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Integral purified integration system and process of lignite in cement production through catalytic mild pyrolysis

A technology of pyrolysis upgrading and integrated system, which is applied in the field of lignite catalytic mild pyrolysis upgrading integrated system, which can solve the problems of clogging and upgrading process pipelines, increasing carbon dioxide emissions, and high oxygen content in hot flue gas, so as to reduce costs , Increase water vapor content, reduce the effect of dust content

Inactive Publication Date: 2011-05-18
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In short, the existing lignite upgrading technology has the following disadvantages: 1. The existing lignite upgrading technology needs to provide a separate heat source, high energy consumption, increased production costs, and increased carbon dioxide emissions; 2. In the existing lignite upgrading technology During the production process, more coal tar will be produced, which will not only block the upgrading process pipeline, but also make the upgraded lignite calorific value low; , lignite upgrading is prone to explosion; 4. Some technologies require high pressure, which increases equipment investment and technical requirements. The large investment scale and high equipment requirements are difficult for enterprises to bear, and it is difficult to realize industrialization;

Method used

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  • Integral purified integration system and process of lignite in cement production through catalytic mild pyrolysis
  • Integral purified integration system and process of lignite in cement production through catalytic mild pyrolysis
  • Integral purified integration system and process of lignite in cement production through catalytic mild pyrolysis

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Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1: as figure 1 As shown, the integrated lignite catalytic mild pyrolysis upgrading integrated system in cement production includes a cement firing system 3, a crusher 6, a pre-dryer 7, a roller press 8, a catalyst storage bin 18, a drying Crusher 9, vertical drying cylinder 10, cyclone separator 11, coal bunker 16;

[0031] Among them, the cooler for cooling the clinker of the cement burning system 3 - the cooler 5 is connected to the pre-dryer 7 through the pipeline, and the cement kiln tail of the cement burning system 3 - the multi-stage preheater 1 is connected to the drying crusher through the pipeline 9 connections, crusher 6, pre-dryer 7, roller press 8, drying crusher 9, vertical drying cylinder 10, cyclone separator 11, coal bunker 16 are connected in sequence, catalyst storage bin 18 is connected with the roller press 8 phase connections.

[0032]The cement burning system 3 is a suspension preheater kiln, which includes a multi-stage preheater 1, ...

Embodiment 2

[0040] Embodiment 2: Integrated lignite catalytic mild pyrolysis upgrading integrated system in cement production, which includes cement burning system 3, crusher 6, pre-dryer 7, roller press 8, catalyst storage bin 18, oven Dry crusher 9, vertical drying cylinder 10, cyclone separator 11, grinding device 12, coal particle classification device 13, coal powder feeding device 14, dust collector 15 and water recovery device 17; wherein the cement firing system 3 The cooler for cooling the clinker—the cooler 5 is connected to the pre-dryer 7 through pipelines, the cement kiln tail of the cement firing system 3—the multistage preheater 1 is connected to the drying crusher 9 through pipelines, and the crushers 6, The pre-dryer 7, roller press 8, drying crusher 9, vertical drying cylinder 10, and cyclone separator 11 are respectively connected in sequence, the catalyst storage bin 18 is connected with the roller press 8, the cyclone separator 11, and the coal particle The classifyin...

Embodiment 3

[0054] Embodiment 3: in the integration system of lignite catalytic mild pyrolysis upgrading in the cement production of embodiment 1, the cement firing system can also be a Liboer kiln, which includes a Liboer preheater, a cooling machine and a coal kiln. Powder burner, wherein the clinker cooling cooler of the cement firing system 3 is the cooler of the Liber kiln, and the cement kiln tail of the cement firing system 3 is the Liber preheater.

[0055] The pre-dryer 7 is a vertical dryer.

[0056] In step (2) of Example 1, the catalyst in the catalyst storage bin 18 can also be added to the roller press 8 at a rate of 3% by mass.

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Abstract

The invention discloses an integral purified integration system and process of lignite in cement production through catalytic mild pyrolysis. The system comprises a cement firing system, a crusher, a pre-drying machine, a roll squeezer, a catalyst storage bin, a drying crusher, a vertical drying cylinder and a cyclone separator. The process sequentially comprises the following steps of: (1) initially crushing raw coal of the lignite into coal briquettes; (2) pre-drying the coal briquettes and rolling to crush the coal briquettes to form coal particles; (3) crushing the coal particles to be coal powder through the drying crusher; (4) carrying out heat exchanging, drying and purification on the fine coal powder through the vertical drying cylinder; and (5) separating the purified lignite from the gas through the cyclone separator to obtain a purified lignite finished product. The invention has the advantages that the afterheat in the cement production is fully utilized so as to save energy, reduce consumption and decrease the emission of carbon dioxide; and by utilizing the original process equipment, in the cement production, an additional device is not needed, therefore, the investment is less and the profit is great, and 10,000,000 Yuan on 2500T / d cement production line can be saved every year.

Description

technical field [0001] The invention relates to an integrated system and process for catalytic mild pyrolysis and upgrading of lignite, in particular to an integrated integrated system and process for classifying and upgrading lignite by using waste gas generated by a cement burning system. Background technique [0002] According to statistics, the world's lignite reserves are about 2622.9 billion tons, accounting for about 24.4% of the world's total coal reserves. China has discovered lignite resources of 210 billion tons, accounting for about 13% of China's coal reserves. Because lignite is formed very shallow from the surface, it is suitable for open-pit mining, so it is cheap. But lignite also has the following outstanding problems: [0003] 1. High moisture and low calorific value. Lignite generally has a water content between 30% and 65%, and its general calorific value is about 3000kcal / kg; 2. Low density, easy to weather, spontaneous combustion when exposed to wate...

Claims

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Application Information

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IPC IPC(8): C10L9/00C10L9/08C10L5/00C04B7/36F23K3/00
CPCY02P40/121
Inventor 滕英跃刘全生智科端何润霞周晨亮宋银敏
Owner INNER MONGOLIA UNIV OF TECH
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