CN212377956U - Natural circulation ferrosilicon exhaust-heat boiler circulation system - Google Patents
Natural circulation ferrosilicon exhaust-heat boiler circulation system Download PDFInfo
- Publication number
- CN212377956U CN212377956U CN202021191904.4U CN202021191904U CN212377956U CN 212377956 U CN212377956 U CN 212377956U CN 202021191904 U CN202021191904 U CN 202021191904U CN 212377956 U CN212377956 U CN 212377956U
- Authority
- CN
- China
- Prior art keywords
- circulation
- boiler
- heating surface
- header
- heat boiler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The utility model discloses a natural circulation ferrosilicon exhaust-heat boiler circulation system, this exhaust-heat boiler circulation system includes a drum, downcomer, heating surface tube bank and tedge, and exhaust-heat boiler circulation system has two kinds of circulation modes, and one mode is forced circulation mode, and another kind is natural circulation mode, and the boiler water in the forced circulation mode is by after the drum is squeezed into the import collection box through forced circulation pump through the downcomer, equally divide to the heating surface tube bank and become vapour or steam-water mixture after the heat transfer of high temperature flue gas, get into the export collection box, at last through the tedge, get back to in the drum; the circulating system of the natural circulation silicon iron waste heat boiler adopts a natural circulation structure, the steam resistance phenomenon on the heating surface is avoided, heat exchange can be better carried out, and the water circulation is more reliable; a forced circulation pump is removed, so that the power load of a user unit is greatly reduced; meanwhile, a low-point pollution discharge structure is adopted, and accumulated water of the boiler is thoroughly discharged.
Description
Technical Field
The utility model relates to a waste heat boiler field specifically is natural circulation ferrosilicon waste heat boiler circulation system.
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
At present, silicon iron waste heat boilers are of forced circulation structures, the structures need to be internally circulated through a forced circulation pump, the power consumption in the boilers is large, and the problems that a heating surface pipe and a header water storage tank cannot be discharged cleanly exist. This scheme adopts natural circulation structure, need not increase the force-feed circulation pump, and the low point has the blowdown header, can arrange the water of receiving the hot side and header to the greatest extent. The difficult problem is thoroughly solved.
SUMMERY OF THE UTILITY MODEL
To prior art's not enough, the utility model provides a natural circulation ferrosilicon exhaust-heat boiler circulation system, this exhaust-heat boiler circulation system include boiler barrel, downcomer, heating surface tube bank and tedge, and exhaust-heat boiler circulation system has two kinds of circulation modes, and a mode is forced circulation mode, and another kind is the natural circulation mode.
Preferably, the boiler water in the forced circulation mode is pumped into the inlet header through the downcomer by the forced circulation pump, then is evenly distributed to the heating surface tube bundle, is subjected to heat exchange by high-temperature flue gas, is changed into steam or a steam-water mixture, enters the outlet header, and finally returns to the boiler barrel through the riser.
Preferably, the heating surface tube bundle in the forced circulation mode is of a coil structure, and has both an ascending tube and a descending tube, and an elbow.
Preferably, the inlet header and the outlet header are arranged at the upper end, and accumulated water in the heating surface tube bundle cannot be drained completely.
Preferably, the furnace water in the natural circulation mode enters the first header through a downcomer from the boiler barrel, is equally divided to the heating surface tube bundle through the second header, is subjected to heat exchange by high-temperature flue gas, is changed into steam or a steam-water mixture, passes through the third header, is introduced into the fourth header, passes through an ascending pipe, and returns to the boiler barrel.
Preferably, the heating surface tube bundle in the natural circulation mode is of a straight tube structure and is a riser, so that the steam resistance phenomenon does not exist.
Preferably, the first header is a low point, and accumulated water in the heating surface tube bundle can be completely drained.
Compared with the prior art, the utility model discloses possess following beneficial effect: the circulating system of the natural circulation silicon iron waste heat boiler adopts a natural circulation structure, the steam resistance phenomenon on the heating surface is avoided, heat exchange can be better carried out, and the water circulation is more reliable; a forced circulation pump is removed, so that the power load of a user unit is greatly reduced; meanwhile, a low-point pollution discharge structure is adopted, and accumulated water of the boiler is thoroughly discharged.
Drawings
FIG. 1 is a schematic diagram of a forced circulation of a circulating system of a natural circulation ferrosilicon waste heat boiler of the present invention;
FIG. 2 is a schematic view of the natural circulation of the circulating system of the naturally circulating ferrosilicon waste heat boiler of the present invention;
in the figure: 1. a drum; 2. a down pipe; 3. a forced circulation pump; 4. a heated surface tube bundle; 5. an inlet header; 6. an outlet header; 7. a riser pipe; 8. a first header; 9. a second header; 10. a third header; 11. and (4) collecting the header.
