CN110699996B - Discharge device for pressurized containers and steam cooking system - Google Patents
Discharge device for pressurized containers and steam cooking system Download PDFInfo
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- CN110699996B CN110699996B CN201810747092.8A CN201810747092A CN110699996B CN 110699996 B CN110699996 B CN 110699996B CN 201810747092 A CN201810747092 A CN 201810747092A CN 110699996 B CN110699996 B CN 110699996B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
- D21C7/08—Discharge devices
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Abstract
The invention relates to the field of pretreatment of fibrous biomass materials, and discloses a discharge device for a pressurized container and a steam cooking system, wherein the discharge device comprises a steam explosion feeding buffer bin, the upper end of the steam explosion feeding buffer bin is provided with a feed inlet, the lower end of the steam explosion feeding buffer bin is provided with a discharge outlet, the feed inlet of the steam explosion feeding buffer bin is communicated with the discharge outlet of the pressurized container to buffer and store the discharged materials of the pressurized container, and a dilute phase area, a dense phase area and a discharge area from top to bottom are defined in the steam explosion feeding buffer bin, wherein: a first steam distribution pipe is arranged in the discharging area, is close to the dense-phase area and can distribute steam to the dense-phase area so as to loosen the material in the dense-phase area; and/or a second steam distribution pipe is arranged in the discharge area, and the second steam distribution pipe can distribute steam to a discharge port of the steam explosion feeding buffer bin so as to facilitate discharge of materials.
Description
Technical Field
The invention relates to the field of pretreatment of fibrous biomass materials, in particular to a discharge device for a pressurized container and a steam cooking system comprising the discharge device.
Background
The continuous increase in energy demand and the ever-increasing environmental concerns of world economic development have forced the search for renewable energy sources, and biomass is gaining increasing attention as the only renewable resource that can be converted into liquid fuels. In the technology of producing liquid fuel from biomass, the technology of producing fuel ethanol from biomass is receiving attention. The existing industrialized fuel ethanol production uses sugar or grain as raw materials, but the yield is limited by the raw materials, so that the energy requirement is difficult to meet for a long time. Therefore, in the long term, the production of fuel ethanol by using cellulose-containing biomass materials (including crop straws, forestry processing waste, bagasse, municipal refuse and the like) as raw materials becomes one of the main approaches for solving the source of the raw materials and carrying out large-scale production.
Before ethanol is produced from biomass feedstock, the pulverized biomass feedstock needs to be pretreated to obtain cellulose and hemicellulose. In the prior art, a method for pretreating a biomass raw material generally adopts batch pretreatment, and specifically comprises the following steps: the method comprises the steps of putting raw materials into a high-temperature high-pressure container (such as a digester), steaming the biomass raw materials in the digester, after a period of time, intermittently and quickly opening a blow-off valve on the digester, and quickly discharging the cooked materials to obtain cellulose and hemicellulose.
However, in the above, when the blow valve is opened, a large amount of steam enters the cyclone in the next step through the blow valve and flows out from above the cyclone, and the pressure in the boiler is instantaneously lowered, and steam needs to be supplemented to maintain the pressure required for cooking, so that the cooking efficiency is greatly lowered, and energy is wasted.
Disclosure of Invention
The invention aims to solve the problems and provides a discharge device for a pressurized container and a steam cooking system comprising the discharge device, wherein the discharge device can realize continuous discharge of cooked materials and simultaneously can avoid energy waste caused by leakage of a large amount of steam through a blow-off valve.
In order to achieve the above object, in one aspect, the present invention provides a discharging device for a pressurized container, the discharging device includes a steam explosion feeding buffer bin, a feeding port is disposed at an upper end of the steam explosion feeding buffer bin, a discharging port is disposed at a lower end of the steam explosion feeding buffer bin, the feeding port of the steam explosion feeding buffer bin is communicated with the discharging port of the pressurized container to buffer and store a discharged material of the pressurized container, a dilute phase region, a dense phase region and a discharging region are defined in the steam explosion feeding buffer bin from top to bottom, wherein:
a first steam distribution pipe is arranged in the discharging area, is close to the dense-phase area and can distribute steam to the dense-phase area so as to loosen the material in the dense-phase area; and/or
And a second steam distribution pipe is arranged in the discharge area, and the second steam distribution pipe can distribute steam to a discharge port of the steam explosion feeding buffer bin so as to facilitate discharge of materials.
