CN102861450B - Reduced-pressure short-path distilling device and spontaneous combustion decoking method of heater of reduced-pressure short-path distilling device - Google Patents
Reduced-pressure short-path distilling device and spontaneous combustion decoking method of heater of reduced-pressure short-path distilling device Download PDFInfo
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- CN102861450B CN102861450B CN201210323001.0A CN201210323001A CN102861450B CN 102861450 B CN102861450 B CN 102861450B CN 201210323001 A CN201210323001 A CN 201210323001A CN 102861450 B CN102861450 B CN 102861450B
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Abstract
The invention relates to a distilling device, in particular to a reduced-pressure short-path distilling device and a spontaneous combustion decoking method of a heater of the reduced-pressure short-path distilling device. According to the reduced-pressure short-path distilling device, the heater is a double-channel heat exchanger arranged outside an evaporator, one channel of the double-channel heat exchanger is a feed liquid heating channel, a feed liquid heating channel entrance is communicated with a feed liquid discharge outlet of the evaporator by a heated feed liquid input pipeline and a feed liquid delivery pump, and a feed liquid heating channel exit is communicated with a high position feed liquid evaporating channel entrance of the evaporator by a heated feed liquid output pipeline. The other channel of the double-channel heat exchanger is a heat carrier heat releasing channel, and a heat carrier heat releasing channel entrance and a heat carrier heat releasing channel exit are communicated with a heat carrier circulation pipeline. By utilizing the reduced-pressure short-path distilling device and the spontaneous combustion decoking method, selective and sequential transient heating is provided for feed liquid with reduced pressure distillation to realize efficient evaporation by utilizing the double-channel heat exchanger, the degree of pyrolysis of distilled feed liquid is efficiently restrained, formation of coking materials in the evaporator can be also restrained, and harmless efficient removal of the coking materials of a heating releasing face can be realized through spontaneous combustion.
Description
Technical field
The present invention relates to for example distilling apparatus of waste lubricating oil of organic materials, particularly a kind of spontaneous combustion coke cleaning method of reduce pressure short course distillation device and heater thereof.
Background technology
Decompression distillation is a kind of distillating method of realizing the energy-conservation of reduction feed liquid boiling temperature and suppressing the pyrolysis of distillation feed liquid by reducing air pressure, be widely used at present, but the degree of inhibition distillation feed liquid pyrolysis and the coking material in inhibition heater coking and removing heater are the focuses of current order distillation those skilled in the art concern.
As shown in Figure 4, its operation principle is tradition decompression distillation device:
By feed liquid by pan feeding valve 22 and pan feeding pipeline 21 notes in evaporimeter 20, its injection rate accounts for 1/2nd left and right of evaporimeter 20 volumes, thus at the interior formation low level of evaporimeter 20 feed liquid liquid level 24.
Open vavuum pump 19, make distiller system realize vacuum decompression state, for reducing the boiling point of feed liquid, provide advantage.
Open feed liquid delivery pump 32, the heat absorption coil pipe that makes the feed liquid of low level feed liquid liquid level below 24 pass through tube furnace via feed liquid floss hole 30, the feed liquid of being heated intake pipeline 31 enters in high-order feed liquid evaporation channel 14 via the feed liquid export pipeline 12 that is heated, in the exit of high-order feed liquid evaporation channel 14, form high-order feed liquid evaporating surface 15, this liquid level is constantly carried under the prerequisite of feed liquid at feed liquid delivery pump 32, the feed liquid of high-order feed liquid evaporating surface below 15 constantly updated, and feed liquid constantly from inside to outside, trickling is disposed under the low level feed liquid liquid level 24 of evaporimeter 20 inside from top to bottom.
Light the fuel within tube furnace burning heat release chamber, to the feed liquid of circular flow in heat absorption coil pipe, carry out heat release.
Feed temperature after being heated constantly rises, when reaching the evaporating temperature of feed liquid under its vacuum pressure, Evaporation Phenomenon starts to occur, now in high-order feed liquid evaporating surface 15, constantly having the high temperature gas phase distillate being vaporized to depart from high-order feed liquid evaporating surface 15 constantly rises and enters in condenser 18 via distillate exhaust outlet 16, distillate gathering line 17, the feed liquid that can not be vaporized evaporation is from inside to outside, trickling is disposed under the low level feed liquid liquid level 24 of evaporimeter 20 inside from top to bottom, continues to accept that circulation is heated, circulating and evaporating.
