CN1189590A - Energy utilizing equipment of city and relative refuse - Google Patents

Abstract

A refuse recycling system which recycles municipal waste as energy, includes a shredder (1) for shredding the waste and removing rejects via a feed pipe to a circulating fluidized bed reactor (2), the reactor producing flue gases. The reactor includes a side dense fluidized bed situated on the wall of the reactor which is provided with the feed pipe, the side dense fluidized bed extracting non-fluidizable heavy elements and transporting them to a coarse-particle sorter apparatus (3) via an extraction duct disposed at a base of the side dense fluidized bed. At least a portion of the rejects from the shredder is fed into the coarse-particle sorter apparatus (3).

Description

The energy of city and relative refuse utilizes equipment

The energy of the rubbish that the present invention relates to the city and be correlated with utilizes equipment.

Exactly, the energy that the city that the present invention relates to reaches relevant rubbish utilizes equipment to comprise:

-one refuse breaking device of discharging residue,

-one ciculation fluidized bed reactor, receive broken rubbish by a feeder sleeve, a tight fluid bed of side is arranged having on the reactor wall of a broken rubbish supply pipe, a non-fluidisation heavy burder extraction tube that is arranged on the tight fluid bed base of this side is sent non-fluidisation heavy burder into the bulky grain screening plant, make their coolings and extract non-fluidisation inert substance, all the other materials re-enter in the reactor

-one energy reclaims and the treating apparatus of the cigarette that reactor is discharged.

This class reactor has disclosed in document FR-2735041.It has: one the first tight fluid bed of side, and the latter is positioned at and has on the reactor wall of a broken rubbish supply pipe with the gasification of carrying out broken rubbish; The tight fluid bed of second side that superheater is housed.A non-fluidisation heavy burder extraction tube that is arranged on the tight fluid bed base of first side is transported to the bulky grain screening plant with non-fluidisation heavy burder, makes their coolings and extracts non-fluidisation inert substance, and remaining material is sent in the reactor again.

In addition, the residue of breaker discharge must be handled recycling.Residue need leave 2 grades of soots in, this means expensive processing.

But the present invention's head it off, for this reason, according to the present invention, the described residue of at least a portion is sent in the described bulky grain screening plant.

These materials that are sent to the bulky grain screening plant cool off the non-fluidisation heavy burder that comes autothermal reactor.Conversely, they oneself are subjected to about 400 to 500 ℃ heat treatment, make them remove organic matter, make them come out just can directly recycle from the bulky grain screening plant, need not to expend heat energy, therefore do not reduce the gross efficiency of equipment.

According to a preferred embodiment, equipment has a sorting unit, and the latter is divided into first with the choosing of described residue and is infected with seldom that organic inert substance stream and second is infected with organic inert substance stream or flammable heavy burder flows.

In this case, its advantage is that the described first inert substance stream is introduced in the described bulky grain screening plant.

Advantageously:

---described reactor is equipped with a granule screening plant that links to each other with the heap base,

---equipment has a screening crusher that receives second material stream,

---the granule that screening crusher produces is sent to the granule screening plant.

These granules contain the organic principle that can be used for the burning of fluidisation inert substance, and the content of its inert substance can reduce the consumption of the sand that constitutes the reactor base.In the granule screening washer, granule is subjected to heat treatment, guaranteeing their cleaning, and they can be recycled as slag.

Introduce the present invention in detail by means of the accompanying drawing of a preferred embodiment of the present invention below.

Fig. 1 is the overall pattern that utilizes equipment of municipal refuse of the present invention.

As shown in Figure 1, city and relevant rubbish energy utilize equipment to comprise a ciculation fluidized bed reactor 2 that receives broken rubbish.This reactor is preferably the sort of type described in the document FR-2735041, has: one the first tight fluid bed 2A of side, the latter are positioned at and have on the wall of a broken rubbish supply pipe with the reactor that carries out broken refuse gasification; The tight fluid bed 2B of second side that is equipped with superheater.A non-fluidisation heavy burder extraction tube that is arranged on the tight fluid bed 2A of first side bed base is transported to bulky grain screening plant 3 with non-fluidisation heavy burder, makes their coolings and extracts non-fluidisation inert substance, and remaining material is sent in the reactor 2 again.

Upstream at reactor 2, raw refuse is sent in the feed preparing device 1, guarantee on the one hand rubbish by for example having the shear fragmentation of one or two rotation scissors, guarantee on the other hand to adopt for example magnetic force and induction and/or cartridge type separator to choose inert substance and may cause the material (iron content, nonferrous, rubble, glass) of bonding according to the source of pending rubbish.

Broken rubbish is sent in the reactor 2, and residue divides in the sorting unit 4 that preferably is made of gravity or gas classification device elects two strands of material streams as.

First strand of inert substance stream of seldom being infected with organic matter (glass, rubble, scrap iron piece) is sent to bulky grain screening plant 3 to be mixed with the hot material that comes autothermal reactor 2, and makes the non-fluidisation inert substance cooling of autothermal reactor 2.They are subjected to can be described as about 400 to 500 ℃ heat treatment that heat is cleaned, to remove organic matter.

Thereby the solid residue logistics 8 that acquisition is made of inertia of removing organic matter, seldom oxidation and/or bulky grain (stone, glass, pottery, scrap iron) material below bulky grain screening plant 3, this helps their recirculation.

