Hot air drying system for fuel for float glass

Abstract

The utility model discloses a hot air drying system for fuel for float glass. The hot air drying system comprises a flue gas drying system and a hot air drying system, wherein the flue gas drying system is used for heating the fuel for the float glass by utilizing flue gas of a float glass melting furnace; the hot air drying system is used for heating the fuel for the float glass by utilizing hot air of a float glass annealing furnace; and the hot air drying system comprises an air inducing mechanism which is connected between the float glass annealing kiln and the fuel workshop for the float glass through a pipeline. And hot air discharged in the glass cooling process of the annealing furnace is used for heating and drying fuel used by the float glass melting furnace through the air inducing mechanism. A heat source of fuel used by the float glass melting furnace is from furnace flue gas subjected to desulfurization, denitration and dust removal; and hot air is introduced from the annealing kiln, so that no pollution factor is added. The drying effect of fuel used by the float glass melting furnace is improved, the fuel utilization rate is increased, the purposes of saving energy, reducing consumption, reducing emission and improving efficiency are achieved, and the device has great significance on energy benefits and environmental protection benefits.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler waste heat recovery and utilization, in particular to a hot air drying system for fuel used for float glass. Background Art

[0002] Under normal production conditions of float glass, part of the flue gas from the float glass melting furnace is used to heat fuel and remove moisture from the heating and grinding fuel after being desulfurized, denitrated and dusted. The glass ribbon of the float glass melting furnace is pulled out from the tin bath and then passes through the transition roller table before entering the annealing lehr. The temperature of the annealing lehr is generally around 550°C, which is used to eliminate the residual internal stress and optical instability in the float glass and stabilize the internal structure of the glass. The annealing process is a controlled cooling process, which transfers its own heat to the surrounding medium through the annealing fan in the form of air convection.

[0003] The hot gases from the annealing lehr are discharged directly into the outdoor atmosphere, resulting in energy loss. Utility Model Content

[0004] The purpose of the utility model is to solve the above-mentioned shortcomings of the background technology and provide a hot air drying system for float glass fuel which reasonably utilizes the hot air discharged from the annealing furnace to dry and heat the fuel and reduce energy loss.

[0005] To achieve this purpose, the hot air drying system for float glass fuel designed in the utility model includes a fume drying system that utilizes the fume of a float glass melting furnace to heat the float glass fuel and a hot air drying system that utilizes the hot air of a float glass annealing furnace to heat the float glass fuel; the hot air drying system includes an air induction mechanism connected between the float glass annealing furnace and the float glass fuel workshop through a pipeline.

[0006] Furthermore, the induced draft mechanism includes a hot air drying main pipe connected to the float glass fuel workshop and a hot air drying branch pipe connected between the hot air drying main pipe and the float glass annealing furnace, and the hot air drying main pipe is connected to a main induced draft fan.

[0007] Furthermore, the hot air drying branch pipe includes a first drying branch pipe connected between the A zone of the float glass annealing furnace and the hot air drying main pipe, and the first drying branch pipe is connected to a first branch pipe induced draft fan.

[0008] Furthermore, the hot air drying branch pipe includes a second drying branch pipe connected between the B zone of the float glass annealing furnace and the hot air drying main pipe, and the second drying branch pipe is connected to a second branch pipe induced draft fan.

[0009] Furthermore, the hot air drying branch pipe includes a third drying branch pipe connected between the C zone of the float glass annealing furnace and the hot air drying main pipe, and the third drying branch pipe is connected to a third branch pipe induced draft fan.

[0010] Furthermore, the air outlet of the first drying branch pipe includes a first hot air outlet connected to the hot air drying main pipe and a first direct exhaust air outlet connected to the atmosphere, and a first direct exhaust valve is provided at the first direct exhaust air outlet.

[0011] Furthermore, the air outlet of the second drying branch pipe includes a second hot air outlet connected to the hot air drying main pipe and a second direct exhaust air outlet connected to the atmosphere, and a second direct exhaust valve is provided at the second direct exhaust air outlet.

[0012] Furthermore, the air outlet of the third drying branch pipe includes a third hot air outlet connected to the hot air drying main pipe and a third direct exhaust air outlet connected to the atmosphere, and a third direct exhaust valve is provided at the third direct exhaust air outlet.

[0013] Furthermore, the fume drying system includes a fume introduction mechanism connected between the float glass melting furnace and the float glass fuel workshop through a pipeline.

