CN2556496Y

CN2556496Y - Harmless smoke treating device comined cement rotary kiln with house refuse incinerator

Info

Publication number: CN2556496Y
Application number: CN 02244395
Authority: CN
Inventors: 江瑞莲
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-09
Filing date: 2002-08-09
Publication date: 2003-06-18
Anticipated expiration: 2012-08-09

Abstract

The utility model relates to a harmless gas processing device which integrates a cement rotary kiln with a domestic refuse incinerator, comprising the part of the cement rotary kiln with a multi-graded whirl drum preheater and a predecomposition furnace and the part of the domestic refuse incinerator. The two parts are connected with an exhaust connection tube preserved at one side of the predecomposition furnace of the cement rotary through a refuse incineration gas pipe; the predecomposition furnace is connected with a jet burner supplying a secondary energy, a fuel conveyance tube and a tertiary air duct from a rotary kiln clinker cooler to supplement energy. The utility model combines refuse processing and cement production, which can save large investment, operation cost and energy and realize strategic objectives of harmlessness, minimization and reclamation.

Description

A kind of innoxious flue gas processing device that cement rotary kiln is combined with domestic waste incineration

(1) technical field: the utility model relates to a kind of innoxious flue gas processing device that cement rotary kiln is combined with domestic waste incineration, belongs to environmental protection, the twice laid technical field.

(2) background technology: current domestic waste increases sharply with annual 8%～10% speed, has not only satisfied requirement by accumulation and burying method disposal of refuse; And the disposal of refuse of the mode of burning can reach the purpose of minimizing and resource, thus comparatively fast developed, but contain SO in the flue gas behind the present consumer waste incineration ₂, sour gas such as HCl, HF, NOx, heavy metal particle and poisonous chlorination organic matter are as bioxin, deal with improperly and can cause secondary pollution, so essential equipment one overlaps the gas cleaning dust arrester behind incinerator, doing like this to increase a lot of equipment, the operating cost height, investment is high.

(3) summary of the invention: the purpose of this utility model provides a kind of flue gas processing device that cement rotary kiln is combined with domestic waste incineration.

Prove that according to theory and practice when producing cement, rotary kiln just has sour gas in the flue gas that the kiln tail is discharged, but through the kiln tail give hot device, predecomposition furnace and humidification dust collecting system after, in exhaust gas discharged, SO ₂Amount atomic, have only 30～40mg/Nm ³, even special desulphurization plant also difficulty reach this index.The utility model is the high-temperature flue gas that burning domestic garbage produces to be fed cement kiln end give hot device bottom, gas flow temperature is more than 850 ℃ in the preheater, the solid concentration height, particle is superfine, and existing 70～80% calcium carbonate is broken down into CaO and CO in the big raw material powder of specific area ₂, it can with the rubbish flue gas reverse movement that rises in the bottom in fully mix HCl wherein, HF, SO ₂, Nox gas and CaO reaction generates CaCl ₂, CaF ₂And CaSO ₄Deng, a small amount of poisonous organic matter bioxin etc. just decompose at 750 ℃, and the heavy metal particles thing is captured, and absorb, finally sneak in the clinker, the rubbish flue gas is giving hot device and is giving in the dore furnace stopping and reach tens seconds, can guarantee that reaction thoroughly, gives the waste gas that hot device comes out from cement, cool off rapidly through wet-type absorption tower again, through gathering dust, enter the flue gas of atmosphere again, reach nontoxic purpose substantially.

Formation of the present utility model is shown in figure one, and band multistage cyclone tube gives hot device, and the dry method cement rotary kiln and the domestic waste incineration that give dore furnace are prior art; Incinerator (8) gives dore furnace (2) one sides by flue gas of refuse burning pipeline (8a) and cement kiln and gives the flue gas of refuse burning that stays and take over (2C) and link to each other; Giving that dore furnace (2) part is connected to burner that secondary energy sources are provided and fuel tube (2a) and from the tertiary-air pipe (2b) of rotary kiln (3) chamotte cooler again.

Cement slurry enters the multistage cyclone tube from feed pipe (4) and gives hot device (1), enters and gives dore furnace (2), CaCO through giving heat ₃Have 70～80% to give decomposition, solids enters cement burning rotary kiln and chamotte cooler (3) from the kiln tail, add that with the flue gas that gives hot device (1) and predecomposition furnace (2) flue gas that comes from incinerator (8) mixes from giving the rising of thermal decomposition system from the flue gas of (3) next calcining cement, forward the flue gas humidification absorption reaction tower (5) of holding concurrently to from the top, water absorbs SO in the tower ₂, SO ₃, NO ₂, H ₂S, and with CaO reaction, humidification is to improve electrostatic dust collection efficient simultaneously.Enter electrostatic precipitator (6) from the flue gas humidification flue gas that absorption reaction tower (5) comes out of holding concurrently, the later flue dust of humidification is accepted, flue gas after being purified enters atmosphere through exhaust blower and blow-down stack.

Advantage of the present utility model:

1. it is nearly 2/3 to reduce the investment of waste incineration factory, reduces operating cost 80%, and the incinerator of rubbish is built in the cement plant, can reduce capital construction and operating cost.

2. temperature can reach 1000 ℃ the flue gas of burning away the refuse and feeds cement kiln end and give in the hot device, can save energy consumption.

3. the lime-ash of burning away the refuse has only 10% of former quantity of refuse, can or produce other building material mades as cement mixture.

4. the cement plant disposal of refuse still can obtain the economic benefit and the preferential tax revenue of government department.

(4) description of drawings:

Fig. 1 is a formation schematic diagram of the present utility model.

(5) specific embodiment:

Have multiple because the multistage cyclone tube of rotary kiln gives hot device (1), two, three, level Four is applicable to the utility model, its arrangement mode can all can be used for the utility model with single-row, biserial and single two mixed row, and giving dore furnace has vertical barrel, fluidized bed type, spiral-flow type, the formula of spurting and the eddy flow combined type of spurting all to can be used for the utility model; And for domestic waste incineration, can select existing fluidized bed furnace formula, kiln formula, grate-type etc. for use, also there is numerous embodiments available.

Claims

1. innoxious flue gas processing device that cement rotary kiln is combined with domestic waste incineration, comprise that containing the multistage cyclone tube gives hot device, the dry-process rotory kiln of preheating decomposition furnace and domestic waste incineration is characterized in that: incinerator (8) gives dore furnace (2) one sides by flue gas of refuse burning pipeline (8a) and cement kiln and gives the flue gas of refuse burning that stays and take over (2C) and link to each other; Giving that dore furnace (2) part is connected to burner that secondary energy sources are provided and fuel tube (2a) and from the tertiary-air pipe (2b) of rotary kiln (3) chamotte cooler again.