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Method for completely recycling compound fertilizer granulation tail gas

A compound fertilizer and tail gas technology, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve problems such as polluting the environment and wasting resources, and achieve the effects of saving power consumption, reducing processing costs, and reducing loads

Inactive Publication Date: 2012-09-19
吕庆淮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To thoroughly solve the problems of wasting resources and polluting the environment

Method used

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  • Method for completely recycling compound fertilizer granulation tail gas
  • Method for completely recycling compound fertilizer granulation tail gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of complete recycling method of compound fertilizer granulation tail gas of the present invention comprises the following steps:

[0031] ①High level settlement

[0032] The tail gas from the dust recovery enters the absorption tower, and after circulating vacuum absorption, the water-containing slurry obtained from the tower kettle is pumped into a volume of 20 meters by a mud pump. 3 The high-level settling tank is naturally settled for 4 hours, the supernatant liquid flows into the batching workshop through the pipeline, and is used as solid raw material to dissolve the process water, and the cement-containing slurry in the lower layer enters the vacuum dehydrator;

[0033] ②Vacuum dehydration

[0034] The cement-containing slurry in the lower layer from step ① is dehydrated by the vacuum dehydrator, and the filtrate flows into the batching workshop through the pipeline, and is used as solid raw material to dissolve process water. The filter cake is sent to ...

Embodiment 2

[0036] According to the method and steps of Example 1, the difference is that the volume of the high-level settling tank is at least 50 cubic meters, and the time for the natural settlement of the water-containing slurry in the high-level settling tank is at least 8 hours.

Embodiment 3

[0038] According to the method and steps of Example 1, the difference is that the volume of the high-level settling tank is at least 100 cubic meters, and the natural settlement time of the water-containing slurry in the high-level settling tank is at least 24 hours.

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Abstract

The invention discloses a method for completely recycling compound fertilizer granulation tail gas, which belongs to the recycling of industrial waste gas carried material. The method is characterized in that obtained lower layer aqueous slurry is subjected to absorption and settlement by water, and then is sequentially treated through a slurry pump, a high settling bath and a centrifugal drier device, and then solid and liquid are completely separated; filter cakes are fed to a raw material warehouse and served as compound fertilizer batching material; filter liquor is fed to a batch house and served as dissolving process water; and material carried by granulation tail gas is completely recycled. The method comprises the following steps: high settlement and vacuum dewatering. According to the method, tail gas produced during compound fertilizer production is recycled completely, not only water solution part resource in the tail gas produced during the compound fertilizer production is recycled, but also solid material not dissolved in water is recycled effectively. According to the method, the energy is saved, the environmental protection is facilitated, and the production cost of compound fertilizer is lowered. The method is applicable to the treatment of compound fertilizer and tail gas produced during the compound fertilizer production.

Description

technical field [0001] The invention relates to a method for completely recycling compound fertilizer granulation tail gas, which belongs to the recycling and utilization of materials carried by industrial waste gas. Background technique [0002] In the production of compound fertilizer, granulation, hot air drying, cooling, screening, heating. During the process of cooling and other processes, the products of physical and chemical changes such as material dust and volatile components will inevitably be produced. Exhaust system entrained with drying and cooling airflow. For a long time, these dusts and their volatile components have directly entered the atmosphere with the exhaust airflow, causing waste of resources and environmental pollution. [0003] CN 200910229252.0 discloses a compound fertilizer granulation tail gas recovery and utilization method, including acidification, vacuum absorption, solid-liquid separation, neutralization and other operating steps. Its dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D47/06B01D47/14B01D53/18B01D53/78B01D21/02
Inventor 吕庆淮付庆涛余天桃张杰
Owner 吕庆淮