CN201837271U - Heat exchanging device and exhaust gas purification system with same - Google Patents

Heat exchanging device and exhaust gas purification system with same Download PDF

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Publication number
CN201837271U
CN201837271U CN2010202206078U CN201020220607U CN201837271U CN 201837271 U CN201837271 U CN 201837271U CN 2010202206078 U CN2010202206078 U CN 2010202206078U CN 201020220607 U CN201020220607 U CN 201020220607U CN 201837271 U CN201837271 U CN 201837271U
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CN
China
Prior art keywords
heat
waste gas
drying room
exchange device
heat exchanger
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010202206078U
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Chinese (zh)
Inventor
李兵
荆文保
张辉言
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CHANGSHU KEDDY DECORATION MATERIAL Co Ltd
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CHANGSHU KEDDY DECORATION MATERIAL Co Ltd
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Priority to CN2010202206078U priority Critical patent/CN201837271U/en
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Publication of CN201837271U publication Critical patent/CN201837271U/en
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Abstract

The utility model discloses a heat exchanging device, which comprises a plurality of heat exchangers. The heat exchangers are communicated with each other, and a plurality of heat exchange pipes in rows are parallelly arranged to form the heat exchangers. The heat exchanging device is characterized in that each two adjacent heat exchangers are connected end to end by a communicating pipe, so that the integral heat exchanging device forms an 'S'-shaped heat exchanging channel, and the adjacent rows of heat exchange pipes are distributed in a mutually staggered manner. The heat exchanging device has the advantages of small size and high heat exchange efficiency. The utility model also provides an exhaust gas purification system with the heat exchanging device.