Second burst of phosphorus content of being infected with organic inert substance or flammable heavies stream can not recycle greater than 5%, is displaced into screening crusher 5 by the first outlet S1, and the latter is installed on the current pipe of the control of leading to fusing and vitrified stove 6.

Tight fluid bed 2A has a pyrolysis gas extraction chamber 2A ' pyrolysis gas by conduit 7 injection fusing/vitrifying stoves 6 that separate with the combustion gas main flow in first.

Reactor 2 also assembles a granule screening plant 9, and the ashes of the separable reactor of the latter 2 bottoms also make the solid particle of granularity and fluidisation compatibility recycle in reactor.Device 9 granules that also are used for refilling from screening crusher 5.These granules contain the organic principle that also can be used for the burning of fluidisation inert substance, and its inert material content can reduce the consumption of the sand that constitutes reactor 2 heaps base.These granule residues circulate in the granule screening plant and can also heat clean non-fluidisation thing.Available slag 10 is discharged from granule screening plant 9.

Therefore, the quality of residue by means of from the supporting bulky grain screening plant 3 of reactor 2 and granule screening plant 9 by being improved.Such residue need not to leave in 2 grades of soots.

Cigarette circulates in the following array apparatus in reactor 2 downstreams:

---solid cyclone separator 11;

---recovery boiler 15, it receives the gas of cyclone separator 11 outputs, is equipped with one first heat exchange parts 18, exactly is an evaporimeter, and this boiler has a dedusting funnel sieve 15A who discharges solid particle from the second outlet S2;

---second cyclone separator 16, be used to carry out the hot dedusting of cigarette, solid particle is from outlet S2 ' discharge;

---second heat exchanger assembly 23 exactly is an energy-saving appliance, and it is arranged in the receiver gases chamber 22;

---the final treating apparatus of gas, the solid matter after the processing is by at least one group the 3rd outlet S3 ' and S3 " discharge.

Specifically, final treating apparatus comprises: a filter 17, preferably be furnished with the cartridge filter of activated carbon injection device, and solid particle is from outlet S3 ' discharge; Wash cigarette device 19 for one, detergent block is from outlet S3 " to discharge, the cigarette after the purification is discharged from chimney 30.

Wash cigarette device 19 and be furnished with sewage-treatment plant 21.

Above-mentioned all outlet S1 to S3 " all link to each other with fusing/vitrifying stove 6 by the current pipe of control, these pipes are independent of the aforementioned main line of equipment.

Melting capacity in the device 6 is provided by the pyrolysis gas that obtains in fluid bed 2A, also can provide by supplying with plastic refuse 20, and plastic refuse can contain a large amount of heat energy from packing recirculation extrusion die, its waste material (packing that stains).The combustion adjuvant of melting furnace 6 can be air or air oxygenation according to required temperature.Under second kind of situation, the oxygenation air is provided by diaphragm block 21, and the deoxidation part then is used for the fluidisation of screening plant 3,9 and fluidized-bed reactor 2.

From the granularity of the flying dust of the outlet S3 ' of the outlet S2 ' of the outlet S2 of recovery boiler 15, cyclone separator 16, filter 17 and from the outlet S3 that washes cigarette device 19 " the granularity of detergent block allow these materials directly to inject fusing/vitrifying stove 6.Otherwise the granularity that is used to carry out the residue of the sorting unit 4 that rubbish gets the raw materials ready then differs widely and may be very big, therefore needs screening crusher 5 between outlet S1 and fusing/vitrifying stove 6.

According to the quantity and the desired fusing point of pending material, the method for designing of fusing/vitrifying stove 6 can be different.

It can be the sort of type described in the document FR-2716524, can treat vitrified two parts, the bulky grain that promptly comes from the residue of general seldom coalescent heavy metal partly reach the powder part from be infected with more flying dust, extracted respectively control melt.

Utilize the waste water after the sewage disposal 21 to add water with the compensate for evaporation dehydration for the quenching tank of fusing/vitrifying stove 6, this makes the best that can regulate its pH value and assurance heavy metal not dissolve.

Advantageously, cooling line 24 gives off the heat energy of vitrifying groove, heats to supplying with water being used for again.

Claims (4)

1. the city reaches the energy use device of relevant rubbish, comprising:

-one refuse breaking device (1) of discharging residue,

-one ciculation fluidized bed reactor (2), it receives broken rubbish by a feeder sleeve, a tight fluid bed of side is arranged on the wall of the reactor that has a broken rubbish supply pipe, a non-fluidisation heavy burder extraction tube that is arranged on the tight fluid bed base of this side is sent non-fluidisation heavy burder into bulky grain screening plant (3), make their coolings and extract non-fluidisation inert substance, remaining material re-enters in the reactor (2)

-one energy reclaims and the treating apparatus of the cigarette that described reactor (2) is discharged,

It is characterized in that the described residue of at least a portion is sent in the described bulky grain screening plant (3).

2. device according to claim 1 is characterized in that, it has a sorting unit (4), described residue branch is elected as seldom be infected with organic first inert substance stream and be infected with organic second inert substance stream or flammable heavy burder stream.

3. equipment according to claim 2 is characterized in that, the described first inert substance stream is sent in the described bulky grain screening plant (3).

4. equipment according to claim 2 is characterized in that,

-described reactor (2) is furnished with a granule screening plant (9) that links to each other with the heap base,

-equipment has a screening crusher (5) that receives second material stream,

-screening crusher (5) produce granule send in the granule screening plant (9).