Micro-pressure low-temperature superheated steam boiler

Abstract

The utility model discloses a micro-pressure low-temperature superheated steam boiler which comprises a horizontally-arranged shell, a boiler water inlet is formed in the lower side of the shell, a boiler furnace is arranged on the lower right portion in the shell, the front end of the boiler furnace is connected with a combustor arranged outside the shell, a smoke tube bundle is arranged on the upper left side of the boiler furnace, and the rear ends of the boiler furnace and the smoke tube bundle are connected with a reversal chamber. The front end of the smoke tube bundle is connected with a smoke box arranged outside the front end of the shell, a smoke outlet in the top of the smoke box is connected with a superheater, a smoke outlet in the top of the superheater is connected with a normal-pressure condenser, and a smoke outlet in the top of the normal-pressure condenser is connected with a chimney. The micro-pressure low-temperature superheated steam boiler has the advantages of being low in manufacturing and operating cost, compact in structure, safe to use, convenient to install and maintain and the like.

Description

Technical Field

[0001] This utility model relates to a steam boiler, and more particularly to a low-pressure, low-temperature superheated steam boiler. Background Technology

[0002] A superheated steam boiler is a type of boiler that uses a superheater to further heat saturated steam to a higher temperature, outputting steam with a temperature exceeding its saturation temperature at the current pressure, forming dry superheated steam. Existing superheated steam boilers typically integrate the superheater inside the boiler's high-temperature flue. By raising the steam parameters to a higher temperature and pressure, they meet the demands of power generation, industry, and other fields for high-efficiency, highly stable steam. They are a key piece of equipment in modern energy systems, characterized by their large size and high pressure, resulting in higher costs and the need for regular inspections to ensure safe operation.

[0003] However, there is a great demand for superheated steam boilers in some industries such as hospital sterilization and food processing, but their temperature requirements for superheated steam are relatively low (around 200°C), and the economic efficiency of using large superheated steam boilers with existing technology is poor. Utility Model Content

[0004] The purpose of this invention is to provide a low-pressure, low-temperature superheated steam boiler. The boiler is designed and operates at a pressure of less than 0.1 MPa. It does not require drawing approval, manufacturing supervision, installation notification, special equipment registration, or annual inspection, which can greatly reduce manufacturing costs and user operating costs.

[0005] The purpose of this utility model is achieved as follows: A low-pressure, low-temperature superheated steam boiler includes a horizontally arranged shell, a boiler inlet on the lower side of the shell, a furnace chamber in the lower right part of the shell, a burner connected to the front end of the furnace chamber outside the shell, a flue tube bundle on the upper left side of the furnace chamber, the rear end of the furnace chamber and the flue tube bundle connected to the combustion chamber, the front end of the flue tube bundle connected to the smoke box outside the front end of the shell, the flue outlet at the top of the smoke box connected to the superheater, the flue outlet at the top of the superheater connected to the atmospheric pressure condenser, and the flue outlet at the top of the atmospheric pressure condenser connected to the chimney.

[0006] This utility model of a low-pressure, low-temperature superheated steam boiler significantly reduces the shell pressure requirements by placing the superheater outside the shell, thereby greatly reducing manufacturing and user operating costs. Furthermore, the superheater's arrangement above the smoke box and the atmospheric pressure condenser's arrangement above the superheater result in a compact structure, small dimensions, and low manufacturing cost. Simultaneously, the unique right-lower-left-upper layout of the furnace and smoke tube bundle facilitates burner installation and smoke box door opening for maintenance. In summary, this utility model of a low-pressure, low-temperature superheated steam boiler offers advantages such as low manufacturing and operating costs, compact structure, safe operation, and convenient installation and maintenance.

[0007] As a further improvement of this utility model, the superheater is equipped with staggered finned heat exchange tubes, which greatly increases the heating area while reducing its external size.

[0008] As a further improvement of this utility model, the staggered finned heat exchange tube adopts carbon steel tube and stainless steel fins, which has low material cost, long service life and good heat exchange effect.

[0009] As a further improvement of this utility model, the combustion chamber is oval in shape and obliquely placed inside the shell with the left side higher than the right side, which saves space and facilitates the connection with the furnace shell and flue tube bundle. At the same time, the combustion chamber is located inside the shell, which can fully exchange heat in the water chamber and improve thermal efficiency.

[0010] As a further improvement of this utility model, the top of the shell is provided with a main steam valve interface, a first safety valve interface, a second safety valve interface, a vent valve interface and a pressure gauge interface to ensure the safe use of the boiler.

[0011] As a further improvement of this utility model, a ladder is provided on the outside of the shell, and the upper end of the ladder is connected to the maintenance platform set on the upper side of the shell, which facilitates the installation and maintenance of the boiler body and the atmospheric pressure condenser.

[0012] As a further improvement of this utility model, the furnace liner is made of corrugated material, which has stronger pressure-bearing capacity and larger heat exchange area.

[0013] As a further improvement of this utility model, the flue tube bundle adopts threaded flue tubes, which can significantly improve heat exchange efficiency and has stronger resistance to pressure and deformation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the low-pressure, low-temperature superheated steam boiler of this utility model.

[0015] Figure 2 for Figure 1 Top view.

[0016] Figure 3 for Figure 1 Side view.

[0017] Figure 4 for Figure 1 Cross-sectional view of KK.