Description

A kind of heat-exchange device and have the waste gas cleaning system of this device
Technical field
The utility model relates generally to a kind of heat-exchange device, particularly, and by to heat exchanger and heat-exchange tube; The optimization of arrangement position distributes, and the maximized raising coefficient of heat transfer simultaneously, also relates to a kind of waste gas cleaning system with this heat-exchange device.
Background technology
In the coating bake process, generally all can produce the gas of combustible components, when imflammable gas runs into corresponding combustion-supporting medium, after simultaneously fuel gas reaches certain ratio, and under the incendiary source effect, can cause burning or blast, its harmfulness is mainly looked its explosion limit, and LEL numerical value is more little, the scope between LEL and the upper limit is big more, dangerous more; In addition, many fuel gas itself have toxicity.
At present, also have only a few enterprise, directly exhaust gases into outdoorly, do not make any purified treatment, the severe contamination surrounding enviroment.But most of enterprises adopt following exhaust gas purifying method usually:
1, flame combustion method, this kind purification method generally are used for handling waste gas and contain the lower situation of combustible component concentration, and it can directly burn in air.Because the concentration of combustible component is very low in the waste gas, institute's liberated heat is not enough to satisfy the required heat of combustion process in the combustion process.Therefore, waste gas itself can not act as a fuel, can only be as the combustion-supporting gas in the auxiliary fuel combustion process, and operation energy consumption is higher, is unfavorable for industrialization promotion.
2, Production by Catalytic Combustion Process, the advantage of Production by Catalytic Combustion Process is: the temperature of initial combustion that 1. can reduce organic exhaust gas.For example methyl alcohol, formaldehyde just take fire under the room temperature under the effect of Pt catalyst (Pt/Al2O3) that with the aluminium oxide is carrier, and directly firing method incipient combustion point is generally 300~600 ℃; 2. burning is not subjected to the restriction of hydrocarbon concentration; 3. can not cause secondary pollution basically; 4. equipment is simpler, small investment, instant effect.But there is corresponding inevitably defective too in Production by Catalytic Combustion Process: 1. catalyst is easily poisoned and non-refractory; 2. easily make the material of catalyst poisoning that compound of tar, oil smoke, dust, lead compound and sulphur, phosphorus, halogen etc. is arranged.
In order to remedy the shortcoming of flame combustion method and Production by Catalytic Combustion Process, prior art also discloses a kind of purification method of combustible waste gases, one side energy purifying exhaust air, on the other hand, can be recycling to energy consumption; As Chinese utility model patent CN200310109117, name is called " drying room purified treatment and energy recovery are utilized system and device ", disclosed the system and its apparatus that a kind of drying room waste gas and energy recovery are utilized, adopt the circulatory system, heat exchange, heating, catalytic combustion are placed one, comprising: the waste gas that (1) drying room is discharged enters heat exchanger and enters heat exchange and preheat after collecting; (2) pre-warmed waste gas enters the heating clamber heating; (3) enter the catalyst chamber catalytic combustion by the air-introduced machine extraction behind the waste gas filtering of heating back; (4) Purge gas after the burning enters drying room provides heat; Redundance gas enters heat exchanger and discharges after heat is provided for waste gas.Heat when waste gas is handled, can provide drying room required heated air in the utilization of device inner loop again; But this kind system is not optimized design to heat exchanger, so the volume of heat exchanger is bigger, directly influences the volume of cleaning system, and the heat exchange utilization rate is not high.
As seen, there is following defective at least in prior art, and the heat-exchange device volume is excessive, and heat exchanger effectiveness is not high.
The utility model content
The purpose of this utility model is to overcome above-mentioned shortcoming of the prior art, and a kind of heat-exchange device is provided, and has the advantage that volume is little, heat exchange efficiency is high.
A kind of heat-exchange device, this heat-exchange device is made up of the heat exchanger that several are interconnected, described heat exchanger is embarked on journey and is arranged in parallel by several heat-exchange tubes and forms, adjacent heat exchanger was end-to-end by communicating pipe, make whole heat-exchanger rig form " S " type heat exchanger channels, the heat exchanger tube distribution interlaced with each other of adjacent each row.
Preferentially, described heat-exchange tube is a bellows.
Another purpose of the present utility model is, a kind of waste gas cleaning system with this kind heat-exchange device is provided, and this system is in purifying exhaust air, can carry out recycling in internal system heat, and can reduce the volume of cleaning system, and improving heat exchange efficiency, this system comprises:
Drying room is used for product is carried out baking finish drying, and combustion gas;
Heat-exchange device is connected with drying room, and waste gas is carried out preheating;
Catalytic reaction chamber is connected with heat-exchange device, and this reative cell is provided with catalyst, and the waste gas after catalyst and the preheating reacts and generates Purge gas;
Mixing chamber, be arranged between catalytic reaction chamber and the drying room, cavity is arranged in the mixing chamber, cavity is provided with hot blast input port, cold wind input port, mixes delivery outlet, and wherein, the hot blast input port links to each other with catalytic reaction chamber, and wherein, the cold wind input port links to each other with drying room, and, mix delivery outlet with in the cold and hot mist input drying room;
First temperature control equipment links to each other with drying room, is used to monitor the drying room temperature;