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.
Referring to fig. 1-2, the circulating system of a natural circulation silicon iron waste heat boiler comprises a boiler barrel 1, a downcomer 2, a heating surface tube bundle 4 and an upcomer 7, and the circulating system of the waste heat boiler has two circulation modes, one is a forced circulation mode, and the other is a natural circulation mode.
The boiler water in the forced circulation mode is pumped into an inlet header 5 from the boiler barrel 1 through a downcomer 2 and a forced circulation pump 3, then is evenly distributed to a heating surface tube bundle 4, is subjected to heat exchange through high-temperature flue gas, is changed into steam or a steam-water mixture, enters an outlet header 6, and finally returns to the boiler barrel 1 through an ascending pipe 7.
The heating surface tube bundle 4 in the forced circulation mode is of a coiled tube structure and is provided with an ascending tube and a descending tube, and an elbow.
The inlet header 5 and the outlet header 6 are arranged at the upper end, and accumulated water in the heating surface tube bundle 4 cannot be drained completely.
The boiler water in the natural circulation mode enters a first header 8 from the boiler barrel 1 through a down pipe 2, is evenly distributed to a heating surface tube bundle 4 through a second header 9, is changed into steam or a steam-water mixture after heat exchange of high-temperature flue gas, passes through a third header 10, is introduced into a fourth header 11, then passes through a rising pipe 7 and returns to the boiler barrel 1.
The heating surface tube bundle 4 in the natural circulation mode is of a straight tube structure and is an ascending tube, and the steam resistance phenomenon does not exist.
The first header 8 is a low point and can completely drain accumulated water in the heating surface tube bundle 4.
The forced circulation system includes: furnace water is pumped into an inlet header 5 from a boiler barrel 1 through a downcomer 2 and a forced circulation pump 3, then is evenly distributed to a heating surface tube bundle 4, is changed into steam or a steam-water mixture after heat exchange of high-temperature flue gas, enters an outlet header 6, and finally returns to the boiler barrel 1 through an ascending pipe 7;
the heating surface tube bundle 4 of the system is of a serpentine tube structure, and is provided with an ascending tube and a descending tube, and an elbow, so that the steam resistance is large, and the steam resistance is easy to form at the elbow; the header is arranged at the upper end, and accumulated water in the heating surface tube bundle 4 cannot be drained completely;
the natural circulation system comprises: furnace water enters a first header 8 (capable of discharging pollution at a low point) from the boiler barrel 1 through a downcomer 2, is evenly distributed to a heating surface tube bundle 4 through a second header 9, is changed into steam or a steam-water mixture after heat exchange of high-temperature flue gas, is introduced into a fourth header 11 through a third header 10, and then returns to the boiler barrel 1 through an upcomer 7;
the heating surface tube bundle 4 of the system is of a straight tube structure and is an ascending tube, so that the steam resistance phenomenon does not exist, and the water circulation is reliable; the first header 8 is a low point, so that accumulated water in the heating surface tube bundle 4 can be completely drained;
a natural circulation structure is adopted, the steam resistance phenomenon on the heating surface is avoided, heat exchange can be better carried out, and water circulation is more reliable; a forced circulation pump is removed, so that the power load of a user unit is greatly reduced; meanwhile, a low-point pollution discharge structure is adopted, and accumulated water of the boiler is thoroughly discharged.
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 (7)
1. Natural circulation ferrosilicon exhaust-heat boiler circulation system, this exhaust-heat boiler circulation system include boiler barrel (1), downcomer (2), heating surface tube bank (4) and tedge (7), its characterized in that: the waste heat boiler circulation system has two circulation modes, wherein one mode is a forced circulation mode, and the other mode is a natural circulation mode.
2. The circulating system of a natural circulation silicon iron waste heat boiler according to claim 1, characterized in that: the boiler water in the forced circulation mode is pumped into an inlet header (5) from the boiler barrel (1) through a downcomer (2) and a forced circulation pump (3), then is uniformly distributed to a heating surface tube bundle (4), is subjected to heat exchange by high-temperature flue gas, is changed into steam or a steam-water mixture, enters an outlet header (6), and finally returns into the boiler barrel (1) through an ascending pipe (7).
3. The circulating system of a natural circulation silicon iron waste heat boiler according to claim 2, characterized in that: the heating surface tube bundle (4) in the forced circulation mode is of a coiled tube structure and is provided with an ascending tube, a descending tube and an elbow.
