CN107663460B - Low-rank coal drying and pyrolyzing integrated quality-improving treatment process equipment - Google Patents
Low-rank coal drying and pyrolyzing integrated quality-improving treatment process equipment Download PDFInfo
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- CN107663460B CN107663460B CN201710337780.2A CN201710337780A CN107663460B CN 107663460 B CN107663460 B CN 107663460B CN 201710337780 A CN201710337780 A CN 201710337780A CN 107663460 B CN107663460 B CN 107663460B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/28—Other processes
- C10B47/30—Other processes in rotary ovens or retorts
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
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Abstract
The invention relates to low-rank coal drying and pyrolyzing integrated quality-improving treatment process equipment which comprises a pyrolyzing device, a drying device, a circulating fan shunting device, a supporting and rotating device, an annular material guiding and air locking device, an annular material discharging and air locking device and a material discharging device, wherein the pyrolyzing device is arranged in the drying device, the circulating fan shunting device is arranged in the drying device, the supporting and rotating device is arranged at the bottom of the drying device and is opposite to the circulating fan shunting device, the annular material guiding and air locking device is arranged at one end of the drying device and communicated with the pyrolyzing device, the annular material discharging and air locking device is arranged at one end of the pyrolyzing device and is opposite to the annular material guiding and air locking device, and the material discharging device is arranged on the annular material discharging and air locking. The pyrolysis device and the drying device of the low-rank coal drying and pyrolysis integrated quality-improving treatment process equipment are combined into a whole, so that the process arrangement is simplified, and the process cost is reduced.
Description
Technical Field
The invention relates to the technical field of coal chemical engineering technical equipment, in particular to low-rank coal drying and pyrolysis integrated quality-improving treatment process equipment for quality-improving treatment of low-rank coal and clean combustion of power plant coal.
Background
The low-rank coal is coal with a relatively low coalification degree, mainly divided into lignite and subbituminous coal, has the characteristics of high volatile content, high activity, high moisture content and the like, so that the low-rank coal is inconvenient for long-distance transportation, and due to low calorific value, the low-rank coal is directly combusted, so that a large amount of energy is wasted, and harmful gases such as dust, sulfur oxides, nitrogen oxides, hydrocarbons, carbon monoxide and the like contained in combustion products are discharged into the atmosphere to cause serious atmospheric pollution. The current haze which endangers the stopping of the industry and the class forms a causal relationship with the direct combustion of low-rank coal. With the increasing demand for energy and the increasing demand for environmental protection, the quality improvement treatment of low-rank coal becomes social demand, and various coal pyrolysis technologies are developed rapidly. Pyrolysis refers to a series of physical changes and chemical reactions that occur when coal is continuously heated to a higher temperature under the condition of air isolation, and products such as tar, coal gas, semicoke and the like are finally obtained.
The method for industrially pyrolyzing the low-rank coal by the prior art mainly comprises the pyrolysis of a vertical carbonization furnace, and the technology requires that the raw coal has larger granularity and poor applicability; long output period, low processing capacity, low tar yield and low gas heat value.
The rotary pyrolysis furnace enters into experiments and pilot-scale tests recently, the moisture drying and the pyrolysis gas production of the low-rank coal are divided into two rotary furnaces, and the two rotary furnaces are externally heated to indirectly heat the low-rank coal, so that the heat efficiency is low, the temperature is difficult to rise, and a feed inlet is easy to coke and block. The transmission and support parts are all arranged on the high-temperature heating cylinder, the thermal deformation is large, the heat loss is large, thick heat insulation materials are generally required to be added, the process flow is long, and the pyrolysis waste heat cannot be effectively utilized.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide integrated quality-improving treatment process equipment for drying and pyrolyzing low-rank coal.
In order to solve the technical problems, the application discloses a low-rank coal drying and pyrolysis integrated quality-improving treatment process device, it is characterized by comprising a pyrolysis device, a drying device, a circulating fan flow dividing device, a supporting and rotating device, an annular material guiding and air locking device, an annular discharging and air locking device and a discharging device, the pyrolysis device is arranged in the drying device, the circulating fan shunting device is arranged in the drying device, the supporting and rotating device is arranged at the bottom of the drying device, and is opposite to the circulating fan shunting device, the annular material guiding and air locking device is arranged at one end of the drying device, communicated with the pyrolysis device, the annular discharging air locking device is arranged at one end of the pyrolysis device, and is opposite to the annular material guiding and air locking device, and the discharging device is arranged on the annular discharging and air locking device.
According to an embodiment of the application, above-mentioned pyrolysis device includes interior barrel, baffle, heat collection ring nest of tubes, a plurality of heat exchange tubes and pyrolysis shrouding, the baffle set up in the entrance point of interior barrel to a plurality of supporting holes have, heat collection ring nest of tubes card is located in the inner tube, and with the baffle is relative, and the both ends of each heat exchange tube are worn to locate and are corresponded supporting hole and heat collection ring nest of tubes, a plurality of heat exchange tubes and heat collection ring nest of tubes communicate each other, the pyrolysis shrouding set up in the exit end of interior barrel.
