CN215250619U - Rotary furnace plate and pyrolysis reactor - Google Patents

Abstract

The utility model relates to a processing device for cellulose-containing materials, in particular to a rotary furnace disc and a pyrolysis reactor, which comprises a disc body and at least one stirring part, wherein the disc body is configured to be rotatably installed, and the stirring surface of the disc body is provided with a stirring part; the stirring member is configured to be fixedly installed, and the disc body freely rotates relative to the stirring member. When the reactor of this application moves, dial material spare and stir material spare and act on material and deposition simultaneously for the inside bridge phenomenon that hardly forms of reactor, the material spare that stirs of this application has the runner, and it is inside through having coolant, and coolant and the inside material of reactor, gas carry out the heat transfer and can effectively reduce the inside temperature of reactor, thereby the inside coking degree of effective control reactor, and then effectively avoid the formation that hardens.

Description

Rotary furnace plate and pyrolysis reactor

Technical Field

The utility model relates to a to the processing apparatus who contains the cellulose material, especially relate to a rotary furnace dish and pyrolytic reaction ware.

Background

The biomass pyrolysis is a thermochemical conversion technical method for decomposing biomass macromolecular substances (lignin, cellulose and hemicellulose) into smaller molecular fuel substances (solid carbon, combustible gas and bio-oil) through thermochemical reaction by heating the biomass to 250-700 ℃ under the condition that no oxidant (air, oxygen, water vapor and the like) exists or only limited oxygen is provided. Analyzing the biomass from the perspective of chemical reactions, the biomass undergoes complex thermochemical reactions in the pyrolysis process, including molecular bond breaking, isomerization, small molecule polymerization and the like. (Zhao Tinglin, Wangpeng, Deng Dajun, etc.. Biomass pyrolysis research status and prospect [ J ] New energy industry, 2007, 5: 54-60).

The products of biomass pyrolysis are combustible pyrolysis gas and solid biomass charcoal, which are products applicable to energy sources. Besides being used as fuel for supplying heat, the fuel gas can be further reformed to be used as raw material for generating electricity and synthesizing green liquid fuel; the biomass charcoal has a great additional value besides being used as fuel, and is also used as fuel for metal smelting, food and light industry, reducing agent for electric furnace smelting and covering agent for protecting metal from being oxidized during metal refining. It is commonly used as raw material of carbon disulfide, active carbon, etc. in chemical industry.

Chinese patent CN201210590914.9 discloses a vertical pyrolysis reactor. Comprises a reactor shell, a feeding device, a biomass gas outlet at the top of the reactor, an ash discharging device at the bottom of the reactor and a grate inside the reactor; the feeding device is positioned at the bottom of the reactor, and the discharge hole of the feeding device is positioned at the center of the bottom in the reactor. The layered rotating furnace plate is adopted, however, the rotation control among the furnace plate layers is complex in manufacturing, the rotating material stirring effect is poor in use, in addition, the hardening and bridging phenomena are easily generated in the operation of the reactor, the specific reason is that the ash melting point of the biomass fuel is low, so the deposited ash is easily attached to the tube walls of a hearth and a superheater, if the water content of the fuel is too large, the water vapor generated in the combustion can soften potassium (because the main component of the ash is potassium), and the potassium causes coking after being heated for a long time, so the hardening or bridging phenomena are generated.

The applicant proposes a pyrolysis reactor, and particularly refers to chinese patent CN201420472570.6, which discloses a vertical pyrolysis reactor rotary furnace plate, comprising a conical plate body, a furnace plate rotating device penetrating through a feeding cavity of the plate body and the bottom of the plate body, wherein a plurality of saw-toothed material shifting racks are fixedly welded on the surface of the plate body. The material is dialled in the mode that sets up the material rack of dialling on rotatory stove plate, however this design of dialling the material rack is to the material harden, the effect of alleviating of bridging is limited, because dial the material rack and just avoid the production of coking through stirring, the scope of its effect is limited moreover.

