CN101818215A - Hydrolysis method for producing xylose from bagasse - Google Patents
Hydrolysis method for producing xylose from bagasse Download PDFInfo
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- CN101818215A CN101818215A CN201010138152A CN201010138152A CN101818215A CN 101818215 A CN101818215 A CN 101818215A CN 201010138152 A CN201010138152 A CN 201010138152A CN 201010138152 A CN201010138152 A CN 201010138152A CN 101818215 A CN101818215 A CN 101818215A
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Abstract
The invention discloses a hydrolysis method for producing xylose from bagasse. The bagasse in a cane sugar factory is taken as a raw material; an indirect heating forced circulation system is adopted, in the temperature rise process, a circulating pump pumps out liquid subjected to bagasse-water separation in a hydrolysis pot, and the liquid is indirectly heated; and the liquid is returned to the pot through a distribution system so as to ensure the uniformity and completeness of heat transfer and mass transfer of each part of material in the hydrolysis pot. In the method, dialysis hydrolysis is performed first and then series hydrolysis is performed; the solid matter concentration in the hydrolysis liquid is over 4.0 percent and is improved by 20 to 25 percent than that of the traditional hydrolysis process; and the steam consumption of an evaporation system in the subsequent station is reduced by 15 to 25 percent, the energy consumption of the subsequent station is reduced, and the economic benefit is obvious.
Description
Technical field:
The present invention relates to the comprehensive utilization in the processing of farm products process, especially a kind of method for hydrolysis with producing xylose from bagasse.
Technical background:
China's wood sugar suitability for industrialized production all is to adopt chemical hydrolysis process at present, hydrolysis is the key link of xylose production, the hydrolysis yield of wood sugar has determined the wood sugar productive rate, the quality of hydrolyzed solution and concentration have determined purification and the concentrated cost and the quality product of wood sugar, and xylose production enterprise is realized that target for energy-saving and emission-reduction plays decisive role.Present domestic xylose production all is to adopt no pump circulation direct heating routine hydrolysis technology, there are several problems in existing technology: (1) dress pot coefficient is not high, generally only reach 85%, have only 80% as bagasse when more broken, thereby the top that can not guarantee pot is left enough spaces and is allowed material, water and diluted acid boiling; (2) the not enough vapor pressure that " vacation " can occur of discharging.The tensimeter demonstration has reached index, and reality does not reach, thereby the hydrolysis temperature deficiency, and the hydrolysis quality is influenced; (3) exhaust is too much.Except that waste steam, heat-up rate is slow, and the hydrolysis cycle is long; (4) the unavoidable steam that adds of open steam heating brings moisture, makes liquor ratio and actual discrepancy is arranged; (5) because liquor ratio changes, the acid concentration instability influences hydrolysis; (6) cycle long, sugared concentration is low.
Summary of the invention:
The present invention proposes a kind of method for hydrolysis with producing xylose from bagasse, and it can solve, and traditional wood sugar hydrolysis process control is unstable, the hydrolysis yield is low, plant factor is hanged down the problems such as hydrolyzed solution wood sugar content is low that reach.
This method for hydrolysis of the present invention with producing xylose from bagasse, with the cane sugar factory bagasse is raw material, adopt the indirect heating forced circulation system, recycle pump is extracted the isolating liquid of process pulp water in the hydrolyzer out and is heated indirectly during intensification, and then send back in the pot by cloth system, guarantee hydrolyzer each partly material conduct heat, the homogeneity and the thoroughness of mass transfer.
Its concrete steps are as follows:
(1), the preparation of catalyst solution: get bagasse quality 0.5～1.0% vitriol oil or 0.1～0.5% concentrated hydrochloric acid, adding water, to be mixed with concentration be 3～10% catalyst solution;
(2), charging hydrolysis: with the bagasse hydrolyzer of packing into, the bagasse volume is greater than 85% of the hydrolyzer capacity; In bagasse and catalyst solution mass ratio is that 1: 5～7 ratio adds the catalyst solution that previous step prepares suddenly in hydrolyzer, immediately hydrolyzer is heated up, keep bagasse 115～130 ℃ of hydrolysis kettle temperatures, be hydrolyzed in 90～120 minutes, to be drawn to the well heater indirect heating through the isolating liquid of pulp water in the hydrolyzer with recycle pump during hydrolysis, the liquid after the heating is sent back in the hydrolyzer by liquid distributor again; After finishing, hydrolysis utilize the interior overbottom pressure of hydrolyzer that material is discharged.