Preferably, a feeding hole of the steam explosion feeding buffer bin is positioned at the top of the steam explosion feeding buffer bin, and a discharging hole of the steam explosion feeding buffer bin is positioned at the bottom of the steam explosion feeding buffer bin; and/or
And the first steam distribution pipe and the second steam distribution pipe are respectively provided with a control valve.
Preferably, the discharge device comprises:
the steam explosion discharging buffer bin is provided with a feeding hole, a discharging hole and a steam outlet, the feeding hole of the steam explosion discharging buffer bin is communicated with the discharging hole of the steam explosion feeding buffer bin to receive discharged materials of the steam explosion feeding buffer bin, the discharging hole of the steam explosion discharging buffer bin is connected with a conveying pipeline for conveying steam explosion materials, the steam outlet of the steam explosion discharging buffer bin is connected with a steam exhaust pipeline, and the steam exhaust pipeline is communicated with the conveying pipeline to convey the steam explosion materials; and
the pressure discharge device is arranged between the discharge hole of the steam explosion feeding buffer bin and the feed inlet of the steam explosion discharging buffer bin and is used for discharging the pressure of materials in the steam explosion feeding buffer bin to the inside of the steam explosion discharging buffer bin.
Preferably, a feed port and a steam outlet of the steam explosion discharging buffer bin are positioned at the upper part of the steam explosion discharging buffer bin, a discharge port of the steam explosion discharging buffer bin is positioned at the bottom of the steam explosion discharging buffer bin, the steam explosion discharging buffer bin comprises a third steam distribution pipe which is arranged close to the discharge port of the steam explosion discharging buffer bin, and the third steam distribution pipe can distribute steam or compressed air to the discharge port of the steam explosion discharging buffer bin to facilitate discharging of materials; and/or
And a rotary discharge valve for controlling the discharge amount of the steam explosion materials is arranged at the discharge port of the steam explosion discharge buffer bin.
Preferably, the discharging device comprises a first level meter for detecting the material level in the steam explosion feeding buffer bin, and/or
The discharging device comprises a second material level meter for detecting the material level of the material in the steam explosion discharging buffer bin.
Preferably, the discharge device comprises a control unit arranged to: the operation of the under-pressure discharging device can be controlled according to the detection result of the first level indicator, and/or the operation of the rotary discharging valve can be controlled according to the detection result of the second level indicator.
Preferably, the steam exhaust pipeline is provided with a control valve for controlling the steam discharge capacity, and/or
The pressurized discharge device is a pressurized rotary discharge valve or a pressurized discharge screw.
The invention also provides a steam cooking system which comprises a feeding device, a cooking device and a discharging device which are sequentially connected, wherein the discharging device is the discharging device, and a feeding hole of the steam explosion feeding buffer bin is communicated with a discharging hole of the cooking device.
Preferably, the feeding device comprises a screw feeder for conveying materials to the cooking device and an anti-spraying structure matched with the screw feeder; and/or
The cooking device comprises a plurality of spiral digesters which are arranged in a snake-shaped connection mode.
Preferably, the steam cooking system further comprises:
the gas-solid separator is provided with a feed inlet, a discharge outlet and a steam outlet, and the feed inlet of the gas-solid separator is connected with the discharge outlet of the discharge device; and
the feed bin is provided with a feed inlet and a discharge outlet, the feed inlet of the feed bin is communicated with the discharge outlet of the gas-solid separator,
and the solid material separated by the gas-solid separator enters the storage bin, and steam is discharged from a steam outlet of the gas-solid separator.
Through the technical scheme, when the discharge device is additionally arranged at the discharge hole of the pressurized container, the discharged material of the pressurized container can be discharged after being buffered and stored by the steam explosion feeding buffer bin, so that the continuous discharge of the material can be ensured, the pressure in the pressurized container can be ensured, and the energy waste caused by steam loss can be avoided.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of one embodiment of a steam cooking system of the present invention;
FIG. 2 is a schematic view of another embodiment of the steam cooking system of the present invention.
