阅读说明：本技术 一种钢化玻璃加热炉节能利用系统 (Energy-saving utilization system of toughened glass heating furnace ) 是由 刘效洲 朱睿 高富强 周立 于 2021-08-11 设计创作，主要内容包括：本发明公开一种钢化玻璃加热炉节能利用系统,包括密闭的加热炉体,所述炉体在两侧设置有供钢化玻璃及辊棒进出的通孔,所述加热炉体内按钢化玻璃加热行进方向依次设置预热区间、加热区间和冷却区间,所述冷却区间设置热风引流支管通过风机与所述预热区间连接；所述预热区间的排放烟气通过风机与第二换热器连接,第二换热器通过管路与第三换热器连接。本发明具有如下优点：充分回收生产流程中三个工作区间的排放余热,在密闭空间内可以避免外界冷空气大量进入炉内,造成能耗增加；同时提高钢化玻璃的预热温度,进一步节能降耗；可以充分利用窑炉余热,不但可以节约运行成本,还可以减少气体污染物的排放量。(The invention discloses an energy-saving utilization system of a toughened glass heating furnace, which comprises a closed heating furnace body, wherein through holes for toughened glass and a roller rod to pass in and out are formed in two sides of the furnace body; the exhaust flue gas in the preheating section is connected with a second heat exchanger through a fan, and the second heat exchanger is connected with a third heat exchanger through a pipeline. The invention has the following advantages: the waste heat discharged from three working areas in the production process is fully recovered, and the increase of energy consumption caused by the fact that a large amount of external cold air enters the furnace can be avoided in the closed space; meanwhile, the preheating temperature of the toughened glass is increased, so that the energy is further saved and the consumption is reduced; the waste heat of the kiln can be fully utilized, the operation cost can be saved, and the emission of gas pollutants can be reduced.)

1. The energy-saving utilization system of the toughened glass heating furnace is characterized by comprising a closed heating furnace body, wherein through holes for the toughened glass and a roller to pass in and out are formed in two sides of the heating furnace body; the exhaust flue gas in the preheating section is connected with a second heat exchanger through a fan, and the second heat exchanger is connected with a third heat exchanger through a pipeline.

2. The energy-saving utilization system of the toughened glass heating furnace according to claim 1, wherein the water tank is connected with a water inlet of the second heat exchanger through a pipeline, a water outlet of the second heat exchanger is connected with a water inlet of the steam generator, a steam outlet of the steam generator is connected with an inlet of the screw generator, and an outlet of the screw generator is connected with the water tank through a return pipeline.

3. The energy-saving utilization system of the toughened glass heating furnace according to claim 2, wherein a water replenishing branch is provided to be connected with the water tank through a third heat exchanger.

4. The energy-saving utilization system of the toughened glass heating furnace according to claim 2, wherein the discharge pipe of the heating section is connected with the air inlet of the first heat exchanger, the air outlet of the first heat exchanger is connected with the air inlet of the steam generator through a third fan, and the air outlet of the steam generator is connected with the second air inlet of the third heat exchanger.

5. The energy-saving utilization system of the toughened glass heating furnace according to claim 4, wherein a temperature adjusting pipeline is connected with an air inlet of the first heat exchanger through a fourth fan, and an air outlet of the first heat exchanger is connected with an air equalizing pipe arranged above the heating section.

6. The energy-saving utilization system of the toughened glass heating furnace according to claim 5, wherein the air equalizing pipe is arranged above the roller way in the heating area and is 80-200 mm away from the surface of the toughened glass.

7. The energy-saving utilization system of the tempered glass heating furnace as claimed in claim 6, wherein the heating zone is divided into a front section and a rear section, and temperature measuring devices are respectively installed at the front section and the rear section.