4. The circulating system of a natural circulation silicon iron waste heat boiler according to claim 2, characterized in that: the inlet header (5) and the outlet header (6) are arranged at the upper end, and accumulated water in the heating surface tube bundle (4) cannot be drained.
5. The circulating system of a natural circulation silicon iron waste heat boiler according to claim 1, characterized in that: the boiler water in the natural circulation mode enters a first header (8) from a boiler barrel (1) through a downcomer (2), is uniformly distributed to a heating surface tube bundle (4) through a second header (9) and is subjected to heat exchange by high-temperature flue gas to become steam or a steam-water mixture, and is introduced into a fourth header (11) through a third header (10), then passes through an ascension pipe (7) and returns to the boiler barrel (1).
6. The circulating system of the natural circulation ferrosilicon waste heat boiler of claim 5, characterized in that: the heating surface tube bundle (4) in the natural circulation mode is of a straight tube structure and is an ascending tube, and the steam resistance phenomenon does not exist.
7. The circulating system of the natural circulation ferrosilicon waste heat boiler of claim 5, characterized in that: the first header (8) is a low point and can completely drain accumulated water in the heating surface tube bundle (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021191904.4U CN212377956U (en) | 2020-06-23 | 2020-06-23 | Natural circulation ferrosilicon exhaust-heat boiler circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021191904.4U CN212377956U (en) | 2020-06-23 | 2020-06-23 | Natural circulation ferrosilicon exhaust-heat boiler circulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212377956U true CN212377956U (en) | 2021-01-19 |
Family
ID=74163095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021191904.4U Active CN212377956U (en) | 2020-06-23 | 2020-06-23 | Natural circulation ferrosilicon exhaust-heat boiler circulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212377956U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623337A (en) * | 2020-06-23 | 2020-09-04 | 江苏太湖锅炉股份有限公司 | Natural circulation ferrosilicon exhaust-heat boiler circulation system |
-
2020
- 2020-06-23 CN CN202021191904.4U patent/CN212377956U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623337A (en) * | 2020-06-23 | 2020-09-04 | 江苏太湖锅炉股份有限公司 | Natural circulation ferrosilicon exhaust-heat boiler circulation system |
| WO2021258646A1 (en) * | 2020-06-23 | 2021-12-30 | 江苏太湖锅炉股份有限公司 | Natural circulation ferrosilicon waste heat boiler circulation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021258646A1 (en) | Natural circulation ferrosilicon waste heat boiler circulation system | |
| CN206496353U (en) | A kind of steam air pre-heating system of garbage burning boiler | |
| CN108775573A (en) | A kind of novel electricity generation boiler of burning away the refuse | |
| CN209569040U (en) | A kind of dry coke quenching thermal electric generator again | |
| CN106288830A (en) | A kind of smelting furnace waste heat boiler | |
| CN110206605A (en) | A kind of dry coke quenching heat generating system again | |
| CN111649314A (en) | Box structure of natural circulation ferrosilicon waste heat boiler | |
| CN212377956U (en) | Natural circulation ferrosilicon exhaust-heat boiler circulation system | |
| CN207514899U (en) | A kind of super-pressure reheat vapor cycle fluidized-bed combustion boiler of burning-used biologic mass fuel | |
| CN104089268B (en) | A kind of power type heat pipe waste heat boiler device | |
| US4398501A (en) | System for recovering latent and sensible heat of effluent gases from a melting installation | |
| CN101358259B (en) | Device for waste heat recovery from smelting reduction ironmaking in heat pipe type rotary hearth furnace and steam production | |
| CN107883364A (en) | Fixed high thermal efficiency direct-flow gas injection boiler | |
| CN210197273U (en) | Household garbage incineration waste heat boiler steam reheating system adopting main steam for heating | |
| CN104089267B (en) | A kind of power type heat pipe-type exhaust heat recovering method | |
| CN207907205U (en) | A kind of large size combined cycle unit waste heat boiler | |
| CN212377955U (en) | Box structure of natural circulation ferrosilicon waste heat boiler | |
| CN203443378U (en) | Improved lime kiln waste gas residual heat power generation system with byproduct gas afterburning | |
| CN215951481U (en) | Low-temperature heat exchange island of blast furnace gas boiler | |
| CN205679075U (en) | A kind of rotary hearth furnace flue gas waste heat recovery system | |
| CN208670988U (en) | A kind of novel electricity generation boiler of burning away the refuse | |
| CN112393213A (en) | Waste heat boiler matched with vertical clean heat recovery coke oven | |
| CN215411941U (en) | Boiler tail gas waste heat power generation device capable of improving ton clinker | |
| CN203036625U (en) | Coal-fired unit steam thermal system | |
| CN211600641U (en) | Quenching boiler with superheater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |