阅读说明：本技术 由在线型分解炉改造的可调节co2富集量水泥窑系统及其使用方法 (Cement kiln system capable of adjusting CO2 enrichment amount and improved by online decomposing furnace and using method thereof ) 是由 何小龙 胡芝娟 彭学平 代中元 陈昌华 于 2019-08-12 设计创作，主要内容包括：本发明涉及由在线型分解炉改造的可调节CO-2富集量水泥窑系统及方法。通过本发明部件的调节功能,可以使系统切换为CO-2自富集型预分解窑或常规在线型预分解窑。本发明可根据CO-2的需求量调节系统的部件,进而灵活调节水泥窑系统CO-2富集量。而且,本发明的水泥窑系统无需对关键烧成设备进行重新设计,即可进行CO-2富集,降低改造成本。此外,当本发明系统作为CO-2自富集型预分解窑时,第三列旋风预热器出口烟气中CO-2浓度＞70％,可大大降低后续CO-2捕集提纯和运行成本,且高CO-2浓度的烟气量可灵活调整为常规预分解窑系统预热器出口烟气量的5～30％,大大降低了预分解窑系统的CO-2排放量。(The invention relates to an adjustable CO modified by an online decomposing furnace 2 An enrichment cement kiln system and method. By means of the regulating function of the components of the invention, the system can be switched to CO 2 Self-enriching type pre-decomposition kiln or conventional on-line type pre-decomposition kiln. The invention can be based on CO 2 The required quantity of the system, and further flexibly adjusting the CO of the cement kiln system 2 And (4) enriching amount. Moreover, the cement kiln system of the present invention allows for CO production without redesigning critical firing equipment 2 Enrichment and reduction of reconstruction cost. Furthermore, when the system of the present invention is used as a CO 2 In the flue gas at the outlet of the third row of cyclone preheaters in the self-enrichment type pre-decomposition kilnCO 2 The concentration is more than 70 percent, and the subsequent CO can be greatly reduced 2 High CO capture, purification and operation cost 2 The concentration flue gas amount can be flexibly adjusted to 5-30% of the outlet flue gas amount of the preheater of the conventional predecomposition kiln system, so that the CO content of the predecomposition kiln system is greatly reduced 2 And (4) discharging the amount.)

Adjustable CO reformed from in-line type decomposing furnace₂Enrichment cement kiln system, its characterized in that, cement kiln system includes: the device comprises a first row of cyclone preheaters, a second row of cyclone preheaters, a third row of cyclone preheaters, a first decomposing furnace, a second decomposing furnace, a smoke chamber, a rotary kiln and a cooler;

the air inlets of the first row of cyclone preheaters and the second row of cyclone preheaters are connected with the first decomposing furnace; the discharge port of the first row of cyclone preheaters or the discharge port of the second row of cyclone preheaters is connected with the second decomposing furnace; the air inlet of the third row of cyclone preheaters is connected with the second decomposing furnace, and the discharge hole of the first-to-last cyclone separator of the third row of cyclone preheaters is connected with the smoke chamber;

the first decomposing furnace is connected with a smoke chamber, and the smoke chamber is connected with the rotary kiln; the rotary kiln is connected with a cooler.

The adjustable CO retrofitted to in-line decomposition furnace of claim 1₂An enrichment cement kiln system is characterized in that,

a first distributing valve is arranged at a discharging pipe of a penultimate cyclone separator of the second row of cyclone preheaters, one end of the first distributing valve is connected with the first decomposing furnace, and the other end of the first distributing valve is connected with the second decomposing furnace.

The adjustable CO retrofitted to in-line decomposition furnace of claim 1₂The enrichment cement kiln system is characterized in that a penultimate cyclone separator of a first row of cyclone preheaters is connected with a first decomposing furnace through a pipeline, and the pipeline does not comprise a branch or comprises a branch;

when the pipeline does not comprise a branch, the first row of cyclone preheaters feeds the first decomposing furnace at a single point;

when the pipeline comprises a branch, the first row of cyclone preheaters feeds the first decomposing furnace at multiple points; the pipeline comprises a conveying main road and conveying branch roads, the number of the conveying branch roads is more than 2, the conveying branch roads are connected in parallel, and a second distributing valve is arranged at the joint of the conveying main road and the conveying branch roads; the second material distributing valve is used for adjusting the material quantity entering the conveying branch from the conveying main path.

