CN114890171A

CN114890171A - Device for sealing carbon dioxide by forsterite

Info

Publication number: CN114890171A
Application number: CN202210493633.5A
Authority: CN
Inventors: 汪盛明; 祝道全; 胡莹; 余超; 董博; 邓承继; 魏建国; 程厚睿
Original assignee: Wuhan Lichan Environmental Protection Technology Co ltd
Current assignee: Wuhan Lichan Environmental Protection Technology Co ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-08-12
Anticipated expiration: 2042-05-07
Also published as: CN114890171B

Abstract

The invention discloses a forsterite carbon dioxide sealing device which comprises a sealing tank, a feeding pipe orifice, a conveying mechanism and a storage box, wherein the feeding pipe orifice is installed at the top of the sealing tank, the conveying mechanism is installed at the top of the feeding pipe orifice, the storage box is installed on the outer wall of one side, away from the sealing tank, of the conveying mechanism, a notch is formed in the outer wall of one side, close to the storage box, of the conveying mechanism, a lower sliding frame is installed on the outer wall of one side of the storage box, driving motors are installed on the outer walls of the two sides of the storage box, crushing rollers are installed at the output ends of the two groups of driving motors through shafts, the two groups of crushing rollers extend into the space of the storage box, the two groups of crushing rollers are arranged up and down, and a support box is installed at the bottom of the conveying mechanism. In the invention, the reaction rate between the forsterite and carbon dioxide can be improved by crushing the forsterite and stirring, so that the generation of a magnesium oxide compound is accelerated, and the compound transfer is convenient.

Description

Device for sealing carbon dioxide by forsterite

Technical Field

The invention relates to the technical field of carbon dioxide sequestration, in particular to a device for sequestering carbon dioxide by forsterite.

Background

Carbon dioxide is a main greenhouse gas in the atmosphere, which traps sunlight reflected from the ground, so that the global warming is forced by the high concentration of carbon dioxide in the atmosphere, resulting in floods, severe tropical storms, desertification, and enlargement of tropical regions, and the like, and the carbon dioxide in the atmosphere is mainly generated by burning fossil fuel, and a large amount of released carbon dioxide is accumulated in the atmosphere during the industrial revolution, and the increase of the quality of life of human beings also results in the accumulation of additional carbon dioxide in the atmosphere, and it is currently possible to absorb and store carbon dioxide by using mineral sequestration, which means solidification of carbon dioxide using alkaline and alkaline earth oxides such as magnesium oxide and calcium oxide, which are currently present in naturally occurring silicate rocks such as olivine and the like, and by using photosynthesis in the nature, which generates compounds such as magnesium carbonate and calcium carbonate after chemical reaction with carbon dioxide, carbon dioxide is not released to the atmosphere after carbonization and the associated risks are therefore small.

The existing device for sealing carbon dioxide has the following defects:

1. in the existing devices for sealing and storing carbon dioxide, blocky alkaline and alkaline-earth oxides are directly contacted with the carbon dioxide for reaction, wherein the carbon dioxide is only contacted with the outer surface of the blocky alkaline-earth oxide, so that the contact is insufficient, and the reaction rate is influenced;

2. in the existing device for sealing and storing carbon dioxide, most of stirring mechanisms used when alkaline earth oxide reacts with liquid carbon dioxide are integrally assembled with the device, and most of stirring rod bodies are inconvenient to disassemble, so the stirring rod bodies are inconvenient to disassemble;

3. in the existing device for sealing carbon dioxide, most of the compounds of magnesium carbonate and calcium carbonate formed by the reaction of alkaline earth oxide and liquid carbon dioxide are taken out from the top of the device when transferring, the actual operation is complicated, and the substances are transferred at a high place, so that certain dangerousness is provided.

