CN207907245U - A kind of anti-coking structure of secondary combustion chamber - Google Patents

Abstract

The utility model provides a kind of anti-coking structure of secondary combustion chamber, it can reduce thermal expansion and the influence to equipment and materials, extend the maintenance period and service life of equipment of equipment and materials, and flue gas can be promoted to be sufficiently mixed burning, reduction and slagging prevention simultaneously reduce operating cost;It includes Burning Room and ash bucket, the Burning Room upper portion side wall is equipped with exhanst gas outlet, the hopper bottom is exported equipped with lime-ash, the Burning Room is located at the ash bucket top, and connected by expansion joint by form venturi tube structure, the exhanst gas outlet axis and be at least in not less than 60 ° of obliquity structure between side internal face and horizontal plane in the ash bucket in the lime-ash exit.

Description

A kind of anti-coking structure of secondary combustion chamber

Technical field

The utility model is related to solid waste burning processing technology field, specially a kind of anti-coking structure of secondary combustion chamber.

Background technology

Currently, being generally equipped with secondary combustion chamber in solid waste burning system, it is therefore an objective to be created by the combustion chamber necessary Burning condition reduces environmental pollution to reduce the production quantity of incineration tail gas Zhong bioxin.

Existing secondary combustion chamber（Abbreviation dual firing chamber）Have pyramidal structure, an isometrical barrel-like structure, specifically by Burning Room and Ash bucket is welded, and in practical applications, the dual firing chamber of both structures can all send out under 950 ~ 1200 DEG C of high temperature operating conditions Caloricity expands, and to solve the problems, such as this, is typically supported on the top of dual firing chamber or lower part outer wall setting support element, to So that inflationary spiral is discharged toward a direction, but also can swell increment all be concentrated at the direction, total swell increment is larger, It to be unfavorable for the connection of dual firing chamber and upstream device, while thermally expanding acutely, internal refractories are formed with external Steel material Differential expansion, be easy to cause castable fall off or Steel material destroy, shorten refractory material maintenance period and equipment integrally use the longevity Life；In addition, dual firing chamber is when using isometrical barrel-like structure, flue gas flow rate can also be constrained by whole bore, it is difficult to be realized to burn and be helped Combustion wind and flue gas are sufficiently mixed, and are unfavorable for the abundant burning of indoor flue gas.

Secondly, for ease of ash discharge slag, ash bucket generally uses ship type ash bucket or closing in cone bucket with reducing or chamfering, but The ash bucket of both forms can all quickly form bulk coking；Secondly as the inclination angle of ash bucket the big more easy-to-discharge slag, but also simultaneously The whole height of ash bucket can be made to increase, to be unfavorable for the arrangement of equipment, be also unfavorable for matching connection with downstream slag-tapping device.

In addition, the solid waste type of dual firing chamber's disposition is various, property is complicated, often contain largely by alkalinous metal and halogen The low melting point salt that prime element generates, under the high temperature conditions, these low melting point salts are in molten condition, and molten state salt is easy to Coking can be formed in the entry and exit side-walls cooling accumulation of combustion chamber；The exhanst gas outlet of dual firing chamber connects downstream by flue When equipment, due to being restricted by device structure and bracing members, generally use big elbow flue or short gooseneck flue more, this two Although kind of a structure reduces horizontal segment as far as possible, the inner wall lower of smoke outlet is arc gentle slope, and molten salts is in flue gas Drive under constantly wash away inner wall, it is inevitable to be stopped in the gentle slope position long period, will form bulk coking after cooling accumulation, And can be tightly combined with equipment inner wall after coking cooling, it is difficult to Hand scarf, it is necessary to which blowing out carries out manual cleaning, takes time and effort Increase a large amount of operating costs, also influences the normal use of equipment.

Invention content

In view of the above-mentioned problems, the utility model provides a kind of anti-coking structure of secondary combustion chamber, it is swollen heating power can be reduced Influence swollen and to equipment and materials, extends the maintenance period and service life of equipment of equipment and materials, and flue gas can be promoted abundant It is mixed and burned, while reduction and slagging prevention, reduces operating cost.

Its technical solution is such：It includes Burning Room and ash bucket, and the Burning Room upper portion side wall is equipped with exhanst gas outlet, The hopper bottom is exported equipped with lime-ash, it is characterised in that：The Burning Room is located at the ash bucket top, and is connected by expansion joint Connect and form venturi tube structure, the exhanst gas outlet axis and in the ash bucket in the lime-ash exit at least It is in the obliquity structure not less than 60 ° between side internal face and horizontal plane.

It is further characterized by：

The Burning Room and ash bucket outer wall are both provided with bearing, and the outer diameter of the expansion joint is respectively less than the ash bucket, burning The outer diameter of room, the outer diameter of the ash bucket are more than the outer diameter of the Burning Room；

The ash bucket is rectangular, and the ash bucket lower flange is connected with interface of slagging tap；

The Burning Room upper flanges are connected with explosion-proof door interface, and head cover, the head cover are housed on the explosion-proof door interface Using the flexible high-temperature resistants sealing material such as alumina silicate fibre；

The expansion joint is using high temperature resistant composites such as coverings.

