CN202881758U

CN202881758U - Cotton linter pulping system

Info

Publication number: CN202881758U
Application number: CN 201220611105
Authority: CN
Inventors: 薛润林
Original assignee: Individual
Current assignee: Hefei Yinshan Cotton & Linen Co ltd
Priority date: 2012-11-17
Filing date: 2012-11-17
Publication date: 2013-04-17
Anticipated expiration: 2022-11-17

Abstract

The utility model discloses a cotton linter pulping system. The system comprises a cotton slitter, a draught fan, a shaker, a blower, a cyclone separator, a first diffuser, a first refiner, a second refiner, a first pulp chest, a grit separator, a second pulp chest, a belt squeezer, a spiral conveyer, an alkali preparation tank, a hydrogen peroxide tank, a rotary spherical digester, a second diffuser, a bleaching machine, a third pulp chest and a pulp machine, wherein the cotton slitter is used for delivering cotton into the shaker through the draught fan; the shaker is used for delivering the cotton into the cyclone separator through the blower; the cyclone separator has a hole for exhausting air and a hole for feeding alkaline liquid; and the cotton outlet of the cyclone separator is connected into the first diffuser through a pipeline. According to the system provided by the utility model, a process in sequence of pulping and digesting can be implemented, over 80 percent of cottonseed hulls in the cotton linter, cotton boll, stem impurities and insoluble matter in sulfuric acid can be removed, so that over 80 percent of pollution load can be removed, and harmful matters can be turned into valuable matters, and a virtuous cycling role is played to the environment.

Description

The pulp-making of cotton linter system

Technical field

The utility model is specifically related to a kind of pulp-making of cotton linter system.

Background technology

In recent decades, China's pulp-making of cotton linter is all continued to use the traditional handicraft of the High Temperature High Pressure of pulling an oar after the first boiling and is produced, the cottonseed fragment in the cotton linter, cotton boll fragment, and the foreign material such as grass blade, wood chip, sulfuric acid insoluble matter all enter rotary spherical digester and process.In some sense, " rotary spherical digester has become to draw the rubbish processor ".Because impurity is many in the cotton linter, boiling is generally adopted up to the 45-55g/L high-alkalinity, and High Temperature High Pressure pulping by cooking yield is low, causes black liquor COD up to more than 100,000 Mg/L, serious dirty seven water source, contaminated environment.Be clear water blue sky, today, some local environmental administration formulated sewage discharge COD≤50Mg/L standard.COD≤50Mg/L index, making can not little paper mill up to standard, and little purified cotton factory, little chemical fibre factory stop production and change the line of production.

Summary of the invention

In order to solve above technical problem, the technical solution of the utility model is as follows:

The pulp-making of cotton linter system comprises opener, air-introduced machine, de-burring machine, pressure fan, cyclone separator, the first diffuser, the first jordan, the second jordan, the first stock tank, desander, the second stock tank, belt press, conveying worm, joins alkali groove, dioxygen tank, rotary spherical digester, the second diffuser, bleaching machine, the 3rd stock tank and pulp machine;

Opener is sent to de-burring machine by air-introduced machine with cotton, and de-burring machine is sent to cyclone separator by pressure fan with cotton;

Cyclone separator is provided with for the hole of air-discharging with for the hole that adds alkali lye;

The cotton outlet of cyclone separator is connected in the first diffuser by pipeline;

The first diffuser is connected to the inlet of the first jordan by pipeline, and the discharging opening of the first jordan is connected to the inlet of the second jordan by pipeline, and the discharging opening of the second jordan is connected in the first stock tank by pipeline;

The first stock tank is connected to the inlet of desander by pipeline, and the discharging opening of desander is connected in the second stock tank by pipeline;

The second stock tank is connected to the inlet of belt press by pipeline, and the discharging opening of belt press is connected to the inlet of conveying worm, and the discharging opening of conveying worm is connected to the inlet of rotary spherical digester;

The dioxygen tank is connected in the rotary spherical digester by pipeline and joins in the alkali groove, joins the alkali groove and is connected in the conveying worm by pipeline;

The discharging opening of rotary spherical digester is connected in the second diffuser by pipeline, and the second diffuser links to each other with the bleaching machine inlet by pipeline, and the discharging opening of bleaching machine links to each other with the 3rd stock tank, and the 3rd stock tank is connected to the inlet of pulp machine by pipeline.

Compared with prior art, the utility model has the advantage of: the system that the utility model provides has realized the rear boiling of first making beating, can remove 80% above cotton seed hulls in the cotton linter, cotton boll fragment, grass blade foreign material, the sulfuric acid insoluble matter, these foreign material not only can be removed 80% above pollutional load, can also change harmful to treasure.Boiling is to replace traditional pulping process important method after the making beating first, and environmental energy is played the benign cycle effect.

Description of drawings

Fig. 1 is traditional cotton short flannel pulping system device schematic diagram;

Fig. 2 is the utility model rear pulping by cooking system and device schematic diagram of pulling an oar first.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further details.