8. The energy-saving utilization system of a tempered glass heating furnace as claimed in claim 7, wherein the air equalizing pipes are composed of two groups of front section parts and rear section parts, a control valve is installed on a main pipe of each group, and the hot air flow rate is automatically adjusted according to the temperature fed back by the temperature measuring device of the front section or the rear section to ensure that the temperatures of the front section and the rear section are maintained at a set constant value.

9. The energy-saving utilization system of the tempered glass heating furnace as claimed in claim 2, wherein a partition plate is provided between the adjacent preheating section, heating section or cooling section, and a through hole for passing the roller way is provided on the partition plate.

10. The energy-saving utilization system of the toughened glass heating furnace according to claim 2, wherein the power output end of the screw generator is connected with the fan and the control valve through wires.

Technical Field

The invention relates to the technical field of toughened glass production, in particular to an energy-saving utilization system of a toughened glass heating furnace.

Background

The toughened glass is a kind of prestressed glass, and its production principle is that the annealed glass is processed into required size and shape, and then heated to softening point temp. by high temp. and then quenched so as to obtain the invented product. The toughened glass has higher mechanical strength, impact strength and bending strength, and has good safety and thermal stability, and is the most common safe glass at present. Therefore, the toughened glass is widely applied to the fields of buildings, automobiles, household appliances, furniture, electronics, instruments and the like.

At present, the production process of toughened glass mainly comprises two types of physical toughening and chemical toughening. The physical toughened glass is mainly prepared by heating common plate glass to the softening temperature close to the glass in a heating furnace, eliminating internal stress through self deformation, and finally quenching. Chemically tempered glass generally has improved glass strength by changing the chemical composition of the glass surface by ion exchange. Compared with physical toughened glass, the chemical toughened glass has long production period and low efficiency, so that the production cost is high. Therefore, the toughened glass is mostly prepared by a physical toughening method in the current production of toughened glass.

In the existing production process of physical tempering of tempered glass, cleaned glass is horizontally placed on a roller way and sent into a tempered glass heating furnace through the roller way for heating treatment. The traditional heating furnace only has a heating interval (divided into a first interval and a second interval) and a cooling interval (a third interval): a first interval: the heating temperature is 450-500 ℃, and the heating time is 100-250 s; a second interval: the heating temperature is 680-700 ℃, and the heating time is 200-300 s; third zone (cooling zone): the temperature is reduced to below 500 ℃. In above-mentioned toughened glass heating furnace, each interval is according to respective heating methods intensification or cooling respectively, then directly emits into the atmosphere with the waste heat flue gas that has the high temperature respectively, also pollutes the environment when the power consumption, has more increased manufacturing cost, needs urgent need to improve.

Disclosure of Invention

The invention aims to provide an energy-saving utilization system of a toughened glass heating furnace, which aims to overcome the defects of the prior art, increases preheating intervals, comprehensively recovers waste heat discharged by each interval, optimizes a heating mode, and achieves the effects of saving energy, reducing emission and reducing production cost while ensuring the product quality.

In order to achieve the purpose of the invention, the invention adopts the technical scheme that: an energy-saving utilization system of a toughened glass heating furnace comprises a closed heating furnace body, through holes for toughened glass and a roller rod to pass in and out are formed in two sides of the heating furnace body, a preheating area, a heating area and a cooling area are sequentially arranged in the heating furnace body according to the heating advancing direction of the toughened glass, and a hot air drainage branch pipe is arranged in the cooling area and is connected with the preheating area through a fan; a fan is arranged at the positions of the roller rod and the glass outlet through hole in the cooling area, and blows outdoor cold air into the cooling area to forcibly cool the toughened glass in the cooling area; the exhaust flue gas in the preheating section is connected with a second heat exchanger through a fan, and the second heat exchanger is connected with a third heat exchanger through a pipeline.