According to an embodiment of the present application, the heat collecting ring pipe set has a plurality of heat collecting ring pipes and a plurality of communicating pipes opposite to the plurality of supporting holes, each heat collecting ring pipe has a different diameter, axes of the plurality of heat collecting ring pipes are located on the same line and on the same vertical plane and are arranged in concentric circles, the plurality of heat collecting ring pipes are communicated with each other through a plurality of communicating pipes, and the plurality of communicating pipes are annularly arranged around an outer circumference of the heat collecting ring pipe located on the outermost side at intervals and are communicated with the outer circumference of the heat collecting ring pipe located on the outermost side.
According to an embodiment of the application, a plurality of pyrolysis feeding material scoops are arranged on the outer side wall of the inner cylinder at intervals, and the pyrolysis feeding material scoops are communicated with the inner cylinder; the inlet end of the inner cylinder is provided with a main heat supply pipeline which is communicated with a plurality of heat exchange tubes; an oil gas delivery pipe is arranged at the outlet end of the inner cylinder body and communicated with the inner cylinder body; the side wall of the inner cylinder body is provided with a plurality of pyrolysis material guiding blades, and the plurality of pyrolysis material guiding blades are axially inclined; the inner side wall of the inner cylinder body is coated with a heat insulation coating.
According to an embodiment of the application, the drying device comprises an outer cylinder, an annular grate plate and an annular sealing plate, wherein the outer cylinder is sleeved on the inner cylinder, the axis of the outer cylinder and the axis of the inner cylinder are positioned on the same line, a gap is formed between the inner side wall of the outer cylinder and the outer side wall of the inner cylinder, the inlet end of the inner cylinder is aligned with the air outlet end of the outer cylinder, and the annular grate plate is arranged at the air outlet end of the outer cylinder; the outlet end of the inner cylinder body protrudes from the feed end of the outer cylinder body, and the annular sealing plate is arranged at the feed end of the outer cylinder body; and a plurality of communicating pipes of the heat collecting ring pipe group penetrate through a plurality of air holes of the annular sealing plate and are communicated with the clearance of the outer cylinder body.
According to an embodiment of the present disclosure, the outer cylinder has a material guiding opening, a plurality of drying material guiding blades and a plurality of reverse helical blades are disposed on an inner side wall of the outer cylinder, the plurality of drying material guiding blades are located between a material feeding end of the outer cylinder and the material guiding opening, the plurality of reverse helical blades are located between the material guiding opening and an air outlet end of the outer cylinder, the plurality of drying material guiding blades and the plurality of reverse helical blades are axially inclined, and an inclination direction of the plurality of drying material guiding blades is opposite to an inclination direction of the plurality of reverse helical blades; and a plurality of pyrolysis feeding material scoops of the inner cylinder body are exposed out of the material guide port of the outer cylinder body.
According to an embodiment of the application, a tempering air chamber, a plurality of raw material scoops and a kiln air cover are annularly arranged on the outer side wall of the outer cylinder, the raw material scoops are arranged on the outer side wall of the outer cylinder at intervals, the kiln air cover is covered on the pyrolysis feeding material scoops, and the tempering air chamber and the raw material scoops are close to a feeding end and communicated with the outer cylinder; drying device still includes raw materials groove, raw materials groove set up in the below of outer barrel, set up in the lateral wall of outer barrel at least one of a plurality of raw materials spoon is located the raw materials inslot.
According to an embodiment of the application, above-mentioned circulating fan diverging device is including going out fan housing, circulating fan reposition of redundant personnel pipeline and dust pelletizing system connecting tube, it locates to go out the fan housing cover the air-out end and the main heat supply pipeline of outer barrel, circulating fan reposition of redundant personnel pipeline set up in drying device's the outside, and through the siphunculus with it is linked together to go out the fan housing, circulating fan reposition of redundant personnel pipeline more with the mediation plenum of outer barrel is connected, and with the mediation plenum is linked together, dust pelletizing system connecting tube connects circulating fan reposition of redundant personnel pipeline.
According to an embodiment of the present application, the annular material guiding and air locking device includes an annular material guiding pipeline, the annular material guiding pipeline surrounds the outer cylinder, two ends of the annular material guiding pipeline respectively penetrate through the material guiding opening to communicate with the outer cylinder, and the annular material guiding pipeline is communicated with the kiln hood; the annular discharging air locking device comprises an annular discharging pipeline, the annular discharging pipeline surrounds the inner cylinder body, and one end of the annular discharging pipeline is communicated with the inner cylinder body; the annular material guiding pipeline and the annular material discharging pipeline are formed by mutually assembling a plurality of three-way ring pipes, each three-way ring pipe is provided with at least two air locking valve ports, one direction of each air locking valve port is perpendicular to the axial direction of the outer cylinder body, an air locking ball is arranged in each air locking valve port, and a bypass sealing cover is arranged on each air locking valve port.