[0014] Furthermore, the smoke induction mechanism includes a boiler connected to the float glass melting furnace through a pipeline and a desulfurization and bag dust removal system connected to the flue gas outlet of the boiler through a pipeline, and the flue gas outlet of the desulfurization and bag dust removal system is connected to the float glass fuel workshop through a pipeline.

[0015] The beneficial effect of the utility model is that the hot air discharged during the cooling process of the annealing furnace glass is used to heat and dry the fuel used in the float glass melting furnace through the induced draft mechanism. The heat source of the fuel used in the float glass melting furnace comes from the furnace flue gas after desulfurization, denitrification and dust removal, and the hot air introduced from the annealing furnace, without any new pollution factors. The drying effect of the fuel used in the float glass melting furnace is improved, the fuel utilization rate is improved, and the purpose of energy saving, consumption reduction, emission reduction and efficiency improvement is achieved, which is of great significance to energy efficiency and environmental protection benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a hot air drying system for float glass fuel designed for the utility model;

[0017] Figure 2 A schematic diagram of a hot air drying system designed for the utility model that utilizes hot air from a float glass annealing furnace to heat fuel for float glass;

[0018] Among them, 1—float glass melting furnace, 2—float glass annealing furnace, 3—float glass fuel workshop, 4—hot air drying main pipe, 5—main induced draft fan, 6—first drying branch pipe, 7—first branch induced draft fan, 8—second drying branch pipe, 9—second branch induced draft fan, 10—third drying branch pipe, 11—third branch induced draft fan, 12—first hot air outlet, 13—first direct exhaust outlet, 14—first direct exhaust valve, 15—second hot air outlet, 16—second direct exhaust outlet, 17—second direct exhaust valve, 18—third hot air outlet, 19—third direct exhaust outlet, 20—third direct exhaust valve, 21—boiler, 22—desulfurization and bag dust removal system, 23—generator set, 24—electrostatic precipitator and flue gas denitrification system, 25—chimney. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] like Figure 1 The hot air drying system for float glass fuel shown in FIG. 2 comprises a fume drying system for heating float glass fuel using the fume of float glass melting furnace 1 and a hot air drying system for heating float glass fuel using the hot air of float glass annealing furnace 2.

[0021] The hot air drying system includes an air induction mechanism connected between the float glass annealing furnace 2 and the float glass fuel workshop 3 through a pipeline. The air induction mechanism includes a hot air drying main pipe 4 connected to the float glass fuel workshop 3 and a hot air drying branch pipe connected between the hot air drying main pipe 4 and the float glass annealing furnace 2, and a main pipe induced draft fan 5 is connected to the hot air drying main pipe 4. The hot air drying branch pipe includes a first drying branch pipe connected between the A zone of the float glass annealing furnace 2 and the hot air drying main pipe 4, a second drying branch pipe 8 connected between the B zone of the float glass annealing furnace 2 and the hot air drying main pipe 4, and a third drying branch pipe 10 connected between the C zone of the float glass annealing furnace 2 and the hot air drying main pipe 4; the first branch pipe induced draft fan 7 is connected to the first drying branch pipe 6, the second branch pipe induced draft fan 9 is connected to the second drying branch pipe 8, and the third branch pipe induced draft fan 11 is connected to the third drying branch pipe 10. The air outlet of the first drying branch pipe 6 includes a first hot air outlet 12 connected to the hot air drying main pipe 4 and a first direct exhaust air outlet 13 connected to the atmosphere, and a first direct exhaust valve 14 is provided at the first direct exhaust air outlet 13. The air outlet of the second drying branch pipe 8 includes a second hot air outlet 15 connected to the hot air drying main pipe 4 and a second direct exhaust air outlet 16 connected to the atmosphere, and a second direct exhaust valve 17 is provided at the second direct exhaust air outlet 16. The air outlet of the third drying branch pipe 10 includes a third hot air outlet 18 connected to the hot air drying main pipe 4 and a third direct exhaust air outlet 19 connected to the atmosphere, and a third direct exhaust valve 20 is provided at the third direct exhaust air outlet 19. The exhaust air temperature of zone A of the float glass annealing furnace 2 is 420°C, and the air volume is 41303Nm3 / h; the exhaust air temperature of zone B is 350°C, and the air volume is 26480Nm3 / h; the exhaust air temperature of zone C is 300°C, and the air volume is 36303Nm3 / h.