Pull an oar first rear decoction system of the utility model uses method of operating:

Feed intake

(1) startup pressure fan, de-burring machine, air-introduced machine, opener feed intake;

(2) start normal temperature tank pump and beat infiltration water;

(3) cotton linter mixes and stirs wetting in cyclonic separation and water;

(4) mix and stir wetting cotton linter and deliver to the first diffuser through conveying worm;

(5) end that feeds intake is driven the first diffuser circulation propeller, slurry circulation 30min;

Making beating is carried out by traditional handicraft

(1) drives the first diffuser circulation propeller, open the long fiber pump, supply water slurry to the first jordan;

(2) first jordans are to connect with the second jordan, and making beating mainly is that the fiber chopped fibres is main, prescinds and is convenient to remove sand.

Desanding is carried out by traditional handicraft.

Drive the first stock tank propeller, the slurry circulation is driven the fiber pump and is supplied water slurry to desander, carries out removal of impurities.

The belt press dehydration feeds intake

(1) drive the second stock tank propeller, the fiber pump is driven in the slurry circulation, and for water slurry, moisture through the slurry of press dewatering is 50～60%, after precipitation reuse of the water that squeezes out to belt press;

(2) slurry behind the press dewatering fills ball through conveying worm and feeds intake;

(3) open and join alkali groove alkali pump and carry alkali lye to feed intake;

(4) according to the different product requirement, press patent of invention number: 201010511566.2 content pumps into the hydrogen peroxide mixed liquor as required, on time, carry out steaming in the ball and float, coin slurry, refining cotton pulp are incubated the highest 110 ℃, 160～170 ℃ of one section insulations of chemical fiber pulp, and terminal the steaming floated temperature 80-105 ℃.

(5) cooking and heat-preservation finishes, and carries out large steam bleeding, and COD＜2000Mg/L behind the material two times is washed in batch turning.

Bleaching, the plain boiled water reuse

Drive the second diffuser propeller, the fiber pump is driven in the slurry circulation, and for white slurry, slurry carries out whiteness, DP fine setting to bleaching machine.

Papermaking, the plain boiled water reuse

Drive the 3rd stock tank propeller, the fiber pump is driven in slurry circulation, for white slurry, respectively is ferreted out coin slurry, purified cotton, chemical fiber pulp by user's needs to pulp machine.

Traditional handicraft is introduced:

(1) feeds intake: open and send machine, air-introduced machine, opener, open and join alkali groove alkali pump.After cotton linter is delivered to cyclone separator and alkali lye is mixed, through feed intake dress pot of pressafiner, conveying worm, the 40-60min that feeds intake, end feeds intake.

(2) boiling: carry out boiling by technique, after 4-5 hour, material is washed in batch turning.

(3) making beating: drive the diffuser agitator and make slurry shield ring, drive the long fiber pump to the defeated slurry of beater, pull an oar by beating process.

(4) desanding: slurry in No. 1 stock tank is transported to the EX desander and carries out the vortex removal of impurities.

(5) bleaching: the slurry in No. 2 stock tanks is passed to bleaching machine, carries out the NaOCI bleaching by technique.

(6) papermaking: the white slurry in No. 3 stock tanks, be passed to pulp machine, through the fourdrinier wire press dewatering, again through drying cylinder, produce required pulp paper.

Traditional handicraft slurrying be with high-alkali dense (45-55g/L) high temperature (170-174 ℃) high pressure (0.7-0.8MPa) with the method for chemical reaction remove cotton brachymedial grease wax, cottonseed fragment, lignin, cotton boll fragment, etc. impurity, traditional handicraft slurrying consumes high, pulping yield is low, pollutes heavy.

Decoction system has the following advantages after the first making beating that the utility model provides:

Cotton linter infiltrates when feeding intake, and the water liquor ratio is large, does not have velveteen to fly out when feeding intake, and operating environment is greatly improved, rotary spherical digester wet pulp dress pot, environment clean hygiene; First boiling after the making beating, cottonseed, large cottonseed fragment, large cotton boll fragment etc. are broken, and major part is removed, and the little fault that stays is removed easily in boiling, fault clearance＞95%; After precipitation reuse of the water that belt squeezes out, the bleaching, the reuse of papermaking plain boiled water, slurry water per ton can＜50T, save water and energy; Cotton linter soaks with the YY-02 bleeding agent, with traditional handicraft relatively save steam half; Boiling alkali concn 15-25g/L, with traditional handicraft relatively save alkali half; The low dense boiling of alkali is adopted in first boiling after the making beating, has kept saponification degreasing in the traditional handicraft, emulsification decontamination, fully destroys fiber primary wall, the chemical reactivity of secondary wall raising cellulose in alkalization, etherificate; Sewage is through the mud that the frame squeezer extrudes, and containing the organic matters such as abundant fiber fines, cottonseed fragment cotton boll fragment, lignin is kind of the good raw material of value mushroom, does farm manure, also can sell 50-100 unit/T and do boiler oil; First boiling after the making beating, fibre length is short, can spurt discharge after the boiling, spurts and discongests fiber, shortens digestion time; Boiling can utilize former traditional pulping equipment after the making beating first, and technological transformation project is few, and expense is few, instant effect.

Claims

1. pulp-making of cotton linter system, it is characterized in that, comprise opener, air-introduced machine, de-burring machine, pressure fan, cyclone separator, the first diffuser, the first jordan, the second jordan, the first stock tank, desander, the second stock tank, belt press, conveying worm, join alkali groove, dioxygen tank, rotary spherical digester, the second diffuser, bleaching machine, the 3rd stock tank and pulp machine;