According to an embodiment of the application, above-mentioned discharging device includes ejection of compact cover, cooler and lock wind tripper, it locates to go out the fan cover the exit end of hoop ejection of compact lock wind device and interior barrel, the oil gas contact tube is followed ejection of compact cover is worn out, the cooler connect in the below of ejection of compact cover, and with ejection of compact cover intercommunication each other, lock wind tripper is connected the cooler, and with the cooler communicates each other, and has the slag notch.
Compared with the prior art, the application can obtain the following technical effects:
the pyrolysis device and the drying device of the low-rank coal drying and pyrolysis integrated quality-improving treatment process equipment are combined into a whole, so that the process arrangement is simplified, and the process cost is reduced. The utility model provides a low order coal is dried pyrolysis integration and is upgraded pyrolysis device of processing equipment and be located drying device, can omit originally should set up the heat preservation in pyrolysis device's inner tube body, and the produced waste heat of the lateral wall of the inner tube body through pyrolysis device in addition and the moisture of stoving raw materials, drying device's operating temperature is low, and the heat loss is little, and the thermal efficiency is high. The supporting and rotating device is uniformly contacted with the outer cylinder of the drying device, and has small thermal deformation, long service life and high rotating rate.
Drawings
FIG. 1 is a sectional view of a low-rank coal drying and pyrolysis integrated quality improvement treatment process equipment according to an embodiment of the application.
Fig. 2 is a cross-sectional view in the direction AA' of fig. 1.
Fig. 3 is a cross-sectional view in the direction BB' of fig. 1.
Fig. 4 is a cross-sectional view taken along direction CC' of fig. 1.
Fig. 5 is a sectional view in the direction DD' of fig. 1.
Fig. 6 is a sectional view taken along direction EE' of fig. 1.
Detailed Description
In the following description, numerous implementation details are set forth in order to provide a thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the application. That is, in some embodiments of the present application, such practical details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
The terms "first," "second," and the like, as used herein, do not denote any order or importance, nor do they denote any order or importance, but rather are used to distinguish one element from another.
Please refer to fig. 1, which is a sectional view of a low-rank coal drying and pyrolysis integrated quality-improving treatment process equipment 1 according to an embodiment of the present application; as shown in the drawings, the embodiment provides a low-rank coal drying and pyrolyzing integrated quality-improving treatment process device 1, which comprises a pyrolyzing device 10, a drying device 11, a circulating fan flow dividing device 12, a supporting and rotating device 13, an annular material guiding and air locking device 14, an annular material discharging and air locking device 15 and a material discharging device 16. The pyrolysis device 10 is arranged in the drying device 11, the circulating fan flow dividing device 12 is arranged in the drying device 11, the supporting and rotating device 13 is arranged at the bottom of the drying device 11, supports the drying device 11, drives the drying device 11 to rotate, and is opposite to the circulating fan flow dividing device 12. The annular material guiding and air locking device 14 is arranged at one end of the drying device 11 and communicated with the pyrolysis device 10, and the annular discharging and air locking device 15 is arranged at one end of the pyrolysis device 10 and opposite to the annular material guiding and air locking device 14. The discharging device 16 is arranged on the annular discharging air locking device 15.