Enter the high temperature gas phase distillate of condenser 18 under cooling effect, be liquefied as distillate 26 and enter in distillate collecting tank 27 via distillate gathering line 17, the waste gas of the liquefaction that can not be cooled is discharged into the external world via toxic emission pipeline 23 and vavuum pump 19.
Under the operating mode of continuous vaporization, the impurity in feed liquid and residue content will improve constantly, and when reaching expection standard, raffinate is discharged into the external world via residual liquid discharge mouth 28, residual liquid discharge valve 29.
The defect that decompression distillation device shown in Fig. 4 exists is:
With tube furnace, be that vacuum distillation apparatus is made heater 1, although can make feed liquid realize the instantaneous advantages such as preferential evaporation of being heated, with this, suppress to be distilled the degree of pyrolysis of feed liquid, but work as the heat absorption coil pipe of tube furnace within it under reduced pressure under the operating mode of mobile feed liquid heat release, the coil pipe inside that is very easy to make to absorb heat forms hard coking material because heat release causes feed liquid evaporation, once form hard coking material within heat absorption coil pipe, so with regard to current prior art, can only could solve this technical barrier by the heat absorption coil pipe more renewing, once fail to find in time if form hard coking material within heat absorption coil pipe, be very easy to so decline because coking causes the heat transfer property of heat absorption coil pipe, at short notice heat absorption coil pipe is burnt and causes pernicious security incident.
As shown in Figure 5, its operation principle is another traditional decompression distillation device:
By feed liquid by pan feeding valve 22 and pan feeding pipeline 21 notes in evaporimeter 20, its injection rate accounts for 1/2nd left and right of evaporimeter 20 volumes, thus at the interior formation low level of evaporimeter 20 feed liquid liquid level 24.
Open vavuum pump 19, make distiller system realize vacuum decompression state, for reducing the boiling point of feed liquid, provide advantage.
Open feed liquid delivery pump 32, the feed liquid of low level feed liquid liquid level below 24 entered in high-order feed liquid evaporation channel 14 via feed liquid floss hole 30, the feed liquid of being heated intake pipeline 31, in the exit of high-order feed liquid evaporation channel 14, form high-order feed liquid evaporating surface 15, this liquid level is constantly carried under the prerequisite of feed liquid at feed liquid delivery pump 32, the feed liquid of high-order feed liquid evaporating surface below 15 constantly updated, and feed liquid constantly from inside to outside, trickling is disposed under the low level feed liquid liquid level 24 of evaporimeter 20 inside from top to bottom.
Utilize high-temperature heat carrier to circulate in heat release coil pipe, for the feed liquid of the interior low level feed liquid of evaporimeter 20 liquid level below 24 carried out heat release.
Feed temperature after being heated constantly rises, when reaching the evaporating temperature of feed liquid under its vacuum pressure, Evaporation Phenomenon starts to occur, now in feed liquid liquid level, constantly having the high temperature gas phase distillate being vaporized to depart from feed liquid liquid level constantly rises and enters in condenser 18 via distillate exhaust outlet 16, distillate gathering line 17, the feed liquid that can not be vaporized evaporation in high-order feed liquid evaporation channel 14 is from inside to outside, trickling is disposed under the low level feed liquid liquid level 24 of evaporimeter 20 inside from top to bottom, continues to accept that circulation is heated, circulating and evaporating.
Enter the high temperature gas phase distillate of condenser 18 under cooling effect, be liquefied as distillate 26 and enter in distillate collecting tank 27 via distillate gathering line 17, the waste gas of the liquefaction that can not be cooled is discharged into the external world via toxic emission pipeline 23 and vavuum pump 19.
Under the operating mode of continuous vaporization, the impurity in feed liquid and residue content will improve constantly, and when reaching expection standard, raffinate is discharged into the external world via residual liquid discharge mouth 28, residual liquid discharge valve 29.
The defect that this decompression distillation device exists is as shown in Figure 5:
With heat release coil pipe, be that vacuum distillation apparatus is made heater 1, although can be by the artificial coking material of removing outside heat release coil pipe in evaporimeter 20, but the structure based on this device limits, feed liquid can not be carried out to appropriate, sequential heating and realize preferential evaporation, finally cause be distilled the degree of pyrolysis of feed liquid high, heat that energy consumption is high, inefficiency.
