CN218033092U - Modular assembly type gas-steam boiler - Google Patents
Modular assembly type gas-steam boiler Download PDFInfo
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- CN218033092U CN218033092U CN202221819954.1U CN202221819954U CN218033092U CN 218033092 U CN218033092 U CN 218033092U CN 202221819954 U CN202221819954 U CN 202221819954U CN 218033092 U CN218033092 U CN 218033092U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model discloses a modular assembly formula gas steam boiler, including arranging the furnace system of connection in order, convection system and economizer system, the furnace system, be equipped with the water flow path in convection system and the economizer system respectively, smoke flow path and steam flow path, the convection system links to each other with the economizer system through the body feed pipe and forms the water route and communicates with each other, the outside and the flue gas circulation side of economizer system are equipped with the flue gas side guard plate, the convection system is connected with the turn flue, be equipped with the import flue and the export flue of economizer system on the flue gas side guard plate, the flue gas flow path is including the flue between turn flue and the flue gas side guard plate. The utility model discloses, compact structure, on-the-spot simple to operate, material environmental protection, the burning is even, and the thermal efficiency is high, can make flame the filling degree best in furnace, stops enough long combustion time in order to guarantee that fuel burns out to obtain the best combustion state of ultralow NOx emission numerical value.
Description
Technical Field
The utility model relates to a gas steam boiler, concretely relates to modular assembly formula gas steam boiler.
Background
Blue sky engineering is advocated in various large cities in China in recent decades, large gas-fired steam boilers are used as heat sources for production steam and power plants in the initial starting period in large-scale use, particularly, the increasing low-nitrogen environmental protection treatment strength of the countries in recent years is high, and the gas-fired boilers are generally required to reduce NOx to 30mg/Nm 3 In the following, the integral gas boiler designed in the early stage has the characteristics of prominent overall transportation, compact structure and small occupied area, the smaller hearth size cannot meet the requirement of low-nitrogen combustion, and the bulk boiler cannot meet the difficulties of tight field installation period of a user, so that an energy-saving and environment-friendly new product with large hearth size, suitable integral furnace body size for road transportation, low steel consumption, high efficiency, stable and reliable performance needs to be innovated and developed to replace the original furnace type product.
The traditional integral gas boiler is generally divided into two furnace body parts, namely a boiler body and a coal economizer.The size of the hearth is small, and the NOx of tail flue gas can not be reduced to 30mg/Nm 3 In the bulk boiler, the field installation period is long, the equipment quality cannot be completely guaranteed, and the one-time investment cost of the equipment is high.
In summary, there is a need for a new modular assembly type gas steam boiler with high efficiency and environmental protection.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the prior art lacks big furnace and the low-nitrogen is high-efficient, the energy-conserving medium and large-scale assembled gas steam boiler's of environmental protection problem.
In order to solve the technical problem, the utility model provides a modular assembly formula gas steam boiler which adopts provides a furnace system, convection system and the economizer system of connection including arranging in order, the front end of furnace system is provided with the combustor, convection system's top is equipped with the steam pocket, be equipped with rivers route, smoke flow route and steam flow route in furnace system, convection system and the economizer system respectively, the economizer system is external to have the system feed pipe, be connected with the body feed pipe between economizer system and the last steam pocket, convection system passes through the body feed pipe links to each other with the economizer system and forms the waterway and communicates with each other, the outside and the smoke flow side of economizer system are equipped with flue gas side protection board, convection system is connected with the turn flue, be equipped with on the flue gas side protection board the import flue and the export flue of economizer system, the smoke flow route includes the flue with flue between the flue gas side protection board.
In the above scheme, the inside of the furnace system comprises: the device comprises a first upper longitudinal collecting box and a first lower longitudinal collecting box which are arranged along the longitudinal direction of a hearth, first side wall membrane walls which are respectively arranged on the left side and the right side of the hearth system, a first front collecting box and a first rear collecting box which are respectively arranged on the front side and the rear side of the hearth system, and first front and rear wall membrane walls which are respectively arranged on the front side and the rear side of the hearth system.
In the above solution, the convection system includes: the convection system comprises a second upper collecting box and a second lower collecting box which are arranged along the longitudinal direction of the convection system, second side wall membrane walls which are respectively arranged at the left side and the right side of the convection system, convection tube bundles which are arranged along the longitudinal direction of the convection system, and second front and rear wall membrane walls which are respectively arranged at the front side and the rear side of the convection system.