[0022] The smoke drying system includes a smoke induction mechanism connected between the float glass melting furnace 1 and the float glass fuel workshop 3 through a pipeline. The smoke induction mechanism includes a boiler 21 connected to the float glass melting furnace 1 through a pipeline and a desulfurization and bag dust removal system 22 connected to the smoke outlet of the boiler 21 through a pipeline, and the smoke outlet of the desulfurization and bag dust removal system 22 is connected to the float glass fuel workshop 3 through a pipeline.

[0023] In summary, the utility model uses the induced draft mechanism to heat and dry the fuel used in the float glass melting furnace by using the hot air discharged during the glass cooling process in the annealing furnace. The heat source of the fuel used in the float glass melting furnace comes from the furnace flue gas after desulfurization, denitrification and dust removal, and the hot air introduced from the annealing furnace, without any new pollution factors. The drying effect of the fuel used in the float glass melting furnace is improved, the fuel utilization rate is improved, and the purpose of energy saving, consumption reduction, emission reduction and efficiency improvement is achieved, which is of great significance to energy efficiency and environmental protection benefits.

[0024] The above are only preferred embodiments of the present invention, and do not limit the structure of the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A hot air drying system for float glass fuel, comprising a fume drying system for heating float glass fuel using fume from a float glass melting furnace (1), characterized in that: It also includes a hot air drying system for heating float glass fuel using hot air from a float glass annealing furnace (2); the hot air drying system includes an air induction mechanism connected between the float glass annealing furnace (2) and a float glass fuel workshop (3) through a pipeline.

2. The hot air drying system for float glass fuel according to claim 1, characterized in that: The induced draft mechanism comprises a hot air drying main pipe (4) connected to the float glass fuel workshop (3) and a hot air drying branch pipe connected between the hot air drying main pipe (4) and the float glass annealing furnace (2); the hot air drying main pipe (4) is connected to a main induced draft fan (5).

3. The hot air drying system for float glass fuel according to claim 2, characterized in that: The hot air drying branch pipe comprises a first drying branch pipe (6) connected between the A zone of the float glass annealing furnace (2) and the hot air drying main pipe (4), and the first drying branch pipe (6) is connected to a first branch pipe induced draft fan (7).

4. The hot air drying system for float glass fuel according to claim 3, characterized in that: The hot air drying branch pipe comprises a second drying branch pipe (8) connected between the B zone of the float glass annealing furnace (2) and the hot air drying main pipe (4), and the second drying branch pipe (8) is connected to a second branch pipe induced draft fan (9).

5. The hot air drying system for float glass fuel according to claim 4, characterized in that: The hot air drying branch pipe comprises a third drying branch pipe (10) connected between the C zone of the float glass annealing furnace (2) and the hot air drying main pipe (4), and the third drying branch pipe (10) is connected to a third branch pipe induced draft fan (11).

6. The hot air drying system for float glass fuel according to claim 3, characterized in that: The air outlet of the first drying branch pipe (6) comprises a first hot air outlet (12) connected to the hot air drying main pipe (4) and a first direct exhaust air outlet (13) connected to the atmosphere, and a first direct exhaust valve (14) is provided at the first direct exhaust air outlet (13).

7. The hot air drying system for float glass fuel according to claim 4, characterized in that: The air outlet of the second drying branch pipe (8) comprises a second hot air outlet (15) connected to the hot air drying main pipe (4) and a second direct exhaust air outlet (16) connected to the atmosphere, and a second direct exhaust valve (17) is provided at the second direct exhaust air outlet (16).

8. The hot air drying system for float glass fuel according to claim 5, characterized in that: The air outlet of the third drying branch pipe (10) comprises a third hot air outlet (18) connected to the hot air drying main pipe (4) and a third direct exhaust air outlet (19) connected to the atmosphere, and a third direct exhaust valve (20) is provided at the third direct exhaust air outlet (19).

9. The hot air drying system for float glass fuel according to claim 1, characterized in that: The fume drying system comprises a fume entraining mechanism connected between the float glass melting furnace (1) and the float glass fuel workshop (3) through a pipeline.

10. The hot air drying system for float glass fuel according to claim 9, characterized in that: The smoke introduction mechanism comprises a boiler (21) connected to the float glass melting furnace (1) through a pipeline and a desulfurization and bag dust removal system (22) connected to the smoke outlet of the boiler (21) through a pipeline, and the smoke outlet of the desulfurization and bag dust removal system (22) is connected to the float glass fuel workshop (3) through a pipeline.

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