Summary of the invention
The object of the invention is to overcome the deficiency of background technology, and provide a kind of selective, have succession and realize decompression distillation and can realize the decompression short course distillation device of heater scarfing cinder and the spontaneous combustion coke cleaning method of heater thereof by coking material spontaneous combustion for the instantaneous heating of feed liquid.
The present invention solves its technical problem and adopts following technical scheme:
A kind of decompression short course distillation device, comprise evaporimeter, feeding mechanism, feed liquid heating arrangements, the cooling collection mechanism of decompressor of distillate, heater in described feed liquid heating arrangements is the double passage heat exchanger being arranged at outside evaporimeter, a passage in this double passage heat exchanger is feed liquid heated passage, its feed liquid heated passage entrance is communicated with the feed liquid floss hole of evaporimeter by be heated feed liquid intake pipeline and feed liquid delivery pump, and its feed liquid heated passage outlet is communicated with the high-order feed liquid evaporation channel entrance of evaporimeter by the feed liquid export pipeline that is heated; Another passage in this double passage heat exchanger is heat carrier heat release passage, and its import and export is communicated with heat carrier pipeloop.
Adopt the present invention of technique scheme compared with prior art, its outstanding effect is: utilize the feed liquid that Dual-channel type heat exchanger is decompression distillation to provide selectively, have the instantaneous heating of succession to realize high-efficiency evaporating, not only can efficiently suppress to be distilled the degree of pyrolysis of feed liquid, also can suppress the formation of coking material in evaporimeter, the coking material that can also cause feed liquid evaporation to form because of heat release heat delivery surface is realized innoxious high-efficient cleaning by self-burning and is removed.
As preferably, the present invention further technical scheme is:
Described double passage heat exchanger is a binary channels tubular heat exchanger.
On the outer cylinder body of described binary channels tubular heat exchanger, be provided with FlexbleJoint.
On the feed liquid intake pipeline that is heated between the feed liquid heated passage entrance of described heater and feed liquid delivery pump, check valve is installed.
On the feed liquid heated passage outlet of described heater and the feed liquid export pipeline that is heated between the high-order feed liquid evaporation channel entrance of evaporimeter, barostat is installed.
The reduce pressure spontaneous combustion coke cleaning method of heater of short course distillation device, carries out as follows:
A. the feed liquid discharge in the feed liquid heated passage of heater is clean, and feed liquid heated passage entrance and the outlet of feed liquid heated passage are in communication with the outside;
B. to passing into more than 100 ℃ the heat carrier heat release of flowing in heat carrier heat release passage, and more than the temperature to 200 of incremental rising heat carrier ℃, make the liquid phase component among coking material in feed liquid heated passage be evaporated release, when evaporation release is complete, the temperature of coking material will constantly rise, by spontaneous combustion or light and make it enter burning heat release state;
C. continue to pass into heat carrier in heat carrier heat release passage, by the lasting of heat carrier, flow, by coking material in feed liquid heated passage because of the absorption of flowing of the heat that discharges of burning, make heater now in reverse heat absorption state, heat carrier now not only no longer needs extraneous heating combined equipment for its heating, can also with hot equipment, carry out suitable heat release to other;
D. monitor heat carrier exhaust temperature and the thermal current exhaust temperature of heat carrier heat release channel outlet and the outlet of feed liquid heated passage, understand the heat release degree of its self-burning, control the air demand of feed liquid heated passage porch, the heat that coking material is discharged in spontaneous combustion process is further controlled in the combustion reference temperature that heater can bear.
The present invention who adopts technique scheme with compare with traditional processing method, have the following advantages:
1. by the state of coking material self-burning in heater is made to its mode turning to dust and ashes, and realize, its high-efficient cleaning is removed.
2. for not damage of device, technique is simple, and energy consumption is low.
As preferably, the present invention further technical scheme is:
The method of controlling air demand in described steps d is: in order dieseling to be maintained slowly and don't the relative low temperature heat release state extinguishing, gas supply regulation is originally stated to the minimum state needing to maintaining.
The method of controlling air demand in described steps d is: for heat that dieseling is discharged is carried and is discharged into the external world relatively to maximize air-flow, gas supply regulation is originally stated to the maximum rating needing to maintaining, at feed liquid heated passage entrance, be equipped with air blast.
