CN213463011U - Three-stage straw crushing system - Google Patents

Abstract

The utility model provides a three-stage straw crushing system, which relates to the technical field of biogas engineering and comprises a first-stage double-shaft double-roller crushing device, a second-stage flail knife crushing device and a three-stage pipeline fine crushing device; the secondary flail knife crushing device comprises a secondary shell, a secondary rotating shaft is rotatably arranged in the secondary shell, a plurality of spaced shaft discs are fixedly arranged on the secondary rotating shaft, a flail knife is arranged between every two adjacent shaft discs, a connecting knife rod parallel to the secondary rotating shaft penetrates through the eccentric positions of the shaft discs, and the connecting knife rod penetrates through one end of the flail knife; the tertiary pipeline fine crushing device is positioned at the downstream of the secondary flail knife crushing device and comprises a tertiary casing, a cutting screen is arranged in the tertiary casing, a knife rest is arranged on the surface of the cutting screen facing the feeding direction, a blade is arranged on the knife rest, and the blade is in surface contact with the cutting screen. Through three-stage crushing, the straw bag is crushed to particles with the length less than 1cm, so that the straw bag is in full contact with the fermentation flora, and the gas production efficiency of the straw is fully exerted.

Description

Three-stage straw crushing system

Technical Field

The utility model relates to a marsh gas engineering technical field especially relates to a tertiary broken system of straw.

Background

At present, along with the gradual importance of the national work of harmless and resource utilization of agricultural and forestry wastes (straws, livestock and poultry manure and the like), the biogas anaerobic fermentation engineering meets the rapid development period. In the implementation process of the biogas engineering, the crushing technical scheme has great influence on the fermentation gas production effect of the straws. The straw raw material often has the following problems in the process of fermenting and producing gas: the straw consumption is large, taking 4MW biogas project as an example, the annual straw consumption exceeds 5 ten thousand tons, and the requirements on the crushing amount and the reliability are high. The straw toughness is strong, and gets into crushing equipment with irregular mode, and it is very big to directly once only carry out the standard fine crushing (for example broken particle size is less than 2cm), easily causes the high fault rate of crushing equipment. Under the condition of larger crushing grain size, dry and yellow straws are difficult to be effectively mixed in the fermentation material, and the floating and crusting phenomena are easy to cause. Under the condition that the dry and yellow straws cannot realize good crushing and silk rolling effects due to the wrapping of the waxy lignin layer, organic substances cannot be in full contact with anaerobic fermentation flora, and the gas production potential is difficult to be fully exerted. And the soil-containing and impurity-containing rate of straw raw materials in partial areas is too high, which seriously influences the production and gas production.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the not enough of prior art to a tertiary broken system of straw is provided, through setting up tertiary breakage, can be favorable to taking place the abundant contact with fermentation fungus crowd with the broken granule that is less than 1cm of length of straw package, the gas efficiency is produced to full play straw.

In order to achieve the purpose, the utility model provides a three-stage straw crushing system, which comprises a one-stage double-shaft double-roller crushing device, and comprises a one-stage casing, wherein a feeding port is formed on the one-stage casing, two one-stage rotating shafts are arranged in the one-stage casing in a parallel rotating manner, and staggered one-stage crushing cutters are arranged on the two one-stage rotating shafts;

the secondary flail knife crushing device is positioned at the downstream of the primary double-shaft double-roller crushing device and comprises a secondary shell, a secondary rotating shaft is rotatably arranged in the secondary shell, a plurality of spaced shaft discs are fixedly arranged on the secondary rotating shaft, flail knives are arranged between the adjacent shaft discs, connecting knife bars parallel to the secondary rotating shaft penetrate through the eccentric positions of the shaft discs, and the connecting knife bars penetrate through one ends of the flail knives;

tertiary pipeline thin device that breaks is located second grade flail knife breaker's low reaches, including tertiary casing, feeding pump package and ejection of compact pump package are connected respectively to the relative both sides of tertiary casing level, be provided with the cutting screen in the tertiary casing, set up the thru hole of geometric shape on the cutting screen, the cutting screen is provided with the knife rest towards feeding direction surface, be provided with the blade on the knife rest, the blade contacts with cutting screen surface, tertiary casing outside is provided with the power spare, power spare drive blade is rotatory.

Furthermore, a discharge port of the primary double-shaft double-roller crushing device is communicated with an impurity removal device to remove main dust and metal impurities in the straws.

Further, the edulcoration device includes rotary drum sieve, rotary drum sieve's the outside is provided with the fan for the inside dust of suction rotary drum sieve, rotary drum sieve's the outside is provided with magnet, is used for adsorbing metallic impurity.

Furthermore, a discharge port of the secondary flail knife crushing device is communicated with a hydrolysis tank, and the hydrolysis tank contains hydrolysis bacteria for destroying the straw waxy coating layer.