The adjustable CO retrofitted to in-line decomposition furnace of claim 1₂The enrichment cement kiln system is characterized in that a first row of cycloneThe number of stages of the preheater and the number of stages of the second row of cyclone preheaters are selected from 3-7 stages;

the third row of cyclone preheaters has the number of stages selected from 1-5.

The adjustable CO retrofitted to in-line decomposition furnace of claim 1₂The enriched water cement kiln system is characterized in that the cooler is one of a grate cooler, a single-cylinder cooler and a multi-cylinder cooler;

the cement kiln system also comprises a tertiary air pipe; one end of the tertiary air pipe is connected with the cooling machine, and the other end of the tertiary air pipe is connected with the first decomposing furnace.

The adjustable CO retrofitted to in-line decomposition furnace of claim 1₂The cement kiln system with the enrichment amount is characterized by further comprising a cooler, wherein an air outlet of the third row of cyclone preheaters is connected with the cooler; and the cooler is used for cooling the flue gas discharged from the air outlet of the third row of cyclone preheaters.

The adjustable CO retrofitted to the in-line decomposition furnace of claim 4₂The enrichment cement kiln system is characterized in that the first row of cyclone preheaters and the second row of cyclone preheaters are provided with feed inlets, and the feed inlets are arranged at inlet air pipes of uppermost first-stage cyclone separators of the first row of cyclone preheaters and the second row of cyclone preheaters or at inlet air pipes of uppermost second-stage cyclone separators of the first row of cyclone preheaters and the second row of cyclone preheaters;

the third row of the cyclone preheaters are provided with or not provided with feed inlets;

when the stage number of the third row of the cyclone preheaters is 1 stage, no feeding hole is arranged on the third row of the cyclone preheaters;

when the number of stages of the third row of cyclone preheaters is more than 2, a feeding hole is formed in the third row of cyclone preheaters; the feed inlet of the third row of cyclone preheaters is arranged at the inlet air pipe of the uppermost first-stage cyclone separator of the third row of cyclone preheaters or at the inlet air pipe of the uppermost second-stage cyclone separator of the third row of cyclone preheaters.

The adjustable CO retrofitted to in-line decomposition furnace of claim 7₂The enriched quantity cement kiln system is characterized in that when the grade number of the third row of cyclone preheaters is more than 2 grades, a communicating pipeline is arranged between the third row of cyclone preheaters and the first row of cyclone preheaters, and/or a communicating pipeline is arranged between the third row of cyclone preheaters and the second row of cyclone preheaters; the communicating pipeline is used for conveying the raw meal preheated by the third row of cyclone preheaters to the first row of cyclone preheaters or the second row of cyclone preheaters or simultaneously conveying the raw meal to the first row of cyclone preheaters and the second row of cyclone preheaters;

one end of the communicating pipeline is arranged at a discharge port of a last but one second cyclone separator of the third row of cyclone preheaters;

the other end of the communicating pipeline is arranged on an inlet air pipe of a first-stage cyclone separator on the top of the first-column cyclone preheater or the second-column cyclone preheater, or on an inlet air pipe of a second-stage cyclone separator on the top of the first-column cyclone preheater or the second-column cyclone preheater, or on an inlet air pipe of a third-stage cyclone separator on the top of the first-column cyclone preheater or the second-column cyclone preheater, or on an inlet air pipe of a fourth-stage cyclone separator on the top of the first-column cyclone preheater or the second-column cyclone preheater, or on an inlet air pipe of a fifth-stage cyclone separator on the top of the first-column cyclone preheater or the second-column cyclone preheater.

The adjustable CO retrofitted to in-line decomposition furnace of claim 5₂The cement kiln system for enriching the cement is characterized by further comprising a heat exchanger, wherein the tertiary air pipe is divided into two paths, one end of the tertiary air pipe is connected with a cooling machine, and the other end of the tertiary air pipe in one path is connected with a first decomposing furnace; the other path is connected with the other end of the tertiary air pipeAnd the heat exchanger is connected with the second decomposing furnace through a pipeline.

