Hot repair operation pressure control system and method for ultrathin electronic glass melting furnace

Abstract

The invention relates to a hot repair operation pressure control system and method for an ultrathin electronic glass melting furnace. The hot repair operation pressure control system comprises a combustion-supporting air reversing device, a branch flue adjusting flashboard, a furnace pressure adjusting flashboard and an air supplementing and pressure adjusting control device, the combustion-supporting air reversing device is arranged at a branch flue opening, and the air supplementing and pressure adjusting control device is arranged on the ash scraping door and used for adjusting and stabilizing the internal pressure of the system and supplementing air. When the heat storage chamber is subjected to hot repair, the combustion-supporting air reversing device adjusts the combustion-supporting air quantity direction, closes the branch flue adjusting flashboard of the heat storage chamber in the hot repair state, increases the opening of the branch flue adjusting flashboard of the heat storage chamber in the non-hot repair state, and controls the air supplementing and pressure regulating control device to supplement the air inlet quantity of the heat storage chamber. And the pressure in the kiln is controlled through opening and closing of the kiln pressure adjusting flashboard. Pressure and flame combustion control in the hot repair period of the regenerative chamber of the melting furnace is enhanced, pressure fluctuation and air supply amount are accurately controlled, and the operation stability of the melting furnace in the hot repair period is improved.

Description

Technical Field

[0001] The invention belongs to the field of ultra-thin glass production, and in particular relates to a pressure control system and method for hot repair operations of an ultra-thin electronic glass melting furnace. Background Art

[0002] The ultra-thin electronic glass melting furnace is one of the key equipment in the production of ultra-thin electronic glass. At present, with the change of market demand and the further intensification of market competitiveness, the technological upgrading and transformation of the ultra-thin electronic glass production line is imperative.

[0003] As the kiln age of the ultra-thin electronic glass production line is significantly delayed, the thermal repair, unblocking and lattice replacement operations in the heat storage chamber become more frequent. The stability of the melting furnace during operation has a greater impact on the product quality. The ash removal door structure of the heat storage chamber of the ultra-thin electronic glass production line is still built with brick structure, which is difficult to dismantle and restore during thermal repairs, and it is impossible to accurately control the kiln pressure and combustion stability, which cannot meet actual production needs. Summary of the invention

[0004] The technical problem of the present invention is that the pressure control during the hot repair of the melting furnace regenerator is difficult, the combustion is unstable, the pressure fluctuation is large and the air supply volume is uncontrollable.

[0005] The purpose of the present invention is to solve the above problems and propose a pressure control system for hot repair operation of ultra-thin electronic glass melting furnace, including: a combustion air reversing device, a flue gas duct regulating damper, a kiln pressure regulating damper and a supplementary air pressure regulating control device; The combustion air reversing device is installed at the branch flue outlet, which is used for the supply and reversal of combustion air; The flue regulating damper is used to control the gas flow in the flue; The kiln pressure regulating gate controls the inflow and outflow of gas in the kiln by adjusting the opening of the gate, thereby controlling the pressure in the kiln. The air supply pressure regulating control device is installed on the dust removal door and is used to adjust and stabilize the internal pressure of the system and replenish air.

[0006] Preferably, a pressure control system for hot repair operations of an ultra-thin electronic glass melting furnace also includes a hanging slide, a pulley block and an ash removal door frame, wherein the hanging slide is arranged on a column near the heat storage chamber, and the pulley block hangs the ash removal door frame through the hanging slide for installing and removing the ash removal door frame.

[0007] Furthermore, the ash removal door adopts a steel frame insulation structure.

[0008] Furthermore, during the installation of the dust removal door frame, an insulation module is used for filling and sealing.

[0009] Preferably, a plurality of observation windows are provided on the heat storage chamber for observing the internal structure of the heat storage chamber and the changes in the blockage of the grid body.

[0010] Furthermore, in the above-mentioned pressure control method for hot repair operation of an ultra-thin electronic glass melting furnace, when the heat storage chamber is undergoing hot repair, the combustion-supporting air reversing device adjusts the direction of the combustion-supporting air volume, closes the branch flue regulating gate of the heat storage chamber in the hot repair state, increases the opening of the branch flue regulating gate of the heat storage chamber in the non-hot repair state, and manipulates the air supply pressure regulating control device to supplement the air intake of the heat storage chamber, thereby controlling the pressure in the kiln by opening and closing the kiln pressure regulating gate.

[0011] Compared with the prior art, the beneficial effects of the present invention include: 1) The present invention proposes a pressure control system for the hot repair operation of an ultra-thin electronic glass melting furnace, which strengthens the pressure and flame combustion control during the hot repair of the melting furnace regenerator, accurately controls the pressure fluctuation and air supply volume, and improves the operation stability of the melting furnace during the hot repair.

