
Authority: CN
Inventors: 王进兴
Original assignee: Suzhou Baohua Carbon Black Co Ltd
Current assignee: Suzhou Baohua Carbon Black Co Ltd
Priority date: 2010-04-14
Filing date: 2010-04-14
Publication date: 2011-03-16
Anticipated expiration: 2020-04-14

Abstract

The utility model relates to a carbon black smoke waste heat recovery system. The carbon black smoke waste heat recovery system realizes recovery of the waste heat in the carbon black smoke through leading the carbon black smoke to pass through a heat exchanging system formed by a plurality of heat exchanging pipelines. The characteristics are as follows: at least one thermal resistance thin layer is coated onto the outer wall of the heat exchanging pipeline, so as to keep the temperature of the contact area of the inner wall surface of the thermal pipeline and the carbon black smoke above a certain value (such as 200 celsius degrees). Based on the small amplitude adjustment for the structure of an online boiler and the like of the existing carbon black smoke waste heat recovery device, the carbon black smoke waste heat recovery system effectively eliminate the phenomenon that the carbon black is sticky to the wall and hangs ash in the heat exchanging device, greatly increases the recovery efficiency of the carbon black smoke waste heat, effectively enhances the running stability of the carbon black production line, has low cost, and can bring significant economical benefits for the carbon black manufacturer. The carbon black smoke waste heat recovery system can be widely applied to the recovery process of other smoke waste heat, and can generate good social and economical benefits.

Description

The carbon black smoke residual neat recovering system

Technical field

The utility model relates to a kind of recycling equipment of industrial waste heat, is specifically related to a kind of carbon black smoke residual neat recovering system in carbon black manufacturing technology field.

Background technology

In manufacturing technologies of carbon black, by the carbon black smoke temperature of air preheater place output generally between 450 ℃～650 ℃, and the temperature upper limit that its follow-up bag hose that enters can bear is generally about 280 ℃, so, before carbon black smoke enters bag hose, usually need be to its processing of lowering the temperature.Traditional temperature reduction technology is mainly atomized water and sprays into the type of cooling, but this technology can increase water vapour content in the carbon black smoke usually, and the danger that has both caused follow-up equipment to be corroded also makes a large amount of resources be wasted.

For this reason, industry develops again and other kinds of processes, and wherein typical a kind of is to reclaim waste heat in the carbon black smoke with equipment such as online waste heat boilers.This technology also can make a large amount of heat energy in the carbon black smoke be recycled when making the carbon black smoke cooling, and reduces the degree of danger of follow-up equipment corrosion, meets economy, environmental protection requirement.The version of known online waste heat boiler is shown in Fig. 1～2 at present, it comprises the heat exchanger tube of being made by metal material with a shell 1 and complex root 2, heat exchanger tube 2 is arranged in the shell 1, and be communicated with the carbon black smoke conveyance conduit, on the shell 1 water is set and/or steam goes out, the inlet (not shown), during work, water or steam are by in water and/or the vapour inlet input shell 1, carbon black smoke is by heat exchanger tube 2 head ends inputs (flowing to A), and water or steam in the heating shell 1, then from the output of heat exchanger tube tail end, water after heating or steam are again by water and/or steam (vapor) outlet output.Yet; find in actual applications; above-mentioned online waste heat boiler is at the use initial stage; the condition of production meets its designed capacity substantially; but promptly can occur production capacity thereafter soon usually and sharply descend the degradation situation; its reason may be; the water in the input shell or the temperature of steam are generally about 130～190 ℃; the temperature that makes heat exchange pipe body 21 inner wall surface 211 and carbon black smoke contact area is below 220 ℃; be lower than the dewfall point (250 ℃) of carbon black smoke; make carbon black smoke on the heat exchanger tube inwall, form the sticking parietal layer 3 of carbon black that thickness increases gradually; and this carbon black glues the heat-insulating property (adiabatic coefficent 0.023) of parietal layer even is far superior to insulation fibre (adiabatic coefficent 0.09); this just causes carbon black smoke to carry out abundant heat exchange with water or the steam in the shell; promptly; waste heat in the carbon black smoke can not fully be reclaimed, worsened the working environment of rear portion equipment, the continuous production of carbon black is caused have a strong impact on.Though cause the cause of the problems referred to above revealed, up to now, industry does not develop effective method and address the above problem as yet.

