CN111649314A

CN111649314A - Box structure of natural circulation ferrosilicon waste heat boiler

Info

Publication number: CN111649314A
Application number: CN202010593846.6A
Authority: CN
Inventors: 杨琴; 孙建涛; 田忠权; 顾浩东
Original assignee: Jiangsu Taihu Boiler Co Ltd
Current assignee: Jiangsu Taihu Boiler Co Ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2020-09-11
Also published as: WO2021258647A1

Abstract

The invention discloses a box body structure of a natural circulation ferrosilicon waste heat boiler, which consists of a box body, an upper collecting box, a communicating pipe, an upper collecting box, an upper sealing shell, a lower collecting box, a dust falling hopper, a pipe bundle and an inspection door, wherein the box body is vertically arranged and adopts a modular structure; the box body structure of the natural circulation ferrosilicon waste heat boiler adopts a box body structure, is very convenient to assemble on site, and greatly shortens the installation period; the boiler depends on natural circulation, the traditional mode of depending on a circulating pump is abandoned, the production cost and the operation cost of the boiler are greatly reduced, the operation difficulty of workers is also reduced, and the purposes of saving energy, reducing consumption and reducing cost are fully realized.

Description

Box structure of natural circulation ferrosilicon waste heat boiler

Technical Field

The invention relates to the field of waste heat boilers, in particular to a box body structure of a natural circulation ferrosilicon waste heat boiler.

Background

The waste heat boiler comprises a boiler barrel, a movable smoke hood, a furnace mouth section flue, an oblique 1 section flue, an oblique 2 section flue, a last 1 section flue, a last 2 section flue, a charging pipe (discharging chute) groove, an oxygen lance mouth, a nitrogen sealing device, a nitrogen sealing plug, a manhole, a micro-differential pressure taking device, a support of the flue, a hanger and the like. The waste heat boiler is divided into six circulation loops, each circulation loop consists of a down pipe and an up pipe, feed water of each section of flue is introduced into a lower header of each flue from the boiler barrel through the down pipe and then enters each heating surface, and steam generated by water passing through the heating surfaces enters an inlet header and then is introduced into the boiler barrel through the up pipe. All the flues are connected by flanges;

high-temperature flue gas released by burning coal is conveyed to an inlet of a waste heat boiler through a flue, then flows through a heater, an evaporator and an economizer, and is discharged into the atmosphere through a chimney, the exhaust gas temperature is generally 150-180 ℃, and the heat released when the temperature of the flue gas is reduced from high temperature to the exhaust gas temperature is used for changing water into steam. Boiler feed water firstly enters the economizer, and the water absorbs heat in the economizer, is heated to a saturation temperature slightly lower than the pressure of a steam drum and enters the boiler barrel. After the water entering the drum is mixed with saturated water in the drum, the water enters the evaporator along a downcomer below the drum to absorb heat and start to produce steam, and only part of the water is usually changed into steam, so that steam-water mixture flows in the evaporator. The steam-water mixture leaves the evaporator and enters the upper drum to be separated through steam-water separation equipment, water falls into the water space in the drum and enters the downcomer to continuously absorb heat and generate steam, and steam enters the superheater from the upper part of the drum to absorb heat so that saturated steam is changed into superheated steam. Three heating surfaces, namely an economizer, an evaporator and a superheater, are corresponding according to three stages of a steam production process, and if superheated steam is not needed, only saturated steam is needed, and the superheater can be omitted. When reheated steam exists, a reheater can be additionally arranged