Described feed liquid heated passage outlet is equipped with the thermal current conveyance conduit that connects boiler furnace and discharge thermal current to boiler furnace.
The method of lighting coking material in described step b is: with blowtorch, flame is sprayed on the coking material in feed liquid heated passage by feed liquid heated passage entrance.
It should be noted that:
1. heat carrier can be used the materials such as conduction oil or fused salt.
2. different by its ignition temperature of different medium coking material that feed liquid forms, the heater consisting of different materials is also different for the performance of withstand high temperatures, and so far the temperature in the spontaneous combustion coke cleaning method of above-mentioned heater cannot quantize by concrete numeral.
3. because of structure and the different sizes of heater, so far the air demand in the spontaneous combustion coke cleaning method of above-mentioned heater cannot quantize by concrete numeral.
4. this heater spontaneous combustion coke cleaning technique is not only limited to for the supporting heater of said apparatus, also can
For other, be applicable to the heater of this technique coke cleaning, every heater coke cleaning that this technique is limited for this technique all belongs within technical scheme of the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of vacuum distillation apparatus of the present invention.
Fig. 2 is the section structure schematic diagram of heater of the present invention.
Fig. 3 is the spontaneous combustion coke cleaning view of heater of the present invention.
Fig. 4 is a kind of traditional decompression distillation device structural representation.
Fig. 5 is another kind of traditional decompression distillation device structural representation.
The specific embodiment
Below by embodiment and accompanying drawing, further set forth the present invention, object is only to understand better content of the present invention.
Referring to Fig. 1, Fig. 2, Fig. 3, in figure: heater 1, FlexbleJoint 2, heat exchange core pipe 3, tube sheet 4, heat carrier heat release channel outlet 5, feed liquid heated passage outlet 6, heat carrier heat release passage 7, feed liquid heated passage 8, heat carrier heat release feeder connection 9, heater support 10, feed liquid heated passage entrance 11, the feed liquid of being heated export pipeline 12, barostat 13, high-order feed liquid evaporation channel 14, high-order feed liquid evaporating surface 15, distillate exhaust outlet 16, distillate gathering line 17, condenser 18, vavuum pump 19, evaporimeter 20, feed liquid intake pipeline 21, feed liquid input valve 22, toxic emission pipeline 23, low level feed liquid liquid level 24, evaporator support 25, distillate 26, distillate collecting tank 27, residual liquid discharge mouth 28, residual liquid discharge valve 29, feed liquid floss hole 30, the feed liquid of being heated intake pipeline 31, feed liquid delivery pump 32, check valve 33.
In the present embodiment, evaporimeter 20 is vertical tank containers, be placed on evaporator support 25, at its top, be provided with distillate exhaust outlet 16, in one end of its sidepiece, be provided with the downward feed liquid intake pipeline 21 of outlet, the other end at its sidepiece is provided with the high-order feed liquid evaporation channel 14 being formed by reducing tubulose body cavity body, in its bottom, is respectively arranged with residual liquid discharge mouth 28 and feed liquid floss hole 30, and liquid vent valves 29 is connected with the port of export of residual liquid discharge mouth 28.
High-order feed liquid evaporation channel 14 in the present embodiment is to be formed by the cavity of reducing tubular body, the osculum end of this reducing tubular body is import, be arranged at the outside of evaporimeter 20, the big opening end of this reducing tubular body is outlet, is arranged at the inner and upper central authorities of the evaporimeter 20 under distillate exhaust outlet 16.
The basic function of high-order feed liquid evaporation channel 14 is that it can form high-order feed liquid evaporating surface 15 between low level feed liquid liquid level 24 and feed liquid heated passage outlet 6, high-order feed liquid evaporation channel 14 is not only confined to said structure thus, and it also can complete above-mentioned basic function by other structure.
Feed liquid intake pipeline 21 and feed liquid input valve 22 form feeding mechanism, and feed liquid intake pipeline 21 passes through evaporimeter 20 sidewalls, and the port of export that is downward floss hole is arranged at the inside of evaporimeter 20, and the entrance point of feed liquid intake pipeline 21 is connected with feed liquid input valve 22.
Feed liquid heating arrangements is mainly comprised of the feed liquid intake pipeline 31 that is heated, feed liquid delivery pump 32, heater 1, the feed liquid of being heated export pipeline 12.