Disclosure of Invention

The invention aims to provide a device for sequestering carbon dioxide by forsterite, which solves the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: a device for sealing carbon dioxide by forsterite comprises a sealing tank, a feeding pipe orifice, a conveying mechanism and a containing box, wherein the feeding pipe orifice is installed at the top of the sealing tank, and the conveying mechanism is installed at the top of the feeding pipe orifice;

conveying mechanism keeps away from one side outer wall of sealing up the jar and installs the containing box, one side outer wall that conveying mechanism is close to the containing box is provided with the notch, sliding frame under one side outer wall of containing box installs, driving motor is all installed to the both sides outer wall of containing box, and is two sets of driving motor's output all is installed the crushing roller through the axle, and inside two sets of crushing rollers all extended the space that gets into the containing box, two sets of the crushing roller is arranged from top to bottom, conveying mechanism's bottom is installed and is supported the case.

Preferably, the conveying mechanism is constructed by an inclined barrel, a servo motor, a partition plate, a spiral feeding rod and a bent pipe, the inclined barrel is arranged at the top of the supporting box, the partition plate is arranged in the space of the inclined barrel and located below the notch, the servo motor is arranged on the bottom wall of the inclined barrel, the spiral feeding rod is arranged on the rotating shaft of the servo motor and located in the space above the partition plate in the inclined barrel, the bent pipe is arranged at the top of the inclined barrel, and one end of the bent pipe is attached to the top of the feeding pipe opening.

Preferably, the top of sealing up the jar of depositing is installed and is rotated the motor, the bull stick is installed to the output of rotating the motor, and inside the bull stick is in the space of sealing up the jar of depositing, the surface mounting of bull stick has the square piece of arranging about the multiunit, the both sides outer wall of square piece all has the joint board, and is two sets of through the mounting screw pole is all installed to one side outer wall that the joint board is opposite.

As preferred, the bottom of the sealed jar of depositing is installed and is linked up the ring, the bottom of linking up the ring is provided with the gomphosis groove, the tank bottoms board is installed to the bottom of linking up the ring, the snap ring is installed at the top of tank bottoms board, and the surface of snap ring and the inner wall laminating in gomphosis groove, the inserted bar of arranging around two sets of is installed to one side outer wall jar of linking up the ring, and the inside of snap ring is all run through to the one end of two sets of inserted bars, the backing ring is installed to the bottom of tank bottoms board.

Preferably, the vacuum pump is installed at the top of the sealed storage tank, the input end of the vacuum pump extends into the space of the sealed storage tank, the oxygen detector is installed at the top of the sealed storage tank, and the sensing end of the oxygen detector extends into the space of the sealed storage tank.

Preferably, a pumping mechanism is arranged on the inner wall of one side of the sealing tank in a penetrating mode, and a liquid carbon dioxide tank body is arranged at the tail end of the pumping mechanism.

As preferred, the surface mounting who seals up the jar has solid fixed ring, gu fixed ring's bottom is installed the multiunit and is the support frame that the annular was arranged, the multiunit the arc bottom plate is all installed to the bottom of support frame.

Preferably, the inner walls of the two sides of the feeding pipe opening are provided with grooves, the back surface of the feeding pipe opening is provided with a plugging plate, and the front surface of the plugging plate extends into the space of the feeding pipe opening.

Compared with the prior art, the invention has the beneficial effects that:

1. in the invention, in the process of feeding the forsterite into the space of the storage box, a worker can drive the two groups of crushing rollers to rotate in opposite directions through the operation of the two groups of driving motors so as to crush blocky forsterite, improve the contact area between the follow-up forsterite and carbon dioxide, further improve the reaction efficiency, transmit the blocky forsterite into the space of the conveying mechanism through the notch, and guide the forsterite fragments into the sealed storage tank by matching with the conveying mechanism.

2. According to the invention, after the forsterite fragments and the liquid carbon dioxide are both led into the sealing tank, the output shaft of the rotating motor is driven to drive the rotating rod to rotate according to the set rotating speed by operating the rotating motor, and then the round rod connected with the square block through the connecting plate can rotate along with the rotating motor so as to stir the forsterite fragments and the liquid carbon dioxide and drive the forsterite fragments and the liquid carbon dioxide to be fully contacted so as to improve the reaction efficiency and effect.

