CN217636837U

CN217636837U - Novel steel slag waste heat boiler

Info

Publication number: CN217636837U
Application number: CN202221642658.9U
Authority: CN
Inventors: 张树伟; 张诗妍; 张健
Original assignee: Qingdao Quanneng Boiler Co ltd
Current assignee: Qingdao Quanneng Boiler Co ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-10-21
Anticipated expiration: 2032-06-28

Abstract

The utility model relates to a slag waste heat utilization technical field, and a novel slag waste heat boiler is disclosed, the inside of boiler body is provided with furnace radiation room, furnace radiation room's bottom grate device, the slag import has been seted up on the side upper portion of boiler body, the below of slag import is provided with the air quenching air import, the bottom of boiler body is provided with defeated sediment machine, steam pocket equidistance intercommunication has the downcomer, the front end of boiler body is provided with the burn-off room, the inside top-down of burn-off room is equipped with evaporimeter and economizer respectively, the top of boiler body is linked together with the burn-off room through stainless steel connecting flue, the bottom of burn-off room is provided with the sump pump, reliable stove bottom scarfing cinder device has been set up, avoid stove bottom slag to pile up and block up defeated sediment device, cause the shut-down accident, guarantee slag waste heat boiler recovery rate and operating stability, the air quenching of adoption, the waste heat utilization mode, a large amount of heat that contains in the slag has been retrieved, the slag recovery efficiency has been improved.

Description

Novel steel slag waste heat boiler

Technical Field

The utility model relates to a slag waste heat utilization technology field specifically is a novel slag waste heat boiler.

Background

After steel is smelted in an electric arc furnace, a large amount of high-temperature steel slag can be generated, the temperature of the steel slag is 1400 ℃, the steel slag is in a molten state, 1.2GJ of sensible heat can be recovered from each ton of the steel slag, which is about equivalent to the heat generated after 41kg of standard coal is completely combusted, and a special steel slag waste heat boiler is needed for recovering the waste heat of the steel slag to achieve resource utilization.

The conventional boiler usually adopts a roller method to treat the high-temperature steel slag, when the boiler is used, the particle size of the treated solid slag is larger, so that the heat recovery rate is reduced due to the smaller heat transfer coefficient between gas and liquid and between gas and solid, and the treated steel slag is easy to accumulate at the bottom of the boiler, so that the blockage of a slag conveying device is caused, and the shutdown fault is caused, so that the running stability of the steel slag waste heat boiler is reduced, and the novel steel slag waste heat boiler is provided.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a novel steel slag waste heat boiler to solve the problems existing in the background technology.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel slag exhaust-heat boiler, includes the boiler body, the inside of boiler body is provided with furnace radiation chamber, furnace radiation chamber's bottom grate device, the slag import has been seted up on boiler body's side upper portion, the below of slag import is provided with the import of air quenching, boiler body's bottom is provided with defeated sediment machine, boiler body's top is provided with the steam pocket, steam pocket equidistance intercommunication has the downcomer, boiler body's front end is provided with the burn-off chamber, the inside top-down of burn-off chamber is equipped with evaporimeter and economizer respectively, boiler body's top is connected the flue through stainless steel and is linked together with the burn-off chamber, the bottom of burn-off chamber is provided with the barn pump.

Preferably, the boiler body is a natural circulation steam boiler and adopts a membrane wall fully-closed structure.

Preferably, the bottom of the grate device is provided with an air chamber, the outside of the boiler body is provided with an air blower, and the air blower is communicated with the air chamber through an air duct.

Preferably, the number of the evaporator tube rows and the number of the evaporator tube rows are three, the number of the economizer tube rows and the number of the economizer tube rows are two, the evaporator tube rows and the economizer tube rows are both toothed spiral fin tubes and are sequentially arranged, and the evaporators and the economizers are both provided with sound wave ash cleaning devices.

Preferably, the bottom of the burnout chamber is communicated with a turning flue, and an induced draft fan is additionally arranged between the burnout chamber and a smoke inlet of the turning flue.

Preferably, the stainless steel connecting flue is additionally provided with a stainless steel expansion joint.

(III) advantageous effects

Compared with the prior art, the utility model provides a novel slag exhaust-heat boiler possesses following beneficial effect:

this novel slag exhaust-heat boiler, come to smash the slag through the mode that adopts the air quenching, prevented to lead to the reduction of heat recovery rate because of solid-state sediment particle diameter is great, and air admission after the slag heating burns off the room, and the multiunit bank of tubes through inside the adding of evaporimeter and economizer has improved the radiation heat transfer effect, heat recovery rate has further been increased, finally the heat through exhaust-heat boiler absorption slag and hot-air produces steam, in order to external output power or heat, thereby the improvement of slag recovery efficiency has been realized, the grate device of adding the establishment can prevent that the stove bottom from blockking up the defeated sediment device and causing the blowing-out accident because of the slag pile up, slag exhaust-heat boiler operating stability has been ensured, it is low to have avoided conventional boiler recovery efficiency, the easy slag jam of taking place leads to the fact blowing out trouble scheduling problem.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 1 according to the present invention;

fig. 4 is an enlarged schematic view of the structure at B in fig. 2 according to the present invention.