The utility model provides a pair of tertiary broken system of straw through setting up tertiary breakage, can be broken to length less than 1 cm's granule with the straw package, can be favorable to taking place abundant contact with fermentation fungus crowd, full play straw gas production efficiency. And set up the edulcoration device, can effectively detach dust and metallic impurity in the straw. The straw waxy coating is damaged by putting the straw waxy coating into a hydrolysis tank, and the straw nutrient substances are primarily acidified, so that the gas production efficiency is further improved.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the following provides a detailed description of the present invention with reference to the embodiments of the present invention and the accompanying drawings.

FIG. 1 is a schematic structural view of a one-stage double-shaft double-roller crushing device in the utility model;

FIG. 2 is a schematic structural view of a secondary flail knife crushing device of the present invention;

fig. 3 is a schematic structural view of a tertiary pipeline fine breaking device of the present invention;

fig. 4 is the internal structure diagram of the middle-tertiary pipeline fine breaking device of the utility model.

The reference numerals in the drawings are explained below.

100. A first-stage double-shaft double-roller crushing device; 110. a first-stage housing; 120. a primary rotating shaft; 130. a first-stage crushing cutter; 200. a secondary flail knife crushing device; 210. a secondary housing; 220. a secondary rotating shaft; 230. a reel; 240. a flail knife; 250. connecting a cutter rod; 300. a tertiary pipeline fine breaking device; 310. a third-stage casing; 320. cutting the screen; 330. a tool holder; 340. a blade; 350 discharge pump group; 360. a feed pump group; 370. and a power part.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "front", "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

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

As shown in fig. 1-4, a three-stage straw crushing system comprises a one-stage double-shaft double-roller crushing device 100, a two-stage flail knife crushing device 200 and a three-stage pipeline fine crushing device 300. Through multistage crushing, the straw is crushed to the length of less than 1cm, so that the straw is in full contact with the fermentation flora, and the gas production efficiency of the straw is fully exerted.

In the process of harvesting, the straw raw materials are generally packaged by a packaging machine through nylon ropes, and before being put into a biogas fermentation tank, nylon bags need to be crushed. One-level biax pair roller breaker 100, including the one-level casing, seted up the pan feeding mouth on the one-level casing, parallel rotation is provided with two one-level pivots 120 in the one-level casing, is provided with crisscross one-level broken sword 130 on two one-level pivots 120. The straw raw material bag enters the first-stage double-shaft double-roller crushing device 100 from the feeding port, and the two first-stage rotating shafts 120 rotate oppositely, so that the first-stage crushing knives 130 on the two first-stage rotating shafts 120 are engaged with the crushed straw raw material bag in a staggered mode. The lengths of the nylon net rope and the crushed straws are both 9-10cm, and the nylon net rope after crushing is long, so that the nylon net rope can be conveniently picked up manually, and the nylon net rope is prevented from entering a fermentation tank to prepare for subsequent secondary crushing.

And the secondary flail knife crushing device 200 is arranged at the downstream of the primary double-shaft double-roller crushing device 100. The secondary flail knife breaker 200 includes a secondary housing 210, a secondary shaft 220 disposed within the secondary housing 210, and the secondary shaft 220 rotatably disposed within the secondary housing 210. A plurality of spaced shaft discs 230 are fixedly arranged on the second-stage rotating shaft 220, the second-stage rotating shaft 220 and the shaft discs 230 are coaxially arranged, and the distance between the adjacent shaft discs 230 is fixed. The eccentric position of the shaft disc 230 is provided with a connecting cutter bar 250 parallel to the secondary rotating shaft 220, the connecting cutter bar 250 passes through a plurality of flail cutters 240, and the flail cutters 240 and the shaft disc 230 are arranged in a staggered mode at intervals. The connecting rod 250 penetrates through one end of the flail knife 240, so that the other end of the flail knife 240 is flaked up under the driving of the connecting rod 250.

In order to improve the efficiency, three connecting cutter rods 250 may be inserted into the shaft disc 230, and a flail cutter 240 is correspondingly disposed on each connecting cutter rod 250.

The straw entering the secondary flail knife crushing device 200 is extruded and cut by the flail knife 240 in the secondary casing 210, and the straw is crushed to a length of 2-3cm in preparation for tertiary crushing.

And the tertiary pipeline fine crushing device 300 is positioned at the downstream of the secondary flail knife crushing device 200. The tertiary pipeline fine crushing device 300 comprises a tertiary casing 310, wherein the two horizontally opposite sides of the tertiary casing 310 are respectively connected with a feeding pump unit 360 and a discharging pump unit 350, straws enter the tertiary casing 310 from the feeding pump unit 360, and are discharged from the discharging pump unit 350 after crushing. A cutting screen 320 is arranged in the third-stage casing 310, the axis of the cutting screen 320 is parallel to the feeding direction, a plurality of through holes with geometric shapes are regularly formed in the cutting screen 320, and the geometric shapes of the through holes are determined according to the specific shapes of the crushed materials. The surface of the cutting screen 320 facing the feeding direction is provided with a blade holder 330, and the blade holder 330 is provided with a blade 340, and the blade 340 is in contact with the surface of the cutting screen 320. The exterior of the tertiary housing 310 is provided with a power member 370, and the power member 370 drives the blade 340 to rotate. The ground material is cut by the high speed rotation of the blade 340 and the contact of the blade 340 with the surface of the cutting screen 320.