Heater 1 is one and is placed in and on heater support 10, is placed in the double passage heat exchanger outside evaporimeter 20, wherein a passage is heat carrier heat release passage 7, another passage is feed liquid heated passage 8, the below of heat carrier heat release passage 7 and top are respectively arranged with heat carrier heat release feeder connection 9 and the heat carrier heat release channel outlet 5 being communicated with heating, and the below of feed liquid heated passage 8 and top are respectively arranged with feed liquid heated passage entrance 11 and feed liquid heated passage outlet 6.
The import of the feed liquid of being heated intake pipeline 31 is communicated with feed liquid floss hole 30, the outlet of the feed liquid of being heated intake pipeline 31 is communicated with the feed liquid heated passage entrance 11 of heater 1, between the import of the feed liquid intake pipeline 31 that is heated and outlet, be provided with feed liquid delivery pump 32, the entrance point of the feed liquid of being heated export pipeline 12 is communicated with the feed liquid heated passage of heater 1 outlet 6, the port of export of the feed liquid of being heated export pipeline 12 is communicated with the import of high-order feed liquid evaporation channel 14, the circulation that forms the thus feed liquid route that is heated.
The cooling collection mechanism of decompressor of distillate is mainly by distillate gathering line 17, condenser 18, distillate collecting tank 27, toxic emission pipeline 23 and vavuum pump 19 form, one end of distillate gathering line 17 is communicated with distillate exhaust outlet 16, the other end passes through condenser 18 and is communicated with the import of distillate collecting tank 27, distillate collecting tank 27 is that a vertical tank container is placed on support, its upper end is provided with import and the outlet of inserting appropriate depth, its internal gathering has distillate 26, the import of vavuum pump 19 is communicated with the outlet of distillate collecting tank 27 by toxic emission pipeline 23.
The import of the feed liquid of being heated intake pipeline 31 is communicated with the feed liquid floss hole of feed liquid storage tank via feed valve, the outlet of the feed liquid of being heated intake pipeline 31 is communicated with the feed liquid heated passage entrance 11 of heater 1, between the import of the feed liquid intake pipeline 31 that is heated and outlet, be provided with feed liquid delivery pump 32, the entrance point of the feed liquid of being heated export pipeline 12 is communicated with the feed liquid heated passage of heater 1 outlet 6, the port of export of the feed liquid of being heated export pipeline 12 is communicated with the import of high-order feed liquid evaporation channel 14, feed liquid floss hole 30 is carried out to shutoff closes, residual liquid discharge valve 29 is communicated with raffinate collecting tank, what can form thus feed liquid is once subject to thermal evaporation route.
When the feed liquid heated passage 8 internal cause heat releases of heater 1 cause feed liquid evaporation and while forming coking material and in the time of need to removing, feed liquid heated passage entrance 11 and feed liquid heated passage outlet 6 need to be in communication with the outside.
As preferred version, double passage heat exchanger in the present embodiment is a binary channels tubular heat exchanger being placed in outside evaporimeter 20, it is by outer cylinder body, heat exchange core pipe 3, tube sheet 4, heat carrier heat release channel outlet 5, feed liquid heated passage outlet 6, heat carrier heat release passage 7, feed liquid heated passage 8, heat carrier heat release feeder connection 9, heater support 10, feed liquid heated passage entrance 11 forms, outer cylinder body is a vertical structure tank container, be arranged on heater support 10, the two ends of inner barrel are welded with respectively two tube sheets 4 outside, some radiator body core pipes 3 be angle arranged side by side pass through two tube sheets 4 and with its welding, inner barrel forms two autonomous channels outside thus, both the heat carrier heat release passage 7 having been formed by core pipe inside and the feed liquid heated passage 8 being formed by core pipe outside, below heat carrier heat release passage 7 and above be communicated with respectively heat carrier heat release feeder connection 9 and the heat carrier heat release channel outlet 5 being communicated with heating, below feed liquid heated passage 8 and above be communicated with respectively feed liquid heated passage entrance 11 and feed liquid heated passage outlet 6.
The above-mentioned binary channels tubular heat exchanger being placed in outside evaporimeter 20, can make heater 1 have under the prerequisite of larger heat exchange area in less space, and the simplification of implement device structure.