[0012] 2) The pressure control system for hot repair of ultra-thin electronic glass melting furnaces makes it easier to clean the bottom of the melting furnace regenerator, dredge and clean the grid, and conduct daily inspections, thus reducing the cost of upgrading and renovating old melting furnaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 AA cross-sectional view of a pressure control system for a melting furnace hot repair operation according to an embodiment of the present invention; Figure 2 It is a schematic structural diagram of a pressure control system for a melting furnace hot repair operation according to an embodiment of the present invention; Figure numerals: combustion-supporting air reversing device 1, flue gas duct regulating gate 2, kiln pressure regulating gate 3, air supply pressure regulating control device 4, hanging slide 5, pulley block 6, ash removal door frame 7, insulation module 8, observation window 9. DETAILED DESCRIPTION

[0015] like Figure 1 and Figure 2 As shown, a pressure control system for hot repair operation of an ultra-thin electronic glass melting furnace comprises: a combustion air reversing device 1, a flue gas duct regulating damper 2, a kiln pressure regulating damper 3 and a supplementary air pressure regulating control device 4; The combustion air reversing device 1 is arranged at the branch flue port, and is used for supplying and reversing the combustion air; The flue regulating damper 2 is used to control the gas flow in the flue; The kiln pressure regulating gate 3 controls the inflow and outflow of gas in the kiln by adjusting the opening of the gate, thereby controlling the pressure in the kiln; The air supply pressure regulating control device 4 is arranged on the dust removal door, and is used to adjust and stabilize the internal pressure of the system and to supply air.

[0016] It also includes a hanging slide 5, a pulley block 6 and an ash-removing door frame 7. The hanging slide 5 is arranged on a column near the heat storage chamber. The pulley block 6 hangs the ash-removing door frame 7 through the hanging slide 5 for installing and removing the ash-removing door frame 7.

[0017] The ash-proof door adopts a steel frame insulation structure.

[0018] During the installation of the dust removal door frame 7, the heat preservation module 8 is used for filling and sealing.

[0019] The regenerator is provided with a plurality of observation windows 9 for observing the internal structure of the regenerator and the changes of the grid body blockage.

[0020] As described above, in the method for controlling the hot repair operation pressure of an ultra-thin electronic glass melting furnace of the pressure control system for hot repair operation of an ultra-thin electronic glass melting furnace, when the heat storage chamber is undergoing hot repair, the combustion-supporting air reversing device 1 adjusts the direction of the combustion-supporting air volume, closes the branch flue regulating gate plate 2 of the heat storage chamber in the hot repair state, increases the opening of the branch flue regulating gate plate 2 of the heat storage chamber in the non-hot repair state, and manipulates the air supply pressure regulating control device 4 to supplement the air intake of the heat storage chamber, thereby controlling the pressure in the kiln by opening and closing the kiln pressure regulating gate plate 3.

[0021] In order to better illustrate the effectiveness of the method in this paper, the method of controlling the pressure and air volume by the operation on the upper side and the temporary iron sheet before implementation is selected as a comparison. The comparison results are shown in Table 1: Table 1

[0022] As shown in Table 1, after applying the present invention, the pressure fluctuation range and combustion stability are significantly improved, thereby improving the operating stability of the melting furnace during the hot repair period.

[0023] In addition, the present invention makes daily inspection more convenient. During the thermal repair period before implementation, the number of bubbles detected by the defect detector is 100-1000 per hour, and during the thermal repair period after implementation, the number of bubbles detected by the defect detector is about 100. The production fluctuation is significantly reduced, and the bubbles and stone defects on the plate surface are effectively controlled. The bottom cleaning of the melting furnace heat storage chamber, the dredging and cleaning of the grid body and daily inspection are also more convenient.

[0024] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A pressure control system for hot repair of ultra-thin electronic glass melting furnace, characterized in that: include: A combustion-supporting air reversing device (1), a flue gas duct regulating damper (2), a kiln pressure regulating damper (3) and a supplementary air pressure regulating control device (4); The combustion-supporting air reversing device (1) is arranged at the outlet of the branch flue and is used for supplying and reversing the combustion-supporting air; The branch flue regulating damper (2) is used to control the gas flow in the flue; The kiln pressure regulating gate (3) controls the inflow and outflow of gas in the kiln by adjusting the opening of the gate, thereby controlling the pressure in the kiln; The air supply pressure regulating control device (4) is arranged on the dust removal door and is used to regulate and stabilize the internal pressure of the system and to supply air.

2. According to claim 1, a pressure control system for hot repair of ultra-thin electronic glass melting furnace, characterized in that: It also includes a hanging slideway (5), a pulley block (6) and an ash removal door frame (7), wherein the hanging slideway (5) is arranged on a column near the heat storage chamber, and the pulley block (6) hangs the ash removal door frame (7) via the hanging slideway (5) for installing and removing the ash removal door frame (7).

3. According to claim 2, a pressure control system for hot repair of ultra-thin electronic glass melting furnace, characterized in that: The ash removal door adopts a steel frame heat preservation structure.

4. According to claim 3, a pressure control system for hot repair of ultra-thin electronic glass melting furnace, characterized in that: During the installation of the dust removal door frame (7), the thermal insulation module (8) is used for filling and sealing.

5. According to claim 1, a pressure control system for hot repair of ultra-thin electronic glass melting furnace, characterized in that: The heat storage chamber is provided with a plurality of observation windows (9) for observing the internal structure of the heat storage chamber and changes in the blockage of the grid body.

6. The method for controlling the pressure of an ultra-thin electronic glass melting furnace for hot repairing operation of a pressure control system for hot repairing operation of an ultra-thin electronic glass melting furnace as claimed in claim 1, characterized in that: When the regenerator is undergoing hot repair, the combustion-supporting air reversing device (1) adjusts the direction of the combustion-supporting air volume, closes the branch flue regulating damper (2) of the regenerator in the hot repair state, increases the opening of the branch flue regulating damper (2) of the regenerator in the non-hot repair state, and controls the air supply pressure regulating control device (4) to supplement the air intake volume of the regenerator, thereby controlling the pressure in the kiln by opening and closing the kiln pressure regulating damper (3).

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