Most of ferrosilicon exhaust-heat boilers in the industry at present adopt the forced circulation structure that relies on the circulating pump, and this structure not only has the circulating pump with too high costs, and the electric quantity consumption is big, but also has the later maintenance problem with high costs, the degree of difficulty is big moreover. The natural circulation silicon iron waste heat boiler can effectively solve the problems of large boiler investment in the early stage, high operation cost in the later stage and high maintenance difficulty, and achieves two purposes at one stroke.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a box body structure of a natural circulation ferrosilicon waste heat boiler, which comprises a box body, an upper collecting box, a communicating pipe, an upper collecting box, an upper sealing shell, a lower collecting box, a dust falling hopper, a pipe bundle and an inspection door, wherein the box body is vertically arranged and adopts a modular structure, the pipe bundle is arranged in the box body in sequence, the pipe bundle is welded with the upper collecting box and the lower collecting box, the upper collecting box is connected with the upper collecting box through the communicating pipe, the lower collecting box is welded with the lower collecting box, the upper collecting box is connected with an outer ascending pipe of the box body, the lower collecting box is connected with a descending pipe, the dust falling hopper is arranged at the leftmost side of the box body structure, and the inspection door is arranged at the left side of the lower end of the box and at the.

Preferably, the upper sealing case is disposed at a lower end side of the upper header.

Preferably, the ash falling hopper is of a conical structure, and a discharge hole is formed in the leftmost side of the ash falling hopper.

Preferably, a plurality of flue gas inlets are formed in the upper end of the box body structure, and a plurality of flue gas outlets are formed in the lower end of the box body structure.

Preferably, the inspection door adopts a stainless steel lining and block-added alumina silicate fiber structure.

Preferably, the top of the box body is sealed by an upper sealing shell.

Preferably, the ash falling hopper adopts a Roots blower pneumatic ash conveying system or a spiral ash conveying system according to different requirements.

Compared with the prior art, the invention has the following beneficial effects: the box body structure of the natural circulation ferrosilicon waste heat boiler adopts a box body structure, is very convenient to assemble on site, and greatly shortens the installation period; the boiler depends on natural circulation, the traditional mode of depending on a circulating pump is abandoned, the production cost and the operation cost of the boiler are greatly reduced, the operation difficulty of workers is also reduced, and the purposes of saving energy, reducing consumption and reducing cost are fully realized.

Drawings

FIG. 1 is a schematic view of the overall structure of a tank structure of a natural circulation ferrosilicon waste heat boiler according to the present invention;

in the figure: 1. a box body; 2. an upper header; 3. a communicating pipe; 4. an upper header; 5. an upper sealing shell; 6. a lower header; 7. a lower header; 8. a dust falling hopper; 9. a tube bundle; 10. the door is inspected.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Please refer to fig. 1, a box structure of a natural circulation ferrosilicon waste heat boiler, which comprises a box 1, an upper header 2, a communicating pipe 3, an upper header 4, an upper sealing shell 5, a lower header 6, a lower header 7, a dust hopper 8, a tube bundle 9 and an inspection door 10, wherein the box 1 is vertically arranged and adopts a modular structure, the tube bundle 9 is arranged in the box 1 in sequence, the tube bundle 9 is welded with the upper header 4 and the lower header 6, the upper header 4 is connected with the upper header 2 through the communicating pipe 3, the lower header 6 is welded with the lower header 7, the upper header 2 is connected with an outer ascending pipe of the box, the lower header 7 is connected with a descending pipe, the dust hopper 8 is installed on the leftmost side of the box structure, and the inspection door 10 is installed on the left side of the lower end of the box 1 and on the right side of the lower header 6.

The upper seal case 5 is provided on the lower end side of the upper header 4.

The ash falling hopper 8 is of a conical structure, and a discharge hole is formed in the leftmost side of the ash falling hopper 8.

A plurality of flue gas inlet has been seted up to the upper end of box structure, and a plurality of exhanst gas outlet has been seted up to the lower extreme of box structure.

The inspection door 10 is made of a stainless steel lining and block-added alumina silicate fiber structure.

The top of the tank is sealed with an upper sealing shell 5.

The ash falling hopper 8 adopts a Roots blower pneumatic ash conveying system or a spiral ash conveying system according to different requirements.