Description of the reference numerals
10 screw feeder 101 raw material inlet
102 raw material outlet 11 moisture recovery device
12-reverse spray prevention valve 13 hydraulic cylinder
20 cooking device 21 first screw cooker
210 feed pipe 2101 steam inlet
2102 medicament inlet 211 blanking tube
22 second spiral digester 221 discharge pipe
30 steam explosion feeding buffer bin 301 dilute phase zone
302 dense phase zone 303 discharge zone
304 first steam distribution pipe 305 and second steam distribution pipe
306 first level indicator 31a pressure rotary discharge valve
31b pressure discharge screw 32 steam explosion discharge buffer bin
321 third steam distribution pipe 322 second level indicator
323 rotating discharge valve 33 steam exhaust pipe
34 gas-solid separator of material conveying pipeline 35
36 stock bin
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, the use of the terms of orientation such as "upper, lower, top, bottom" generally means the orientation in the assembled state of use, unless otherwise specified. "inner and outer" refer to the inner and outer contours of the respective component itself.
The invention provides a discharging device for a pressurized container, which comprises a steam explosion feeding buffer bin 30, wherein the upper end of the steam explosion feeding buffer bin 30 is provided with a feeding hole, the lower end of the steam explosion feeding buffer bin 30 is provided with a discharging hole, and the feeding hole of the steam explosion feeding buffer bin 30 is communicated with the discharging hole of the pressurized container so as to buffer and store the discharged material of the pressurized container. The steam explosion feeding buffer bin 30 is internally defined with a dilute phase zone 301, a dense phase zone 302 and a discharging zone 303 from top to bottom, wherein: a first steam distribution pipe 304 is arranged in the discharging area 303, and the first steam distribution pipe 304 is arranged close to the dense-phase area 302 and can distribute steam to the dense-phase area 302 so as to loosen the material in the dense-phase area 302; and/or a second steam distribution pipe 305 is arranged in the discharging area 303, and the second steam distribution pipe 305 can distribute steam to the discharging hole of the steam explosion feeding buffer bin 30 so as to facilitate discharging of materials.
In the above, the pressurized vessel refers to a vessel having a high pressure atmosphere inside, such as a digester.
Through the technical scheme, when the discharge device is additionally arranged at the discharge hole of the pressurized container, the steam explosion feeding buffer bin 30 can enable the discharged materials of the pressurized container to be discharged after being buffered and stored, so that not only can the continuous discharge of the materials be ensured, but also the pressure in the pressurized container can be ensured, and the energy waste caused by steam loss can be avoided.
Specifically, by arranging a dilute phase area 301, a dense phase area 302 and a discharging area 303 in the steam explosion feeding buffer bin 30, most of solid materials can be accumulated in the dense phase area 302 under the action of gravity of the materials entering the steam explosion feeding buffer bin 30 from a feeding hole of the steam explosion feeding buffer bin 30, and then the solid materials are discharged from a discharging hole of the steam explosion feeding buffer bin 30 through the discharging area 303; due to the material sealing effect of the materials in the dense-phase region, the steam in the dilute-phase region cannot be rapidly leaked out when the materials are discharged, so that the internal pressure of the pressurized container and the steam explosion feeding buffer bin 30 can be kept stable. In addition, by arranging the first steam distribution pipe 304 in the discharging area 303, the first steam distribution pipe 304 is preferably arranged close to the dense-phase area 302 and can distribute steam to the dense-phase area 302 to loosen the material in the dense-phase area 302, so that the problem that the solid material in the dense-phase area 302 is too densely accumulated and cannot be discharged smoothly can be avoided. The first steam distribution pipe 304 may be externally connected to a steam source, and a plurality of steam outlets may be disposed on the first steam distribution pipe 304, and the opening direction of the steam outlets may be downward or inclined, but preferably not upward, so as to prevent the material from entering and blocking the first steam distribution pipe 304. In addition, through set up second steam distribution pipe 305 in ejection of compact district 303 to make second steam distribution pipe 305 to the discharge gate steam distribution of steam explosion feeding surge bin 30 is in favor of the discharge of material, can make the interior material of steam explosion feeding surge bin 30 smoothly discharge from the discharge gate of steam explosion feeding surge bin 30. The second steam distribution pipe 305 may be externally connected to a steam source, and a plurality of steam outlets may be disposed on the second steam distribution pipe 305, and an opening direction of the steam outlets is preferably downward.