3. According to the invention, the storage tank and the tank bottom plate are detachable, wherein when magnesium carbonate substances formed after the forsterite fragments react with liquid carbon dioxide need to be taken out, a worker places a supporting part at the bottom of the backing ring, then separates two groups of inserted rods from contact with the connecting ring, and then transfers the reaction substances in the tank bottom plate space.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the conveying mechanism of the present invention;

FIG. 3 is a schematic view of the mounting structure of the storage box, the lower slide frame and the inclined cylinder according to the present invention;

FIG. 4 is a schematic view of the storage box, the driving motor and the crushing roller of the present invention;

FIG. 5 is a schematic view of the installation structure of the rotary rods, the square blocks and the connecting plates according to the present invention;

FIG. 6 is a schematic view of the mounting structure of the containment tank, the adapter ring and the tank bottom plate of the present invention;

FIG. 7 is a schematic view of the mounting structure of the inlet nozzle and the plugging plate according to the present invention;

FIG. 8 is a schematic cross-sectional view of the sealing can of the present invention.

In the figure: 1. sealing the storage tank; 2. a feed tube orifice; 3. a conveying mechanism; 4. a storage box; 5. a notch; 6. a down sliding frame; 7. a drive motor; 8. a crushing roller; 9. a support box; 10. a tilting cylinder; 11. a servo motor; 12. a partition plate; 13. a screw feed rod; 14. bending the pipe; 15. rotating the motor; 16. a rotating rod; 17. a square block; 18. a connector tile; 19. a round bar; 20. an adaptor ring; 21. a tank bottom plate; 22. clamping a ring; 23. inserting a rod; 24. a backing ring; 25. a vacuum pump is pumped; 26. an oxygen detector; 27. a pumping mechanism; 28. a liquid carbon dioxide tank; 29. a fixing ring; 30. a support frame; 31. a plugging plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-8, an embodiment of the present invention is shown:

a device for sealing carbon dioxide by forsterite comprises a sealing tank 1, a feeding pipe orifice 2, a conveying mechanism 3 and a containing box 4, wherein the feeding pipe orifice 2 is installed at the top of the sealing tank 1, and the conveying mechanism 3 is installed at the top of the feeding pipe orifice 2;

the inside of the sealing tank 1 has a large space, which provides a reaction space for liquid carbon dioxide and forsterite, the feeding pipe opening 2 is used for communicating the conveying mechanism 3 and the sealing tank 1, the conveying mechanism 3 is used for upwards conveying the substances in the containing box 4 to the position of the feeding pipe opening 2, and then the substances fall into the space of the sealing tank 1.

Conveying mechanism 3 keeps away from one side outer wall of sealing up jar 1 and installs containing box 4, one side outer wall that conveying mechanism 3 is close to containing box 4 is provided with notch 5, one side outer wall of containing box 4 is installed and is slided frame 6 down, driving motor 7 is all installed to containing box 4's both sides outer wall, crushing roller 8 is all installed through the axle to two sets of driving motor 7's output, and inside two sets of crushing roller 8 all extended the space that gets into containing box 4, two sets of crushing roller 8 were arranged from top to bottom, supporting box 9 is installed to conveying mechanism 3's bottom.

Containing box 4 is used for placing the forsterite that does not carry out crushing treatment, wherein the down sliding frame 6 is the same with conveying mechanism 3's inclination, the staff sends into the in-process of forsterite toward containing box 4's space, if the forsterite drops on the diapire of down sliding frame 6, it can slide to containing box 4's space inside automatically, notch 5 sets up and provides the passageway to containing box 4 inside material gliding to conveying mechanism 3, through two sets of driving motor 7's operation, drive two sets of crushing roller 8 simultaneously and rotate, and two sets of crushing roller 8's rotation opposite direction, so that carry out crushing treatment with blocky forsterite, then transmit to conveying mechanism 3's space inside through notch 5, wherein support box 9 possesses the storage nature, it provides comparatively stable holding power for conveying mechanism 3 simultaneously.

