Integrated series pulping process in one biomass pulper

Abstract

The patent application provides an integrated biomass pulping machine of a series of pulping processes, the main body is a horizontal rotary operation cylinder horizontal closed bin, the both ends of the closed bin are gathered to the center, one end is gathered as a feeding interface, the other end is gathered as a discharging interface, a rotary valve is assembled at the feeding interface; the rotary valve is composed of a sealing rotary matched valve body and a valve core, a pulp conveying central inner cavity which communicates with the closed bin is arranged in the two; the valve core is provided with a lead-out port and a hidden passage which communicates with the feeding pipe arranged along the inner wall of the closed bin in the valve wall, the inner end of the valve body of the hidden passage corresponds and communicates with the first ring groove on the inner wall of the valve body; the inner wall of the closed bin is fixedly attached with a spiral belt which spirally extends from the feeding bin port to the discharging bin port. The pulping machine can complete the pulping processes such as washing, biological enzyme reaction, curing, cooking, bleaching and screening, and has the technical advantages of low liquid consumption and low energy consumption.

Description

TECHNICAL FIELD

[0001] The present patent application relates to the technical field of pulping of biomass fiber, and particularly relates to an integrated pulping device for completing a series of processes. BACKGROUND

[0002] The pulping process of biomass fiber raw materials successively includes a preparation process, washing, cooking, bleaching, screening, etc. The cooking step is completed by devices such as a steaming ball, a spiral continuous digester or a vertical cooking pot, and the bleaching step is usually completed by a pulping bleaching machine. Each pulping process requires corresponding equipment to form a pulping production line to achieve pulp production. As can be seen, due to the single function of each process equipment, the pulping production line is complex, the process flow is long, the energy consumption is large, the labor intensity is high, the labor cost is large, the labor intensity is high, the work is time-consuming and laborious, and the production conditions are poor, the pulping efficiency is low, the pulp quality is difficult to guarantee, and the production economic benefit is low.

[0003] Therefore, technical developers have developed and innovated in many aspects, and have proposed to integrate cooking and bleaching in a pulping all-in-one machine device. For example, a "high-concentration cooking and bleaching pulping all-in-one machine" disclosed in patent document CN102212978A has a main body of a horizontally placed rotatable long cylindrical closed tank. A feeding pipe is inserted into the middle of the tank, and a three-way pipe in the tank divides the feeding direction. A liquid discharge port and a filter plate covering the liquid discharge port are arranged on the opposite side of the feeding pipe. A multi-way rotary valve is installed at one end of the tank for heat source, cold source, liquid medicine or steam delivery control valve. The liquid medicine or steam delivery is directly communicated with a liquid medicine pipeline penetrating the center line of the tank. The liquid medicine pipeline is supported by a radial support rod in the tank. A stirring vertical plate is arranged on the tank wall towards the center to implement pre-soaking, cooking or bleaching of the material in the tank at different times.

[0004] The existing horizontal pulping all-in-one machine has many problems in actual operation. The multi-way rotary valve occupies one end of the tank, which facilitates the connection structure of heat source, cold source, liquid medicine, etc. to the tank, but also causes the feeding port to be arranged in the middle of the tank wall, so that the pulp mainly accumulates in the middle of the tank, and it is difficult to form uniform distribution in the whole tank, which affects the uniformity of material soaking, cooking or bleaching. The same technical problems of raw pulp, half-raw half-cooked pulp and half-black half-white pulp are likely to occur. The stirring plates near the two sides are difficult to play a role in forcibly mixing the material. The liquid medicine pipeline penetrates the center line of the tank, which simplifies the connection structure with the multi-way rotary valve, but the setting structure and support member are constantly impacted by the material during operation, which not only affects the mixing of the material with the liquid medicine, steam, etc. in the tank, but also causes the damage failure rate of the rack structure in the tank to be high, affecting the stability and reliability of the device operation. SUMMARY

[0005] The application of the patent application aims to solve the technical problems of poor equipment stability and reliability and poor pulp quality caused by the above technical defects of the existing integrated pulper, and provides an integrated biomass pulper of integrated series pulping process.

[0006] The technical scheme of the integrated biomass pulper of integrated series pulping process provided by the patent application mainly comprises the following technical content: an integrated biomass pulper of integrated series pulping process, the main body of which is a horizontally rotating cylindrical closed bin, the two ends of the closed bin are gathered towards the center, one end is gathered as a feeding interface, the other end is gathered as a discharging interface, a liquid discharge interface is arranged in the middle of the closed bin, and a sieve plate covering the liquid discharge interface is arranged in the bin.