Through the arrangement of the first steam distribution pipe 304 and the second steam distribution pipe 305, the materials in the steam explosion feeding buffer bin 30 can be smoothly discharged, and meanwhile, the supplement of the steam in the pressurized container and the steam explosion feeding buffer bin 30 can be realized. Because there is a dense phase region between the steam distribution pipe and the outlet of the steam explosion feed buffer bin 30, most of the loosened steam supplied from the first steam distribution pipe 304 and/or the second steam distribution pipe 305 will rise to the dilute phase region through the dense phase region, and will not be discharged directly through the outlet of the steam explosion feed buffer bin 30.
Preferably, as shown in fig. 1 or fig. 2, the feeding hole of the steam explosion feeding buffer bin 30 is located at the top of the steam explosion feeding buffer bin 30, and the discharging hole of the steam explosion feeding buffer bin 30 is located at the bottom of the steam explosion feeding buffer bin 30. In addition, the first steam distribution pipe 304 and the second steam distribution pipe 305 may be respectively provided with a control valve to control the flow rate of the introduced steam. The control valve may be disposed upstream of the first steam distribution pipe 304 and the second steam distribution pipe 305.
Further, the discharge device of the present invention may further include:
the steam explosion discharging buffer bin 32 is provided with a feeding hole, a discharging hole and a steam outlet, the feeding hole of the steam explosion discharging buffer bin 32 is communicated with the discharging hole of the steam explosion feeding buffer bin 30 to receive discharged materials of the steam explosion feeding buffer bin 30, the discharging hole of the steam explosion discharging buffer bin 32 is connected with a conveying pipeline 34 used for conveying steam explosion materials, the steam outlet of the steam explosion discharging buffer bin 32 is connected with a steam exhaust pipeline 33, and the steam exhaust pipeline 33 is communicated with the conveying pipeline 34 to convey the steam explosion materials; and
the pressure discharge device is arranged between the discharge hole of the steam explosion feeding buffer bin 30 and the feed inlet of the steam explosion discharging buffer bin 32, and is used for discharging the pressure of the materials in the steam explosion feeding buffer bin 30 to the inside of the steam explosion discharging buffer bin 32.
Through the arrangement, in the discharging process of the pressurized container, the discharged material of the pressurized container firstly enters the steam explosion feeding buffer bin 30 for buffering and storage, and the pressure in the steam explosion feeding buffer bin 30 is equal to the pressure in the pressurized container; and then the materials in the steam explosion feeding buffer bin 30 are discharged into the steam explosion discharging buffer bin 32 through the pressure relief discharge device, the pressure in the steam explosion discharging buffer bin 32 is lower than the pressure in the steam explosion feeding buffer bin 30, most of solid materials in the steam explosion discharging buffer bin 32 can be discharged into a material conveying pipeline 34 from a discharge hole of the steam explosion discharging buffer bin 32, most of steam generated in the steam explosion process can enter a steam discharge pipeline 33 from a steam outlet of the steam explosion discharging buffer bin 32, and the steam is used as a conveying medium to convey the materials in the material conveying pipeline 34 to the next process. Compared with the mode of intermittently spraying materials in the prior art, the discharging device disclosed by the invention utilizes the steam explosion feeding buffer bin 30 to keep the pressure in the pressurized container on one hand, so that the cooking efficiency is effectively ensured; on the other hand, the stable and continuous discharge of the steam explosion materials is ensured by utilizing the pressurized discharge device, the steam explosion discharge buffer bin 32, the steam exhaust pipeline 33 and the material conveying pipeline 34, the steam which is flashed from the interior of the materials in the steam explosion process is effectively utilized to realize the material conveying, and the loss of the steam is avoided.
According to an embodiment of the steam explosion discharging buffer bin 32 in the present invention, specifically, as shown in fig. 1 or fig. 2, the feeding port and the steam outlet of the steam explosion discharging buffer bin 32 are located at the upper part of the steam explosion discharging buffer bin 32, and the discharging port of the steam explosion discharging buffer bin 32 is located at the bottom of the steam explosion discharging buffer bin 32. Thus, under the action of gravity, most of the solid materials entering the steam explosion discharging buffer bin 32 are positioned at the lower part of the steam explosion discharging buffer bin 32 and discharged into the material conveying pipeline 34 from the discharging port of the steam explosion discharging buffer bin 32; most of the steam is positioned at the upper part of the steam explosion discharging buffer bin 32 and is discharged into a steam discharging pipeline 33 from a steam outlet of the steam explosion discharging buffer bin 32.