The conveying mechanism 3 is constructed by an inclined barrel 10, a servo motor 11, a partition plate 12, a spiral feeding rod 13 and a bent pipe 14, the inclined barrel 10 is installed at the top of the supporting box 9, the partition plate 12 is installed inside the space of the inclined barrel 10, the partition plate 12 is located below the notch 5, the servo motor 11 is installed on the bottom wall of the inclined barrel 10, the spiral feeding rod 13 is installed on the rotating shaft of the servo motor 11, the spiral feeding rod 13 is located in the space above the partition plate 12 in the inclined barrel 10, the bent pipe 14 is installed at the top of the inclined barrel 10, and one end of the bent pipe 14 is attached to the top of the feeding pipe opening 2.

Wherein division board 12 is used for cutting apart the inner space of an inclined cylinder 10 to receive the interference of forsterite when servo motor 11 in the space below moves, servo motor 11 starts the back, can rotate towards setting for the direction, then drives screw feeding rod 13 and follows the rotation, so that will follow the leading-in forsterite crushed aggregates upwards of containing box 4 space inside and carry, later transmit to feed pipe mouth 2 department via return bend 14.

The top of the sealing and storing tank 1 is provided with a rotating motor 15, the output end of the rotating motor 15 is provided with a rotating rod 16, the rotating rod 16 is positioned in the space of the sealing and storing tank 1, the outer surface of the rotating rod 16 is provided with a plurality of groups of square blocks 17 which are arranged up and down, the outer walls of two sides of each square block 17 are provided with connecting plates 18 through screws, and the outer wall of one side of each of the two groups of connecting plates 18 which are opposite is provided with a round rod 19.

After the rotating motor 15 starts, its output shaft can drive the bull stick 16 and carry out rotatory operation according to setting for the rotational speed, then can follow the rotation via the round bar 19 that the link up fishplate bar 18 is connected with square piece 17, so that mix forsterite fragment and liquid carbon dioxide, make the two fully contact, so that improve reaction efficiency and effect, wherein be in fixed connection's state between square piece 17 and the bull stick 16, its 16 surface of multiplicable bull stick is used for installing the area of link up fishplate bar 18, adopt the screw connection between link up fishplate bar 18 and the square piece 17 simultaneously, it possesses detachability, then conveniently change round bar 19.

The bottom of sealing jar 1 is installed and is linked up ring 20, and the bottom of linking ring 20 is provided with the gomphosis groove, and tank bottoms board 21 is installed to the bottom of linking ring 20, and snap ring 22 is installed at the top of tank bottoms board 21, and the surface of snap ring 22 and the inner wall laminating in gomphosis groove, and two sets of inserted bars 23 of arranging around are installed to one side outer wall jar of linking ring 20, and the inside of snap ring 22 is all run through to the one end of two sets of inserted bars 23, and backing ring 24 is installed to the bottom of tank bottoms board 21.

The connection ring 20 and the sealed storage tank 1 are fixedly connected, when the connection ring is combined with the tank bottom plate 21, the tank bottom plate 21 needs to be arranged under the connection ring 20, upward driving force is applied to the connection ring, the clamping ring 22 is arranged in a space of the clamping groove, the inserted rods 23 are inserted into groove holes formed in the clamping ring 22 and the connection ring 20, then the locking is carried out through nuts, a set of complete tank body structure can be formed between the tank bottom plate 21 and the sealed storage tank 1 at the moment, the phenomenon that substances in the complete tank body structure fall off cannot occur, when magnesium carbonate substances formed after reaction of forsterite fragments and liquid carbon dioxide need to be taken out, a worker places a supporting component at the bottom of the backing ring 24, then the two sets of inserted rods 23 are separated from the connection ring 20, and then the reaction substances in the space of the tank bottom plate 21 are transferred.