It should be noted that the natural circulation ferrosilicon waste heat boiler box body structure is composed of an upper collection box 2 of a box body 1, an upper collection box 4 of a communicating pipe 3, a lower collection box 6 of an upper sealing shell 5, a tube bundle 7 of a dust falling bucket 8, an inspection door 10, a box body 1 is vertically arranged and adopts a modular structure, the tube bundle 9 is arranged in the box body 1 in sequence, the tube bundle 9 is connected with the upper collection box 4 and the lower collection box 6 in a welding way, the upper collection box 4 is connected with the upper collection box 2 through the communicating pipe 3, the lower collection box 6 is connected with the lower collection box 7 in a welding way, the upper collection box 2 is connected with an ascending pipe outside the box body, the lower collection box 7 is connected with a descending pipe to realize the natural circulation of the boiler, the inspection door 10 adopts a stainless steel lining and a block-made alumina silicate fiber structure, the heat insulation is reliable, the maintenance is convenient, the top of the box body is sealed by the upper sealing shell 5, in, according to different requirements of customers, a Roots blower pneumatic ash conveying system or a spiral ash conveying system can be adopted.

When the device works, waste heat smoke enters the box body from the front side of the box body, the tube bundle 9 is transversely washed, water in the tube is heated to be changed into a steam-water mixture, and a natural pressure head is generated with the water in the external downcomer to form natural circulation; the box type structure is adopted, the field assembly is very convenient, and the installation period is greatly shortened; the boiler depends on natural circulation, the traditional mode of depending on a circulating pump is abandoned, the production cost and the operation cost of the boiler are greatly reduced, the operation difficulty of workers is also reduced, and the purposes of saving energy, reducing consumption and reducing cost are fully realized.

It is noted that, herein, relational terms such as first and second, and the like may be 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. Natural circulation ferrosilicon exhaust-heat boiler box structure, this box structure comprises box (1), upper portion collection case (2), communicating pipe (3), upper header (4), upper portion sealed shell (5), lower collection case (6), lower part collection case (7), ash falling bucket (8), tube bank (9) and inspection door (10), its characterized in that: the utility model discloses a box, including box (1), pipe bundle (9), lower header (7), lower part collection case (7) and lower header (6), box (1) is vertical arranges, adopts modular structure, pipe bundle (9) are arranged in the same row in box (1), and pipe bundle (9) and last collection case (4) and lower collection case (6) welded connection, go up collection case (4) and upper portion collection case (2) and are connected through communicating pipe (3), lower collection case (6) and lower part collection case (7) welded connection, upper portion collection case (2) and box outer tedge are connected, and lower part collection case (7) are connected with the downtake, and ash falling bucket (8) are installed to the leftmost side of this box structure, inspection door (10) are installed on the lower extreme left side of box (1) and.

2. The box structure of the natural circulation ferrosilicon waste heat boiler of claim 1, characterized in that: the upper sealing shell (5) is arranged on one side of the lower end of the upper header (4).

3. The box structure of the natural circulation ferrosilicon waste heat boiler of claim 1, characterized in that: the ash falling hopper (8) is of a conical structure, and a discharge hole is formed in the leftmost side of the ash falling hopper (8).

4. The box structure of the natural circulation ferrosilicon waste heat boiler of claim 1, characterized in that: a plurality of smoke inlet is opened to the upper end of box structure, and a plurality of exhanst gas outlet is opened to the lower extreme of box structure.

5. The box structure of the natural circulation ferrosilicon waste heat boiler of claim 1, characterized in that: the inspection door (10) adopts a stainless steel lining and block-added aluminum silicate fiber structure.

6. The box structure of the natural circulation ferrosilicon waste heat boiler of claim 1, characterized in that: the top of the box body is sealed by an upper sealing shell (5).

7. The box structure of the natural circulation ferrosilicon waste heat boiler of claim 1, characterized in that: the ash falling hopper (8) adopts a Roots blower pneumatic ash conveying system or a spiral ash conveying system according to different requirements.