The first air channel control device, be connected with first device for monitoring temperature, and be arranged between catalytic reaction chamber and the mixing chamber, this device is based on the signal of temperature control equipment feedback in the stove, whether the control hot blast advances mixing chamber, it is characterized in that, described heat-exchange device is made up of the heat exchanger that several are interconnected, described heat exchanger is embarked on journey and is arranged in parallel by several heat-exchange tubes and forms, it is characterized in that, adjacent heat exchanger was end-to-end by communicating pipe, made whole heat-exchanger rig form " S " type heat exchanger channels, the heat exchanger tube distribution interlaced with each other of adjacent each row.
Preferentially, described heat-exchange tube is a bellows.
Preferentially, the cleaning system that contains combustible components waste gas, also comprise second temperature control equipment, the second air channel control device, wherein, described second temperature control equipment is arranged in the air channel between mixing chamber and the catalytic reaction chamber, and wherein, the described second air channel control device links to each other with catalytic reaction chamber on the one hand, links to each other with space outerpace on the other hand.
Preferentially, described device for monitoring temperature comprises, thermocouple, the temp controlled meter that links to each other with thermocouple, the YE that links to each other with temp controlled meter, and wherein, described electric controller connects first, second air channel control device of control respectively.
Preferentially, described drying room is provided with 4 first temperature control equipments, and 4 first temperature control equipments evenly distribute along the drying room length direction.
Preferentially, described first temperature control equipment is connected with 4 first air channel control device.
Preferentially, the described cleaning system that contains combustible components waste gas has 4 mixing chambers, and 4 mixing chambers evenly distribute along the drying room length direction.
A kind of heat-exchange device that the utility model discloses, because heat-exchange device linked to each other the heat exchanger ending by communicating pipe, " S " type of formation heat exchanger channels, under unit volume, increased the heat exchange area of heat exchanger inner fluid greatly, and with the adjacent two heat-exchange tube cross arrangements of going, make the outer hot gas of heat-exchange tube can in heat exchanger, do the bounce-back motion, further improved the heat exchange coefficient of heat-exchange device; And the utility model discloses a kind of waste gas cleaning system with this heat-exchange device at heat-exchange device, and with respect to the waste gas cleaning system of prior art, it has the following advantages: 1, imflammable gas purifies the absorption efficiency height; 2, unnecessary heat can be recycling, reduced the consumption of the wide variety of conventional energy, and energy-saving effect is obvious, reduces enterprise's production cost; 3, compact conformation, volume dwindle greatly.
Description of drawings
Fig. 1 is the process principle figure of the waste gas cleaning system of the utility model preferred embodiment;
Fig. 2 is the preferential general assembly schematic diagram of the utility model waste gas cleaning system;
Fig. 3 is the vertical view of the heat-exchange device of the preferential embodiment of the utility model;
Fig. 4 is the profile of the heat-exchange device of the preferential embodiment of the utility model;
Fig. 5 is the heat exchange schematic diagram of the heat exchanger tube of the preferential embodiment of the utility model;
Among the figure, 100 is that drying room, 200 is that catalytic reaction chamber, 300 is that heat-exchange device, 310 is that heat exchanger, 320 is that air channel, 311 is heat-exchange tube, 400 mixing chambers.
The specific embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described in detail, thereby protection domain of the present utility model is made more explicit defining so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that.
As shown in Figure 1, be the process principle figure of waste gas cleaning system of the present utility model, in the utility model preferred embodiment, this utility model is primarily aimed at the coating baking of aluminium-plastic panel, therefore the main component of its waste gas that volatilizes is a dimethylbenzene, and dimethylbenzene belongs to a kind of of imflammable gas.Cleaning system among the utility model embodiment, at first dimethylbenzene is drawn from drying room 100 by blower fan, entering heat-exchange device 300 preheats, heat-exchange device 300 adopts coke to heat as raw material, so to adopting industrial coal to heat, do not heat such as industrial furnace or industrial diesel oil and adopt, its reason also is apparently, the cost of industrial coal has reduced operating cost much smaller than the heating of alternate manner to enterprise, calculates through the applicant, adopting coke to heat with industrial furnace compares, its operating cost can reduce by 65%~90%, and dimethylbenzene enters catalytic reaction chamber 200 after heat-exchange device 300 preheats to 400~500 ℃, this reative cell is provided with catalyst, in the utility model embodiment, the purification that is primarily aimed at dimethylbenzene waste gas absorbs, and correspondingly adopts γ-Al 2O 3As catalyst, its catalytic reaction equation is C 8H 10+ γ-Al 2O 3→ CO 2+ H 2O, reacted Purge gas temperature is higher, and greatly about more than 500 ℃, applicant's Purge gas that this temperature is higher is referred to as " hot blast ", and, because drying room 100 interior temperature are relatively low so the gas in the drying room is referred to as " cold wind ".Hot blast is drawn into mixing chamber 400 by blower fan, this mixing chamber 400 is provided with cavity, cavity is provided with the hot blast input port, the cold wind input port, mix delivery outlet, as its name suggests, what the hot blast input port sucked is the hot blast that catalytic reaction chamber is discharged, what the cold wind input port sucked is the interior cold wind of drying room, after hot blast and cold wind mix in mixing chamber, discharge by mixing delivery outlet, and enter drying room, because the hot blast temperature that catalytic reaction chamber 200 is discharged is more than 500 ℃, and the temperature in the drying room 100 is between 180~250 ℃, if hot blast directly enters in the drying room 100, because both temperature difference are bigger, make drying room 100 interior non-uniform temperature to cause the irregular colour of baking vanish product even, influence its quality, so the applicant is provided with mixing chamber 400 between catalytic reaction chamber and drying room, its purpose is, and is when preventing heat energy recycling, cold, the hot blast excessive