The water tank is connected with the water inlet of the second heat exchanger through a pipeline, the water outlet of the second heat exchanger is connected with the water inlet of the steam generator, the steam outlet of the steam generator is connected with the inlet of the screw generator, the outlet of the screw generator is connected with the water tank through a return pipeline, water in the water tank is heated to about 150 ℃ after being subjected to heat exchange through the second heat exchanger, steam of about 380 ℃ is generated after passing through the steam generator, and condensed water formed after the screw generator is pushed to do work and generate electricity flows back into the water tank to form electricity generation circulation.

And the water supplementing branch is connected with the water tank through a third heat exchanger and used for supplementing water with power generation circulation loss.

The exhaust pipe of the heating area is connected with the air inlet of the first heat exchanger, the air outlet of the first heat exchanger is connected with the air inlet of the steam generator through the third fan, and the air outlet of the steam generator is connected with the second air inlet of the third heat exchanger and then exhausted through the chimney.

The temperature adjusting pipeline is connected with an air inlet of the first heat exchanger through a fourth fan, an air outlet of the first heat exchanger is connected with an air equalizing pipe on the heating section, hot air is sprayed into the heating section at a high speed, air flow in the heating section is stirred, heat generated by an electric heater arranged in the heating section is forcibly transferred to toughened glass, meanwhile, the temperature of the heating section is adjusted to enable the temperature of the heating section to be kept uniform from top to bottom, and meanwhile, air leaked from the heating section through a partition plate and entering the cooling section is supplemented.

The air equalizing pipe is arranged above the roller way in the heating area and is 80-200 mm away from the surface of the toughened glass.

Preferably, a plurality of air outlet holes are arranged on the air equalizing pipe, and the diameter of each air outlet hole is 3-5 mm.

The heating region is divided into a front section and a rear section, and temperature measuring devices are respectively arranged on the front section and the rear section.

The air equalizing pipe consists of two groups of front section parts and rear section parts, a control valve is arranged on a main pipe of each group, and the hot air flow of the air equalizing pipe is automatically adjusted according to the temperature fed back by the temperature measuring device of the front section or the rear section so as to ensure that the temperature of the front section and the rear section is maintained at a set constant value.

The adjacent preheating section, the heating section or the cooling section can be provided with a partition plate interval, and the partition plate is provided with a through hole for the toughened glass and the roller way to pass through.

The power output end of the screw generator is connected with the fan, the control valve and the like through electric wires and used for providing power required by operation, and the screw generator is self-used after power generation, so that energy can be effectively saved.

Compared with the prior art, the invention has the following advantages: the waste heat discharged by two heating areas and one cooling area in the production flow of the toughened glass heating furnace is fully utilized for temperature regulation, and the phenomenon that a large amount of external cold air enters the furnace to increase energy consumption can be avoided in a closed space; meanwhile, the preheating temperature of the toughened glass is increased, so that the energy is further saved and the consumption is reduced; the waste heat discharged can be fully utilized, the operation cost can be saved, and the discharge amount of gas pollutants can be reduced.

Drawings

FIG. 1 is a schematic structural view of an energy-saving utilization system of a tempered glass heating furnace according to the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings. Wherein the drawings are for illustrative purposes only and are not to be construed as limiting the invention; for a better understanding of the present embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.