Wherein, in order to make the interior material of steam explosion ejection of compact surge bin 32 discharge from the discharge gate of steam explosion ejection of compact surge bin 32 smoothly, steam explosion ejection of compact surge bin 32 can include and be close to third cloth steam pipe 321 that the discharge gate of steam explosion ejection of compact surge bin 32 set up, this third cloth steam pipe 321 can to the discharge gate cloth steam of steam explosion ejection of compact surge bin 32 is in order to do benefit to the discharge of material. The third steam distribution pipe 321 may be externally connected to a steam source (which may be air), and a plurality of steam outlets may be disposed on the third steam distribution pipe 321, and an opening direction of the steam outlets is preferably downward.
In order to monitor the material discharge condition in real time, ensure the continuous and uniform discharge of the material, and ensure the dense phase material level at the lower part of the steam explosion feeding buffer bin 30, in the present invention, the discharge device may include a first material level meter 306 for detecting the material level in the steam explosion feeding buffer bin 30 and/or a second material level meter 322 for detecting the material level in the steam explosion discharging buffer bin 32. The first level indicator 306 and/or the second level indicator 322 can be interlocked with the discharge device in an automated control manner, i.e. the discharge speed can be controlled by the automated control instrument according to the detected level height, so as to ensure that the level in the steam explosion feed buffer bin 30 and the steam explosion discharge buffer bin 32 is kept substantially stable.
In the invention, in order to control the discharge amount of the steam explosion materials, a rotary discharge valve 323 can be arranged at the discharge port of the steam explosion discharge buffer bin 32.
Furthermore, the discharge device may further comprise a control unit, which may be arranged to: the operation of the discharge device with pressure can be controlled on the basis of the detection result of the first level indicator 306 and/or the operation of the rotary discharge valve 323 can be controlled on the basis of the detection result of the second level indicator 322.
The pressurized discharge device and the rotary discharge valve 323 can be driven to operate by a driving device (the driving device can comprise a motor, a coupling and a speed reducer). When the device is used, when the material level of the material in the buffer bin 30 is lower than the preset material level (a proper material level can be set according to actual conditions), the control unit controls the operation of the driving device to slow down the operation of the pressurized discharging device, so that the discharging amount is reduced, otherwise, the discharging is accelerated; when the material level of the material in the steam explosion discharging buffer bin 32 is higher than the preset material level, the control unit controls the operation of the driving device to enable the rotary discharging valve 323 to rotate fast, so that the discharging amount is increased, and otherwise, the discharging speed is reduced. This also avoids the pressure in the pressurized vessel and the steam explosion feed surge bin 30 being affected.
In the above, the pressurized discharge device may be a pressurized rotary discharge valve 31a (see fig. 1) or a pressurized discharge screw 31b (see fig. 2), but may be other devices. When the pressurized discharge device adopts the pressurized rotary discharge valve 31a, the pressurized rotary discharge valve 31a can be arranged on a pipeline connecting a discharge hole of the steam explosion feeding buffer bin 30 and a feed hole of the steam explosion discharging buffer bin 32; when the pressurized discharge device adopts the pressurized discharge screw 31b, the inlet of the pressurized discharge screw 31b is communicated with the discharge hole of the steam explosion feeding buffer bin 30, the outlet of the pressurized discharge screw 31b is communicated with the feed hole of the steam explosion discharge buffer bin 32, the pressurized discharge screw 31b discharges materials into the steam explosion discharge buffer bin 32 through extrusion, wherein the pressure at the inlet end of the pressurized discharge screw 31b is higher than the pressure at the outlet end.
In the invention, in order to control the discharge of the gas in the steam explosion discharge buffer bin 32 and avoid the waste of gas loss, a control valve for controlling the discharge capacity of the gas can be arranged on the steam discharge pipeline 33.
The invention also provides a steam cooking system, which comprises a feeding device, a cooking device 20 and a discharging device which are sequentially connected, wherein the discharging device is the discharging device, and a feeding hole of the steam explosion feeding buffer bin 30 is communicated with a discharging hole of the cooking device 20.
The steam cooking system can be used in a pretreatment process of a biomass raw material containing fibers, for example, crushed and wetted straws can be conveyed into the cooking device 20 by the feeding device to be heated and pressurized for cooking, so that the materials are softened, hemicellulose connecting cellulose and lignin is degraded into xylose or xylose oligomers, and finally the cooked materials are discharged to the next process by the discharging device.