Please refer to fig. 2 and fig. 3, which are a cross-sectional view along AA 'of fig. 1 and a cross-sectional view along BB' of fig. 1; as shown in the drawings, the pyrolysis apparatus 10 of the present embodiment includes a hollow inner cylinder 101, a partition plate 102, a heat collecting pipe loop set 103, a plurality of heat exchanging pipes 104, and a pyrolysis sealing plate 105, wherein the partition plate 102 is disposed at an inlet end 101a of the inner cylinder 101 and has a plurality of supporting holes 1021. The heat collecting ring pipe assembly 103 is clamped in the inner cylinder 101, is opposite to the partition plate 102, and has a plurality of heat collecting ring pipes 1031 opposite to the plurality of support holes 1021, the diameters of the heat collecting ring pipes 1031 are different, the axes of the heat collecting ring pipes 1031 are located on the same line and on the same vertical plane, that is, the heat collecting ring pipes 1031 are arranged in concentric circles. The plurality of collector rings 1031 are interconnected by a plurality of tubes 1032. Each heat exchange tube 104 is hollow, and both ends thereof penetrate through the corresponding support hole 1021 and the heat collecting ring tube 1031 of the heat collecting ring tube set 103, and the plurality of heat exchange tubes 104 are communicated with the plurality of heat collecting ring tubes 1031. The heat seal plate 105 is disposed at the outlet end 101b of the inner cylinder 101. In the present embodiment, the plurality of heat collecting rings 1031 are concentrically arranged, the plurality of support holes 1021 are concentrically arranged, and the cross sections of the plurality of heat exchange tubes 104 inserted into the plurality of support holes 1021 and the plurality of heat collecting rings 1031 are concentrically arranged. The lateral wall of interior barrel 101 is equipped with a plurality of pyrolysis feeding material spoons 1011 of interval arrangement, and a plurality of pyrolysis feeding material spoons 1011 are linked together with interior barrel 101. The heat collecting ring tube assembly 103 further comprises a plurality of communication tubes 1033, and the plurality of communication tubes 1033 are annularly arranged around the outer circumference of the heat collecting ring tube 1031 located at the outermost side at intervals, and are communicated with the outer circumference, and further are communicated with other heat collecting ring tubes 1031. The inlet end 101a of the inner cylinder 101 has a main heat supply duct 106, the main heat supply duct 106 communicating with the plurality of heat exchange tubes 104 to supply hot flue gas to the plurality of heat exchange tubes 104 through the main heat supply duct 106. The outlet end 101b of the inner cylinder 101 is provided with an oil gas delivery pipe 107, and the oil gas delivery pipe 107 is communicated with the inner cylinder 101. The side wall of the inner cylinder 101 is provided with a plurality of pyrolysis guide vanes 108, and the plurality of pyrolysis guide vanes 108 are axially inclined. The inner side wall of the inner cylinder 101 is further coated with a heat insulation coating for increasing heat resistance.
The drying device 11 includes an outer cylinder 111, an annular grate 112 and an annular seal plate 113, the outer cylinder 111 is sleeved on the inner cylinder 101, the axis of the outer cylinder 111 and the axis of the inner cylinder 101 are located on the same line, a gap 1111 with the same width is formed between the inner side wall of the outer cylinder 111 and the outer side wall of the inner cylinder 101, the inlet end 101a of the inner cylinder 101 aligns with the air outlet end 111a of the outer cylinder 111, and the annular grate 112 is arranged at the air outlet end 111a of the outer cylinder 111, namely, is clamped between the inner side wall of the air outlet end 111a of the outer cylinder 111 and the outer side wall of the inlet end 101a of the inner cylinder 101. The outlet end 101b of the inner cylinder 101 protrudes from the feed end 111b of the outer cylinder 111, the annular sealing plate 113 is disposed at the feed end 111b of the outer cylinder 111 and clamped between the inner sidewall of the feed end 111b of the outer cylinder 111 and the outer sidewall of the inner cylinder 101, the inner cylinder 101 is fixed to the outer cylinder 111 through the annular grate plate 112 and the annular sealing plate 113, and the gaps 1111 between the inner cylinder 101 and the outer cylinder 111 are the same. When the inner cylinder 101 is mounted to the outer cylinder 111, the plurality of communication pipes 1033 of the heat collecting ring pipe assembly 103 pass through the plurality of air holes 1131 of the ring-shaped sealing plate 113 and communicate with the gap 1111 of the outer cylinder 111.
The outer cylinder 111 has a material guiding opening 1112, the inner sidewall of the outer cylinder is provided with a plurality of drying material guiding blades 1113 and a plurality of reverse spiral blades 1114, the plurality of drying material guiding blades 1113 are positioned between the material inlet end 111b of the outer cylinder 111 and the material guiding opening 1112, the plurality of reverse spiral blades 1114 are positioned between the material guiding opening 1112 and the air outlet end 111a of the outer cylinder 111, the plurality of drying material guiding blades 1113 and the plurality of reverse spiral blades 1114 are axially inclined, and the inclination direction of the plurality of drying material guiding blades 1113 is opposite to the inclination direction of the plurality of reverse spiral blades 1114. When the inner cylinder 101 is mounted to the outer cylinder 111, the plurality of pyrolysis feed scoops 1011 of the inner cylinder 101 are exposed from the material guide port 1112 of the outer cylinder 111.
Please refer to FIG. 4, which is a cross-sectional view taken along line CC' of FIG. 1; as shown in the figure, a tempering air chamber 1115, a plurality of raw material scoops 1116 and a kiln hood 1117 are annularly arranged on the outer side wall of the outer cylinder 111, the raw material scoops 1116 are arranged on the outer side wall of the outer cylinder 111 at intervals, the kiln hood 1117 covers the pyrolysis feeding scoops 1011, and the tempering air chamber 1115 and the raw material scoops 1116 are close to the feeding end 111b and are communicated with the outer cylinder 111. The drying device 11 further includes a raw material tank 114, the raw material tank 114 is disposed below the outer cylinder 111, and at least one of the raw material scoops 1116 disposed on the outer sidewall of the outer cylinder 111 is located in the raw material tank 114.
