CN1033844C - Method for making wooden cellulose - Google Patents

Abstract

The present invention discloses a method for making wooden cellulose, which comprises the steps of crushing, drying, fine grinding and sieving. The present invention is characterized in that hardwood pulp plate granules are used as raw materials, 1 to 3% of starch and 0.1 to 0.3% of vegetable oil are added as dispersants, 0.01 to 0.03% soda is added as a hydrophilic agent, and irregular tablet granules of phi 2 to phi 16 are obtained through coarse grinding; fine grinding power is obtained after drying, sterilization and fine grinding, and the fine grinding power is packed after sieving. The wooden cellulose obtained by the method has the advantages of no poison, no taste, pure white color, uniform fiber, good dispersivity and no caking and can be used in industries, such as beer, beverages, petroleum, etc. The method also has the advantages of simple manufacturing process, continuous and automatic production, high output, etc.

Description

A kind of manufacture method of lignocellulose and equipment thereof

The present invention relates to cellulose manufacturing technology field, exactly is a kind of manufacture method and equipment thereof of lignocellulose.

In the prior art (SU1606559, SU765439), comprise that there are following shortcoming in pulverizing, drying, correct grinding and the manufacture method of sieving and equipment when being used to make lignocellulose: the product dispersiveness is relatively poor, easily caking; Product is easy to change when dry, becomes to stick with paste, and has destroyed fibrocyte, has reduced toughness, and quality is not good enough, and correct grinding finished product material content is lower, and production efficiency is not high.

But the objective of the invention is to provide that a kind of technology is simple, stable, the lignocellulose manufacture method and the relevant device of good product quality, the big continuous automatic production of output, to overcome above-mentioned shortcoming.

Manufacture method of the present invention comprises pulverizing, drying, correct grinding and screening, it is characterized in that:

1) select materials: the wood-pulp board made from leaf wood is the manufacturing raw material of lignocellulose, add 1%～3% starch and 0.1%～0.3% vegetable oil as dispersant, 0.01%～0.03% soda to overcome electrostatic interaction, increases dispersiveness and hydrophilic interaction as hydrophilizing agent.

2) meal: adopting pulverizer that above-mentioned batch mixing is carried out meal, is irregular grain meal of φ 2～φ 16mm scope to obtain diameter, in order to dry and further correct grinding.

3) dry sterilization: the meal that obtains is added drying equipment carry out drying, make its moisture＜6%, carry out ultraviolet disinfection then.

4) correct grinding: the meal behind the dry sterilization is added correct grinding equipment finish grind, be no less than 90% correct grinding powder to obtain 80～120 purpose finished product material content.

5) screening: adopt classifying screen will finish grind in the powder granularity and sift out less than 80 purpose particles, finished product and the granularity of granularity between 80～240 orders divided grade packaged greater than 240 purpose low amounts of dust.

By the method batching of selecting materials of the present invention, the shortcoming of can overcome the product bad dispersibility, easily luming.The meal granularity is controlled in diameter phi 2～φ 16mm scope, and wherein the irregular grain of φ 2～φ 12mm should account for 80% at least, and φ 12～φ 14mm can account for 15%, and φ 14～φ 16mm can account for 5%, and is too thick, is difficult for drying, and the difficulty of correct grinding is big; Too thin, do not walk material when dry, easily on fire.Adopt about 60 * 80mm, it is can reach above-mentioned technic index fully that the wood-pulp board of thick 1.5mm carries out meal.Be dried to and carry out ultraviolet disinfection again behind moisture＜6% and can obtain sterilization effect preferably.Obtaining granularity after correct grinding, the screening is that 80～240 purpose lignocellulose products are a kind of novel filter mediums, with the diatomite compatibility, be widely used in industries such as beer, beverage, oil, medicine, add 10% cellulose and can improve beer production 40%, reduce diatomite consumption 30%, remarkable economic efficiency is arranged.Its granularity coarse filtration speed more is fast more, and permeability is high more, and " bridge formation " phenomenon is obvious, forms the porous filter medium, and different grain size purposes difference forms series of products.It is simple, stable that the present invention also has technology, can be continuously, advantage such as automated production, good product quality, output be big.