According to an embodiment of the feeding device of the present invention, as shown in fig. 1 or fig. 2, the feeding device may include a screw feeder 10 for feeding the material to the cooking device 20 and an anti-spraying structure cooperating with the screw feeder 10.
The screw feeder 10 may include a driving shaft with a screw blade, a housing disposed around the driving shaft, and a driving device located at the rear end of the housing and capable of driving the driving shaft to rotate, the interior of the housing is divided into a feeding section, a compression section and a material plug section, and the housing is provided with a material inlet 101 located at the feeding section and a material outlet 102 located at the material plug section. Wherein the feed section is adapted to receive the feedstock and to convey the feedstock forwardly (and to the right as viewed in the drawings) to the compression section under the action of the drive shaft; the shell of the compression section is generally conical, and the volume of a spiral cavity enclosed between two adjacent spiral blades in the compression section is continuously reduced, so that the volume of the material is continuously compressed while the material is conveyed forwards in the compression section; in the material plug section, the driving shaft is an optical axis without helical blades, the raw material compressed by the compression section enters the material plug section to form a material plug in the material plug section, and the material plug is pushed forward continuously by the material at the rear part, so that the raw material is continuously fed into the cooking device 20 through the raw material outlet 102.
In addition, a water outlet can be arranged on the shell of the compression section, and the feeding device can comprise a moisture recovery device 11 arranged below the water outlet. In this way, the moisture squeezed out of the material during compression in the compression section can be discharged from the water outlet and collected by the moisture recovery device 11 for centralized processing or recycling after processing, for example, the squeezed moisture can be returned to the straw infiltration system for reuse.
In the above, by the formation of the plug and the pressure of the gas medium in the cooking device 20 acting on the material in the plug section, the plug section can be pressed tightly, so that the gas can be prevented from leaking from the screw feeder 10 and carrying the material back out from the raw material inlet 101. And through the matching of the anti-reverse-spraying structure and the screw feeder 10, the formed material plug can be broken up to be beneficial to discharge while the reverse spraying is prevented.
In the invention, the anti-reverse spraying structure preferably comprises an anti-reverse spraying valve 12 and a hydraulic cylinder 13, wherein the anti-reverse spraying valve 12 is fixed at the end part of the cylinder rod of the hydraulic cylinder 13, and the anti-reverse spraying valve 12 can be plugged into or withdrawn from the raw material outlet 102 of the screw feeder 10 in the telescopic process of the cylinder rod. When the screw feeder 10 cannot form a compact material plug at the outlet due to insufficient feeding, the current value of a driving motor of the screw feeder is reduced, and when the value is reduced to a set value, the anti-back-spray valve 12 is driven by a hydraulic system to extend forwards to block the outlet of the screw feeder 10, so that the steam is prevented from being reversely sprayed from the raw material inlet 101 of the screw feeder 10; in normal operation, the anti-blowout valve 12 is withdrawn from the material outlet 102, and the tip thereof is opposite to the material outlet 102, so that the compact material plug extruded from the material outlet 102 can be ejected and fall into the feeding pipe 210 below.
According to an embodiment of the cooking device 20 of the present invention, the cooking device 20 may comprise a plurality of spiral cookers arranged in a serpentine connection. For example, as shown in fig. 1 or fig. 2, the cooking device 20 comprises a first spiral digester 21 and a second spiral digester 22, wherein the feed inlet of the first spiral digester 21 is provided with a feed pipe 210 communicated with the raw material outlet 102 of the spiral feeder 10, and the feed pipe 210 is provided with a steam inlet 2101 and an agent inlet 2102 for respectively introducing steam and an agent; the discharge hole of the first spiral boiler 21 is communicated with the feed inlet of the second spiral boiler 22 through a discharge pipe 211, and the discharge hole of the second spiral boiler 22 is communicated with the feed inlet of the steam explosion feed buffer bin 30 through a discharge pipe 221. In use, material entering the first spiral digester 21 from the feed pipe 210 moves from the feed end to the discharge end of the first spiral digester 21 under the push of the screw of the first spiral digester 21, falls into the second spiral digester 22 through the feed pipe 211, moves from the feed end to the discharge end of the second spiral digester 22 under the push of the screw of the second spiral digester 22, and is finally discharged from the discharge pipe 221 into the steam explosion feed buffer bin 30.