The utility model content

The purpose of this utility model is to propose a kind of carbon black smoke residual neat recovering system, it can effectively alleviate or eliminate the scale formation of carbon black smoke on the heat exchanger tube inwall, promote the organic efficiency of carbon black smoke waste heat, strengthen the operation stability of production of carbon black line, thereby overcome deficiency of the prior art.

For achieving the above object, the utility model has adopted following technical scheme:

A kind of carbon black smoke waste heat reclaiming process, employing is with the mode of carbon black smoke by the heat-exchange system that mainly is made of the complex root heat exchange pipeline, realize the recycling of waste heat in the carbon black smoke, it is characterized in that, on the heat exchange pipeline outer wall, cover at least one thermal resistance thin layer, the temperature of heat exchange pipeline inwall and carbon black smoke contact area is remained between 200 ℃～400 ℃.

Particularly, described heat exchange pipeline comprises the heat exchange pipeline body, and described thermal resistance thin layer is arranged on the heat exchange pipeline body outer wall, and it contacts a side surface and contacts the temperature difference of a side surface with heat exchange pipeline body outer wall more than 20 ℃ with water or steam.

Described thermal resistance thin layer contacts a side surface and contacts the temperature difference of a side surface at 20～50 ℃ with heat exchange pipeline body outer wall with water or steam.

Described thermal resistance thin layer is made up of in polytetrafluoroethylene (PTFE), enamel material or the organic silicon coating one or more.

A kind of carbon black smoke residual neat recovering system, comprise the complex root heat exchange pipeline, it is characterized in that be covered with at least one thermal resistance thin layer on the described heat exchange pipeline outer wall, this thermal resistance thin layer can make the temperature of heat exchange pipeline inwall and carbon black smoke contact area remain between 250 ℃～300 ℃.

Say that further described heat exchange pipeline comprises the heat exchange pipeline body, described thermal resistance thin layer is arranged on the heat exchange pipeline body outer wall, and it contacts a side surface and contacts the temperature difference of a side surface with heat exchange pipeline body outer wall more than 20 ℃ with water or steam.

Described complex root heat exchange pipeline is parallel to be distributed in the closure casing, and each heat exchange pipeline two ends is communicated with the carbon black smoke conveying equipment respectively, and at least one water and/or steam inlet and at least one water and/or steam (vapor) outlet also are set on this housing.

At the defective that is applied to the existing online boiler in the carbon black manufacturing technology field, this case inventor is through studying for a long period of time and putting into practice, with the beyond thought method of a kind of those skilled in the art, promptly, employing is the artificial mode that increases by a thermal resistance thin layer on the heat exchange pipeline outer wall, the temperature of heat exchange pipeline inner body wall and carbon black smoke contact area is remained on more than 200 ℃, especially between 250 ℃～300 ℃, to delay or to prevent the formation of knot charcoal dirt in the heat exchange pipeline, and the heat exchange property of maintenance heat exchange pipeline, thereby promote the organic efficiency of carbon black smoke waste heat, strengthen the operation stability of production of carbon black line.

The thermal resistance thin layer adopts and has certain heat conductivility in the utility model, but heat transfer coefficient materials with smaller, make as resistant to elevated temperatures organic silicon coating material, polymeric material, ceramic composite or metal-nonmetallic composite etc., and so that the heat exchange tube wall temperature difference is good at 50～120 ℃.Postscript, the thickness of this thermal resistance thin layer can specifically be decided according to the heat conductivility of selected materials, but is prerequisite can bear 220～250 ℃ of temperature.

The utility model is only to existing carbon black smoke waste-heat recovery device, do on the basis of adjustment very by a small margin as the structure of online boiler etc., promptly effectively eliminate the sticking wall hanging ash of the carbon black of carbon black smoke in heat transmission equipment phenomenon, significantly promoted the organic efficiency of carbon black smoke waste heat, effectively strengthened the operation stability of production of carbon black line, not only with low cost, and can be carbon black manufacturing firm and bring remarkable economic efficiency.The utility model also can be widely used in the recovery processing technique of other fume afterheat, and produces good society and economic benefit.

Description of drawings

Below in conjunction with the drawings and the specific embodiments the utility model is further described.

Fig. 1 is the structural representation of a kind of online waste heat boiler in the prior art;

Fig. 2 is the cross-sectional view of heat exchanger tube after long-time use the among Fig. 1;

Fig. 3 is the structural representation of carbon black smoke residual neat recovering system in the utility model specific embodiment;

Fig. 4 is the cross-sectional view that is applied to a kind of heat exchanger tube in the carbon black smoke residual neat recovering system shown in Figure 3.

