Thermodynamic method and system for cement kiln to realize cooperative treatment of domestic garbage

A technology for domestic waste and co-processing, applied in cement production, combustion methods, waste heat treatment, etc., can solve the problems of high transportation cost, heat loss, energy waste, etc., and achieve economic benefits, increase power generation, and improve economic efficiency. Effect

Inactive Publication Date: 2018-09-07
新弘源科技股份有限公司
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing cement kiln synergistic treatment methods have the following problems: 1. Excessive utilization of waste heat in the cement production process, resulting in loss and waste of heat energy; 2. Initial air temperature of the primary and secondary air of the incineration boiler is low, resulting in energy waste Moreover, the primary and secondary air humidity is high, which seriously corrodes the air preheater and superheater; 3. The sl

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Thermodynamic method and system for cement kiln to realize cooperative treatment of domestic garbage
  • Thermodynamic method and system for cement kiln to realize cooperative treatment of domestic garbage
  • Thermodynamic method and system for cement kiln to realize cooperative treatment of domestic garbage

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1

[0039] Such as figure 1 As shown, the thermal system of the cement kiln co-processing domestic waste according to the present invention includes a waste incineration system, a power generation system, a cement production system, and other auxiliary systems. The waste incineration system includes an RDF production plant 1 connected in turn. Bed incinerator 2, cyclone separator 3, superheater 4 and economizer 5. The power generation system includes supplementary steam turbine 8 and generator 9. The superheater is connected to supplementary steam turbine and generator in turn. Other auxiliary systems include The denitrification device connected to the fluidized bed incinerator, the air preheater 7 connected to the cement rotary kiln, and the waste heat boiler 10 that collects the waste heat of the cement rotary kiln. The cement production system includes a cement decomposing furnace 13, a cement burning rotary kiln 12, and a cement kiln. The material cooling secti...

Example Embodiment

[0040] Example 2

[0041] Such as image 3 As shown, the air supply pipe of the air preheater has a trigeminal pipe structure, which is the flue gas inlet pipe of the cement calcination rotary kiln, the cooling air inlet pipe and the mixing pipe of the cement clinker cooling section. The flue gas inlet pipe of the cement calcining rotary kiln, the cooling air inlet pipe of the cement clinker cooling section and the mixing pipe are each equipped with flue gas valves. The remaining technical features are the same as in Example 1.

[0042] The cooling air in the cement clinker cooling section is used as a high-temperature gas due to the high temperature of the cement clinker, as the primary air of the fluidized bed incinerator, and has the effect of increasing the furnace inlet temperature and improving the heat utilization efficiency.

[0043] The remaining technical features are the same as in Example 1.

Example Embodiment

[0044] Example 3

[0045] Such as figure 2 As shown, the air preheater is segmented, divided into air preheater section I14 and air preheater section II15. The air preheater section I is connected to the tail flue of the fluidized bed incinerator, and the air preheater Section II is arranged in the cement clinker cooling section. The air supply pipe of the air preheater section I is a trigeminal pipe structure, which are the flue gas intake pipe of the cement calcining rotary kiln, the air preheater section II heat exchange air intake pipe and the mixing pipe. The three pipes are respectively equipped with flue gas Intake pipe control valve, heat exchange air intake pipe control valve and mixing pipe control valve. According to the fuel situation of the waste incinerator, the air intake ratio and air intake volume can be controlled in real time, so as to control the primary air volume and achieve the purpose of stable and efficient combustion.

[0046] The remaining technical fe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a thermodynamic method and a thermodynamic system for a cement kiln to realize cooperative treatment of domestic garbage and belongs to the technical field of garbage treatment. The thermodynamic method for the cement kiln to realize cooperative treatment of domestic garbage comprises the following steps of: (1) conveying the domestic garbage to an RDF manufacturing plant;(2) conveying RDF to a fluidized bed incinerator, wherein high-temperature flue gas generated in incineration enters a cyclone separator, passes through an over-heater, a coal economizer, a denitrating device and an air preheater after recycling a part of a fuel and then enters a decomposition furnace and a cement burning rotary kiln; and high-temperature steam generated by the over-heater entersa steam replenishing type steam turbine and is used for driving a generator to generate electricity; and (3) conveying furnace slags generated by garbage incineration to a cement kiln raw material storehouse and obtaining cement clinkers after cement burning and rotary kiln burning. The invention further provides the thermodynamic system for the cement kiln to realize cooperative treatment of thedomestic garbage; a cement production system and a garbage incineration system share one set of flue gas treatment equipment, so the investment is lowered, the cost is lowered, and the economical efficiency of the whole plant is improved.

Description

technical field [0001] The invention relates to a thermal method and a system for coordinating domestic garbage in a cement kiln, and belongs to the technical field of garbage treatment. Background technique [0002] The principle of using cement kilns to co-process municipal solid waste is similar to that of incineration power generation, which uses high temperature to process waste. Since the cement kiln temperature is higher than that of the waste incineration plant, on the one hand, the cement burning system can be used to digest the odor and toxic substances in the waste treatment process; Toxic substances can be decomposed into corresponding inorganic substances and heavy metals and solidified in cement clinker. The co-processing of solid waste in cement kilns is of great significance to both solid waste treatment and the development of the cement industry. [0003] The existing cement kiln synergistic treatment methods have the following problems: 1. Excessive utili...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F23G5/44F23G5/46F23J15/02F27D17/00
CPCF23G5/44F23G5/46F23J15/022F27D17/004Y02P10/25Y02P40/121
Inventor 张德昌戴宇晴
Owner 新弘源科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products