[0007] The feeding interface is assembled with a rotary valve.

[0008] The rotary valve comprises a sealingly rotating valve body and a valve core, both of which have a pulp conveying central cavity communicating with the feeding interface of the closed bin, the valve body has an outer end interface communicating with an outer feeding pipeline, and the valve core has an outer end interface communicating with the feeding interface of the closed bin.

[0009] The valve core is provided with a hidden channel in the valve wall, the outlet of the hidden channel communicates with a material conveying pipe port arranged along the inner wall of the closed bin, the inner end of the valve body of the hidden channel communicates with the first annular groove on the inner wall of the valve body, and the valve body is provided with a first external pipe interface communicating with the first annular groove.

[0010] The inner wall of the closed bin is fixedly attached with a spiral belt spirally extending from the feeding port to the discharging port, and the belt port extends into the bin.

[0011] In one preferred option of the above overall technical scheme, the inner wall of the closed bin is fixedly attached with two or more spiral belts spirally extending from the feeding port to the discharging port at equal intervals.

[0012] In one preferred option of the above overall technical scheme, the belt port of the spiral belt is serrated.

[0013] In one preferred option of the above overall technical scheme, the spiral belt from the bin body close to the discharging port to the discharging interface is a non-serrated belt port.

[0014] In one preferred option of the above overall technical scheme, the closed bin has a sandwich layer.

[0015] The valve core is provided with axially parallel first and second hidden grooves in the valve wall, the first and second hidden grooves are respectively used as heat source delivery channel and heat source return channel, one end of the closed chamber is respectively communicated with the interlayer pipeline, and the outer end is respectively communicated with the second and third ring grooves in the inner wall of the valve body, the second and third ring grooves are respectively communicated with the heat source delivery pipe joint and the heat source return pipe joint. The heat source can also be a cold source.

[0016] One of the preferred options of the above overall technical solution is that the interlayer is provided with uniformly distributed reinforcing belts.

[0017] One of the preferred options of the above overall technical solution is that the sieve plate B covers the central angle range of 30-60° of the lower half circle of the inner wall of the chamber.

[0018] One of the preferred options of the above overall technical solution is that two or more integrated series pulping process integrated biomass pulping machines are connected in series according to the order of entry and exit, the discharge interface of the front pulping machine is connected to the heat-resistant and pressure-resistant fixed bearing to pass through the material chute, and then the outer feed pipeline of the rear pulping machine is connected in series. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a general assembly view of the present patent application.

[0020] Figure 2 It is a left view of Figure 2

[0021] Figure 3 It is an E-E cross-sectional structure view of Figure 1

[0022] Figure 4 It is a cross-sectional structure view of the rotary valve.

[0023] Figure 5 It is a B-B cross-sectional structure view of Figure 4

[0024] Figure 6 It is a multi-machine series structure view of the present patent application.

[0025] Figure 7 It is a cross-sectional structure view of the fixed bearing. DETAILED DESCRIPTION

[0026] The technical content of the integrated series pulping process integrated biomass pulping machine of the present patent application will be described in detail below, and the application technical effects thereof will be explained.

[0027] ​​​The integrated biomass pulping machine of the integrated series pulping process is an integrated device that can implement pulping processes such as washing, impregnation, cooking, washing, bleaching, and re-washing in time periods. The main body is a horizontal rotary cylinder closed bin 1 horizontally supported on two outer rolling bearings 150, and the bearing ring 50 is provided with a limiting roller 151 on both sides. The outer gear 40 on the closed bin 1 is driven by a reduction motor through a pinion to alternately rotate forward or reverse, ensuring stable and reliable operation. The two ends of the closed bin 1 are conically converging towards the center, one end converging into a feeding interface 11, and the other end converging into a discharging interface 22. A liquid discharge interface 80 is provided in the middle of the closed bin 1, and a sieve plate B covering the liquid discharge interface 80 is provided in the bin. The sieve plate B covers the central angle range of 30-60° of the lower half of the inner wall of the bin.

[0028] In this embodiment, the closed bin 1 has a spiral belt 13 fixedly attached to the inner wall, spiraling from the feeding bin opening M to the discharging bin opening N, with a sawtooth-shaped port extending into the bin.

[0029] In this embodiment, the closed bin 1 has two or more spiral belts 13 fixedly attached to the inner wall at equal intervals, spiraling from the feeding bin opening M to the discharging bin opening N, with a port extending into the bin.