Disclosure of Invention

The utility model discloses an aim at overcome among the prior art the inside hardening of reactor, the limited problem of effect of alleviating of bridging, provide a rotary furnace dish, can solve the inside problem that hardens, the bridging of reactor well.

The utility model discloses a still another purpose is overcome current vertical pyrolytic reaction ware and dials the material effect not good, provides a pyrolytic reaction ware that dials the material effect and obviously promotes.

The utility model provides a technical scheme that its technical problem adopted is:

an aspect of the utility model provides a rotary furnace plate, include: the material stirring device comprises a disc body, a material stirring part and a material stirring part, wherein the disc body is configured to be rotatably installed, and the material stirring surface of the disc body is provided with the material stirring part; at least one stirring member configured to be fixedly mounted, the disc being free to rotate relative to the stirring member.

Furthermore, the stirring part is provided with a flow channel, and a cooling medium passes through the stirring part.

Preferably, the stirring part is configured to extend along the material stirring surface of the tray body, and the extending direction of the stirring part forms an included angle with the rotating direction of the material stirring part.

Preferably, the tray is rotatably disposed on a feed shaft penetrating the tray.

Another aspect of the present invention provides a pyrolysis reactor, including: the above-mentioned rotary hearth; the fixing seat is configured to be fixedly installed, the disc body freely rotates relative to the fixing seat, and the material stirring part is fixedly installed on the fixing seat.

Preferably, at least one fluid channel is formed in the fixing seat, a first end of the fluid channel is communicated with the flow channel of the stirring part, and a second end of the fluid channel is connected with a cooling system.

Preferably, the tray body is rotatably arranged on a feeding shaft penetrating through the tray body, and the discharge end of the feeding shaft is relatively fixed with the fixed seat.

Preferably, a rotating shaft sleeve is sleeved on the periphery of the feeding end of the feeding shaft and freely rotates relative to the feeding shaft, a first end face of the rotating shaft sleeve is fixedly connected with the disc body, and rotating teeth are arranged on the rotating shaft sleeve.

Further, the pyrolysis reactor further comprises a rack, the feeding shaft is fixed to the rack, the feeding end of the feeding shaft is communicated with the outlet of the vertical spiral feeder, the inlet of the vertical spiral feeder is communicated with the outlet of the horizontal spiral feeder, and the inlet of the horizontal spiral feeder is provided with a hopper.

Preferably, the pyrolysis reactor further comprises a shell, the fixed seat and the disc body are arranged in the shell, the fixed seat is fixedly connected with the shell, the disc body freely rotates relative to the shell, a material channel is formed between the disc body and the shell, an ash outlet is formed between the bottom of the disc body and the shell, an ash discharging device is further arranged on the lower portion of the shell, and the material channel is communicated with the ash discharging device through the ash outlet.

This application rotary furnace dish and pyrolytic reaction ware's beneficial effect:

1. the disk body of rotatory furnace plate in this application rotatory furnace plate and the pyrolytic reaction ware is rotatable, has the material of dialling on the material level of disk body, simultaneously, the utility model provides a stir the material spare and be configured into fixed mounting. When the reactor is operated, the stirring part and the stirring part simultaneously act on materials and deposited ash, so that the bridging phenomenon is difficult to form inside the reactor;

2. as is well known, under the condition that the ash melting point is certain, the temperature level and the distribution thereof in the reactor become important factors whether coking occurs or not, the temperature increases, the coking degree increases according to the exponential law, the stirring part of the application is provided with a flow channel, a cooling medium is arranged in the stirring part, the cooling medium exchanges heat with the material and the gas in the reactor to effectively reduce the temperature in the reactor, thereby effectively controlling the coking degree in the reactor and further effectively avoiding the formation of hardening.

Drawings

Fig. 1 is a schematic view of the overall structure of a rotary furnace plate of the present invention;

fig. 2 is a schematic diagram of the overall structure of a pyrolysis reactor of the present invention.

