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Process and apparatus for organic compound fertilizer co-produced with straw papermaking

A compound fertilizer and straw technology, applied in organic fertilizers, textiles, papermaking, applications, etc., can solve the problems of reducing the effect of impurity removal, low organic matter content, and pollution of wastewater discharge, so as to improve the effect of impurity removal and increase soil organic matter , the effect of reducing the consumption of chemical fertilizers

Active Publication Date: 2013-07-03
黄正华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Large and medium-sized papermaking enterprises concentrate, burn, and causticize waste water to recover alkali, which solves the problem of waste water discharge pollution, but burns organic matter equivalent to paper production to produce CO 2 The form is discharged into the atmosphere, and it does not meet the requirements of developing a low-carbon economy
At present, the precipitation method is also used to treat wastewater, and the filtrate is returned for reuse, so that no wastewater is discharged, but there are the following shortcomings: a. Precipitation requires reagents and liquid-solid separation, which increases costs; b. Soluble low molecular weight accounts for about 20% of straw Impurities remain in the filtrate and cannot be utilized, and the use of wet materials or liquid preparations will reduce the impurity removal effect to varying degrees
Papermaking wastewater cannot be well utilized, the key is that the wastewater contains high alkali (salt) content and low organic matter content

Method used

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  • Process and apparatus for organic compound fertilizer co-produced with straw papermaking
  • Process and apparatus for organic compound fertilizer co-produced with straw papermaking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Prepare JH0 3 and JH0 2 :

[0044] That is, according to the volume ratio of 1:1, dilute 30% hydrogen peroxide with alcohol and mix evenly; prepare 20% sodium hydroxide solution with 50% alcohol aqueous solution as solvent, and cool to room temperature; according to the volume ratio of 1:1, Slowly mix the above two solutions, cool down and separate the phases, take out the upper phase to recover the alcohol, and reuse it, the lower phase is JH0 3 . (also can prepare the sodium peroxide mixed solution JH that contains ozonated sodium according to the method that Chinese invention patent disclosure specification CN1360848A provides 3 ):

[0045] Sodium peroxide alkaline solution (JH0 2 ) Preparation: Prepare 15-40% sodium hydroxide solution with tap water, cool to room temperature, slowly add 30% hydrogen peroxide solution into it according to the volume ratio of 1:1, and obtain JH0 2 .

[0046] Straw pretreatment: Weigh two portions of the truncated wheat stra...

Embodiment 2

[0051] Take by weighing three parts of wheat straw cut short material, according to wheat straw material and JH0 3 Different proportions of JH0 were added 3 Mix well, and react under humidity at room temperature for 1 hour. Other experimental conditions are the same as in Example 1, and then steamed under the condition of 5kpa-30min. The neutral slurry is dehydrated and weighed. The results show that with JH0 3 With the increase of the addition amount, the pulp removal effect is improved, the whiteness is increased, and the pulp yield is reduced.

[0052] Wheat straw: JH0 3 Yield fiber traits 1:1.5 38.0% White, good dissociation and interweaving 1:1 45.0% Near white, good dissociation and interweaving 1:0.5 50.0% Pale yellow, generally dissociated and intertwined

Embodiment 3

[0054] Weigh three parts of wheat straw shortening material, according to wheat straw material: JH0 3 =1:0.6 ratio into JH0 respectively 3 Mix well, wet and react at room temperature for 1 hour, make a mixed slurry according to the method of Example 1, and then use steaming and pressing, steaming and cold pressing to remove impurities, remove water and waste water from the pulp, wash and dry it, and weigh it. Heavy. The results show that the leaching pulp is better.

[0055]

[0056] Impurity removal method Yield fiber traits cooking press method 50.6% Pale yellow, generally dissociated and intertwined Distillation method 48.3% Pale yellow, good dissociation and interweaving cold pressing 58.0% Pale yellow, generally dissociated and interwoven, thicker fibers

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Abstract

The invention relates to a process and an apparatus for organic compound fertilizer co-produced with straw papermaking. The process comprises the steps of mixing a medicine liquid and straw truncated materials uniformly and thoroughly, promoting a straw wetting reaction by using hot water for heat preservation, making the mixture into a mixed pulp through mechanical pulping, separating paper pulp and waste water by a steaming and spraying method on a steaming and spraying device, thus obtaining neutral paper pulp and concentrated waste water capable of directly being used as raw materials for the organic compound fertilizer at the same time, wherein the medicine liquid is a mixed solution JH03 of sodium peroxide containing sodium ozonide or an alkaline solution JH02 of sodium peroxide. Liquid-solid separation is carried out by using the steaming and spraying method, so that clean paper pulp and concentrated waste water capable of directly being used as raw materials for the organic compound fertilizer can be obtained without washing water, all organic impurities after the paper pulp is extracted from the straws can be utilized, full utilization of a large amount of agricultural straws can be realized and a circular economy system of paper-fertilizer circulation, water circulation, zero waste water discharge and zero CO2 discharge. The process and apparatus are also suitable for pulping by other papermaking raw materials.

Description

technical field [0001] The invention relates to a new process for producing organic compound fertilizer by using straw papermaking chain. Background technique [0002] Making paper with a large amount of cellulose contained in straw is a problem that our ancestors have already solved, and it is the bounden duty of our generation to solve the problem of separating and utilizing waste water. Taking wheat straw as an example, in addition to ~45% cellulose, it also contains ~55% of organic matter such as lignin and sugar, and contains trace elements needed by crops, including nitrogen (N), phosphorus (P 2 o 5 ), potassium (K 2 O) About 2% of wheat straw. Making full use of these renewable resources is an inevitable requirement for scientifically developing agriculture, serving agriculture, serving society, and benefiting farmers. [0003] Straw is used extensively in papermaking. A large number of small and medium-sized paper mills were shut down due to direct discharge of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00C05G1/00C05F7/00
CPCY02A40/20
Inventor 黄正华
Owner 黄正华
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