In the above aspect, the economizer system includes: the high-frequency fin heat exchange tubes are arranged between the water outlet header and the water inlet header.
In the scheme, the left outer wall of the hearth system is provided with the observation hole, and the top of the left outer wall in the hearth system is provided with the explosion door.
In the above scheme, the cross section of the furnace system is a regular hexagon, and the furnace system and the convection system both adopt full-screen membrane walls.
In the above scheme, the economizer system comprises two sets of economizers arranged in series.
In the above scheme, the convection bank is arranged in the middle area of the convection system, and the convection bank is vertically arranged.
In the above scheme, the shape of the hearth system is a cuboid, and the exterior of the hearth system is composed of a section steel frame and a first outer guard plate.
In the above scheme, the convection system is cuboid in shape, and the outside of the convection system is composed of a section steel frame and a second outer protection plate.
The utility model discloses, compact structure, on-the-spot simple to operate, material environmental protection, the burning is even, and the thermal efficiency is high, can make flame full of filling degree best in furnace, stops enough long combustion time in order to guarantee that fuel burns out to obtain the best combustion state of ultralow NOx emission numerical value.
Drawings
FIG. 1 is a schematic front view of the appearance structure of the present invention;
fig. 2 is a left side view schematically illustrating the external structure of the present invention;
fig. 3 is a schematic top view of the external structure of the present invention;
fig. 4 is a schematic top view of the internal structure of the convection system of the present invention;
fig. 5 is a schematic side view of the internal structure of the furnace system of the present invention;
fig. 6 is a schematic side view of the internal structure of the convection system of the present invention;
fig. 7 is a schematic side view of the internal structure of the economizer system of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The utility model discloses a modularization assembled gas steam boiler, this paper content can be used for reference to technical staff in the field, and proper improvement technological parameter realizes. It is expressly noted that all such similar substitutes and modifications apparent to those skilled in the art are deemed to be included in the invention and it is apparent to those skilled in the art that the inventive technique can be practiced and applied by modifying or appropriately combining the teachings herein without departing from the spirit and scope of the invention.
In utility model, unless otherwise specified, scientific and technical terms used herein have the meaning commonly understood by a person skilled in the art.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
It should be noted that, in the description of the present invention, the terms "first" and "second" are only used for convenience in describing different components, and are not to be construed as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
As shown in fig. 1 to 7, the utility model provides a modular assembly type gas-steam boiler, the inside of furnace system 1 includes: the first upper longitudinal collection box 1-1 and the first lower longitudinal collection box 1-2 which are arranged in a through-length mode along the front-back direction of the hearth, first side wall membrane type walls 1-5 which are respectively arranged on the left side and the right side of the hearth system 1, first front collection boxes 1-3 and first rear collection boxes 1-4 which are respectively arranged on the front side and the back side of the hearth system 1, and first front and back wall membrane type walls 1-6 which are respectively arranged on the front side and the back side of the hearth system 1, wherein the first upper longitudinal collection box 1-1, the first lower longitudinal collection box 1-2, the first side wall membrane type walls 1-5 and the first front and back wall membrane type walls 1-6 are mutually enclosed to form a closed flue gas space of the hearth system 1, the first upper longitudinal collection box 1-1, the first lower longitudinal collection box 1-2, the first front collection box 1-3, the first back collection box 1-4, the first side wall membrane type walls 1-5 and the inner sides of the first front and back wall membrane type walls 1-6 form a first circulating water path, the appearance of the hearth system 1-2 is a steel frame, and the appearance of the hearth system 1-8 is a cuboid, and the outer steel frame;
the first side wall membrane type wall 1-5 is respectively connected with a first upper longitudinal collecting box 1-1 and a first lower longitudinal collecting box 1-2, the first front collecting box 1-3 is respectively connected with a first upper longitudinal collecting box 1-1 and a first lower longitudinal collecting box 1-2, the first rear collecting box 1-4 is respectively connected with a first upper longitudinal collecting box 1-1 and a first lower longitudinal collecting box 1-2, and the first front and rear wall membrane type wall 1-6 is connected between the first front collecting box 1-3 and the first rear collecting box 1-4;
an outlet flue of the hearth system 1 is arranged at the tail part of a first side wall membrane type wall 1-5 on the right side, the hearth system 1 is connected with an upper steam pocket 2-1 through an air duct 6 to form a steam path communication, the hearth system 1 is connected with a second communicating pipe 2-7 in the convection system 2 through a first communicating pipe 1-7 to form a water path communication, the first communicating pipe 1-7 is connected with a first lower longitudinal header 1-2, and the second communicating pipe 2-7 is connected with a second lower header 2-3.