The evacuation pump 25 is installed at the top of the sealed tank 1, and the input end of the evacuation pump 25 extends into the space of the sealed tank 1, the oxygen detector 26 is installed at the top of the sealed tank 1, and the induction end of the oxygen detector 26 extends into the space of the sealed tank 1.

When the forsterite fragments are led into the space of the sealed storage tank 1 and liquid carbon dioxide is not led in, the vacuum pumping pump 25 is started to pump air in the space of the sealed storage tank 1 through the liquid carbon dioxide, the oxygen content in the space of the sealed storage tank 1 is monitored in real time by matching with the oxygen detector 26, and when the oxygen content is close to zero, the vacuum pumping pump 25 stops working.

The inner wall of one side of the sealed tank 1 is provided with a pumping mechanism 27 in a penetrating way, and the tail end of the pumping mechanism 27 is provided with a liquid carbon dioxide tank body 28.

When the space of the storage tank 1 is close to vacuum, the pumping mechanism 27 introduces the liquid carbon dioxide in the liquid carbon dioxide tank 28 into the space of the storage tank 1 to mix with the forsterite fragments.

The outer surface mounting of the sealing tank 1 has a fixed ring 29, the bottom of the fixed ring 29 is provided with a plurality of groups of support frames 30 which are arranged in an annular manner, the bottom of each group of support frames 30 is provided with an arc-shaped bottom plate, the inner walls of the two sides of the feeding pipe opening 2 are provided with grooves, the back surface mounting of the feeding pipe opening 2 is provided with a sealing plate 31, and the front surface of the sealing plate 31 extends into the space of the feeding pipe opening 2.

The fixed ring 29 provides a relatively sufficient installation site for the support frame 30, the arc-shaped bottom plate increases the contact area between the bottom of the support frame 30 and the bottom surface, the stability of the device is further improved, the non-fixed laminating state is arranged between the blocking plate 31 and the feeding pipe opening 2, and the blocking and dredging states of the feeding pipe opening 2 can be controlled through the blocking plate.

The working principle is as follows: the staff sends into forsterite toward the space of containing box 4, and start two sets of driving motor 7, make it drive two sets of crushing rollers 8 and rotate towards opposite direction, so that carry out crushing treatment with blocky forsterite, then transmit to the space of slope section of thick bamboo 10 inside through notch 5, later start servo motor 11, for drive spiral feed rod 13 orientation settlement direction rotation, so that will follow leading-in forsterite crushed aggregates inside the containing box 4 space and upwards carry, later via return bend 14, in the space of sealing jar 1 is sent into to feeding pipe mouth 2, then start evacuation pump 25, through its inside air of extraction sealing jar 1 space, and cooperate oxygen detector 26 real-time supervision sealing jar 1 space inside oxygen content, when its oxygen content is close to zero, evacuation pump 25 stops working, later pumping mechanism 27 import the liquid carbon dioxide of liquid carbon dioxide jar internal 28 into the space inside of sealing jar 1 with forsterite crushed aggregates Mix to the operation of cooperation rotating motor 15 drives the bull stick 16 through its output shaft and carries out the rotation operation according to setting for the rotational speed, then can follow the rotation via the round bar 19 that links up fishplate bar 18 and square block 17 are connected, so that stir forsterite fragment and liquid carbon dioxide, make the two fully contact, so that improve reaction efficiency and effect, later break away from the contact with two sets of inserted bars 23 and linking ring 20, it can to shift the inside reaction material in tank bottom plate 21 space.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a device of carbon dioxide is sealed up to forsterite, includes that sealed up jar (1), feeding pipe mouth (2), conveying mechanism (3) and containing box (4), its characterized in that: a feeding pipe orifice (2) is installed at the top of the sealing tank (1), and a conveying mechanism (3) is installed at the top of the feeding pipe orifice (2);

conveying mechanism (3) are kept away from one side outer wall of sealing up and are deposited jar (1) and install containing box (4), one side outer wall that conveying mechanism (3) are close to containing box (4) is provided with notch (5), one side outer wall of containing box (4) is installed down sliding frame (6), driving motor (7) are all installed, and are two sets of to the both sides outer wall of containing box (4) the output of driving motor (7) all is installed crushing roller (8) through the axle, and inside two sets of crushing roller (8) all extended the space that gets into containing box (4), two sets of crushing roller (8) are arranged from top to bottom, supporting box (9) are installed to the bottom of conveying mechanism (3).