The utility model has the beneficial effects that Burning Room and ash bucket form venturi tube structure by the way that expansion joint connects, By intermediate expansion joint, thermal expansion can be buffered, to weaken adverse effect of the thermal expansion to equipment, is reduced in equipment The risk that portion's refractory material falls off and external Steel material destroys, improves the service life of equipment, and by venturi tube structure, Flue gas flow rate can be increased, be conducive to burn being sufficiently mixed for combustion air and flue gas, flue gas is promoted fully to be burned in burning；And cigarette Gas outlet axes and be at least in being not less than between side internal face and horizontal plane in the ash bucket in lime-ash exit 60 ° of obliquity structure then can reduce and prevent low melting point salt or lime-ash to be adhered to inner wall and form coking, greatly reduce Operating cost and blowing out risk have good on-road efficiency.

Description of the drawings

Fig. 1 is the main structure diagram of the utility model；

Fig. 2 is the side structure schematic view of the utility model.

Specific implementation mode

As shown in Figure 1 and Figure 2, the utility model includes Burning Room 1 and ash bucket 2, and Burning Room 1 and 2 outer wall of ash bucket are both provided with Bearing 3,1 upper portion side wall of Burning Room are equipped with exhanst gas outlet 4, and 2 bottom of ash bucket is equipped with lime-ash and exports 5, and Burning Room 1 is located on ash bucket 2 Side, and connected by expansion joint 6 by form venturi tube structure, wherein expansion joint 6 uses the high temperature resistant composites such as covering, The outer diameter of expansion joint 6 is respectively less than the outer diameter of ash bucket 2, Burning Room 1, and the outer diameter of ash bucket 2 is more than the outer diameter of Burning Room 1；Then by swollen Swollen section 6 realizes that Burning Room 1 is discharged with 2 thermal expansion of ash bucket to middle part, can buffer thermal expansion, and reduce thermal expansion to equipment The risk that internal refractories fall off and external Steel material destroys, improves the service life of equipment, and pass through Venturi tube knot Structure can increase flue gas flow rate, be conducive to burn being sufficiently mixed for combustion air and flue gas, flue gas is promoted fully to be burned in burning； It is the obliquity structure in 65 ° between 4 axis of exhanst gas outlet and horizontal plane, is located at side internal face in the ash bucket 2 at lime-ash outlet 5 For in 65 ° of obliquity structure, ash bucket 2 is rectangular between horizontal plane, three internal faces of ash bucket 2 are each perpendicular to horizontal plane, and three Section inner vertical walls can also reduce coking to greatest extent, then can utmostly reduce molten state low melting point salt or lime-ash is adhered to The residence time of inner wall prevents its cooling aggregation from forming coking, greatly reduces operating cost and blowing out risk, have good On-road efficiency.

Flanged joint has interface 7 of slagging tap at 2 lower part lime-ash outlet 5 of ash bucket；1 upper flanges of Burning Room are connected with explosion proof door and connect Mouthfuls 8, head cover 9 is housed on explosion-proof door interface 8, head cover 9 passes through explosion proof door using flexible high-temperature resistants sealing materials such as alumina silicate fibres The explosion proof door that interface 8 connects has hydraulic cylinder or cylinder driving mechanism, using weight stack come the pressure of balance hydraulic cylinder or cylinder, Pressure balance is specifically formed by hydraulic cylinder or cylinder and clump weight, pressure difference may be configured as combustion chamber safe pressure limit.

Claims (5)

1. a kind of anti-coking structure of secondary combustion chamber comprising Burning Room and ash bucket, the Burning Room upper portion side wall are equipped with flue gas Outlet, the hopper bottom are exported equipped with lime-ash, it is characterised in that：The Burning Room is located at the ash bucket top, and by swollen The connection of swollen section and form venturi tube structure, the exhanst gas outlet axis and in the ash bucket in the lime-ash exit At least it is in the obliquity structure not less than 60 ° between side internal face and horizontal plane.

2. a kind of anti-coking structure of secondary combustion chamber according to claim 1, it is characterised in that：The Burning Room and ash bucket Outer wall is both provided with bearing, and the outer diameter of the expansion joint is respectively less than the outer diameter of the ash bucket, Burning Room, and the outer diameter of the ash bucket is big In the outer diameter of the Burning Room.

3. a kind of anti-coking structure of secondary combustion chamber according to claim 1, it is characterised in that：The ash bucket is rectangular, The ash bucket lower flange is connected with interface of slagging tap.

4. a kind of anti-coking structure of secondary combustion chamber according to claim 1, it is characterised in that：Hold-carrying on the Burning Room Orchid is connected with explosion-proof door interface, head cover is housed, the head cover is using the flexible resistance to height such as alumina silicate fibre on the explosion-proof door interface Warm sealing material.

5. a kind of anti-coking structure of secondary combustion chamber according to claim 1, it is characterised in that：The expansion joint is using illiteracy The high temperature resistant composites such as skin.