System and method for co-processing organic waste by cement kiln

A technology of organic waste and co-processing, applied in cement production, combustion method, combustion type, etc., can solve the problems affecting the stable operation of cement sintering system and clinker quality stability, and achieve the effect of reducing negative effects

Pending Publication Date: 2022-07-12
SINOMA INT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The system of the present invention solves the problem of affecting the stable operation of the cement firing system and clinker quality when the cement kiln co-processes a large amount of organic waste. The temperature of the material entering the calciner; and by improving the ash cooling system and introducing the cooling air of the cooling system into the pre-combustion furnace, supplemented by a burner, so as to control the combustion temperature in the multi-phase pre-combustion furnace

Method used

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  • System and method for co-processing organic waste by cement kiln
  • System and method for co-processing organic waste by cement kiln
  • System and method for co-processing organic waste by cement kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: as figure 1 As shown, the system for co-processing organic wastes in a cement kiln of the present invention includes a multiphase pre-combustion furnace 1 and a material distribution device 2 connected to the solid outlet of the multiphase pre-combustion furnace 1, and the outlets of the material distribution device 2 are respectively connected with the decomposition furnace. 3 is connected with the ash and slag cooling system 4 , a first valve 201 is arranged between the material distribution device 2 and the ash and slag cooling system 4 , and a second valve 202 is arranged between the material distribution device 2 and the decomposition furnace 3 .

[0024] The front end of the multi-phase pre-combustion furnace 1 of the present invention is provided with an inlet and an auxiliary burner for feeding wastes in various phases (solid, semi-solid, liquid). In the example, the main body of the multiphase pre-combustion furnace 1 adopts a rotary kiln structure w...

Embodiment 2

[0030] Embodiment 2: a method for processing organic wastes by utilizing the system for co-processing organic wastes in a cement kiln of Embodiment 1, comprising the following steps:

[0031](S1) The waste is sent into the multi-phase pre-combustion furnace 1, and the air volume sent into the multi-phase pre-combustion furnace 1 is adjusted through the air volume control valve of the tertiary air branch pipe 101 and the first residual air branch pipe 406, and at the same time according to the tertiary air branch pipe 101 and the air volume ratio of the first residual air branch pipe 406 and the injection amount of auxiliary fuel to control the operating temperature of the multiphase waste pre-combustion furnace;

[0032] (S2) the ash and slag processed by the multiphase pre-combustion furnace 1 is sent into the decomposition furnace 3 for processing through the material distribution device 2 or into the ash and slag cooling system 4;

[0033] (S3) The ash sent into the ash coo...

Embodiment 3

[0035] Embodiment 3: the material of the present invention and heat balance are calculated as follows:

[0036] (1) Calculation of material and heat balance of multiphase pre-combustion furnace

[0037] The calculation uses the tertiary air of the cement production line and all the residual air of the ash cooling system as the combustion air source and heat source, and adjusts the proportion of the tertiary air supply to ensure that the rotary kiln does not need supplementary combustion. The organic waste with low calorific value (1000kcal / kg) was selected as the research object, and its composition is shown in Table 1.

[0038] Table 1 Elemental composition of low calorific value (1000kcal / kg) organic waste materials co-processing in cement kilns

[0039] type C H O N S Cl Water ASH F total waste 10.00％ 2.20％ 4.30％ 0.00％ 0.00％ 0.00％ 40.00％ 43.50％ 0.00％ 100％

[0040] The design parameters are selected as follows:

[0041] ①The outle...

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Abstract

The invention discloses a system and a method for co-processing organic wastes in a cement kiln. The treatment system comprises a multi-phase pre-combustion furnace and a material distributing device connected with a slag outlet of the multi-phase pre-combustion furnace. An outlet of the material distributing device is respectively connected with the decomposing furnace and the ash cooling system; the ash cooling system comprises a roller type crusher, an ash grate cooler arranged at an outlet of the roller type crusher, a tail roller type crusher arranged at an outlet of the ash grate cooler, an air blower used for providing cooling air for the ash grate cooler and an induced draft fan communicated with a gas outlet of the ash grate cooler. And an air inlet of the multi-phase pre-combustion furnace is respectively communicated with a tertiary air branch pipe and an induced draft fan. The method is suitable for various practical conditions of various organic wastes, complex sources, large component fluctuation, large physical and chemical component differences and the like, and stable operation of a cement clinker sintering system is not affected.

Description

technical field [0001] The invention belongs to the technical field of waste disposal, and in particular relates to a system and a processing method for co-processing organic waste in a cement kiln. Background technique [0002] Chinese patent application CN102607044A discloses an incineration method for disposing of multi-variety and multi-phase wastes, which belongs to the field of waste treatment methods. From top to bottom, the high-temperature wind of the incineration device ignites and incinerates the waste to be incinerated, and carries the incineration product out of the incineration device; The incineration device shall be removed from the incineration device after the designated time of controlled incineration. The invention is an incineration method capable of simultaneously disposing of three or more types and multiphase wastes (industrial waste residue, waste liquid, municipal solid waste, sewage sludge), and can complete integrated disposal. [0003] The comb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/08F23G5/20F23G5/44F23G5/50F23G5/46
CPCF23G5/08F23G5/20F23G5/44F23G5/50F23G5/46F23G2203/20F23G2204/10F23G2206/203Y02P40/10
Inventor 宿向超黄锋张征檀雷姜凯陈翼赵小亮宁建根汤升亮朱永长李崇
Owner SINOMA INT ENG
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