Adopt the steam indirect heating through the isolating liquid suction of pulp water well heater in the described hydrolyzer.
The present invention compared with prior art has following beneficial effect:
The present invention is raw material with the bagasse, as catalyzer, adopts pump circulation indirect heating hydrolysis process to obtain the xylose hydrolysis fluid of high density with sulfuric acid or hydrochloric acid.It has the following advantages: advance pot again behind (1) heating diluted acid, and quick heating, insulation is good; (2) shrink can back boiler for heating vapour-condensing; (3) dress pot coefficient improves, and can reach 85～95%, does not need spacing to allow material seethe; (4) outwards the emptying air-capacitor is easy to operate; That (5) reduces that bagasse with the solid-liquid ratio of hydrolysis, well realizes bagasse and hydrolyzed solution separates, makes hydrolytic process heat balance, control stabilization, has improved the hydrolysis efficiency of bagasse, reduces the energy consumption of back workshop section, has remarkable economic efficiency; (6) hydrolyzed solution quality height, acid concentration is stable; (7) cycle shortens; (8) improve the hydrolysis yield; (9) realize infiltration hydrolysis earlier, the hydrolysis of connecting again, the hydrolyzed solution solid concentration improves 20～25% greater than 4.0% than traditional hydrolysis process, the steam consumption reduction by 15～25% of back workshop section vapo(u)rization system.
Description of drawings
Fig. 1 is a technical process schematic diagram of the present invention.
Embodiment
Major equipment of the present invention comprises: the pump circulation hydrolysis system with excellent corrosion resisting performance that hydrolyzer, indirect heater, recycle pump, pulp water separator, liquid distributor are formed.
Adopt the indirect heating forced circulation system, recycle pump will be extracted out through the isolating liquid of pulp water in the hydrolyzer during intensification, utilize steam to heat indirectly, and then send back in the pot by distributor, guarantee the homogeneity and the thoroughness of each partly material heat transfer of hydrolyzer, mass transfer, thereby a pot interior material is heated up evenly, keep certain acid concentration, and liquor ratio is constant, and acid concentration is even.In addition, bagasse and catalyst solution are that 1: 5～7 low solid-liquid ratio is packed into by mass ratio, and a dress pot coefficient can reach more than 85%.Therefore, the pump circulation hydrolysis has improved hydrolyzer unit volume throughput, shortens the hydrolysis cycle, improves the concentration of solid substance (wood sugar) simultaneously, reduce the back the load of concentration and evaporation workshop section, realize energy saving purposes.
Embodiment
(1) preparation of catalyst solution
In water tank, inject a certain amount of water or rare hydrolyzed solution, add a certain amount of hydrochloric acid or sulfuric acid, be mixed with 3～10% concentration catalyst solution.
(2) charging hydrolysis
In hydrolyzer, add bagasse, the bagasse volume is greater than 85% of the hydrolyzer capacity, ratio in mass ratio 1: 5～7 adds the catalyst solution for preparing, hydrolyzer is heated up, start forced circulation pump simultaneously, open the well heater admission valve and heat, remain on 115～130 ℃, be incubated 60～90 minutes, hydrolysis finishes.
(3) discharge
After hydrolysis is finished, close forced circulation pump, close the well heater admission valve, utilize the interior overbottom pressure of hydrolyzer that material is discharged blowpit, enter down workshop section and handle.