In the present invention, the steam cooking system may further include:
the gas-solid separator 35 is provided with a feeding hole, a discharging hole and a steam outlet, and the feeding hole of the gas-solid separator 35 is connected with the discharging end of the material conveying pipeline 34; and
a bin 36, wherein the bin 36 is provided with a feeding hole and a discharging hole, the feeding hole of the bin 36 is communicated with the discharging hole of the gas-solid separator 35,
wherein, the solid material separated by the gas-solid separator 35 enters the stock bin 36, and the steam is discharged from the steam outlet of the gas-solid separator 35.
For example, as shown in fig. 1 or fig. 2, the feed inlet of the gas-solid separator 35 is located at the upper part of the gas-solid separator 35, the discharge outlet of the gas-solid separator 35 is located at the bottom of the gas-solid separator 35, the vapor outlet of the gas-solid separator 35 is located at the top of the gas-solid separator 35, and the silo 36 is located below the gas-solid separator 35. Wherein, the gas discharged from the steam outlet of the gas-solid separator 35 can be introduced into a tail gas absorption washing tower for further purification treatment and then discharged into the atmosphere, and the material entering the stock bin 36 is conveyed to a subsequent enzyme hydrolysis system.
In the present invention, the gas-solid separator 35 is preferably a cyclone separator.
Through the arrangement, the steam cooking system can realize continuous feeding, cooking, discharging and separation of materials, so that the pretreatment process of biomass raw materials (such as cellulosic ethanol raw materials) is efficiently finished. The structural design of the steam cooking system effectively ensures the stability of the temperature and the pressure in the cooking device 20, and avoids the waste of energy. Therefore, the steam cooking system overcomes the defects of the existing intermittent pretreatment operation, improves the pretreatment efficiency of the cellulosic ethanol raw material, and realizes the continuous and efficient industrial production of the pretreatment of the cellulosic ethanol raw material.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. The utility model provides a discharge device for taking pressure container, a serial communication port, discharge device includes steam explosion feeding surge bin (30), the upper end of steam explosion feeding surge bin (30) is provided with the feed inlet, the lower extreme of steam explosion feeding surge bin (30) is provided with the discharge gate, the feed inlet of steam explosion feeding surge bin (30) with take the discharge gate intercommunication of pressure container for be used for buffering and storing take the discharge of pressure container, it has dilute phase district (301), dense phase district (302) and discharging area (303) from top to bottom to inject in steam explosion feeding surge bin (30), wherein:
a first steam distribution pipe (304) is arranged in the discharging area (303), and the first steam distribution pipe (304) is arranged close to the dense-phase area (302) and can distribute steam to the dense-phase area (302) so as to loosen the material in the dense-phase area (302); and/or
A second steam distribution pipe (305) is arranged in the discharging area (303), and the second steam distribution pipe (305) can distribute steam to a discharging port of the steam explosion feeding buffer bin (30) so as to facilitate discharging of materials.
2. The discharge device according to claim 1, characterized in that the inlet of the steam explosion feed surge bin (30) is located at the top of the steam explosion feed surge bin (30), and the outlet of the steam explosion feed surge bin (30) is located at the bottom of the steam explosion feed surge bin (30); and/or
The first steam distribution pipe (304) and the second steam distribution pipe (305) are respectively provided with a control valve.
3. Discharge device according to claim 1 or 2, characterized in that the discharge device comprises:
the steam explosion discharging buffer bin (32) is provided with a feeding hole, a discharging hole and a steam outlet, the feeding hole of the steam explosion discharging buffer bin (32) is communicated with the discharging hole of the steam explosion feeding buffer bin (30) to be used for receiving discharged materials of the steam explosion feeding buffer bin (30), the discharging hole of the steam explosion discharging buffer bin (32) is connected with a conveying pipeline (34) used for conveying steam explosion materials, the steam outlet of the steam explosion discharging buffer bin (32) is connected with a steam exhaust pipeline (33), and the steam exhaust pipeline (33) is communicated with the conveying pipeline (34) to convey the steam explosion materials; and
the pressure discharge device is arranged between the discharge hole of the steam explosion feeding buffer bin (30) and the feed inlet of the steam explosion discharging buffer bin (32) and is used for discharging the pressure of materials in the steam explosion feeding buffer bin (30) to the inside of the steam explosion discharging buffer bin (32).
