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Method for preparing organic-inorganic mixed fertilizer by using KOH and NaOH mixed soda pulping process black liquor for reeds

A technology of pulping black liquor and mixing alkali, which is applied in the field of papermaking and fertilizer production, can solve the problems of no reeds found, high cost, secondary pollution, etc., and achieve the effects of improving physics, increasing utilization rate, and stabilizing organic matter content

Inactive Publication Date: 2016-12-07
宁夏同创秸科生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the alkaline pulping of straw pulping mainly uses NaOH (caustic soda) for pulping. The black liquor produced after alkaline cooking and washing is usually filtered by a black liquor filter, and then enters the evaporation section of alkali recovery in turn. , combustion section, and causticizing section to recover alkali, and the operation cost of the entire alkali recovery is relatively high
At the same time, alkali recovery causes serious secondary pollution to the environment.
[0003] At present, there is no method for extracting organic-inorganic mixed fertilizer from black liquor of reed using KOH and NaOH mixed alkaline pulping process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0026] 1. Dry material preparation, grass cutting and dust removal:

[0027] The purchased reeds are used and stacked in the return yard for later use. After being air-dried, it is sent to the lawn cutter to be cut into 15-30mm long flakes. The flakes have a moisture content of 10-15%. After being dedusted by the dust collector, they are transported to the spiral prepreg machine for soaking with a scraper conveyor, and then passed through a manual pot loader. Load 40m 3 steamed balls.

[0028] 2. Batch cooking and black liquor extraction:

[0029] After the dry material preparation process, the reed is mixed with the cooking liquid, and then passed through the spiral prepreg machine, the pot loader, and then put into the steaming ball for cooking. The cooked coarse pulp is sprayed into the spray chamber, and the bottom of the spray chamber uses a screw propeller to push the reed pulp to the single-screw squeezer, and the squeezer squeezes out the black liquor, and the coars...

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Abstract

The invention discloses a method for preparing an organic-inorganic mixed fertilizer by using a KOH and NaOH mixed soda pulping process black liquid for reeds, and belongs to the fields of papermaking and fertilizer production. The main technological process of the method comprises the following steps: preparing a reed raw material, feeding the material into a roller type hay cutter for cutting, feeding chopped grass into a dust collector for dust collection after cutting, conveying the chopped grass by using a scraper conveyer, feeding the chopped grass into a spiral prepreg machine for soaking, carrying out intermittent cooking by means of a rotary spherical digester, enabling the chopped grass to enter a blowing cabin for coarse pulp blowing, extruding a black liquid by using a single-screw press master, storing the black liquid in an underground pulp storage pool, and feeding the black liquid into an organic fertilizer shop to prepare an organic fertilizer. The organic-inorganic mixed fertilizer prepared by the method is an organic fertilizer with multiple fertilizer effects, and the organic fertilizer is high in fertilizer effects and complete in functions.

Description

technical field [0001] The invention relates to the technical field of papermaking and fertilizer production, in particular to a method for producing active organic-inorganic mixed fertilizer from black liquor after reed pulping with KOH and NaOH mixed in alkali method. Background technique [0002] At present, the alkaline pulping of straw pulping mainly uses NaOH (caustic soda) for pulping. The black liquor produced after alkaline cooking and washing is usually filtered by a black liquor filter, and then enters the evaporation section of alkali recovery in turn. , combustion section, and causticizing section to recover alkali, and the operation cost of the entire alkali recovery is relatively high. At the same time, alkali recovery causes serious secondary pollution to the environment. [0003] There is no method for extracting organic-inorganic mixed fertilizer from black liquor of reed using KOH and NaOH mixed alkaline pulping process. Contents of the invention [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C11/00C05F7/02C05G3/00
CPCD21C11/00C05F7/02C05G3/00
Inventor 冯福德杨淑芬杨洁
Owner 宁夏同创秸科生物科技有限公司
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