The circulating fan flow dividing device 12 includes an air outlet cover 121 and a circulating fan flow dividing pipeline 122, the air outlet cover 121 is covered on the air outlet end 111a of the outer cylinder 111 and the main heat supply pipeline 106, and is respectively sealed with the outer cylinder 111 and the main heat supply pipeline 106 by a dynamic and static sealing method. The circulation fan bypass duct 122 is disposed outside the drying device 11 and communicated with the air outlet cover 121 through a through pipe, and the circulation fan bypass duct 122 is further connected to the air conditioning chamber 1115 of the outer cylinder 111 and communicated with the air conditioning chamber 1115.
The supporting rotation device 13 includes two supporting components 131 and a transmission component 132, the two supporting components 131 are disposed at the bottom of the outer cylinder 111 to support the outer cylinder 111; the transmission member 132 is disposed between the two supporting members 131 and connected to the outer cylinder 111. One of the two support members 131 is provided with a catch wheel.
Referring to fig. 5 and 6 together, a sectional view taken along direction DD 'of fig. 1 and a sectional view taken along direction EE' of fig. 1 are shown; as shown in the figure, the annular material guiding and air locking device 14 includes an annular material guiding pipeline 141, the annular material guiding pipeline 141 is formed by mutually assembling a plurality of three-way collars 1411, the annular material guiding pipeline 141 surrounds the outer cylinder 111, and two ends of the annular material guiding pipeline pass through the material guiding openings 1114 respectively to be communicated with the outer cylinder 111 and the kiln hood 1117. Each three-way ring pipe 1411 is provided with at least two air locking valve ports 1412, one direction of the at least two air locking valve ports 1412 is perpendicular to the axial direction of the outer cylinder 111, an air locking ball 1413 is arranged in each air locking valve port 1412, and a bypass sealing cover 1414 is arranged on each air locking valve port 1412 to seal each air locking valve port 1412 and prevent the air locking ball 1413 from falling off from the air locking valve port 1412. The annular discharging air locking device 15 comprises an annular discharging pipeline 151, an annular discharging pipeline 141 surrounds the inner cylinder 101, one end of the annular discharging air locking device is communicated with the inner cylinder 101, the structure of the annular discharging air locking device 15 is the same as that of the annular guiding air locking device 14, the annular discharging air locking device is formed by assembling a plurality of three-way ring pipes 1511, air locking balls 1513 are respectively arranged on a plurality of air locking valve ports 1512 of the annular discharging pipeline 151, and bypass sealing covers 1514 are arranged on the air locking valve ports 1512 provided with the air locking balls 1513.
The discharging device 16 comprises a discharging cover 161, a cooler 162 and an air locking discharger 163, the discharging cover 161 is covered on the annular discharging air locking device 14 and the outlet end 101b of the inner cylinder 101, the oil gas leading-out pipe 107 penetrates out of the discharging cover 161, and the oil gas leading-out pipe 107 and the discharging cover 161 are sealed in a dynamic and static sealing mode. The cooler 162 is connected to the lower side of the discharging cover 161 and is communicated with the discharging cover 161. The airlock discharger 163 is connected to the cooler 162, and communicates with the cooler 162, and has a slag outlet 1631.
When the low-rank coal drying and pyrolysis integrated quality improvement treatment process equipment 1 of the embodiment is used, the transmission component 132 of the supporting rotating device 13 drives the outer cylinder 111 of the drying device 11 to rotate, and each raw material spoon 1116 scoops the raw material positioned in the raw material groove 114 into the gap 1111 of the outer cylinder 111. Meanwhile, the main heat supply pipe 106 supplies hot flue gas to enter the plurality of heat exchange pipes 104, and the pyrolysis temperature of the hot flue gas generated by the plurality of heat exchange pipes 104 is between 500 ℃ and 600 ℃. The hot flue gas enters the heat collecting ring tube group 103 along a plurality of heat exchange tubes, and then enters the gap 1111 of the outer cylinder 111 along a plurality of communicating tubes 1033 through the heat collecting ring tube group 103. The hot flue gas flows from the inlet end 111b of the outer cylinder 111 to the outlet end 111a thereof, which can dry the moisture in the outer cylinder 111, and the remaining hot flue gas (with a temperature between 120 ℃ and 150 ℃) flows into the outlet hood 121 from the annular grate plate 112. Then, hot flue gas in the air hood 121 is extracted through the circulating fan bypass pipeline 122, the circulating fan bypass pipeline 122 generates and transmits conditioning air to the conditioning air chamber 1115, and the conditioning air chamber 1115 supplies the conditioning air to the gap 1111 of the outer cylinder 111 and conditions the conditioning air with the hot flue gas in the gap 1111 to obtain a conditioning hot air flow with the temperature between 300 ℃ and 350 ℃.