Wherein: 1-a disc body, 11-a material stirring piece, 12-a material stirring surface, 13-a rotating shaft sleeve and 131-a rotating tooth; 2-stirring the material; 3-a feeding shaft, 31-a feeding end, 32-a discharging end and 33-a flange plate; 4-fixing the base; 5-a frame; 6-shell, 61-biomass gas outlet; 7-ash removal device; 8-horizontal spiral feeder, 81-hopper; 9-vertical screw feeder.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The specific embodiment is as follows:

fig. 1 shows a schematic view of an overall structure of a rotary oven tray according to the present embodiment, where the rotary oven tray includes a tray body 1, the tray body 1 is configured to be rotatably installed, and a material stirring member 11 is disposed on a material stirring surface 12 of the tray body 1. The rotary furnace plate of the present embodiment further comprises at least one stirring member 2, preferably three stirring members 2 in the present embodiment, wherein the three stirring members 2 are configured to be fixedly installed and uniformly distributed, and the plate body 1 can freely rotate relative to the stirring members 2.

It should be known to those skilled in the art that, due to the low ash melting point of the biomass fuel, the ash deposits are easily attached to the tube walls of the furnace and the superheater, if the water content of the fuel is too large, the water vapor generated during combustion will soften potassium (because the main component of the ash is potassium), the potassium will cause coking after being heated for a long time, and the coking will form phenomena such as hardening and bridging after being accumulated, whereas the stirring member 2 of the present embodiment is configured to be fixedly installed, the tray body 1 and the stirring member 11 thereon can rotate relative to the stirring member 2, so that the ash deposits are difficult to form bridging under the dual actions of the stirring member 11 and the stirring member 2.

Further, the stirring member 2 of the present embodiment has a flow passage, and a cooling medium passes through the inside thereof.

It is known that, when the ash melting point is constant, the temperature level in the furnace and the distribution thereof become important factors for the occurrence of coking. Experience has shown that: the coking of the boiler is mostly on the surfaces of a flue and a reactor, and in the process that liquid or soft ash particles move to a heating surface under the action of inertia, because the ash particles have high movement speed and poor cooling effect, the molten ash particles are easy to adhere, so that a slag layer is quickly accumulated and grown. The temperature has very important influence on the coking in the furnace, and researches show that the degree of coking increases exponentially when the temperature is increased. Coking not only affects heat exchange of the heating surface of the boiler, but also coke blocks and deposited ash block a flue gas channel, the flow rate of the flue gas is increased, a flue gas corridor is formed, abrasion of the heating surface is aggravated, and normal operation of production is affected. The material stirring part is provided with a flow channel, and the cooling medium is arranged in the material stirring part, and the cooling medium and the material and gas in the reactor can exchange heat to effectively reduce the temperature in the reactor, so that the coking degree in the reactor can be effectively controlled, and the hardening formation can be effectively avoided.

Preferably, the stirring part 2 is configured to extend in parallel along the material stirring surface 12 of the tray body 1, and the extending direction of the stirring part 2 forms an included angle with the rotating direction of the material stirring part 11, and preferably, the extending direction of the stirring part 2 forms a 90-degree included angle with the rotating direction of the material stirring part 11, which is more beneficial to preventing the bridging phenomenon.

According to one embodiment of the application, the tray 1 is rotatably arranged on a feed shaft 3 extending through the tray 1. The design enables the materials to be subjected to a reaction process on the tray body, and the materials are prevented from being directly separated without reaction.

Fig. 2 shows an overall structural schematic diagram of a pyrolysis reactor of this embodiment, the pyrolysis reactor of this embodiment includes the above-mentioned rotary furnace tray and the fixing base 4, the fixing base 4 is configured to be fixedly installed, specifically, the fixing base 4 is sleeved on the feeding shaft 3 and forms an interference fit, and of course, may also be directly integrated with the feeding shaft 3, so that the tray body 1 may freely rotate relative to the fixing base 4, and further, the stirring member 2 is fixedly installed on the fixing base 4, for example, may be screwed or welded, and is not limited thereto. Preferably, the stirring elements 2 are three and evenly distributed.