The specific embodiment

As shown in Figure 3, what present embodiment related to is a kind of online waste heat boiler that is installed on the production of carbon black line, and it is arranged between air preheater and the bag hose.This online waste heat boiler comprises that fire tube 2 that shell 1, complex root made by metal material (promptly, heat exchange pipeline), front smoke box 3 and back smoke box 4, shell 1 is arranged between front smoke box 3 and the back smoke box 4, fire tube 2 along continuous straight runs (certainly, if adopt vertical boiler, fire tube also can be vertical setting) parallel being distributed in the shell 1, and its two ends are communicated with the carbon black smoke feed-line, the top of shell 1 is provided with more than one steam inlet, and more than one steam (vapor) outlet also is set on the shell, and this steam inlet and steam inlet are communicated with the peripheral hardware steam conveying pipe.

As shown in Figure 4, above-mentioned fire tube 2 comprises the fire tube body, can cover an organic silicon coating material 7 on the fire tube body outer wall surface 21, this organic silicon coating material can make the fire tube inner body wall surface 22 regional temperature that contacts with carbon black smoke remain on more than 200 ℃, preferably, between 200～400 ℃, further preferred, between 250～300 ℃.

In the process of carrying out production of carbon black, temperature is about 540～630 ℃ carbon black smoke through front smoke box 3 input heat exchanger tubes 2, and through fire tube and the abundant heat exchange of steam of importing the temperature lower (as 150～190 ℃) in the shell 1 by the vapour inlet place, and after 4 outputs of back smoke box, the temperature of carbon black smoke is substantially about 380～400 ℃ at this moment, steam after heating is then by the output of the steam (vapor) outlet on the shell 1, for later use.

In above-mentioned heat transfer process,, make and to produce the bigger temperature difference (as 20～30 ℃, 50～60 ℃, perhaps bigger temperature range) between fire tube outer wall and the inwall because of of the existence of organic silicon coating material as the buffer zone.When passing to carbon black smoke in the fire tube, though the initial few a part of carbon black smoke that directly contacts with the fire tube inwall may be cooled to below 250 ℃ and dewfall, but fire tube inner wall surface place temperature can reach more than 250 ℃ rapidly thereafter, and maintain about this temperature since then or at this more than temperature, so can form the sticking wall hanging grieshoch of carbon black on the fire tube inwall hardly, or, only can form the sticking parietal layer of the carbon black as thin as a wafer that influences the fire tube heat exchange property hardly at most, and continuous service along with the production of carbon black line, the probability of carbon black smoke sticking wall hanging ash of carbon black continuation on the fire tube inwall is almost nil, so, can guarantee that not only online waste heat boiler can have the good heat exchange efficiency of continuing, and make the production of carbon black line have more stable runnability.

Above-mentioned thermal resistance thin layer also can be selected materials such as polymeric material, ceramic composite or metal-nonmetallic composite for use, and its thickness can specifically be decided according to the heat conductivility of selected materials, the type of production of carbon black line etc.

The utility model can be widely used in the recovery processing technique of flue gas class waste heat, and produces good society and economic benefit.

The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model spirit essence change or modify, and all should be encompassed within the protection domain of the present utility model.

Claims

1. carbon black smoke residual neat recovering system, comprise the complex root heat exchange pipeline, it is characterized in that, be covered with at least one temperature that makes heat exchange pipeline inwall and carbon black smoke contact area on the described heat exchange pipeline outer wall and remain on thermal resistance thin layer between 250 ℃～300 ℃.

2. carbon black smoke residual neat recovering system according to claim 1 is characterized in that described heat exchange pipeline comprises the heat exchange pipeline body, and described thermal resistance thin layer is arranged on the heat exchange pipeline body outer wall.

3. carbon black smoke residual neat recovering system according to claim 1 and 2 is characterized in that, described thermal resistance thin layer is any one in polytetrafluoroethylene (PTFE), enamel material and the organic silicon coating.

4. carbon black smoke residual neat recovering system according to claim 1, it is characterized in that, described complex root heat exchange pipeline is parallel to be distributed in the closure casing, each heat exchange pipeline two ends is communicated with the carbon black smoke conveying equipment respectively, and at least one water and/or steam inlet and at least one water and/or steam (vapor) outlet also are set on this housing.