temperature differentials causes the irregular colour of product even.In addition, in order to control the temperature in the drying room 100, therefore drying room 100 is provided with first temperature control equipment, this first temperature control equipment links to each other with one first air channel control device, the first air channel control device is actual to be a valve, in first temperature control equipment monitors drying room 100, during 180~250 ℃ of temperature, will send out code to valve, thereby make hot blast can not enter mixing chamber 400.In addition, in order to control the temperature in the air channel, the applicant also is provided with the second air channel control device between catalytic reaction chamber 200 and mixing chamber 400, this device also is a valve, valve is controlled by second temperature control equipment simultaneously, second temperature control equipment is mainly gathered the temperature information in the air channel between mixing chamber 400 and the drying room 100, when this place's temperature reaches 280~300 ℃, second temperature control equipment passes to the second air channel control device with signal, and it is opened, this valve one side links to each other with catalytic reaction chamber, link to each other with space outerpace on the other hand, therefore behind the valve open, hot gas can be discharged outside the system, thereby temperature is controlled within the zone of reasonableness in the assurance system.
Need to prove, in the utility model embodiment, the YE that first and second temperature control equipment includes thermocouple, the temp controlled meter that links to each other with thermocouple, links to each other with temp controlled meter, YE is controlled first, second air channel control device that is attached thereto respectively simultaneously.Because the technology of temperature control equipment control air channel control device belongs to the known technology of automatic field, and is not innovation part of the present utility model, so the applicant only does simple the description to it.
Please continue to consult Fig. 1 and in conjunction with Fig. 2, the preferential general assembly schematic diagram of Fig. 2 the utility model waste gas cleaning system, as preferential embodiment of the present utility model, the applicant is divided into 4 zones with drying room along its length direction, be respectively I district, II district, III district, IV district, wherein, the I district is used for the preheating to aluminium-plastic panel, II district, III district are used for being heating and curing of aluminium-plastic panel, and the IV district is used for the cooling of aluminium-plastic panel is handled.Correspondingly, each district is provided with 1 first temperature control equipment respectively, and each first temperature control equipment is controlled 1 first air channel control device respectively, and correspondingly, each district also is provided with 1 mixing chamber.In addition, I district temperature controlling range is at 150~180 ℃, II district temperature controlling range is at 180~240 ℃, III district temperature controlling range at 240~250 ℃, IV district temperature controlling range at 220~240 ℃, distinguish in the predefined value range when temperature reaches each, with each district accordingly first temperature control equipment will instruct the closure of respective valves.In addition, in order to improve the heat exchange efficiency of the hot and cold gas in the mixing chamber, each mixing chamber is equipped with blower fan.
Fig. 3 is the vertical view of the utility model heat-exchange device, as can be seen from the figure, heat-exchange device 300 is provided with several heat exchangers 310, each heat exchanger 310 is combined by several heat-exchange tubes 311, if with this figure is example, heat-exchange device 300 has 4 heat exchangers, but the quantity of heat exchanger 310 is not limited to preferential embodiment of the present utility model, a plurality of heat exchangers 310 can be set according to actual needs, heat exchanger 310 adopts S type structural arrangement, heat exchanger 310 ends are provided with the air channel of connection, because this heat-exchange device is by communicating pipe from beginning to end with adjacent heat-exchange tube, more particularly, by communicating pipe that heat-exchange tube is from beginning to end, thus gas in heat-exchange device 300 through out-of-date, also will become S type path flows, increase heat exchange area, thereby in unit volume, improved the heat exchanger effectiveness of gas greatly.Among the figure, the direction of arrow is the flow direction through the thermal current after the coke heating, and the waste gas in the drying room 100 flows in heat exchanger tube 311, and carries out heat exchange with thermal current.
Again in conjunction with shown in Figure 4, Fig. 4 is the profile of heat-exchange device 300, as can be seen from the figure, the distribution mode of the heat-exchange tube 311 of heat-exchange device 300, heat-exchange device is made up of a plurality of heat exchangers, heat exchanger is made up of some heat-exchange tubes of embarking on journey and being arranged in parallel again, heat-exchange tube 311 arrangements interlaced with each other of each row heat-exchange tube 311 and adjacent delegation, and further combined with shown in Figure 5, when thermal current flowed from left to right, at first the heat-exchange tube in the middle of the bump rebounded to both sides then, thermal current after the bounce-back can clash into the heat-exchange tube 311 of adjacent delegation again, thereby can further improve the heat exchange performance of system.
In addition, as a preferential embodiment of the present utility model, heat-exchange tube 311 adopts corrugated heat-exchange tube, because corrugated heat-exchange tube, because the concavo-convex profile of bellows surface, make fluid in pipe, form stronger turbulent flow, thereby improve the coefficient of heat transfer of pipe surfaces externally and internally greatly, make heat exchanger integral body heat exchange efficiency than 2~3 times of the raisings of shell and tube.Bellows has automatic detergency effect by expanding with heat and contract with cold, thereby less scaling, compensates the thermal stress that the temperature difference produces voluntarily.
The above; it only is the specific embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; any those of ordinary skill in the art are in the disclosed technical scope of the utility model; variation or the replacement that can expect without creative work all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claims were limited.