The tempered hot gas stream dries the material located in gap 1111, in other words, removes moisture from the material through the tempered heater stream. In addition, as the outer cylinder 111 rotates, the drying and guiding blades 1113 of the outer cylinder 111 continuously throw the raw material to move toward the air outlet end 111a of the outer cylinder 111. When the dried raw material moves to the air outlet end 111a of the outer cylinder 111, the dried raw material enters the kiln hood 1117 of the outer cylinder 111 through the annular material guiding pipeline 141 of the annular material guiding and air locking device 14. When the dried raw material that does not enter the annular material guiding and air locking device 14 moves between the material guiding opening 1112 and the air outlet end 111a of the outer cylinder 111, the plurality of reverse spiral blades 1114 throw off the dried raw material along with the rotation of the outer cylinder 111, and drive the dried raw material to move toward the material inlet end 111b of the outer cylinder 111, so that the dried raw material is forced to enter the annular material guiding and air locking device 14, and finally enters the kiln hood 1117 through the annular material guiding and air locking device 14.
The inner cylinder 101 is driven by the outer cylinder 111 to rotate, the plurality of pyrolysis feeding scoops 1011 draw dried raw materials in the kiln hood 1117, and the dried raw materials enter the inner cylinder 101 and are pyrolyzed by heat generated by the plurality of heat exchange tubes 104. Barrel 101 continuously rotates in along with writing, pyrolysis guide blade 108 in interior barrel 101 drives the raw materials that is pyrolyzed and moves towards the exit end 101b of interior barrel 101, the raw materials that is pyrolyzed at last get into annular ejection of compact airlock device 15, the raw materials that is pyrolyzed gets into ejection of compact cover 161 of discharging device 16, get into cooler 152 afterwards, the raw materials that is pyrolyzed are cooled to cooler 152, raw materials after the cooling get into airlock discharge valve 153, the raw materials after the cooling is discharged from slag notch 1631 of airlock discharge valve 153 at last. In addition, oil gas in the pyrolysis process is led out to an oil gas condensation separation system through an oil gas leading-out pipe 107 to be treated.
The pyrolysis material guiding blades 108, the drying material guiding blades 1113, and the reverse spiral blades 1114 of the present embodiment are inclined with respect to the axial direction, so that the inner cylinder 101 and the outer cylinder 111 rotate to drive the raw material to move axially. The inclination directions of the drying material guiding blades 1113 and the reverse spiral blades 1114 are different, and the displacement directions of the raw materials driven by the drying material guiding blades 1113 and the reverse spiral blades 1114 are opposite.
The annular material guiding and air locking device 14 and the annular material discharging and air locking device 15 of the embodiment achieve the air locking and guiding effects, the pyrolysis process is carried out under the oxygen-free and oxygen-deficient conditions, and the pyrolysis yield is improved. The number of the air locking balls 1413 of the annular material guiding and air locking device 14 and the number of the air locking balls 1513 of the annular material discharging and air locking device 15 should be such that the annular material guiding and air locking device 14 and the annular material discharging and air locking device 15 rotate to any position along with the outer cylinder 111 and the inner cylinder 101, and the air locking balls 1413 of the annular material guiding and air locking device 14 and the air locking balls 1513 of the annular material discharging and air locking device 15 can respectively press the air locking valve port 1412 of the annular material guiding and air locking device 14 and the air locking valve port 1512 of the annular material discharging and air locking device 15. The bypass sealing cover 1414 of the annular material guiding and air locking device 14 and the bypass sealing cover 1514 of the annular discharging and air locking device 15 are respectively used for transitionally bearing the air locking ball 1413 of the annular material guiding and air locking device 14 and the air locking ball 1513 of the annular discharging and air locking device 15 in the rotating process, the annular material guiding pipeline 141 of the annular material guiding and air locking device 14 and the annular discharging pipeline 151 of the annular discharging and air locking device 15 are unblocked, and in addition, the air locking ball 1413 of the annular material guiding and air locking device 14 and the air locking ball 1513 of the annular discharging and air locking device 15 are easily assembled and disassembled during installation and maintenance.
The circulation fan bypass device 12 of the present embodiment further includes a dust removal system connection pipe 123 and an auxiliary heating pipe 124, the dust removal system connection pipe 123 is connected to the circulation fan bypass pipe 122, and the auxiliary heating pipe 124 is disposed between the circulation fan bypass pipe 122 and the air-conditioning chamber 1115 to adjust the temperature of the air-conditioning flow generated by the circulation fan bypass pipe 122.
