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Precoated sand hot-process regeneration equipment and regeneration method

A technology of thermal regeneration and coated sand, which is used in foundry molding equipment, metal processing equipment, machinery for cleaning/processing of casting materials, etc. Recycling and other issues

Inactive Publication Date: 2014-07-02
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing thermal regeneration furnaces in my country are mainly fluidized regeneration furnaces, and there are also moving bed furnaces, which mainly use gas, coke or coal gasification gas as fuel. Although the air preheater is arranged, the exhaust gas temperature is high and the side of the furnace Sand sensible heat cannot be recovered after material regeneration. Therefore, there are common problems such as low thermal efficiency and short furnace life, and the regeneration furnace has not formed a standardized product; Release, also caused secondary pollution to the environment, seriously affected its promotion and application prospects

Method used

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  • Precoated sand hot-process regeneration equipment and regeneration method
  • Precoated sand hot-process regeneration equipment and regeneration method
  • Precoated sand hot-process regeneration equipment and regeneration method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The film-coated sand thermal regeneration equipment of this embodiment includes a vertical fluidized bed furnace 3, a hopper 1, a counter-spray gas nozzle 5, a flue 10, a smoke exhaust pipe 11, a partition cooler 8 and an air preheater 15 , the feeding hopper 1 is arranged on the top of the vertical fluidized bed furnace 3, and the opposite gas injection nozzle 5 is in the middle and lower part of the furnace cavity of the vertical fluidized bed furnace 3, and the furnace cavity of the vertical fluidized bed furnace 3 passes through the flue 10 It communicates with the smoke exhaust pipe 11, and the end of the smoke exhaust pipe 11 is provided with an induced draft fan 12; the partition cooler 8 is arranged below the vertical fluidized bed furnace 3, and the top of the partition cooler 8 passes through the shakeout pipe 6 Connected with the vertical fluidized bed furnace 3; the bottom of the vertical fluidized bed furnace 3 is provided with an air distribution plate 23, ...

Embodiment 2

[0028] The film-coated sand thermal regeneration equipment of this embodiment is the same as that of Embodiment 1 except for the following differences:

[0029]The joints of the flue 10, the smoke exhaust pipe 11 and the air preheater 15 are respectively provided with water-cooled coils 13, and the water-cooled coils 13 are connected to the water tank 24 through the circulating water pump 14, and the top of the vertical fluidized bed furnace 3 furnace chamber is provided with There is a triangular internal fixture 2, the bottom of the air preheater 15 is provided with an ash hopper 25 communicating with the cavity, the feeding hopper 1 is provided with a strip-shaped orifice plate 22, and the angle between the gas injection nozzle 5 and the furnace wall is 20° °, the cross section of the vertical fluidized bed furnace 3 is circular.

Embodiment 3

[0031] The film-coated sand thermal regeneration equipment of this embodiment is the same as that of Embodiment 1 except for the following differences:

[0032] The joints of the flue 10, the smoke exhaust pipe 11 and the air preheater 15 are respectively provided with water-cooled coils 13, and the water-cooled coils 13 are connected to the water tank 24 through the circulating water pump 14, and the top of the vertical fluidized bed furnace 3 furnace chamber is provided with There is a wedge-shaped inner piece 2; the bottom of the air preheater 15 is provided with an ash hopper 25 connected with the cavity; the side of the vertical fluidized bed furnace 3 is provided with a side discharge port 4, which is connected with the vertical fluidized bed furnace A valve 21 is provided between the chemical bed furnace 3; a strip-shaped orifice plate 22 is provided on the hopper 1; a flow regulating valve 7 is provided between the shakeout pipe 6 and the partition cooler 8; The includ...

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Abstract

The invention belongs to the technical field of energy engineering, and relates to precoated sand hot-process regeneration equipment mainly utilizing a vertical fluidized bed furnace and a precoated sand hot-process regeneration method. The precoated sand hot-process regeneration equipment comprises a vertical fluidized bed furnace, a charging hopper, a nozzle for oppositely spraying coal gas, a flue, a smoke discharging pipeline, a dividing wall cooler and an air preheater, wherein the dividing wall cooler is arranged below the vertical fluidized bed furnace, the top end of the dividing wall cooler is connected with the vertical fluidized bed furnace through a sand falling pipe, the air inlet of the dividing wall cooler is connected with an air blower, the air outlet of the dividing wall cooler is connected with the air preheater through a hot air pipe I, the inlet of an air conveying pipe of the air preheater is communicated with the hot air pipe I, the outlet of the air conveying pipe is communicated with an air chamber through a hot air pipe II, and the flue is connected with the smoke discharging pipeline through a cavity of the air preheater. The precoated sand hot-process regeneration method comprises the steps: starting, feeding, and stabilizing. The precoated sand hot-process regeneration equipment is high in energy utilization rate, perfect in regeneration, simple in operation, and energy-saving and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of energy engineering, and in particular relates to a film-coated sand thermal regeneration equipment and a film-coated sand thermal regeneration method mainly based on a vertical fluidized bed furnace. Background technique: [0002] In the 1950s, my country began to study the casting process of coated sand and shell (core), which has been widely used in recent years. Due to the rapid development of my country's automobile industry and the need for foreign trade export of mechanical products, as well as the development of the casting international market, the requirements for the quality of castings are getting higher and higher. The application of coated sand has grown rapidly, and the annual consumption of many manufacturers has reached thousands of tons. It is of great practical significance to study the regeneration and reuse of old coated sand. Recycling can not only improve the performance of coated san...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C5/00
Inventor 王翠苹李刚王凤印李厚洋姜旭
Owner QINGDAO UNIV
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