In this embodiment, a fluid channel is formed in the fixing base 4, a first end of the fluid channel is respectively communicated with the flow channels of the three stirring members 2, a second end of the fluid channel is connected with the cooling system, and cooling water is introduced into the reactor through the cooling system to cool the inside of the reactor, so that the formation of coking is effectively reduced.

It should be noted that, the one end that fixing base 4 was kept away from to three stirring material spare 2 can be unsettled, and cooling water can directly flow out from this end, erodees the export of deposition, can effectively prevent the coking and the hardening of the material of deposition export, prevents that the passageway from being stifled, and the one end that fixing base 4 was kept away from to three stirring material spare 2 of course also can communicate in cooling system to form endless cooling water system, also can cool down to reactor inside equally.

In addition, one skilled in the art will recognize that other cooling media may be used, not limited to water cooling.

According to an embodiment of the present invention, the pyrolysis reactor of this embodiment further comprises a frame 5, the frame 5 being used for bearing and mounting the rotary hearth.

In the present embodiment, the rotary furnace plate is rotatably mounted on the frame 5 by means of the feeding shaft 3 and the rotating shaft sleeve 13, specifically, one end of the feeding shaft 3 close to the fixed seat 4 is formed as a discharging end 32, the other end is formed as a feeding end 31, the feeding shaft 3 is fixed on the frame 5, for example, fixed on the frame 5 by means of a fixed plate, the fixed plate can be welded or screwed on the frame 5, and the fixed plate and the feeding shaft 3 can also be fixed by welding or screwing. Further, the periphery of the feeding end 31 is sleeved with a rotating shaft sleeve 13, the rotating shaft sleeve 13 freely rotates relative to the feeding shaft 3, and one end face of the rotating shaft sleeve 13 is fixedly connected with the disc body 1, including but not limited to screwing and welding, so that the disc body 1 can relatively rotate relative to the rack 5.

In order to better bear and limit the rotation motion of the disc body 1, three sets of roller sets are further arranged on the rack 5, the disc body 1 is borne above the three sets of roller sets, and preferably, the rollers of each set of roller sets are all formed with limiting flanges to be matched with the bottom of the disc body 1 so as to limit the motion track of the disc body 1.

The disk body 1 of this embodiment can be in order rotatory through the driving motor drive, specifically, be equipped with on the pivot cover 13 of disk body 1 fixed connection and change tooth 131, be equipped with driving motor on the frame 5, be equipped with on driving motor's the output shaft with change tooth 131 complex drive gear to driving motor passes through pivot cover 13 drive disk body 1 and rotates, and the rotational speed through control driving motor's rotational speed can the accurate control disk body 1, thereby the thickness of accurate control material.

According to the utility model discloses an embodiment, the pyrolytic reaction ware of this embodiment still includes casing 6, and casing 6 embeds fixing base 4 and disk body 1, fixing base 4 and casing 1 fixed connection, and disk body 1 is 6 free rotations of casing 6 relative, forms material passageway between disk body 1 and the casing 6, forms the ash hole between disk body 1's bottom and the casing 6, and further, casing 6's lower part still is equipped with out grey device 7, and material passageway communicates in ash device 7 through the ash hole.

According to an embodiment of the utility model, biomass gas export 61 has been seted up at the top of casing 6.

According to the utility model discloses an embodiment, the feed end 31 of pay-off axle 3 communicates in the export of vertical screw feeder 9, specifically, and the feed end 31 terminal surface of pay-off axle 3 is equipped with ring flange 33, and pay-off axle 3 passes through ring flange 33 to be connected with vertical screw feeder 9, and the import of vertical screw feeder 9 communicates in the export of horizontal screw feeder 8, and connected mode includes but not limited to flange joint, and the import of horizontal screw feeder 8 is equipped with hopper 81.

