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Process and device for utilizing circulation water residual heat in production of coated controlled release fertilizer

A technology of coated controlled-release fertilizer and circulating water, which is applied in fertilization equipment, application, chemical industry, etc., can solve the problems of high energy consumption, restricting the promotion and application of controlled-release fertilizer, etc., so as to reduce the amount of circulating water, reduce equipment investment and Operating cost, water saving effect

Active Publication Date: 2011-01-05
KINGENTA ECOLOGICAL ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also has disadvantages such as high energy consumption, which restricts the popularization and application of controlled-release fertilizers.

Method used

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  • Process and device for utilizing circulation water residual heat in production of coated controlled release fertilizer
  • Process and device for utilizing circulation water residual heat in production of coated controlled release fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The waste heat recovery and utilization device of circulating water in the production of coated controlled-release fertilizer, such as figure 1 As shown, it includes a fluidized bed 1, a fan 2, a condenser 3, a preheater 4, waste heat recovery heating equipment 5, a circulating water pump 6 and a cooling tower 7. The air of the fluidized bed 1 is connected to the outlet of the solvent mixed gas through the fan 2, the condenser 3, the preheater 4 and the preheated gas inlet of the fluidized bed 1 to form a closed circuit; the part of the cooling circulating water of the condenser 3 is connected with the The waste heat recovery heating equipment 5 is connected to form a cycle, and part of the cooling circulating water is connected to the cooling water tower 7 through the circulating water pump 6 to form a cycle; the heating medium of the preheater 4 is connected to the waste heat recovery heating equipment 5 to form a closed circuit.

[0028] The process of using this dev...

Embodiment 2

[0034] The waste heat recovery and utilization device of circulating water in the production of coated controlled-release fertilizer, the structure is still as follows figure 1 Shown, but utilize this device to carry out the process of recycling water waste heat utilization in the production of coated controlled-release fertilizer and the difference of embodiment 1 is:

[0035] The step A: the flow rate of the mixed gas from the fluidized bed 1 is 100000m 3 / h, the temperature is 60°C, enter the condenser 3 through the fan 2 to condense to 30°C to recover part of the solvent, enter the preheater 4 to preheat to 70°C, and then enter the fluidized bed 1 for recycling.

[0036] The step B: In the condenser 3, the cooling circulating water inlet temperature is 30°C, and the flow rate is 300m 3 / h, 55% of which comes from the cooling tower 7, and the remaining 45% comes from the waste heat recovery heating equipment 5, the return temperature of the cooling circulating water is 35°...

Embodiment 3

[0040] The waste heat recovery and utilization device of circulating water in the production of coated controlled-release fertilizer, the structure is still as follows figure 1 Shown, but utilize this device to carry out the process of circulating water waste heat utilization in the production of coated controlled-release fertilizer and the difference of embodiment 1 or 2 is:

[0041] The step A: the flow rate of the mixed gas from the fluidized bed 1 is 300000m 3 / h, the temperature is 70°C, enter the condenser 3 through the fan 2 to condense to 40°C to recover part of the solvent, enter the preheater 4 to preheat to 80°C, and then enter the fluidized bed 1 for recycling.

[0042] The step B: In the condenser 3, the cooling circulating water inlet temperature is 35°C, and the flow rate is 1000m 3 / h, 65% of which comes from the cooling tower 7, and the remaining 35% comes from the waste heat recovery heating equipment 5, the return temperature of the cooling circulating wate...

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Abstract

The invention discloses a process and a device for utilizing circulation water residual heat in the industrial production of a coated controlled release fertilizer. Mixed gas from a fluidized bed enters a condenser through a fan for condensation to recover partial solvent, then enters a preheater for preheating, and then enters the fluidized bed for recycling; in the condenser, the inflow part ofthe cooling circulation water comes from a cooling tower, part comes from a residual heat recovering and heating device, the back water part of the cooling circulation water returns the cooling towerfor cooling and part returns the residual heat recovering and heating device for recovering residual heat; driven by a driving heat source, the residual heat recovering and heating device recovers residual heat in the cooling circulation back water from the condenser and produces hot water as the heating medium used by the preheater; and hot water used by the preheater returns the residual heat recovering and heating device for recycling. By using the device in the process to produce the coated controlled release fertilizer, the residual heat utilization ratio of the cooling circulation back water is as high as over 40% and the power consumption of the product is reduced.

Description

technical field [0001] The invention belongs to the technical field of controlled-release fertilizer production, and in particular relates to a circulating water waste heat utilization process and device for industrial production of coated controlled-release fertilizer. Background technique [0002] Controlled-release fertilizer is a new type of fertilizer that wraps a special film on the outer layer of traditional fertilizers to control the release rate and amount of nutrients according to the nutrient requirements of crops, so that the nutrient release curve is consistent with crop requirements. The outstanding feature of this fertilizer is to supply effective nutrients synchronously according to the growth curve of crops, so that the effective utilization rate of fertilizer nutrients is greatly improved. Under the premise of ensuring crop growth, compared with fertilizers with the same concentration, the fertilizer efficiency can be increased by more than 50%. The amount ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCY02P20/10Y02P20/129
Inventor 范玲超解玉洪李广涛徐淑班
Owner KINGENTA ECOLOGICAL ENG GRP