Method for preparing farmland chemical fertilizer sustained-release agent and potash fertilizer by using biomass incineration ash

A technology of incineration ash and slow-release agent, which is applied in the preparation of alkali metal nitrate, nitrogen fertilizer, application, etc., can solve the problems of deteriorating air quality, formation of dust, waste, etc., to reduce the amount of extraction agent added, prevent redeposition, The Effect of Adding Amount of Water-saving Extractant

Active Publication Date: 2016-09-14
黑龙江炭和科技研发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If these ash cannot be effectively managed and comprehensively utilized, it will also form flying dust and deteriorate air quality
On the other hand, biomas

Method used

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  • Method for preparing farmland chemical fertilizer sustained-release agent and potash fertilizer by using biomass incineration ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment one: get 20kg of biomass ash and place it on the ash rack 4, then put it into the reactor 3 stably, the inner wall of the reactor is made of Hastelloy, inject the configured 18kg dilute nitric acid solution (concentration is 25%), close Reactor cover 2, check the seal; open the reactor agitator 1; connect the bypass flue, use the waste heat of the flue gas to heat the reactor; observe the temperature and pressure in the reactor and the temperature change of the flue, and control the internal temperature of the reactor through the flue damper. Temperature, keep at a temperature of 180°C and a pressure of 1.6MPa for 12 minutes; after the holding time is completed, quickly open the discharge valve 8 at the bottom of the reactor, and the high-temperature solution quickly enters the cooling crystallization tank 7, which is filled with KNO at room temperature 3 The saturated solution is used as a cooling liquid, and after cooling, the KNO-rich 3 Coarse crystalline ...

Embodiment 2

[0021] Embodiment two: get 20kg biomass ash and be placed on the ash frame 4, put into reactor 3 steadily then, the inner wall of reactor is all made of Hastelloy alloy, injects the 20kg dilute nitric acid solution (concentration is 30%) of configuration, closes Reactor cover 2, check the seal; open the reactor agitator 1; connect the bypass flue, use the waste heat of the flue gas to heat the reactor; observe the temperature and pressure in the reactor and the temperature change of the flue, and control the internal temperature of the reactor through the flue damper. Temperature, at a temperature of 200°C and a pressure of 1.6MPa for 11 minutes; after the holding time is completed, quickly open the discharge valve 8 at the bottom of the reactor, and the high-temperature solution quickly enters the cooling crystallization tank 7, which is filled with KNO at room temperature 3 The saturated solution is used as a cooling liquid, and after cooling, the KNO-rich 3 Coarse crystalli...

Embodiment 3

[0022] Embodiment three: get 20kg biomass ash and be placed on the ash frame 4, put into reactor 3 stably then, the inner wall of reactor is all made of Hastelloy alloy, injects the 22kg dilute nitric acid solution (concentration is 40%) of configuration, closes Reactor cover 2, check the seal; open the reactor agitator 1; connect the bypass flue, use the waste heat of the flue gas to heat the reactor; observe the temperature and pressure in the reactor and the temperature change of the flue, and control the internal temperature of the reactor through the flue damper. Temperature, at a temperature of 220°C and a pressure of 1.5MPa for 10 minutes; after the holding time is completed, quickly open the discharge valve 8 at the bottom of the reactor, and the high-temperature solution quickly enters the cooling crystallization tank 7, which is filled with KNO at room temperature 3 The saturated solution is used as a cooling liquid, and after cooling, the KNO-rich 3 Coarse crystalli...

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Abstract

The invention discloses a method for preparing a farmland chemical fertilizer sustained-release agent and a potash fertilizer by using biomass incineration ash, wherein the method comprises the following steps: 1, taking a certain amount of biomass ash, placing on an ash frame, then smoothly putting into a reaction kettle, injecting a nitric acid solution with the mass ratio of 25-40%, closing with a cover of a reaction kettle, and checking sealing; 2, starting up a stirrer of the reaction kettle; heating the reaction kettle; keeping stirring for 10-12 min at the temperature of 180-220 DEG C and the pressure of 1.5-1.6 MPa; 3, opening a discharge valve at the bottom of the reaction kettle, and allowing a high-temperature solution to enter a cooling pond, wherein a cooling liquid is a KNO3 saturated solution at room temperature; and after the cooling liquid is cooled, collecting a precipitated KNO3 coarse crystal salt; 4, removing the ash frame of the reaction kettle, collecting a residual solid ash matter, and adding lime to adjust the pH to 6-8, to obtain the farmland sustained-release agent; and 5, extracting a supernatant of the cooling pond to prepare a nitric acid solution, restarting the step 1, and carrying out circulating production. The method can realize efficient rapid extraction of the potassium element in the biomass ash to prepare the binary compound fertilizer and preparation of the good chemical fertilizer sustained-release agent.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and circular economy, and in particular relates to a method for preparing farmland chemical fertilizer slow-release agent and extracting potassium element from ash generated by biomass incineration for power generation. Background technique [0002] Straw, bagasse, forestry waste, etc. have high calorific value and are good raw materials for biomass incineration to generate electricity. Biomass incineration power generation technology (referred to as biomass power generation) can realize the clean utilization of biomass energy, has significant economic and social benefits, and has been continuously popularized and applied. In 2009, the installed capacity of biomass power generation excluding domestic waste was 1.088 million kilowatts, and the power generation capacity was 5.217 billion kwh; in 2014, the installed capacity of biomass power generation excluding domestic waste was 5....

Claims

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Application Information

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IPC IPC(8): C01D9/04C05C5/02C05G3/00
CPCC01D9/04C05C5/02C05G3/00
Inventor 严密江志强方祝敏何磊林杰徐璋胡艳军任建莉
Owner 黑龙江炭和科技研发有限公司
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