A fire observation hole is formed in the left outer wall of the hearth system 1, explosion-proof doors 1-9 and temperature and pressure measuring point devices are arranged at the top of the left outer wall in the hearth system 1, measuring and controlling instruments for measuring and controlling actual operation parameters of a hearth during boiler operation can be conveniently installed, the hearth system 1 and the convection system 2 both adopt full-screen membrane type walls, and the cross section of the hearth is hexagonal and circular.
The interior of the convection system 2 includes: the convection system comprises a second upper header 2-2 and a second lower header 2-3 which are arranged in a through-length manner along the front-back direction of the convection system 2, second side wall membrane type walls 2-4 which are respectively arranged at the left side and the right side of the convection system 2, convection tube bundles 2-5 which are arranged in a through-length manner along the front-back direction of the convection system 2, and second front-back wall membrane type walls 2-8 which are respectively arranged at the front side and the back side of the convection system 2, wherein a smoke inlet of the convection system 2 is arranged at the back side of the convection tube bundles 2-5, a smoke inlet of the convection system 2 is arranged at the left side of the second side wall membrane type walls 2-4, the second upper header 2-2, the second lower header 2-3, the second side wall membrane type walls 2-4 and the second front-back wall membrane type walls 2-8 mutually surround a closed smoke space forming a convection area of the convection system 2, the convection system 2 is in a cuboid shape, and a section steel frame and a second outer protection plate 2-10 are arranged outside the convection system;
a superheater component 2-6 is arranged at a smoke inlet of the convection system 2, an upper steam drum 2-1 is connected with the superheater component 2-6 to exchange heat of generated saturated steam into superheated steam, and the superheater component 2-6 is connected to an outer pipe network;
a third communicating pipe 2-9 is arranged along the front-back direction of the convection system 2 in a through manner, and the upper steam drum 2-1 is connected with a second upper header 2-2 through the third communicating pipe 2-9;
a second side wall membrane type wall 2-4 is respectively connected with a second upper collecting box 2-2 and a second lower collecting box 2-3, a second front and rear wall membrane type wall 2-8 is respectively connected with the second upper collecting box 2-2 and the second lower collecting box 2-3, a convection bank 2-5 is connected between the second upper collecting box 2-2 and the second lower collecting box 2-3, and a second circulating water path is formed by the inner sides of the pipe walls of the upper steam pocket 2-1, the second upper collecting box 2-2, the second lower collecting box 2-3, the second side wall membrane type wall 2-4, the second front and rear wall membrane type wall 2-8 and the third communicating pipe 2-9;
a smoke inlet of the convection system 2 is arranged on the left side of the second side wall membrane wall 2-4, the smoke inlet of the convection system 2 is connected with an outlet flue of the hearth system 1, and a smoke outlet of the convection system 2 is arranged at the front end of the right side of the second side wall membrane wall 2-4 and is connected with a turning flue 8; the convection bank 2-5 is vertically arranged, and the convection bank 2-5 is uniformly distributed in the middle area of the closed flue gas space of the convection area.
The economizer system 3 includes: the system comprises a water outlet header 3-1 and a water inlet header 3-2 which are respectively arranged at the upper end and the lower end of an economizer system 3, and high-frequency fin heat exchange tubes 3-3 which are arranged in the front-back direction of the economizer system 3 in a through-length mode, wherein the high-frequency fin heat exchange tubes 3-3 are arranged between the water outlet header 3-1 and the water inlet header 3-2;
the economizer system 3 is externally connected with a system water feed pipe 10, a body water feed pipe 5 is connected between the economizer system 3 and the upper steam pocket 2-1, and the convection system 2 is connected with the economizer system 3 through the body water feed pipe 5 to form a waterway communication;
the outer side of the economizer system 3 and the flue gas flowing side are provided with flue gas side protection plates 3-4 to form an inlet flue and an outlet flue of the economizer system 3, a turning flue 8 of the convection system 2 and the flue between the flue gas side protection plates 3-4 of the economizer system 3 form a flue gas flow of the whole boiler, water circulation and flue gas countercurrent heat exchange are carried out, the heat exchange effect is good, and two groups of economizers are arranged in series.
The utility model discloses, mutual independence between each system, soda system pass through pipeline interconnect, and flue gas system then utilizes the intercommunication flue to connect. The welding workload is less when the boiler is installed and assembled on site, and the installation is convenient.