[0030] The closed bin 1 is provided with a material conveying pipe 15 fixedly attached along the inner wall and extending through the bin body to the feeding interface 11. The material conveying pipe 15 is uniformly provided with material conveying holes.

[0031] The feeding interface 11 is equipped with a rotary valve for controlling the delivery of heat sources, steam, chemicals, cleaning water, and oxygen required by the closed bin 1. It consists of a sealing rotary valve body 121 and a valve core 122, as shown in Figure 4 , Figure 5 The valve body 121 has a central inner cavity for pulp delivery that communicates with the feeding interface 11 of the closed bin 1. The valve body 121 has an outer end interface 124 that communicates with the outer feeding pipeline. The valve core 122 has an outer end interface 128 that communicates with the feeding interface 11 of the closed bin 1.

[0032] The valve core 122 is provided with a hidden passage 125 in the valve wall. The outlet of the hidden passage 125 corresponds to the port of the material conveying pipe 15 in the closed bin 1. One end of the hidden passage 125 in the valve body 121 corresponds to the first ring groove 145 on the inner wall of the valve body 121. The valve body 121 is provided with a first outer pipe interface 27 that communicates with the first ring groove 145 for controlling the delivery of various chemicals, oxygen, and cleaning water to the closed bin 1.

[0033] The closed bin 1, which mainly performs the aging and washing processes, can be a single-walled bin.

[0034] The closed bin 1 has a sandwich A. The sandwich A is used to pass into the heat source or cold source, such as steam or heat conducting oil, to provide the required temperature process conditions for immersion, cooking or bleaching, temperature reduction and discharge. The heat source described below also includes the cold source.

[0035] The sandwich A is provided with uniformly distributed reinforcing belts 10 to improve the mechanical strength of the sandwich A.

[0036] The valve core 122 is further provided with axially parallel first and second hidden trenches 123 and 129 in the valve wall, which are respectively used as heat source conveying channels and heat source return channels between the valve body 121 and the closed bin 1, one end of which is respectively connected to the sandwich A through the pipe joints 126 and 127, the intermediate connecting pipes 30 and 29, and the valve body 121, one end of which is respectively communicated with the second and third ring grooves 146 and 147 in the valve body inner wall, and the second and third ring grooves 146 and 147 are respectively connected to the heat source external pipeline through the heat source conveying pipe joint 31 and the heat source return pipe joint 18. Among them, the heat source can also be a cold source.

[0037] After the material is prepared, it enters the closed bin 1 in operation through the rotary valve, and is fully mixed and uniformly distributed in the closed bin 1 under the action of the spiral belt 13 and the sawtooth belt port, while the material is torn and transported. The liquor, oxygen, washing water, heat source or cold source are controlled by the rotary valve and enter the closed bin 1, fully mix or contact with the material, complete the pulping process such as washing, biological enzyme reaction, curing, cooking, bleaching and screening, and the finished pulp is discharged at normal pressure. The sandwich can make the temperature in the bin quickly and accurately follow the process temperature control, and the spiral belt 13 can also complete efficient mixing with the liquor for semi-dry high-concentration pulp, so as to easily achieve the physical indicators of finished pulp, with the technical advantages of less liquor consumption and low energy consumption.

[0038] Two or more integrated series of pulping process are connected in series according to the order of entry and exit, and the discharge interface of the front pulping machine is connected to the material passing chute 26 through the heat-resistant and pressure-resistant fixed and rotating bearing 23, and then in the outer feeding pipeline of the rear pulping machine in series, for implementing the pulping production of semi-dry super high-concentration pulp.

[0039] An embodiment structure of the fixed and rotating bearing 23 is shown in Figure 7 The fixed and rotating bearing 23 is composed of a sealing rotating inner tube 231 and an outer sleeve 232, the inner tube 231 is connected to the discharge interface 22 of the front pulping machine, and the outer sleeve 232 is fixedly connected to the material passing chute 26.