The utility model provides a toughened glass heating furnace energy-conservation utilizes system, as shown in figure 1, it includes basically airtight and integrative heating furnace body, the heating furnace body both sides only are provided with the through-hole that supplies toughened glass and roller stick business turn over, set gradually according to toughened glass heating advancing direction in the heating furnace body and preheat interval 11, heating interval 12 and cooling interval 13, can set up the baffle interval between adjacent preheating interval 11, heating interval 12 or cooling interval 13, set up the through-hole that is used for making toughened glass and roller stick to pass through on the baffle. Set up fifth fan 44 outside cooling interval 13, fifth fan 44 is through export through-hole department to the interior blast outdoor cold air of cooling interval 13 and carry out forced cooling to wherein toughened glass, improves the cooling effect and promotes toughened glass's quality. The cooling interval 13 is provided with the hot air guide branch pipe 8, and is connected with the preheating interval 11 through the first fan 46, so that the discharged hot air in the recovery part cooling interval 13 is directly injected into the preheating interval 11, so that the glass entering the preheating interval 11 is preheated first, the initial temperature of the glass is improved, the heating uniformity is improved, and a large amount of energy is saved while the quality of the glass is improved. Preferably, the hot air diversion branch pipe 8 introduces 80% -90% of discharged hot air in the cooling zone 13 and injects the hot air into the preheating zone 11 from the upper part. The hot flue gas discharged from the preheating zone 11 is connected with the air inlet of the second heat exchanger 32 through the second fan 43, and the air outlet of the second heat exchanger 32 is connected with the first air inlet of the third heat exchanger 33 through a pipeline, and then discharged through a chimney. The water tank 9 is connected with a water inlet of the second heat exchanger 32 through a water pump 47 by a pipeline, a water outlet of the second heat exchanger 32 is connected with a water inlet of the steam generator 5, a steam outlet of the steam generator 5 is connected with an inlet of the screw generator 6, and an outlet of the screw generator 6 is connected with the water tank 9 through a return pipeline 7. After heat exchange is carried out on a medium (preferably water) in the water tank 9 through the second heat exchanger 32, the medium is heated to about 150 ℃, steam at about 380 ℃ is generated after passing through the steam generator 5, the steam pushes the screw generator 6 to do work through the screw generator 6 to generate power, and then the steam is condensed to form water which flows back to the water tank 9, so that a closed power generation cycle is formed. The water replenishing branch is connected with the water tank 9 after being heated by the third heat exchanger 33 and is used for replenishing water lost in the cyclic power generation of the water tank 9.

The exhaust pipe of the heating area 12 is connected with the air inlet of the first heat exchanger 31, the air outlet of the first heat exchanger 31 is connected with the air inlet of the steam generator 5 through the third fan 41, and the air outlet of the steam generator 5 is connected with the second air inlet of the third heat exchanger 33 and then exhausted through a chimney. The exhaust flue gas of the heating section 12 has high temperature of 500 ℃ after heat exchange through the first heat exchanger 31, the preheated water is heated through the steam generator 5 to form high-temperature steam, and then the high-temperature steam is exhausted through the chimney after heat exchange through the third heat exchanger 33, so that the exhaust heat of the heating section 12 can be effectively recovered and comprehensively utilized.

A temperature adjusting pipeline 2 is arranged and is connected with an air equalizing pipe 1 on the heating area 12 after passing through the first heat exchanger 31 under the action of a fourth fan 42, hot air is sprayed into the heating area 12 at a high speed of 30-50m/s, air flow in the heating area is stirred, heat generated by an electric heater (not shown) arranged in the heating area is forcibly transferred to toughened glass, meanwhile, the temperature of the heating area 12 is adjusted to keep the temperature of the heating area uniform from top to bottom, and air leaked from the heating area 12 through a partition plate and entering the cooling area 13 and the preheating area 11 is supplemented. Preferably, the fourth blower 42 is a roots blower.

The heating region is divided into a front section and a rear section, and temperature measuring devices are respectively arranged on the front section and the rear section. The air equalizing pipe consists of two groups of front section parts and rear section parts, a control valve is arranged on a main pipe of each group, and the hot air flow of the air equalizing pipe is automatically adjusted according to the temperature fed back by the temperature measuring device of the front section or the rear section so as to ensure that the temperature of the front section and the rear section is maintained at a set constant value.

Wherein, a plurality of air outlet holes are arranged on the air equalizing pipe 1, and the air outlet holes are directly 4 mm; the air equalizing pipe is arranged above the roller way and is 100-160 mm away from the surface of the toughened glass.

The electric power output end of the screw generator 6 is connected with the first fan, the second fan, the third fan, the fourth fan, the fifth fan, the control valve and the like through electric wires and used for providing a power supply required by operation, and the screw generator is self-used after power generation and can effectively save energy.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.