Therefore, the straws are crushed to be less than 1cm in length through three-stage crushing, so that the straws are in full contact with the fermentation flora, and the gas production efficiency of the straws is fully exerted.

The discharge port of the primary double-shaft double-roller crushing device 100 is communicated with an impurity removal device, and dust and metal impurities in the straws are removed through the impurity removal device. Specifically, the edulcoration device includes rotary drum sieve, and rotary drum sieve's the outside is provided with the fan, and during the straw one-level broken back entered into rotary drum sieve, rotary drum sieve rotated at a high speed, made the dust in the straw fly upward to be sucked away by the fan. When the rotary drum sieve rotates at a high speed, because of centrifugal force, metal impurities can be pasted on the inner wall of the rotary drum sieve, magnets are arranged outside the rotary drum sieve, so that the metal impurities are adsorbed on the rotary drum sieve, and after dust is sucked and sucked, the straw raw materials are taken out, and then the metal impurities are taken down.

It should be noted that the core of the present technology is a three-stage crushing technology, and the impurity removing device provided in this embodiment is not an essential step of the present technology. The impurity removal device is suitable for areas or conditions with high soil and impurity content, and belongs to an optional link.

The discharge port of the secondary flail knife crushing device 200 is communicated with a hydrolysis tank, and the hydrolysis tank contains hydrolysis bacteria which can destroy the straw waxy coating layer. And (4) feeding the straw raw material subjected to secondary crushing into a hydrolysis tank, damaging the straw waxy coating layer, and primarily acidifying the straw nutrient substances. After hydrolysis, the mixture is put into a three-stage pipeline fine crushing device 300 for three-stage crushing, and after the three-stage crushing, the mixture can be directly put into an anaerobic fermentation tank for gas production and fermentation. Or put into the hydrolysis again for hydrolysis, and then put into the anaerobic fermentation tank for gas production and fermentation, thereby improving the efficiency of gas production.

In the embodiment, the straw bag can be crushed to particles with the length less than 1cm by arranging three-stage crushing, so that the straw bag can be in full contact with the fermentation flora, and the gas production efficiency of the straw is fully exerted. And set up the edulcoration device, can effectively detach dust and metallic impurity in the straw. The straw waxy coating is damaged by putting the straw waxy coating into a hydrolysis tank, and the straw nutrient substances are primarily acidified, so that the gas production efficiency is further improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (4)

1. A straw three-stage crushing system is characterized by comprising

The primary double-shaft double-roller crushing device comprises a primary shell, wherein a feeding port is formed in the primary shell, two primary rotating shafts are arranged in the primary shell in a parallel rotating mode, and staggered primary crushing cutters are arranged on the two primary rotating shafts;

the secondary flail knife crushing device is positioned at the downstream of the primary double-shaft double-roller crushing device and comprises a secondary shell, a secondary rotating shaft is rotatably arranged in the secondary shell, a plurality of spaced shaft discs are fixedly arranged on the secondary rotating shaft, flail knives are arranged between the adjacent shaft discs, connecting knife bars parallel to the secondary rotating shaft penetrate through the eccentric positions of the shaft discs, and the connecting knife bars penetrate through one ends of the flail knives;

tertiary pipeline thin device that breaks is located second grade flail knife breaker's low reaches, including tertiary casing, feeding pump package and ejection of compact pump package are connected respectively to the relative both sides of tertiary casing level, be provided with the cutting screen in the tertiary casing, set up the thru hole of geometric shape on the cutting screen, the cutting screen is provided with the knife rest towards feeding direction surface, be provided with the blade on the knife rest, the blade contacts with cutting screen surface, tertiary casing outside is provided with the power spare, power spare drive blade is rotatory.

2. The three-stage straw crushing system according to claim 1, wherein a discharge port of the one-stage double-shaft double-roller crushing device is communicated with an impurity removing device to remove main dust and metal impurities in the straw.

3. The three-stage straw crushing system according to claim 2, wherein the impurity removing device comprises a rotary drum screen, a fan is arranged on the outer side of the rotary drum screen and used for sucking dust in the rotary drum screen, and a magnet is arranged on the outer side of the rotary drum screen and used for adsorbing metal impurities.

4. The three-stage straw crushing system according to claim 1, wherein a discharge port of the two-stage flail knife crushing device is communicated with a hydrolysis tank, and the hydrolysis tank contains hydrolysis bacteria for destroying a straw waxy coating.

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