[0018] The components include: 1. Shell, 2. Furnace, 3. Burner, 4. Smoke tube bundle, 5. Combustion chamber, 6. Smoke box, 7. Superheater, 8. Atmospheric condenser, 9. Chimney, 10. Boiler inlet, 11. Main steam valve interface, 12. First safety valve interface, 13. Second safety valve interface, 14. Vent valve interface, 15. Pressure gauge interface, 16. Ladder, 17. Maintenance platform, and 18. Staggered finned heat exchange tubes. Detailed Implementation

[0019] like Figure 1-4 The micro-pressure low-temperature superheated steam boiler shown includes a horizontally arranged shell 1.

[0020] A furnace chamber 2 is located in the lower right part of the shell 1. The front end of the furnace chamber 2 is connected to a burner 3 located outside the shell 1. A flue tube bundle 4 is located on the upper left side of the furnace chamber 2. The rear ends of the furnace chamber 2 and the flue tube bundle 4 are connected to a combustion chamber 5. The combustion chamber 5 is oval-shaped and obliquely positioned inside the shell with its left side higher than its right side, saving space and facilitating connection with the furnace chamber 2 and the flue tube bundle 4. Furthermore, the location of the combustion chamber 5 inside the shell 1 allows for sufficient heat exchange through a water cavity, improving thermal efficiency. The furnace chamber 2 is corrugated, providing stronger pressure resistance and a larger heat exchange area. The flue tube bundle 4 uses threaded flue tubes, significantly improving heat exchange efficiency and offering stronger resistance to pressure and deformation.

[0021] The front end of the flue tube bundle 4 is connected to the smoke box 6 located outside the front end of the shell 1. The flue outlet at the top of the smoke box 6 is connected to the superheater 7. The superheater 7 is equipped with staggered finned heat exchange tubes 18, which greatly increases the heating area while reducing its overall size. The staggered finned heat exchange tubes 18 are made of carbon steel tubes and stainless steel fins, which have a long service life and good heat exchange effect. The flue outlet at the top of the superheater 7 is connected to the atmospheric pressure condenser 8, and the flue outlet at the top of the atmospheric pressure condenser 8 is connected to the chimney 9.

[0022] The lower side of the shell 1 is provided with a boiler water inlet 10, and the top of the shell 1 is provided with a main steam valve interface 11, a first safety valve interface 12, a second safety valve interface 13, a vent valve interface 14 and a pressure gauge interface 15 to ensure the safe use of the boiler.

[0023] A ladder 16 is provided on the outside of the shell 1. The upper end of the ladder 16 is connected to the maintenance platform 17 located on the upper side of the shell 1, which facilitates the installation and maintenance of the boiler body and the atmospheric pressure condenser 8.

[0024] The low-pressure, low-temperature superheated steam boiler of this embodiment significantly reduces the pressure requirements of the shell 1 by placing the superheater 7 outside the shell 1, which can greatly reduce manufacturing and user operating costs. Furthermore, the superheater 7 is arranged above the smoke box 6, and the atmospheric pressure condenser 8 is arranged above the superheater 7, resulting in a compact structure, small size, and low manufacturing cost. Meanwhile, the special right-lower-left-upper layout design of the furnace liner 2 and the smoke tube bundle 4 facilitates the installation of the burner 3 and the opening and maintenance of the smoke box 6 door.

[0025] In this embodiment, the low-pressure, low-temperature superheated steam boiler has the following flue gas flow: burner → furnace chamber → combustion chamber → flue gas tube bundle → smoke box → superheater → atmospheric pressure condenser → chimney → atmosphere. The high-temperature flue gas first undergoes heat exchange through the flue gas tube bundle, then convective heat exchange through the low-temperature superheater, and finally further heat exchange through the atmospheric pressure condenser at the tail end before being discharged to the chimney. Ultimately, the boiler's exhaust gas temperature is reduced to below 60°C, resulting in a boiler design thermal efficiency of up to 102% and a significant reduction in fuel consumption.

[0026] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A micro-pressure low-temperature superheated steam boiler comprising a horizontally arranged shell, a boiler water inlet being arranged at the lower side of the shell, characterized in that: The lower right part of the shell is provided with a furnace, the front end of the furnace is connected with a burner arranged outside the shell, the left upper side of the furnace is provided with a smoke pipe bundle, the rear end of the furnace and the smoke pipe bundle is connected with a back combustion chamber, the front end of the smoke pipe bundle is connected with a smoke box arranged outside the front end of the shell, the top smoke outlet of the smoke box is connected with a superheater, the top smoke outlet of the superheater is connected with an atmospheric condenser, and the top smoke outlet of the atmospheric condenser is connected with a chimney.

2. The micro-pressure low-temperature overheat steam boiler according to claim 1, characterized in that: The superheater is internally provided with staggered finned heat exchange pipes.

3. The micro-pressure subcritical overheat steam boiler according to claim 2, characterized in that: The staggered finned heat exchange pipes adopt carbon steel pipes and stainless steel fins.

4. The micro-pressure subcritical overheat steam boiler according to claim 1, characterized in that: The back combustion chamber is obliquely arranged inside the shell in a waist-round shape and with the left side being higher than the right side.

5. The micro-pressure low-temperature overheat steam boiler according to claim 1, characterized in that: The top of the shell is provided with a main steam valve interface, a first safety valve interface, a second safety valve interface, a gas release valve interface and a pressure gauge interface.

6. The micro-pressure subcritical overheat steam boiler according to any one of claims 1-5, characterized in that: The outer side of the shell is provided with a crawling ladder, and the upper end of the crawling ladder is connected with an inspection platform arranged on the upper side of the shell.

7. The micro-pressure subcritical overheat steam boiler according to any one of claims 1-5, characterized in that: The furnace adopts a corrugated furnace.

8. The micro-pressure low-temperature overheat steam boiler according to any one of claims 1-5, characterized in that: The smoke pipe bundle adopts threaded smoke pipes.

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