[0040] The number of series connection sections can be set according to the pulp variety, production process, pulp standard and production capacity, and a refining device is added after the discharge of each section to implement beating, refining, defibration and tearing functions, and then the pulp is transported to the next section. After the biomass material is fed into the first section of the pulper, it is torn, stirred and propelled by the sawtooth spiral belt, and at the same time, the biological enzyme complex reagent is injected and reacted by the rotary valve, and the heat source is fed into the interlayer. Under the conditions of precise temperature control and suitable moisture content, the cellulase, hemicellulase and ligninase complex enzymatic hydrolysis reaction is carried out, and after catalysis, mixing, stirring and softening of the pulp, the pulp is transported to the second section of the pulper. The softening agent is injected by the second rotary valve, and the heat source is provided by the interlayer. Under the tearing and stirring action of the sawtooth spiral belt, the cellulose, hemicellulose and lignin of the straw are continuously reacted to promote the chain breaking and decomposition of the straw, and after the pulp is cooked, it is discharged. It is divided into two ways, one of which is used to produce the original color pulp, and the beating and refining devices are added, and finally the finished product of the original color pulp is obtained. The other is used to produce bleached pulp, which is fed into the extrusion and tearing machine by the conveying device while injecting the bleaching aid under mechanical extrusion and tearing, and then transported to the third section of the pulper. The heat source is supplied to the interlayer by the third rotary valve to ensure that the pulp is continuously heated. Under the tearing and stirring action of the sawtooth spiral belt, the super-high concentration pulp is heated and the liquid immersion is mixed uniformly to ensure that the bleaching reaction is uniform, complete and efficient. The bleaching end pulp is transported to the discharge end and discharged by the spiral belt.

Claims

1. An integrated series pulping process of a biomass pulper, the main body is a horizontal rotary cylinder horizontal closed bin (1), the closed bin (1) has a sandwich (A); the two ends of the closed bin (1) are drawn to the center, one drawn end is provided with a rotary valve, the other drawn end is a discharge interface (22), the middle of the closed bin (1) is provided with a liquid discharge interface (80), and a sieve plate (B) covering the liquid discharge interface is arranged in the bin; The rotary valve comprises a sealingly rotatably matched valve body (121) and a valve core (122); Characterized in that, The valve body (121) and the valve core (122) have a slurry conveying central inner cavity communicated with the closed bin feed interface (11), the valve body (121) has an outer end interface (124) communicated with an outer feed pipeline, and the valve core (122) has an inner end interface (128) communicated with the closed bin feed interface (11); The valve core (122) is provided with a hidden passage (125) in the valve wall, an outlet of the hidden passage (125) is communicated with a feed pipe (15) port arranged along the inner wall of the closed bin (1), and the hidden passage (125) is correspondingly communicated with a first ring groove (145) on the inner wall of the valve body (121) at the inner end of the valve body, and the valve body (121) is provided with a first outer connecting pipe interface (27) having an inner end communicated with the first ring groove (145); The valve core (122) is further provided with axially parallel first and second hidden grooves (123) and (129) in the valve wall, the first and second hidden grooves (123) and (129) are respectively used as a heat source conveying passage and a heat source returning passage, one end of each of the first and second hidden grooves (123) and (129) is connected to the sandwich (A) through pipe joints (126) and (127) and intermediate connecting pipes (30) and (29), and the other end of each of the first and second hidden grooves (123) and (129) is correspondingly communicated with a second ring groove (146) and a third ring groove (147) on the inner wall of the valve body, and the second and third ring grooves (146) and (147) are respectively communicated with a heat source conveying pipe joint (31) and a heat source returning pipe joint (28); The closed bin (1) is fixedly attached with a spiral belt (13) extending into the bin from the feed bin port (M) to the discharge bin port (N) on the inner wall of the bin; The spiral belt (13) has a sawtooth-shaped belt port with a height of 200-500 mm; A non-sawtooth belt port spiral belt (13) is arranged from the bin body near the discharge bin port (N) to the discharge interface (22); The discharge interface (22) is provided with a heat-resistant and pressure-resistant fixed and rotating bearing (23); The fixed and rotating bearing (23) is composed of a sealingly rotatably matched inner pipe (231) and an outer sleeve (232), the inner pipe (231) is connected to the discharge interface (22), and the outer sleeve (232) is fixedly connected to the material passing chute (26).

2. The integrated series pulping process one-piece biomass pulper of claim 1, wherein, The closed bin (1) is fixedly attached with two or more spiral belts (13) on the inner wall of the bin at equal intervals from the feed bin port to the discharge bin port.

3. The integrated series pulping process's integrated biomass pulper of claim 1, wherein, The sandwich (A) is provided with uniformly distributed reinforcing belts (10).

4. The integrated series pulping process's integrated biomass pulper of claim 1, wherein, The sieve plate (B) covers the central angle range of 30-60° of the lower half circle of the bin inner wall.

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