On the outer cylinder body of the tubular heat exchanger of binary channels described in the present embodiment, be provided with FlexbleJoint 2.FlexbleJoint 2 can efficient absorption heat exchange core pipe 3 and outer cylinder body between thermal stress.
Among feed liquid intake pipeline 31 between the delivery pump of feed liquid described in the present embodiment 32 and feed liquid heated passage entrance 11, check valve 33 is installed.Can make interior the holding for a long time of feed liquid heated passage 8 have feed liquid, the feed liquid passage internal cause of the static pressure inhibition heater 1 producing by feed liquid is heated and is caused feed liquid evaporation to form coking material.
Among the feed liquid export pipeline 12 that is heated between the heated passage of feed liquid described in the present embodiment entrance 11 and high-order feed liquid evaporation channel 14, barostat 13 is installed.Can make to hold in the feed liquid heated passage 8 in work the feed liquid that has under positive pressure environment, by changing air pressure environment, realize and suppress feed liquid and evaporate, by suppressing feed liquid, evaporate, realize the generation that suppresses coking material in feed liquid passage.
The operation principle of the present embodiment decompression short course distillation device is summarized as follows:
By feed liquid by pan feeding valve 22 and pan feeding pipeline 21 notes in evaporimeter 20, its injection rate accounts for 1/2nd left and right of evaporimeter 20 volumes.
Open vavuum pump 19, make distiller system realize vacuum decompression state, for reducing the boiling temperature of feed liquid, provide advantage.
Open feed liquid delivery pump 32, make feed liquid in evaporimeter 20 being heated and circulate and be heated in route with the diconnected circulation of heater 1, realize back and forth and evaporating.
Heater 1, the heat carrier heat release passage 7 that makes high-temperature heat carrier after being heated pass through from the bottom to top heater 1 carries out heat release to the feed liquid in feed liquid heated passage 8, heat carrier after heat release is discharged into continues to accept heating in extraneous heating, formed thus the circulation heat release route of heat carrier, heat carrier is along the continuous reciprocation cycle heat release of this route.
Feed liquid is under the operating mode that constantly circulation is heated, its temperature constantly rises, when reach under its vacuum pressure evaporating temperature time, Evaporation Phenomenon starts to occur, now in high-order feed liquid evaporation channel 14 exits, form high-order feed liquid evaporating surface 15, the feed liquid that flow to evaporimeter 20 inner chamber belows after evaporation has formed again low level feed liquid liquid level 24, now in the high-order feed liquid evaporating surface 15 under the distillate exhaust outlet 16 in evaporimeter 20, constantly there is the high temperature gas phase distillate being vaporized to depart from that high-order feed liquid evaporating surface 15 constantly rises and via distillate exhaust outlet 16, distillate gathering line 17 enters in condenser 18, under cooling effect, being liquefied as distillate 26 enters in distillate collecting tank 27 via distillate gathering line 17, the waste gas liquefying that can not be cooled is discharged into the external world via toxic emission pipeline 23 and vavuum pump 19.
In the process of continual evaporation, in order to maintain the expection liquid level scope of evaporimeter 20 interior feed liquids, new feed liquid slowly at the uniform velocity can be injected in the feed liquid in evaporimeter 20 via feed liquid input valve 22, feed liquid intake pipeline 21.
Under the operating mode of continuous vaporization, the impurity in feed liquid and residue content will improve constantly, and when reaching expection plan, raffinate is discharged in raffinate collecting tank via residual liquid discharge mouth 28, residual liquid discharge valve 29.
In the present invention, high-order feed liquid evaporating surface 15 is relative coexisting with low level feed liquid liquid level 24, high-order feed liquid evaporating surface 15 is by feed liquid delivery pump 32, feed liquid after being heated to be delivered to the feed liquid liquid level evaporating under distillate exhaust outlet 16, and the feed liquid liquid level that flow to its below after evaporation is low level feed liquid liquid level 24.
When feed liquid heated passage 8 internal causes of heater 1, be heated and cause feed liquid evaporation and when forming coking material and need to remove, need to the feed liquid in this passage all be discharged clean, the feed liquid heated passage entrance 11 of this passage and feed liquid heated passage outlet 6 are in communication with the outside, inflammable articles are around moved to the safety area in a distant place, by heat carrier mobile heat release in heat carrier heat release passage, and constantly carry out incremental intensification and regulate, the feed liquid that now coking material includes is discharged by preferential evaporation under the operating mode of heat carrier heat release, until be evaporated when discharging oil gas or smog and being reduced to a certain degree, heat carrier temperature can rise at a slow speed gradually.