2. The apparatus for sequestering carbon dioxide as recited in claim 1, wherein: conveying mechanism (3) construct for slope section of thick bamboo (10), servo motor (11), division board (12), screw feeding rod (13) and return bend (14), the top at supporting box (9) is installed in slope section of thick bamboo (10), division board (12) are installed inside the space of a slope section of thick bamboo (10), and division board (12) are located the below of notch (5), servo motor (11) are installed on the diapire of a slope section of thick bamboo (10), screw feeding rod (13) are installed in servo motor (11)'s pivot, and screw feeding rod (13) are in the top space of a slope section of thick bamboo (10) well division board (12), return bend (14) are installed at the top of a slope section of thick bamboo (10), and the one end of return bend (14) is laminated with the top of feed pipe mouth (2).

3. The apparatus for sequestering carbon dioxide as recited in claim 1, wherein: the top of the sealing tank (1) is provided with a rotating motor (15), the output end of the rotating motor (15) is provided with a rotating rod (16), the rotating rod (16) is positioned in the space of the sealing tank (1), and the outer surface of the rotating rod (16) is provided with a plurality of groups of square blocks (17) which are arranged up and down.

4. The apparatus for sequestering carbon dioxide as recited in claim 3, wherein: the outer walls of two sides of the square block (17) are respectively provided with a connecting plate (18) through screws, and the outer walls of two opposite sides of the connecting plates (18) are respectively provided with a round rod (19).

5. The apparatus for sequestering carbon dioxide as recited in claim 1, wherein: the bottom of sealing up jar (1) is installed and is linked up ring (20), the bottom of linking up ring (20) is provided with the gomphosis groove, tank bottoms board (21) are installed to the bottom of linking up ring (20), snap-fit ring (22) are installed at the top of tank bottoms board (21), and the surface of snap-fit ring (22) and the inner wall laminating in gomphosis groove, insert bar (23) of arranging around two sets of are installed to one side outer wall jar of linking up ring (20), and the inside of snap-fit ring (22) is all run through to the one end of two sets of insert bars (23), backing ring (24) are installed to the bottom of tank bottoms board (21).

6. The apparatus for sequestering carbon dioxide as recited in claim 1, wherein: vacuum pump (25) are installed at the top of sealing jar (1), and inside the input of vacuum pump (25) extended the space that gets into sealing jar (1), oxygen detector (26) are installed at the top of sealing jar (1), and inside the induction end of oxygen detector (26) extended the space that gets into sealing jar (1).

7. The apparatus for sequestering carbon dioxide as recited in claim 1, wherein: the inner wall of one side of the sealing tank (1) is provided with a pumping mechanism (27) in a penetrating way, and the tail end of the pumping mechanism (27) is provided with a liquid carbon dioxide tank body (28).

8. The apparatus for sequestering carbon dioxide as recited in claim 1, wherein: the surface mounting who seals up and deposit jar (1) has solid fixed ring (29), the bottom of solid fixed ring (29) is installed the multiunit and is support frame (30) that the annular was arranged.

9. The apparatus for sequestering carbon dioxide as recited in claim 8, wherein: the bottom of the support frames (30) is provided with arc-shaped bottom plates.

10. The apparatus for sequestering carbon dioxide as recited in claim 1, wherein: the both sides inner wall of feed pipe mouth (2) all is provided with the recess, the back mounted of feed pipe mouth (2) has shutoff board (31), and inside the front of shutoff board (31) extended the space that gets into feed pipe mouth (2).