4. The discharging device according to claim 3, wherein the feeding port and the steam outlet of the steam explosion discharging buffer bin (32) are located at the upper part of the steam explosion discharging buffer bin (32), the discharging port of the steam explosion discharging buffer bin (32) is located at the bottom of the steam explosion discharging buffer bin (32), the steam explosion discharging buffer bin (32) comprises a third steam distribution pipe (321) arranged close to the discharging port of the steam explosion discharging buffer bin (32), and the third steam distribution pipe (321) can distribute steam or compressed air to the discharging port of the steam explosion discharging buffer bin (32) to facilitate discharging of the material; and/or
A discharge port of the steam explosion discharge buffer bin (32) is provided with a rotary discharge valve (323) for controlling the discharge amount of the steam explosion materials.
5. Discharge device according to claim 4,
the discharging device comprises a first material level meter (306) for detecting the material level in the steam explosion feeding buffer bin (30), and/or
The discharging device comprises a second material level meter (322) for detecting the material level of the material in the steam explosion discharging buffer bin (32).
6. The discharge device of claim 5, comprising a control unit configured to: -the operation of the discharge device under pressure can be controlled on the basis of the detection result of the first level gauge (306), and/or-the operation of the rotary discharge valve (323) can be controlled on the basis of the detection result of the second level gauge (322).
7. Discharge device according to claim 3,
the steam exhaust pipeline (33) is provided with a control valve for controlling the steam discharge and/or
The pressurized discharge device is a pressurized rotary discharge valve (31a) or a pressurized discharge screw (31 b).
8. Steam cooking system comprising a feeding device, a cooking device (20) and a discharge device connected in sequence, characterized in that the discharge device is a discharge device according to any of claims 1-7, wherein the feed inlet of the steam exploded feed surge bin (30) communicates with the discharge outlet of the cooking device (20).
9. Steam cooking system according to claim 8, wherein the feeding means comprises a screw feeder (10) for feeding material to the cooking device (20) and an anti-blow back arrangement cooperating with the screw feeder (10); and/or
The cooking device (20) comprises a plurality of spiral cookers arranged in a serpentine connection.
10. The steam cooking system of claim 8, further comprising:
the gas-solid separator (35) is provided with a feeding hole, a discharging hole and a steam outlet, and the feeding hole of the gas-solid separator (35) is connected with the discharging hole of the discharging device; and
a bin (36), wherein the bin (36) is provided with a feeding hole and a discharging hole, the feeding hole of the bin (36) is communicated with the discharging hole of the gas-solid separator (35),
the solid material separated by the gas-solid separator (35) enters the storage bin (36), and steam is discharged from a steam outlet of the gas-solid separator (35).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810747092.8A CN110699996B (en) | 2018-07-09 | 2018-07-09 | Discharge device for pressurized containers and steam cooking system |
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| CN201810747092.8A CN110699996B (en) | 2018-07-09 | 2018-07-09 | Discharge device for pressurized containers and steam cooking system |
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| US6325888B1 (en) * | 1995-08-31 | 2001-12-04 | Andritz-Ahlstrom Inc. | Method for pulping sawdust |
| CN2328687Y (en) * | 1998-04-29 | 1999-07-14 | 泰安市轻工机械厂 | Reclaiming equipment for waste heat of paper-making digestion |
| CN2835321Y (en) * | 2006-03-09 | 2006-11-08 | 周芝玉 | Enforced bottom-charging-steam and mixing device for ball type pulping equipment for making paper |
| CN101905233B (en) * | 2010-07-19 | 2012-09-05 | 安徽格义清洁能源技术有限公司 | Energy-saving and noise-reducing spraying device of gas-explosive material |
| CN203878405U (en) * | 2014-05-04 | 2014-10-15 | 山东天地缘实业有限公司 | Non-wood cleaning pulping material preparing and steaming system |
| CN104532643A (en) * | 2014-11-26 | 2015-04-22 | 中粮生化能源（肇东）有限公司 | Steam explosion blowout discharging apparatus and steam explosion equipment |
| CN204435077U (en) * | 2014-12-20 | 2015-07-01 | 重庆三好纸业有限公司 | The vertical device for discharging of continuous steamer |
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