When the interior formation coking material of feed liquid heated passage 8, most coking materials are attached on the heating surface of feed liquid heated passage 8, and heat carrier is now the thermal source of heat carrier heat release passage 7 heat delivery surfaces, forms heat-transfer surface thus between heating surface and heat delivery surface.
There are respectively the high-temperature heat carrier of continuous circulation heat release and the coking material of organic materials and appropriate oxygen in the two sides of heat-transfer surface, under this operating mode, the feed liquid that coking material includes is at high temperature preferentially evaporated release, after evaporation release phenomenon stops, the temperature of coking material will constantly rise to it more than ignition temperature under the operating mode of heat carrier heat release, now both can make coking material enter self-burning heat release state by surmounting the temperature of self-ignition point
Can also coking material be lighted and make coking material enter self-burning heat release state by human factor, appearance exothermic phenomenon with self-burning phenomenon also manifests simultaneously, under the effect of self-burning heat release, feed liquid heated passage 8 is interior will produce a large amount of thermal currents that constantly rise, this thermal current is discharged into the external world via feed liquid heated passage outlet 6, therefore at feed liquid heated passage entrance 11 places, certainly lead to negative pressure, outside air or oxygen are under the effect of negative pressure, via feed liquid heated passage entrance 11, enter in feed liquid heated passage 8, just for self-burning phenomenon provides oxygen, be the condition that provides sufficient of continuing of self-burning phenomenon thus.
In feed liquid passage, continuing under the operating mode of self-burning heat release, although coking material can be turned to dust and ashes, but its temperature is in continuous rising, for fear of each parts of heater 1 at its high temperature and impaired, guarantee the security of self-burning coke cleaning, must carry out innoxious self-burning coke cleaning by manual control, its concrete steps are as follows:
Feed liquid discharge in heater 1 feed liquid heated passage 8 totally and by feed liquid heated passage entrance 11 and feed liquid heated passage outlet 6 is in communication with the outside.
By heat carrier in the interior mobile heat release of heat carrier heat release passage 7, and constantly carry out incremental intensification and regulate, make the liquid phase component among the interior coking material of feed liquid heated passage 8 be evaporated release, when evaporation release is complete, in the situation that oxygen participates in, the temperature of coking material will constantly rise to it more than ignition temperature.Now both can make coking material enter self-burning heat release state by surmounting the temperature of self-ignition point, and also can utilize blowtorch that flame is sprayed on the coking material in feed liquid heated passage and coking material lighted and made coking material enter self-burning heat release state by feed liquid heated passage entrance.
By heat carrier, continue flowing in heat carrier heat release passage 7, by the interior coking material of feed liquid heated passage 8 because of the absorption of flowing of the heat that discharges of burning, make heater 1 now in reverse heat absorption state, heat carrier now not only no longer needs extraneous heating combined equipment for its heating, can also with hot equipment, carry out suitable heat release to other.
By the heat carrier exhaust temperature of monitoring heat carrier heat release channel outlet 5 and feed liquid heated passage outlet 6 and the heat release degree that thermal current exhaust temperature is understood its self-burning.
By the air demand at manual control feed liquid heated passage entrance 11 places, the heat that coking material is discharged in self-burning process is further controlled in the temperature range that heater 1 can bear.
One of method of controlling air demand is: in order self-burning phenomenon to be maintained slowly and don't the relative low temperature heat release state extinguishing, gas supply regulation is originally stated to the minimum state needing to maintaining.
Control air demand method two be: for heat that self-burning phenomenon is discharged is carried and is discharged into the external world relatively to maximize air-flow, gas supply regulation is originally stated to the maximum rating needing to maintaining, equipped air blast outside feed liquid passage end opening.
In order further to improve environmental protection level, the thermal current mixture that feed liquid heated passage outlet 6 is outwards discharged is introduced in the combustion chamber of boiler, and it is fully burnt.
The description of above-described embodiment is not all the restriction to the present invention program, any according to the present invention design, done only for pro forma but not substantial equivalent transformation all should be considered as technical scheme category of the present invention.