Preferably, the smoke stroke in the convection system is a single stroke, the smoke and wind resistance is small, the power of the air blower is reduced, the high-frequency finned tube between the water inlet and outlet header and the smoke flow perform countercurrent heat exchange, the heat exchange effect is enhanced, and the whole floor area of the equipment is reduced.
Preferably, the burner is positioned at the front end of the system, the flame combusted after the natural gas and the air are mixed burns in the space, the cross section of the hearth is hexagonal-like circular, each inch of space designed by the circular-like hearth is fully utilized, and the flame obtains the optimal fullness state in the hearth, so that the ultralow NOx burner can better exert the ultralow NOx combustion performance. And the high-temperature flue gas flows to the convection system through an outlet flue at the tail part of the right-side wall membrane wall.
Preferably, the left and right side membrane walls are of a whole screen structure without intermediate partition walls, so that the heat exchange effect of the boiler is improved, and the use of masonry materials is reduced. The high-temperature flue gas enters the convection system through the inlet flue and then enters the turning flue after rushing forwards from the back to the flue outlet.
The utility model discloses, whole water flow does: the system water supply pipe 10 → the economizer system 3 → the body water supply pipe 5 → the upper steam pocket 2-1 → the third communicating pipe 2-9 → the convection system 2 → the second communicating pipe 2-7 → the first communicating pipe 1-7 → the furnace system 1, saturated steam is generated and then enters the superheated steam pipe through the steam guide pipe 6 → the upper steam pocket 2-1 → the superheater assembly 2-6 to be heated, and superheated steam is generated and sent to the outer pipe network.
The utility model discloses, whole flue gas flow does: the natural gas enters the middle area of the furnace system 1 through the front burner 4 in the furnace system 1, and is mixed with air and combusted to generate high-temperature flue gas → the outlet flue of the furnace system 1 → the smoke inlet of the convection system 2 → the superheater component 2-6 → the convection tube bundle 2-5, and after heat exchange, the high-temperature flue gas passes through the smoke outlet of the convection system 2 → the turning flue 8 → the economizer system 3 → the flue outlet of the economizer system 3.
The economizer adopts acid corrosion resistant steel pipes to adapt to weak carbonic acid corrosion of condensed water of which the tail heating surface PH =6, so that the overall service life of the economizer is greatly prolonged. Meanwhile, non-stressed parts such as the economizer box body and the flue which are in direct contact with the flue gas condensate water are also made of acid corrosion resistant steel plates, so that the overall service life of the economizer is prolonged.
The utility model has the advantages that:
1. the boiler can generate nitrogen oxide in flue gas with the concentration less than 30mg/Nm 3 The design of environmental protection emission standard, 1 ultra-low NOx combustor 4 is installed in the 1 front end of furnace system module, under the condition that satisfies flame length and diameter, bigger furnace, the flame temperature is lower, and NOx production is directly proportional with flame temperature, and can rise sharply when exceeding 1100 ℃, but increase furnace must exert an influence to boiler overall dimension, whole transportability, consequently, design furnace structural dimension must combine together with ultra-low nitrogen combustor and furnace body structure, general low nitrogen requires that the volume heat load of self-contained furnace is less than 700kw/m 3 Actually, the heat load of the furnace volume of the utility model is controlled between 600 and 670kw/m through reasonable design 3 In the meantime.
2. The boiler furnace has the characteristic that the cross section of the boiler furnace is hexagonal and similar to a circle, the single combustor is horizontally arranged at the center of the front wall, the uniform distance between flame in the furnace and a water-cooled wall is ensured, the filling degree of the flame in the furnace is optimal under the condition that the size of the furnace meets the diameter and the length of the flame, the flame stays for enough time to ensure the fuel to be burnt out, and the optimal combustion state with ultralow NOx emission value is obtained.
3. The boiler adopts a three-body modular form, is assembled on site, greatly reduces the hoisting weight of single equipment, meets the requirement of equipment transportation boundary, and is simple and convenient to install on site.
4. The boiler adopts the full-film water-cooled wall technology, all the outer wall pipes are completely film-walled, and the thermal stability and the heat-insulating sealing property of the boiler body are greatly improved; meanwhile, the design of no fire-resistant furnace wall not only greatly reduces the weight of the furnace body, but also indirectly improves the energy-saving and environment-friendly level of the product without using the fire-resistant material which is produced with high pollution and high energy consumption.