The present invention has following accompanying drawing:

Fig. 1 lignocellulose manufacture method schematic block diagram

Fig. 2 ultraviolet disinfection vibration drying tower structure schematic diagram

Fig. 3 bar type vibrating ball-mill structural representation

Below in conjunction with accompanying drawing the present invention is elaborated.

Fig. 1 is lignocellulosic manufacture method schematic block diagram. In order to make the lignocellulosic of food stage, The present invention selects leaf wood, such as poplar, linden, birch etc., and the wood-pulp board of making is raw material, with Avoid peculiar smell. In order to overcome the shortcoming of lignocellulose product caking, bad dispersibility, the present invention is by wood The weight of pulpboard, add 1～3% starch and 0.1～0.3% vegetable oil (for example soya-bean oil, rapeseed oil, The peanut wet goods) as dispersant, 0.01～0.03% soda is as hydrophilizing agent, can guarantee product Good dispersion does not lump, and suitable hydrophily is arranged. Wood-pulp board can be selected about 60 * 80mm, The plate of thick about 1.5mm also can be selected the wood pulp grain, usually the wood pulp grain be φ 3～φ 6mm not The rule round shaped grain. Adopt pulverizer to carry out meal to the batch mixing of matching, to obtain diameter as φ 2～φ Irregular grain meal of 16mm scope can be without meal when adopting the wood pulp grain for raw material, and directly To the batch mixing dry sterilization. The pulverizer that can select has beater disintegrating machine, squirrel-cage crusher, Yao Family name's pulverizers etc., its pulverization cylinder and crushing part all should adopt stainless steel to make, its sieve bottom outlet degree should with The sheet grain meal of φ 2～φ 16mm is suitable. Dry sterilization is an important step among the present invention, Available drying equipment has drying tower, drying box, hothouse etc., pneumatic conveying drying, electrothermal drying, coal The dry way such as heated drying all can adopt. The present invention has adopted dry and sterilization is finished in same operation Method, and provided corresponding equipment---ultraviolet sterilizing vibration drying tower, it can have three layers, Four layers or five layers of drying tower layer. For five layers drying tower, the ground floor temperature is 80C, and the second layer is 50 ℃, the 3rd layer is 20～30 ℃, the 4th layer of room temperature, layer 5 room temperature, ultraviolet disinfection. Sterilization Operation can be placed on arbitrary position of whole manufacturing process in principle, but the closer to the lignocellulosic finished product Operation, sterilization effect are more good. Dried meal is added correct grinding equipment, finish grind, to obtain 80～120 purpose finished product material content are no less than 90% correct grinding powder. Correct grinding equipment can adopt vibromill, ball Grinding machine etc., the present invention has provided a kind of bar type vibratom, can satisfy the requirement of fine grinding technology of the present invention, Compare with the abrading-ball medium, output increased is more than 30%, lead content 0.23mg/kg, arsenic content 0.07mg/ Kg, iron content 0.03% all meets the requirement of food grade products. Sieve behind the correct grinding, adopt and divide The level sieve sifts out back machine with granularity in the abrasive dust less than 80 purpose particles, the one-tenth of granularity between 80～240 orders Product and granularity are divided grade packaged greater than a small amount of dust of 240 purposes. Available equipment have three grades of classifying screens and Circle line vibration separation screen.

Product fiber of the present invention is even, color and luster is pure white, nonpoisonous and tasteless, good hygroscopicity, high adsorption capacity, fully in the filtering suspension greater than 0.3 micron foreign particle, its important technological parameters is as follows: whiteness 79.9, fibre diameter 10～50 μ m, length 15～300 μ m, fiber content 99.7%, bulk density 0.218g/cm³, filtering velocity 8.1Se/l, wet density 17.36ib/st, permeability 11.88Darcy, Hold back smallest particles 0.3 μ m.

In order to finish preferably the requirement of dry sterilization technology, the present invention has provided a kind of ultraviolet disinfection Vibration drying tower, its structure is referring to Fig. 2. Two eccentric motors 1 intersections are placed on the drying tower bottom. Extremely Few three layers of drying tower layer 2 are stacked together up and down and are installed on the workbench 11, and workbench 11 passes through bullet Spring 12 is installed on the base 13, and top drying tower layer is equipped with infrared drying pipe 4, and this can be with existing There is the design of technology identical, but ultraviolet disinfection pipe 8 is housed, ultraviolet in the basecoat drying tower layer Pipe 8 can adopt known annular pipe, also can adopt the coiled pipe of special making, will with clamp It is installed in the bottom of a tower layer, and its ultraviolet ray is evenly distributed, and the sterilization ability is stronger. Material is logical The time that crosses five layers of tower layer 2 is about 13 fens, and material can be dried to water content less than 6%, and do not stick with paste, Nondiscolouring, sterilization. The charging aperture of existing grain, each layer of feed vibration drying tower is a circular hole, for The fine size of wood fibre and so on and loose material are not easy to make it to be evenly distributed. For this reason, the present invention The slot that charging aperture on the drying tower layer 2 is designed to be disposed radially, at eccentric motor 1 Drive lower whole drying tower and all be among the continuous vibration, material is from the rectangular shaped feed hole of last layer Fall, radially be evenly distributed in lower one deck drying tower layer, because vibration makes its inverse time equably Pin rotary moving left on the drying tower layer falls into again lower one deck drying tower layer after arriving charging hole, on The discharging opening of one deck is exactly the charging aperture of lower one deck, and is last, sends from the discharging opening of basecoat.

Below be a kind of embodiment of three layers of drying tower layer: 92 ℃ of ground floor temperature, 64 ℃ of the second layers, The 3rd layer of sterilization, room temperature. Embodiment for four layers of drying tower layer: 88 ℃ of ground floors, the second layer 62 ℃, the 3rd layer 30 ℃, the 4th layer of sterilization, room temperature. Scheme for five layers: 80 ℃ of ground floors, 50 ℃ of the second layers, the 3rd layer 20～30 ℃, the 4th layer of room temperature, layer 5 sterilization, room temperature. Every layer of row About 6 meters of journey.

Because lignocellulosic is more open, easy variable color during oven dry, the roasting paste, even burning, so The present invention all offers peep hole 9 on the periphery 3 of each drying tower layer, each peep hole 9 is interior all to be established Temperature switch 5 is arranged, and every layer temperature switch 5 links with temperature-controlling cabinet 6 respectively, can be to each drying tower layer Temperature is regulated respectively, is controlled, to guarantee the quality of dried material. Temperature-controlling cabinet can be by known technology Design, temperature switch can be selected known products, and the optional mercurial thermometer point-touch switch of using for example can Easily the operating temperature of drying tower layer 2 is regulated, is controlled.

For the requirement of finishing fine grinding technology and increase work efficiency, the present invention has provided a kind of bar type and has shaken Grinding machine.

Fig. 3 is its structural representation, and it is a kind of improvement to existing vibrating ball-mill, comprises motor 21, inclined to one side Concentric mechanism 22, gripper shoe 17, spring 23, cooling jacket 14, working chamber 15 and sealing plate 18, this Invention adopts two working chambers 15 to be connected in series up and down, and upper and lower working chamber 15 is respectively equipped with charging aperture 19 Hes Discharging opening 20, the two ends of working chamber 15 are by sealing plate 18 sealings, and working chamber 15 is by 17 of gripper shoes Below the support, gripper shoe 17 vibrating spring 23 is housed, spring 23 can be installed in workbench 24 or ground On the face. There is cooling jacket 14 outside of working chamber 15, in order to avoid excess Temperature during ground material. Motor 21 Drive working chamber 15 through eccentric stiffener 22 and move up and down, shake up and down because the effect of spring 23 produces Moving, material, the collision effect that grinds between parts, the working chamber wall are milled to desired particle size with material. For Unlikely contaminated material during the material of size degradation level, make its requirement of satisfying food stage, worker of the present invention The inwall of doing chamber 15 is provided with stainless steel lining 16, and the stainless steel bar by different-diameter is housed in the lining 16 The dielectric rod 7 that forms. Adopt stainless steel bar to be easy to processing as grinding parts, contaminated material is not wear-resisting Performance is good, and can improve output.