In summary, in one or more embodiments of the present application, the pyrolysis device and the drying device of the low-rank coal drying and pyrolysis integrated upgrading treatment process equipment are combined into a whole, so that the process arrangement is simplified, and the process cost is reduced. The utility model provides a low order coal is dried pyrolysis integration and is upgraded pyrolysis device of processing equipment and be located drying device, can omit originally should set up the heat preservation in pyrolysis device's inner tube body, and the produced waste heat of the lateral wall of the inner tube body through pyrolysis device in addition and the moisture of stoving raw materials, drying device's operating temperature is low, and the heat loss is little, and the thermal efficiency is high. The supporting and rotating device is uniformly contacted with the outer cylinder of the drying device, and has small thermal deformation, long service life and high rotating rate.
The above description is only an embodiment of the present application, and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (9)
1. The low-rank coal drying and pyrolyzing integrated quality improvement treatment process equipment is characterized by comprising a pyrolyzing device, a drying device, a circulating fan shunting device, a supporting rotating device, an annular material guiding and air locking device, an annular material discharging and air locking device and a material discharging device, wherein the pyrolyzing device is arranged in the drying device, the circulating fan shunting device is arranged in the drying device, the supporting rotating device is arranged at the bottom of the drying device and is opposite to the circulating fan shunting device, the annular material guiding and air locking device is arranged at one end of the drying device and is communicated with the pyrolyzing device, the annular material discharging and air locking device is arranged at one end of the pyrolyzing device and is opposite to the annular material guiding and air locking device, and the material discharging device is arranged on the annular material discharging and air locking device; the annular material guiding and air locking device comprises an annular material guiding pipeline, the annular material guiding pipeline surrounds the outer cylinder of the drying device, two ends of the annular material guiding pipeline penetrate through the material guiding openings respectively and are communicated with the outer cylinder, and the annular material guiding pipeline is communicated with the kiln hood on the outer cylinder; the annular discharging air locking device comprises an annular discharging pipeline, the annular discharging pipeline surrounds the inner cylinder body of the pyrolysis device, and one end of the annular discharging pipeline is communicated with the inner cylinder body; the annular material guiding pipeline and the annular material discharging pipeline are formed by mutually assembling a plurality of three-way ring pipes, each three-way ring pipe is provided with at least two air locking valve ports, one direction of each air locking valve port is perpendicular to the axial direction of the outer cylinder body, an air locking ball is arranged in each air locking valve port, and a bypass sealing cover is arranged on each air locking valve port.
2. The low-rank coal drying and pyrolyzing integrated quality-improving treatment process equipment according to claim 1, wherein the pyrolyzing device comprises the inner cylinder, a partition plate, a heat collecting ring pipe set, a plurality of heat exchange pipes and a pyrolyzing sealing plate, the partition plate is arranged at the inlet end of the inner cylinder and is provided with a plurality of supporting holes, the heat collecting ring pipe set is clamped in the inner cylinder and is opposite to the partition plate, two ends of each heat exchange pipe penetrate through the corresponding supporting hole and the corresponding heat collecting ring pipe set, the heat exchange pipes are communicated with the heat collecting ring pipe set, and the pyrolyzing sealing plate is arranged at the outlet end of the inner cylinder.
3. The low-rank coal drying and pyrolyzing integrated quality-improving treatment equipment according to claim 2, wherein the heat collecting ring pipe group is provided with a plurality of heat collecting ring pipes and a plurality of communicating pipes, the heat collecting ring pipes are opposite to the supporting holes, the diameters of the heat collecting ring pipes are different, the axes of the heat collecting ring pipes are positioned on the same line, positioned on the same vertical plane and arranged in concentric circles, the heat collecting ring pipes are communicated with one another through the communicating pipes, and the communicating pipes are arranged around the outer periphery of the heat collecting ring pipe positioned on the outermost side at intervals and are communicated with the heat collecting ring pipe.
4. The low-rank coal drying and pyrolyzing integrated quality-improving treatment process equipment according to claim 3, wherein a plurality of pyrolyzing feeding material scoops are arranged at intervals on the outer side wall of the inner cylinder body, and the plurality of pyrolyzing feeding material scoops are communicated with the inner cylinder body; the inlet end of the inner cylinder is provided with a main heat supply pipeline which is communicated with a plurality of heat exchange tubes; an oil gas delivery pipe is arranged at the outlet end of the inner cylinder body and communicated with the inner cylinder body; the side wall of the inner cylinder body is provided with a plurality of pyrolysis material guiding blades, and the plurality of pyrolysis material guiding blades are axially inclined; the inner side wall of the inner cylinder body is coated with a heat insulation coating.