Use of the adjustable CO retrofitted on the in-line decomposition furnace according to any of claims 1 to 9₂A method for producing cement clinker in an enrichment cement kiln system, the method comprising:

adding the raw materials into a first row of cyclone preheaters and a second row of cyclone preheaters respectively, and exchanging heat between the raw materials and the flue gas in the cyclone preheaters;

the raw meal preheated by the first row of cyclone preheaters and the second row of cyclone preheaters enters the first decomposing furnace through one or more points; part of the hot raw meal preheated by the first row of cyclone preheaters or the second row of cyclone preheaters or the first row of cyclone preheaters and the second row of cyclone preheaters enters the second decomposing furnace through one point or multiple points;

the decomposed hot raw materials leave the first decomposing furnace and the second decomposing furnace, are separated from the flue gas and then enter the rotary kiln, are calcined in the rotary kiln to form cement clinker, and the clinker enters a cooling machine from the outlet of the rotary kiln;

the mixed gas of oxygen and circulating flue gas or oxygen is conveyed into a second decomposing furnace, the second decomposing furnace is oxygen-enriched combustion or total oxygen combustion, and high CO generated in the second decomposing furnace₂The concentrated flue gas is discharged through a third row of cyclone preheaters; the CO can be regulated by regulating the amount of hot raw meal entering the second decomposition furnace₂And (4) enriching amount.

The method for manufacturing cement clinker according to claim 10, wherein the raw meal preheated by the second row of cyclone preheaters is divided into two paths by the first material dividing valve, one path enters the first decomposing furnace, and the other path enters the second decomposing furnace;

the amount of hot raw meal fed into the second decomposing furnace through the first material distributing valve can be adjusted to adjust CO₂And (4) enriching amount.

The method for manufacturing cement clinker according to claim 11,

respectively feeding raw materials into a first row of cyclone preheaters and a second row of cyclone preheaters, feeding the raw materials preheated by the first row of cyclone preheaters and the second row of cyclone preheaters into a first decomposing furnace, regulating and conveying the amount of hot raw materials into a second decomposing furnace through a first material distributing valve, wherein the second decomposing furnace is in oxygen-enriched combustion or total oxygen combustion, and the system is CO₂The self-enrichment type pre-decomposition kiln can adjust the amount of the hot raw materials entering the second decomposition furnace through adjusting the first material distributing valve₂Enriching amount;

raw materials are respectively fed into a first row of cyclone preheaters and a second row of cyclone preheaters, the raw materials preheated by the first row of cyclone preheaters and the second row of cyclone preheaters enter a first decomposing furnace, a first material distributing valve is adjusted to enable all the raw materials preheated by the second row of cyclone preheaters to be conveyed to the first decomposing furnace, the second decomposing furnace, the third row of cyclone preheaters and a cooler are stopped to be used, and at the moment, the system is a conventional online type pre-decomposing kiln.

A method for manufacturing cement clinker according to claim 10, wherein when the raw meal is fed to the third row of cyclone preheaters, the preheated raw meal from the third row of cyclone preheaters is fed to the first row of cyclone preheaters or the second row of cyclone preheaters through the connecting duct or is fed to both the first row of cyclone preheaters and the second row of cyclone preheaters.

The method for preparing cement clinker according to claim 10, wherein the air is cooled by the cooler in terms of gas flow direction, and the heat exchange is completed by the air comprising the following three paths: the first path of high-temperature air is used as secondary air and directly enters the rotary kiln for fuel combustion; the second path of high-temperature air is used as tertiary air and directly enters the first decomposing furnace for fuel combustion; and the third path of air with higher temperature enters a waste heat boiler for power generation or other waste heat utilization or treatment systems, and the flue gas after power generation is completed or other waste heat utilization or treatment systems is treated by the waste air and then is discharged into the atmosphere through a chimney.

The method for manufacturing cement clinker according to claim 14, wherein the second path of high temperature air is divided into two paths as tertiary air, wherein one path of tertiary air enters the first decomposing furnace through a tertiary air pipe; the other path of tertiary air enters a heat exchanger through a tertiary air pipe, the mixed gas of oxygen and circulating flue gas or oxygen enters the heat exchanger, the mixed gas of oxygen and circulating flue gas or oxygen after heat exchange enters a second decomposition furnace through a pipeline, and oxygen-enriched combustion or total oxygen combustion is carried out in the second decomposition furnace; the tertiary air after heat exchange enters a waste heat utilization or treatment system;

the waste heat utilization or treatment system comprises waste heat power generation and material drying.