Below be a bar type vibrating ball-mill embodiment who is used to produce lignocellulose:

The former internal diameter φ of working chamber 300mm, adding stainless steel lining internal diameter is φ 280mm, for the granularity that obtains as much as possible is 80～120 purpose products, adds 70 dielectric rods altogether, its diameter is respectively φ 16, φ 18, φ 20, φ 22mm, proportion is respectively 1/6 ,/2,1/6,1/6.Stainless steel bar accounts for 60% of working chamber volume, and proportion is 50% when adopting cast-iron grinding ball.According to design of the present utility model, in the material after grinding, granularity is that the ratio of 80～120 purpose lignocelluloses in total material can be up to more than 90%.Standard-required iron content≤0.04%, actual content is 0.03%, meets standard-required.The finished product of resulting granularity between 80～240 orders divides three grades of finished bags of packing into, and wherein 80～100 orders are one-level, and 100～120 orders are one-level, and 120～240 orders are one-level.

Claims (4)

1. the manufacture method of a lignocellulose comprises pulverizing, drying, correct grinding and screening, it is characterized in that:

1) select materials: the wood-pulp board made from leaf wood is the manufacturing raw material of lignocellulose, adds 1～3% starch and 0.1～0.3%, and vegetable oil is as dispersant, and 0.01～0.03% soda is as hydrophilizing agent,

2) meal: adopting pulverizer that above-mentioned batch mixing is carried out meal, is irregular grain meal of φ 2～φ 16mm scope to obtain diameter,

3) dry sterilization: the meal that obtains is added drying equipment carry out drying, make its moisture＜6%, carry out ultraviolet disinfection then,

4) correct grinding: the meal behind the dry sterilization is added correct grinding equipment finish grind, be no less than 90% correct grinding powder to obtain 80～120 purpose finished product material content,

5) screening: adopt classifying screen will finish grind in the powder granularity and sift out less than 80 purpose particles, granularity between 80～240 orders finished product and granularity greater than 240 purpose low amounts of dust, divide grade packaged.

2. lignocellulose manufacture method as claimed in claim 1 is characterized in that in the said meal, and the irregular slice grain shared ratio of diameter between φ 2～φ 12mm is no less than 80%.

3. as the lignocellulose manufacture method of claim 1 or 2, it is characterized in that the finished product of granularity between 80～240 orders divides three grades of finished bags of packing into, wherein 80～100 orders are one-level, and 100～120 orders are one-level, and 120～240 orders are one-level.

4. the equipment that is used for the described lignocellulose manufacture method of claim 1, comprise pulverizer, drying tower, vibrating ball-mill and classifying screen, it is characterized in that said drying tower is to comprise eccentric motor (1), base (13), spring (12), drying tube (4), temperature detect switch (TDS) (5), the vibration drying tower of temperature-controlling cabinet (6) and five drying tower layers (2), 80 ℃ of drying tower ground floor temperature, 50 ℃ of the second layers, the 3rd layer 20～30 ℃, the 4th layer of room temperature, the layer 5 room temperature, ultraviolet disinfection, said vibrating ball-mill is to comprise motor (21), eccentric stiffener (22), gripper shoe (17), spring (23), cooling jacket (14), working chamber (15), the bar type vibrating ball-mill of sealing plate (18) and crushing part, the inwall of working chamber (15) is provided with stainless steel lining (16), and said crushing part is the stainless steel bar (7) that is contained in the different-diameter in the lining (16).

Images