5. The low-rank coal drying and pyrolyzing integrated quality-improving treatment process equipment according to claim 4, wherein the drying device comprises the outer cylinder, an annular grate plate and an annular seal plate, the outer cylinder is sleeved on the inner cylinder, the axis of the outer cylinder and the axis of the inner cylinder are located on the same line, a gap is formed between the inner side wall of the outer cylinder and the outer side wall of the inner cylinder, the inlet end of the inner cylinder is aligned with the air outlet end of the outer cylinder, and the annular grate plate is arranged at the air outlet end of the outer cylinder; the outlet end of the inner cylinder body protrudes from the feed end of the outer cylinder body, and the annular sealing plate is arranged at the feed end of the outer cylinder body; and a plurality of communicating pipes of the heat collecting ring pipe group penetrate through a plurality of air holes of the annular sealing plate and are communicated with the clearance of the outer cylinder body.
6. The low-rank coal drying and pyrolyzing integrated upgrading treatment process equipment according to claim 5, wherein the outer cylinder is provided with the material guide port, the inner side wall of the outer cylinder is provided with a plurality of drying material guide blades and a plurality of reverse spiral blades, the plurality of drying material guide blades are positioned between the material inlet end and the material guide port of the outer cylinder, the plurality of reverse spiral blades are positioned between the material guide port and the air outlet end of the outer cylinder, the plurality of drying material guide blades and the plurality of reverse spiral blades are axially inclined, and the inclination directions of the plurality of drying material guide blades are opposite to the inclination directions of the plurality of reverse spiral blades; and a plurality of pyrolysis feeding material scoops of the inner cylinder body are exposed out of the material guide port of the outer cylinder body.
7. The low-rank coal drying and pyrolyzing integrated quality-improving treatment process equipment according to claim 6, wherein a tempering air chamber, a plurality of raw material scoops and the kiln air hood are annularly arranged on the outer side wall of the outer cylinder body, the raw material scoops are arranged on the outer side wall of the outer cylinder body at intervals, the kiln air hood is covered on the pyrolysis feeding material scoops, and the tempering air chamber and the raw material scoops are close to a feeding end and communicated with the outer cylinder body; drying device still includes raw materials groove, raw materials groove set up in the below of outer barrel, set up in the lateral wall of outer barrel at least one of a plurality of raw materials spoon is located the raw materials inslot.
8. The low-rank coal drying and pyrolyzing integrated quality-improving treatment process equipment according to claim 6, wherein the circulating fan flow dividing device comprises an air outlet cover, a circulating fan flow dividing pipeline and a dust removing system connecting pipeline, the air outlet cover is arranged at the air outlet end of the outer cylinder and the main heat supply pipeline, the circulating fan flow dividing pipeline is arranged at the outer side of the drying device and communicated with the air outlet cover through a through pipe, the circulating fan flow dividing pipeline is further connected with the blending wind chamber of the outer cylinder and communicated with the blending wind chamber, and the dust removing system connecting pipeline is connected with the circulating fan flow dividing pipeline.
9. The low-rank coal drying and pyrolyzing integrated quality-improving treatment process equipment according to claim 8, wherein the discharging device comprises a discharging cover, a cooler and an air-locking discharger, the air-locking cover is arranged at the outlet ends of the annular discharging air-locking device and the inner cylinder, the oil-gas delivery pipe penetrates out of the discharging cover, the cooler is connected below the discharging cover and is mutually communicated with the discharging cover, and the air-locking discharger is connected with the cooler and is mutually communicated with the cooler and is provided with a slag outlet.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710337780.2A CN107663460B (en) | 2017-05-15 | 2017-05-15 | Low-rank coal drying and pyrolyzing integrated quality-improving treatment process equipment |
| PCT/CN2018/000157 WO2018209971A1 (en) | 2017-05-15 | 2018-04-23 | Low-rank coal integrated drying and pyrolysis quality-improving treatment processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710337780.2A CN107663460B (en) | 2017-05-15 | 2017-05-15 | Low-rank coal drying and pyrolyzing integrated quality-improving treatment process equipment |
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| CN107663460A CN107663460A (en) | 2018-02-06 |
| CN107663460B true CN107663460B (en) | 2020-12-25 |
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| CN201710337780.2A Active CN107663460B (en) | 2017-05-15 | 2017-05-15 | Low-rank coal drying and pyrolyzing integrated quality-improving treatment process equipment |
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| WO (1) | WO2018209971A1 (en) |
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| CN107663460B (en) * | 2017-05-15 | 2020-12-25 | 江苏鹏飞集团股份有限公司 | Low-rank coal drying and pyrolyzing integrated quality-improving treatment process equipment |
| CN112361798A (en) * | 2020-11-05 | 2021-02-12 | 江苏鹏威重型设备有限公司 | Rotary drying and calcining machine using steam as heating source |
| CN114410321A (en) * | 2022-01-04 | 2022-04-29 | 江苏鹏飞集团股份有限公司 | Pyrolysis rotary kiln for treating waste paint containing zinc |
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| WO2018209971A1 (en) | 2018-11-22 |
| CN107663460A (en) | 2018-02-06 |
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