Claims (9)

1. heat-exchange device, this heat-exchange device is made up of the heat exchanger that several are interconnected, described heat exchanger is embarked on journey and is arranged in parallel by several heat-exchange tubes and forms, it is characterized in that, adjacent heat exchanger was end-to-end by communicating pipe, make whole heat-exchanger rig form " S " type heat exchanger channels, the heat exchanger tube distribution interlaced with each other of adjacent each row.
2. heat-exchange device according to claim 1 is characterized in that, described heat-exchange tube is a bellows.
3. waste gas cleaning system with heat-exchange device, this system comprises:
Drying room is used for product is carried out baking finish drying, and combustion gas;
Heat-exchange device is connected with drying room, and waste gas is carried out preheating;
Catalytic reaction chamber is connected with heat-exchange device, and this reative cell is provided with catalyst, and the waste gas after catalyst and the preheating reacts and generates Purge gas;
Mixing chamber, be arranged between catalytic reaction chamber and the drying room, cavity is arranged in the mixing chamber, cavity is provided with hot blast input port, cold wind input port, mixes delivery outlet, and wherein, the hot blast input port links to each other with catalytic reaction chamber, and wherein, the cold wind input port links to each other with drying room, and, mix delivery outlet with in the cold and hot mist input drying room;
First temperature control equipment links to each other with drying room, is used to monitor the drying room temperature;
The first air channel control device, be connected with first device for monitoring temperature, and be arranged between catalytic reaction chamber and the mixing chamber, this device is based on the signal of temperature control equipment feedback in the stove, whether the control hot blast advances mixing chamber, it is characterized in that, described heat-exchange device is made up of the heat exchanger that several are interconnected, described heat exchanger is embarked on journey and is arranged in parallel by several heat-exchange tubes and forms, it is characterized in that, adjacent heat exchanger was end-to-end by communicating pipe, made whole heat-exchanger rig form " S " type heat exchanger channels, the heat exchanger tube distribution interlaced with each other of adjacent each row.
4. the waste gas cleaning system with heat-exchange device according to claim 3 is characterized in that, described heat-exchange tube is a bellows.
5. according to claim 3 or 4 described waste gas cleaning systems with heat-exchange device, it is characterized in that, the cleaning system that contains combustible components waste gas, also comprise second temperature control equipment, the second air channel control device, wherein, described second temperature control equipment is arranged in the air channel between mixing chamber and the catalytic reaction chamber, and wherein, the described second air channel control device links to each other with catalytic reaction chamber on the one hand, links to each other with space outerpace on the other hand.
6. the waste gas cleaning system with heat-exchange device according to claim 5, it is characterized in that, described device for monitoring temperature comprises, thermocouple, the temp controlled meter that links to each other with thermocouple, the YE that links to each other with temp controlled meter, wherein, described electric controller connects first, second air channel control device of control respectively.
7. the waste gas cleaning system with heat-exchange device according to claim 6 is characterized in that, described drying room is provided with 4 first temperature control equipments, and 4 first temperature control equipments evenly distribute along the drying room length direction.
8. the waste gas cleaning system with heat-exchange device according to claim 6 is characterized in that, described first temperature control equipment is connected with 4 first air channel control device.
9. the waste gas cleaning system with heat-exchange device according to claim 8 is characterized in that, the described cleaning system that contains combustible components waste gas has 4 mixing chambers, and 4 mixing chambers evenly distribute along the drying room length direction.
CN2010202206078U 2010-06-09 2010-06-09 Heat exchanging device and exhaust gas purification system with same Expired - Fee Related CN201837271U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101871734A (en) * 2010-06-09 2010-10-27 常熟市凯迪装饰材料有限公司 Heat exchange device and waste gas purification system with same
CN106345785A (en) * 2016-11-02 2017-01-25 苏州市凯利勋实验室设备有限公司 Ventilation hood

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101871734A (en) * 2010-06-09 2010-10-27 常熟市凯迪装饰材料有限公司 Heat exchange device and waste gas purification system with same
CN106345785A (en) * 2016-11-02 2017-01-25 苏州市凯利勋实验室设备有限公司 Ventilation hood
CN106345785B (en) * 2016-11-02 2018-06-26 苏州市凯利勋实验室设备有限公司 Vent cabinet

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GR01 Patent grant
C17 Cessation of patent right
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Granted publication date: 20110518

Termination date: 20140609