The working principle of the pyrolysis reactor is as follows:

in the operation process of the reactor, the raw materials are fed by a hopper 81, the biomass raw materials in the embodiment are preferably straws with the length of less than 10cm, the raw materials are conveyed to a vertical spiral feeder 9 through a horizontal spiral feeder 8, then the raw materials are conveyed to a feeding shaft 3 through the vertical spiral feeder 9, further, the raw materials are conveyed out from a discharging end 32 of the feeding shaft 3 and fall onto a tray body 1 for biomass pyrolysis, the tray body 1 rotates according to a set speed in the pyrolysis process, accumulated ash generated by pyrolysis sequentially passes through a material channel and an ash outlet to enter an ash discharging device 7, in the pyrolysis process, a material stirring part 11 and a material stirring part 2 simultaneously act on the materials and the accumulated ash, the accumulated ash is difficult to form a bridging phenomenon in the reactor, meanwhile, the material stirring part 2 of the reactor is provided with a flow channel, a cooling medium passes through the inside of the material stirring part, and gas in the reactor exchange heat, so that the temperature in the reactor can be effectively reduced, thereby effectively controlling the coking degree in the reactor and further effectively avoiding the formation of hardening.

It should be understood that the above description of the specific embodiments is only for the purpose of explanation and not for the purpose of limitation. Obvious changes or variations caused by the spirit of the present invention are within the scope of the present invention.

Claims (10)

1. A rotary hearth plate, comprising:

the material stirring device comprises a tray body (1), wherein the tray body (1) is configured to be rotatably installed, and a material stirring piece (11) is arranged on a material stirring surface (12) of the tray body (1);

at least one stirring element (2), the stirring element (2) being configured to be fixedly mounted, the disc body (1) being free to rotate relative to the stirring element (2).

2. A rotary hearth according to claim 1, wherein said stirring element (2) has flow channels and a cooling medium is passed through the inside thereof.

3. A rotary hob according to claim 1, characterized in, that said stirring elements (2) are arranged to extend along the material-ejecting face (12) of said hob (1), the direction of extension of said stirring elements (2) forming an angle with the direction of rotation of said material-ejecting elements (11).

4. A rotary oven tray according to claim 1, characterized in that the tray body (1) is rotatably arranged on a feed shaft (3) extending through the tray body (1).

5. A pyrolysis reactor, comprising:

the rotary hearth according to claim 1;

the fixing seat (4), the fixing seat (4) is configured to be fixedly installed, the disc body (1) freely rotates relative to the fixing seat (4), and the stirring part (2) is fixedly installed on the fixing seat (4).

6. A pyrolysis reactor according to claim 5, characterized in that at least one fluid channel is formed in the fixed base (4), a first end of the fluid channel is communicated with the flow channel of the stirring element (2), and a second end of the fluid channel is connected with a cooling system.

7. A pyrolysis reactor according to claim 5, characterized in that the tray (1) is rotatably arranged on a feed shaft (3) extending through the tray (1), the discharge end (32) of the feed shaft being fixed relative to the holder (4).

8. A pyrolysis reactor according to claim 7, characterized in that the periphery of the feeding end (31) of the feeding shaft (3) is sleeved with a rotating shaft sleeve (13), the rotating shaft sleeve (13) freely rotates relative to the feeding shaft (3), one end surface of the rotating shaft sleeve (13) is fixedly connected with the tray body (1), and the rotating shaft sleeve (13) is provided with a rotating tooth (131).

9. A pyrolysis reactor according to claim 8, further comprising a frame (5), wherein the feeding shaft (3) is fixed on the frame (5), the feeding end (31) of the feeding shaft (3) is communicated with the outlet of the vertical screw feeder (9), the inlet of the vertical screw feeder (9) is communicated with the outlet of the horizontal screw feeder (8), and the inlet of the horizontal screw feeder (8) is provided with a hopper (81).

10. A pyrolysis reactor according to claim 8, further comprising a housing (6), wherein the housing (6) is internally provided with the fixed seat (4) and the tray body (1), the fixed seat (4) is fixedly connected with the housing (6), the tray body (1) freely rotates relative to the housing (6), a material passage is formed between the tray body (1) and the housing (6), an ash outlet is formed between the bottom of the tray body (1) and the housing (6), and an ash discharging device (7) is further arranged at the lower part of the housing (6), and the material passage is communicated with the ash discharging device (7) through the ash outlet.

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