In the figure: 1. a boiler body; 2. a hearth radiation chamber; 3. a steel slag inlet; 4. a wind quenching wind inlet; 5. a slag conveyor; 6. a steam drum; 7. a down pipe; 8. a burnout chamber; 9. an evaporator; 10. a coal economizer; 11. the stainless steel is connected with the flue; 12. a bin pump; 13. an evaporator tube bank; 14. and (4) arranging the economizer pipes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figures 1 and 2, the utility model provides a technical scheme, a novel steel slag waste heat boiler comprises a boiler body 1, the boiler body 1 is a natural circulation steam boiler and adopts a membrane wall totally-enclosed structure, a hearth radiation chamber 2 is arranged in the boiler body 1, a bottom grate device of the hearth radiation chamber 2 is arranged at the bottom of the grate device, an air blower is arranged outside the boiler body 1 and is communicated with the air chamber through an air duct, the air blower sends cold air into the air chamber through the air duct to further cool steel slag falling into the grate to below 200 ℃, a steel slag inlet 3 is arranged at the upper part of the side surface of the boiler body 1, an air quenching air inlet 4 is arranged below the steel slag inlet 3, a slag conveyor 5 is arranged at the bottom of the boiler body 1, as shown in figures 3 and 4, the top of the boiler body 1 is provided with a steam pocket 6, the steam pocket 6 is communicated with a down pipe 7 at equal intervals, a burnout chamber 8 is arranged at the front end of the boiler body 1, an evaporator 9 and a coal economizer 10 are respectively arranged from top to bottom, the top of the boiler body 1 is connected with the flue 8 through a stainless steel slag feeding pipe, and a spiral exhaust pipe 14, the bottom of the coal feeding pipe is arranged as three groups of the expansion flue, and the flue is arranged in turn, and the boiler body 14, the bottom of the boiler is provided with the coal feeding device is arranged in turn of the coal feeding pipe, and is arranged as a draft fan, the expansion flue 14, be convenient for improve boiler efficiency, prevent that the deposition from blockking up evaporimeter 9 and economizer 10 all set up the sound wave ash removal device, the ash removal device can guarantee the cleanliness of heat-transfer face, smash the slag through the mode that adopts the air quench, prevented to lead to the reduction of heat recovery rate because of solid-state slag particle diameter is great, and air after the slag heating gets into evaporimeter 9 and economizer 10, its inside multiunit bank of tubes that adds establishes has improved the radiation heat transfer effect, further increased heat recovery rate, finally, absorb the heat of slag and hot-air through exhaust-heat boiler and produce steam, with external output power or heat, thereby realized the improvement of slag recovery efficiency, the grate device who adds establishes can prevent the stove bottom from leading to the fact the shut-down accident because of the slag conveying device is blockked up to the slag, slag exhaust-heat boiler operational stability has been ensured, the conventional boiler recovery efficiency is low, the easy problem that the slag jam leads to the fact the shut-down furnace trouble that has been avoided.

The working principle of the device is as follows: when the waste heat boiler is used, high-temperature steel slag is poured in from a steel slag inlet 3, cold air enters a waste heat hearth from an air quenching air inlet 4, the steel slag falls into the bottom of the boiler after being cooled and crushed in a hearth radiation chamber 2, grate cooling air enters the waste heat hearth from the bottom of a slag conveyor 5, the steel slag is further cooled and discharged out of the boiler so as to be recycled, high-temperature flue gas generated by heating the high-temperature steel slag enters a burnout chamber 8 through a stainless steel connecting flue 11, the radiation heat exchange effect is improved by an evaporator 9, an economizer 10 and a plurality of groups of added pipe rows, the heat recovery rate is increased, the pipe rows are toothed spiral fin pipes and are arranged in sequence, the boiler efficiency is improved, dust accumulation and blockage are prevented, the evaporator 9 and the economizer 10 are both provided with sound wave dust cleaning devices, the dust cleaning devices can ensure the cleanliness of heat exchange surfaces, and the flue gas is finally discharged from turning flues.

It is noted that, in the text, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel slag exhaust-heat boiler, includes boiler body (1), its characterized in that: the boiler comprises a boiler body (1), wherein a hearth radiation chamber (2) is arranged inside the boiler body (1), a bottom grate device of the hearth radiation chamber (2) is arranged on the upper portion of the side face of the boiler body (1), a steel slag inlet (3) is formed in the upper portion of the side face of the boiler body (1), an air quenching inlet (4) is formed in the lower portion of the steel slag inlet (3), a slag conveying machine (5) is arranged at the bottom of the boiler body (1), a steam drum (6) is arranged at the top of the boiler body (1), descending pipes (7) are communicated with the steam drum (6) in equidistance mode, a burnout chamber (8) is arranged at the front end of the boiler body (1), an evaporator (9) and a coal burner (10) are respectively arranged from top to bottom of the burnout chamber (8) from top to bottom, a stainless steel connecting flue (11) is communicated with the burnout chamber (8), and a bin pump (12) is arranged at the bottom of the burnout chamber (8).

2. The novel steel slag waste heat boiler as claimed in claim 1, characterized in that: the boiler body (1) is a natural circulation steam boiler and adopts a membrane wall fully-closed structure.

3. The novel steel slag waste heat boiler as claimed in claim 1, characterized in that: an air chamber is arranged at the bottom of the grate device, an air blower is arranged outside the boiler body (1), and the air blower is communicated with the air chamber through an air duct.

4. The novel steel slag waste heat boiler as claimed in claim 1, characterized in that: the inside of evaporimeter (9) is with the quantity that is equipped with evaporimeter bank of tubes (13) and is three groups, the inside of economizer (10) is with the quantity that is equipped with economizer bank of tubes (14) and is two sets of, evaporimeter bank of tubes (13) are gullet spiral fin pipe and adopt the order to arrange with economizer bank of tubes (14), evaporimeter (9) all set up sound wave ash removal device with economizer (10).

5. The novel steel slag waste heat boiler as claimed in claim 1, characterized in that: the bottom of the burnout chamber (8) is communicated with a turning flue, and an induced draft fan is additionally arranged between the burnout chamber (8) and a smoke inlet of the turning flue.

6. The novel steel slag waste heat boiler as claimed in claim 2, characterized in that: the stainless steel connecting flue (11) is additionally provided with a stainless steel expansion joint.