Claims (2)
1. the method for hydrolysis with producing xylose from bagasse is a raw material with the cane sugar factory bagasse, it is characterized in that step is as follows:
(1), the preparation of catalyst solution: get bagasse quality 0.5～1.0% vitriol oil or 0.1～0.5% concentrated hydrochloric acid, adding water, to be mixed with concentration be 3～10% catalyst solution;
(2), charging hydrolysis: with the bagasse hydrolyzer of packing into, the bagasse volume is greater than 85% of the hydrolyzer capacity; In bagasse and catalyst solution mass ratio is that 1: 5～7 ratio adds the catalyst solution that previous step prepares suddenly in hydrolyzer, immediately hydrolyzer is heated up, keep bagasse 115～130 ℃ of hydrolysis kettle temperatures, be hydrolyzed in 90～120 minutes, to be drawn to the well heater indirect heating through the isolating liquid of pulp water in the hydrolyzer with recycle pump during hydrolysis, the liquid after the heating is sent back in the hydrolyzer by liquid distributor again; After finishing, hydrolysis utilize the interior overbottom pressure of hydrolyzer that material is discharged.
2. according to the described method for hydrolysis of claim 1, it is characterized in that: adopt the steam indirect heating through the isolating liquid suction of pulp water well heater in the hydrolyzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010138152A CN101818215A (en) | 2010-04-02 | 2010-04-02 | Hydrolysis method for producing xylose from bagasse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010138152A CN101818215A (en) | 2010-04-02 | 2010-04-02 | Hydrolysis method for producing xylose from bagasse |
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| CN101818215A true CN101818215A (en) | 2010-09-01 |
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| CN201010138152A Pending CN101818215A (en) | 2010-04-02 | 2010-04-02 | Hydrolysis method for producing xylose from bagasse |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677503A (en) * | 2012-05-29 | 2012-09-19 | 中国科学院过程工程研究所 | Biomass continuous hydrothermal pretreatment reactor |
| CN104878129A (en) * | 2015-04-08 | 2015-09-02 | 广东中烟工业有限责任公司 | Method for preparing tobacco xylose treating fluid by separation from bagasse, product and application of product |
| CN105146015A (en) * | 2015-07-18 | 2015-12-16 | 常州大学 | Preparation method of ready-to-eat instant xylitol |
| CN105254683A (en) * | 2015-11-06 | 2016-01-20 | 中国农业科学院饲料研究所 | Alpha-type xylooligosaccharide and preparation method and applications thereof |
| RU2643724C1 (en) * | 2017-04-06 | 2018-02-05 | Общество с ограниченной ответственностью "Петровский фарватер" | Method for processing vegetable raw material for preparation of xylose-containing hydrolysates, for producing xylitol |
| CN108559797A (en) * | 2018-06-20 | 2018-09-21 | 安阳市豫鑫木糖醇科技有限公司 | A kind of method and apparatus that xylose is extracted in the waste material from viscose fiber |
-
2010
- 2010-04-02 CN CN201010138152A patent/CN101818215A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677503A (en) * | 2012-05-29 | 2012-09-19 | 中国科学院过程工程研究所 | Biomass continuous hydrothermal pretreatment reactor |
| CN104878129A (en) * | 2015-04-08 | 2015-09-02 | 广东中烟工业有限责任公司 | Method for preparing tobacco xylose treating fluid by separation from bagasse, product and application of product |
| CN105146015A (en) * | 2015-07-18 | 2015-12-16 | 常州大学 | Preparation method of ready-to-eat instant xylitol |
| CN105254683A (en) * | 2015-11-06 | 2016-01-20 | 中国农业科学院饲料研究所 | Alpha-type xylooligosaccharide and preparation method and applications thereof |
| CN105254683B (en) * | 2015-11-06 | 2019-01-22 | 中国农业科学院饲料研究所 | α type xylo-oligosaccharide and the preparation method and application thereof |
| RU2643724C1 (en) * | 2017-04-06 | 2018-02-05 | Общество с ограниченной ответственностью "Петровский фарватер" | Method for processing vegetable raw material for preparation of xylose-containing hydrolysates, for producing xylitol |
| CN108559797A (en) * | 2018-06-20 | 2018-09-21 | 安阳市豫鑫木糖醇科技有限公司 | A kind of method and apparatus that xylose is extracted in the waste material from viscose fiber |
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Application publication date: 20100901 |