5. The two groups of coal economizers arranged in series on the right side of the boiler reduce the high-temperature flue gas with the temperature of 400-500 ℃ in the convection bank to about 60 ℃, the boiler feed water is heated to about 40 ℃, the thermal efficiency reaches 97 percent, and the corrosion of the tubes and fins of the coal economizers can be effectively prevented.
The utility model discloses, compact structure, on-the-spot simple to operate, material environmental protection, the burning is even, and the thermal efficiency is high, can make flame the filling degree best in furnace, stops enough long combustion time in order to guarantee that fuel burns out to obtain the best combustion state of ultralow NOx emission numerical value.
The present invention is not limited to the above best mode, and any person should learn the structural changes made under the teaching of the present invention, all with the present invention has the same or similar technical solution, all fall into the protection scope of the present invention.
Claims (10)
1. The utility model provides a modularization assembled gas steam boiler, its characterized in that, is including arranging furnace system, convection current system and the economizer system of connection in order, furnace system's front end is provided with the combustor, convection current system's top is equipped with the steam pocket, be equipped with water flow path, smoke flow path and steam flow path in furnace system, convection current system and the economizer system respectively, the economizer system is external to have the system water-feeding pipe, be connected with the body water-feeding pipe between economizer system and the steam pocket, the convection current system passes through the body water-feeding pipe links to each other with the economizer system and forms the water route and communicates with each other, the outside and the smoke gas circulation side of economizer system are equipped with flue gas side guard plate, the convection current system is connected with the turn flue, be equipped with on the flue gas side guard plate the import flue and the export flue of economizer system, the smoke flow path include the turn flue with flue between the flue gas side guard plate.
2. A modular assembled gas and steam boiler as claimed in claim 1, wherein the interior of the furnace system comprises: the device comprises a first upper longitudinal collecting box and a first lower longitudinal collecting box which are arranged along the longitudinal direction of a hearth, first side wall membrane walls which are respectively arranged at the left side and the right side of the hearth system, a first front collecting box and a first rear collecting box which are respectively arranged at the front side and the rear side of the hearth system, and first front wall membrane walls which are respectively arranged at the front side and the rear side of the hearth system.
3. A modular assembled gas-to-steam boiler as claimed in claim 1, wherein the interior of the convection system comprises: the convection system comprises a second upper collecting box and a second lower collecting box which are arranged along the longitudinal direction of the convection system, second side wall membrane walls which are respectively arranged at the left side and the right side of the convection system, convection tube bundles which are arranged along the longitudinal direction of the convection system, and second front and rear wall membrane walls which are respectively arranged at the front side and the rear side of the convection system.
4. A modular assembled gas-to-steam boiler as claimed in claim 1, wherein the economizer system comprises: the high-frequency finned heat exchange tube is arranged between the water outlet header and the water inlet header.
5. A modular assembly gas and steam boiler according to claim 1, wherein the left outer wall of the furnace system is provided with a viewing hole, and the top of the left outer wall of the furnace system is provided with an explosion-proof door.
6. A modular assembled gas and steam boiler according to claim 1, wherein the cross-section of the furnace system is regular hexagon-like, and the furnace system and the convection system are all full-film walls.
7. A modular assembled gas-to-steam boiler as claimed in claim 1, wherein the economizer system comprises two sets of economizers arranged in series.
8. A modular assembled gas and steam boiler as claimed in claim 3, wherein the convection bank is disposed in a middle region of the convection system and the convection bank is disposed vertically.
9. A modular assembly gas and steam boiler according to claim 1, wherein the furnace system is rectangular and is externally composed of a steel frame and a first outer protective plate.
10. A modular assembly gas and steam boiler according to claim 1, wherein the convection system is rectangular in shape and is externally composed of a steel frame and a second outer protective plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221819954.1U CN218033092U (en) | 2022-07-14 | 2022-07-14 | Modular assembly type gas-steam boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221819954.1U CN218033092U (en) | 2022-07-14 | 2022-07-14 | Modular assembly type gas-steam boiler |
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| Publication Number | Publication Date |
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| CN218033092U true CN218033092U (en) | 2022-12-13 |
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| CN202221819954.1U Active CN218033092U (en) | 2022-07-14 | 2022-07-14 | Modular assembly type gas-steam boiler |
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| CN (1) | CN218033092U (en) |
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2022
- 2022-07-14 CN CN202221819954.1U patent/CN218033092U/en active Active
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