Claims (5)
1. the reduce pressure spontaneous combustion coke cleaning method of heater of short course distillation device, its step is as follows:
A. the feed liquid discharge in the feed liquid heated passage of heater is clean, and feed liquid heated passage entrance and the outlet of feed liquid heated passage are in communication with the outside;
B. to passing into more than 100 ℃ the heat carrier heat release of flowing in heat carrier heat release passage, and more than the temperature to 200 of incremental rising heat carrier ℃, make the liquid phase component among coking material in feed liquid heated passage be evaporated release, when evaporation release is complete, the temperature of coking material will constantly rise, by spontaneous combustion or light and make it enter burning heat release state;
C. continue to pass into heat carrier in heat carrier heat release passage, by the lasting of heat carrier, flow, by coking material in feed liquid heated passage because of the absorption of flowing of the heat that discharges of burning, make heater now in reverse heat absorption state, heat carrier now not only no longer needs extraneous heating combined equipment for its heating, can also with hot equipment, carry out suitable heat release to other;
D. monitor heat carrier exhaust temperature and the thermal current exhaust temperature of heat carrier heat release channel outlet and the outlet of feed liquid heated passage, understand the heat release degree of its self-burning, control the air demand of feed liquid heated passage porch, the heat that coking material is discharged in spontaneous combustion process is further controlled in the combustion reference temperature that heater can bear.
2. the spontaneous combustion coke cleaning method of heater of short course distillation device according to claim 1 reduces pressure, it is characterized in that: the method for controlling air demand in described steps d is: in order dieseling to be maintained slowly and don't the relative low temperature heat release state extinguishing, gas supply regulation is originally stated to the minimum state needing to maintaining.
3. the spontaneous combustion coke cleaning method of heater of short course distillation device according to claim 1 reduces pressure, it is characterized in that: the method for controlling air demand in described steps d is: for heat that dieseling is discharged is carried and is discharged into the external world relatively to maximize air-flow, gas supply regulation is originally stated to the maximum rating needing to maintaining, at feed liquid heated passage entrance, be equipped with air blast.
4. reduce pressure the according to claim 1 spontaneous combustion coke cleaning method of heater of short course distillation device, is characterized in that: described feed liquid heated passage outlet is equipped with and connects boiler furnace and to the thermal current conveyance conduit of boiler furnace discharge thermal current.
5. reduce pressure the according to claim 1 spontaneous combustion coke cleaning method of heater of short course distillation device, is characterized in that: the method for lighting coking material in described step b is: with blowtorch, flame is sprayed on the coking material in feed liquid heated passage by feed liquid heated passage entrance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210323001.0A CN102861450B (en) | 2012-09-04 | 2012-09-04 | Reduced-pressure short-path distilling device and spontaneous combustion decoking method of heater of reduced-pressure short-path distilling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210323001.0A CN102861450B (en) | 2012-09-04 | 2012-09-04 | Reduced-pressure short-path distilling device and spontaneous combustion decoking method of heater of reduced-pressure short-path distilling device |
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| Publication Number | Publication Date |
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| CN102861450A CN102861450A (en) | 2013-01-09 |
| CN102861450B true CN102861450B (en) | 2014-08-20 |
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| CN201210323001.0A Active CN102861450B (en) | 2012-09-04 | 2012-09-04 | Reduced-pressure short-path distilling device and spontaneous combustion decoking method of heater of reduced-pressure short-path distilling device |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1128185A (en) * | 1967-02-03 | 1968-09-25 | Gni I Pi Azotnoi Promy Iproduk | A unit for batchwise vacuum rectification of heat sensitive liquid mixtures under forced circulations |
| WO1991011238A1 (en) * | 1990-02-02 | 1991-08-08 | Sports Marine International Pty. Ltd. | Vacuum distillation using suction apparatus |
| US5980695A (en) * | 1996-11-14 | 1999-11-09 | Transglobal Industrial Services, Inc. | Apparatus for vacuum distillation of solvents |
| JP2005021745A (en) * | 2003-06-30 | 2005-01-27 | Rikogaku Shinkokai | Distillation apparatus and reaction device |
| CN201216884Y (en) * | 2008-06-26 | 2009-04-08 | 青岛光大装备科技有限公司 | Energy-conservation forced-air circulation liquid extract concentrating device |
| CN202762118U (en) * | 2012-09-04 | 2013-03-06 | 吴国存 | Pressure-reduction and short-range distillation apparatus |
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