CN201301270Y - A heat-accumulating type glass crucible circular kiln - Google Patents

Abstract

The utility model proposes a heat storage type glass crucible round kiln, which includes a glass crucible round kiln, and a pair of air heat storage boxes are arranged at the bottom of the heat storage box. The top opening of the heat storage box is a high-temperature working end, and the lower part is a cold air inlet or Low-temperature flue gas outlet; according to the shape of the top outlet of the air heat storage box, a ""-shaped connecting channel is built to connect it with the semi-circular channel at the lower part of the spout brick, and a boss is built at the connection. Each heat storage box It is connected with a semi-annular channel, and the connection is in the middle of the semi-annular channel; the glass crucible round kiln adopts multiple spouts for decentralized heat supply, and the spout bricks are provided with gas channels and air or flue gas channels, and fuel and high-temperature air pass through the spout bricks After being supplied from the gap between the two crucibles, they will meet and burn in the circular kiln. The utility model adopts the regenerative combustion technology, the temperature is convenient to control, the temperature in the kiln is uniform, the thermal efficiency is high, the fuel is fully burned, the formation of NOx is suppressed, and zero pollution is basically realized.

Description

Regenerative glass crucible round kiln

technical field

The utility model relates to a glass melting device, in particular to a heat storage type glass crucible circular kiln.

Background technique

At present, the general glass crucible round kiln is supplied with low calorific value gas from the center of the kiln bottom, and the combustion-supporting air is preheated by the checker brick preheater at the bottom of the kiln and then supplied into the kiln along with the gas. The crucible is radially arranged around the flame outlet, and the kiln body has no heat preservation measures. This type of circular kiln generally has disadvantages such as high exhaust gas temperature, low thermal efficiency, harsh working environment, and serious air pollution. If high calorific value gas is used as fuel, local high temperature will appear in the kiln, which seriously affects the service life of the kiln body. Since the 1990s, regenerative combustion technology has been widely used in metallurgy, cement, glass, ceramics and other industries. The emergence of this technology has brought revolutionary development to the traditional energy utilization industry and combustion itself. However, in the glass crucible There is still a blank space on the round kiln.

Contents of the invention

Aiming at the above-mentioned unfavorable current situation commonly existing in the existing glass crucible round kiln, the utility model provides a regenerative glass crucible round kiln to solve the problem of effective utilization of high calorific value clean gas in the glass crucible round kiln.

形连接通道，使其与喷口砖下部半环形通道相连，并在连接处砌出凸台，每个空气蓄热箱体与一个半环形通道相连，连接处在半环形通道的中间位置；所述玻璃坩埚圆窑采用多个喷口分散供热，喷口砖内设置有燃气通道和空气或烟气通道，燃料和高温空气通过喷口砖从两坩埚间空隙供入后，在圆窑内交汇燃烧。The technical scheme of the utility model is to design a heat storage type glass crucible round kiln, including a glass crucible round kiln, a pair of air heat storage boxes are arranged at the bottom of the glass crucible round kiln, and the top of the air heat storage box is open It is the high-temperature working end, and the lower part is the cold air inlet or the low-temperature flue gas outlet; according to the shape of the outlet on the top of the air heat storage box, a

Shaped connecting channel, so that it is connected with the semi-circular channel at the lower part of the spout brick, and a boss is built at the connection. Each air heat storage box is connected with a semi-circular channel, and the connection is in the middle of the semi-circular channel; The glass crucible round kiln adopts multiple spouts for decentralized heat supply. There are gas channels and air or flue gas channels in the spout bricks. After the fuel and high-temperature air are supplied from the gap between the two crucibles through the spout bricks, they converge and burn in the circular kiln.

In the above solution, the air heat storage box adopts a vertical structure and is symmetrically arranged at the lower side of the glass crucible circular kiln.

In the above solution, ceramic balls are used as heat storage bodies in the air heat storage box.

In the above solution, a liquid accumulation tank is arranged at the bottom center of the glass crucible round kiln, and the glass liquid flowing out due to the breakage of the crucible is regularly replaced and cleaned.

In the above solution, the spout brick is prefabricated with corundum castable.

In the above scheme, the surface of the kiln bottom crucible is a plane, and from the tail of the crucible to the position of the liquid accumulation port in the center of the circular kiln, the kiln bottom is gradually concave, so that the glass liquid can effectively flow into the liquid accumulation tank.

In the above solution, the spout bricks of the crucible are evenly distributed on the circumference.

In the above solution, there are 2-10 spout bricks corresponding to each semi-annular channel.

In the above scheme, the gas can be sent directly into the gas channel of the spout brick through the heat-resistant metal pipe through the wall, and the high-temperature air enters the spout brick through the hole reserved in the upper part of the semi-circular channel, and then enters the circular kiln to mix with the gas and Stable combustion.

The regenerative glass crucible round kiln of the utility model skillfully adopts the regenerative combustion technology, which has the advantages of convenient temperature control, uniform temperature in the kiln, high thermal efficiency, sufficient fuel combustion, suppressed formation of NOx, and greatly reduced emissions. It not only improves the energy utilization rate, but also greatly reduces the labor intensity of the operators, improves the working environment, and basically realizes zero pollution.

Description of drawings

Fig. 1 is the structural representation of regenerative glass crucible round kiln;

Fig. 2 is A-A sectional view among Fig. 1;

Fig. 3 is B-B sectional view among Fig. 1;

Fig. 4 is a sectional view of C-C in Fig. 3 .

Detailed ways

With reference to Fig. 1 to Fig. 4, now take the regenerative glass crucible round kiln for heating 10 crucibles as an example, to illustrate the utility model in detail.

The heat storage type glass crucible round kiln of the present utility model includes a glass crucible round kiln, the outer shape of the round kiln masonry is maintained by the steel structure 1, the tightness of the masonry is maintained, and the horizontal thrust of the kiln roof acting on the wall; The body refractory lining 2 forms a combustion space with a fixed volume, and plays the role of fire resistance and heat preservation; gas and preheated high-temperature air enter the kiln through the spout brick 3, and the spout brick is built in the wall.

形连接通道，使其与喷口砖下部环形通道相连，并在连接处砌出凸台7。多个燃气喷口对称分成两组，喷口砖下部是一个环形通道，通道内设置隔墙，将其等分为2个半环形通道5。每组喷口砖下部都是一条半环形通道，分别与2个空气蓄热箱体4顶部出口相连，形成一个蓄热箱体4为多个喷口砖提供高温预热空气的结构形式。供热采用了小孔径、多喷口形式，有利于燃料完全燃烧和温度均匀，压力可相对稳定。玻璃坩埚圆窑上每个半环形通道5上面对应5个喷口砖3，喷口砖3在圆周上均布；喷口砖3内设置有燃气通道8和空气(烟气)通道9，燃料和高温空气通过喷口砖从两坩埚间空隙供入后，在圆窑内交汇燃烧。The improvement of the utility model is that a pair of air heat storage boxes 4 are symmetrically installed on the bottom of the glass crucible round kiln. Air inlet or low-temperature flue gas outlet; according to the shape of the outlet on the top of the air heat storage box, a

Shaped connection channel, it is connected with the annular channel of spout brick bottom, and builds boss 7 at the junction. A plurality of gas nozzles are symmetrically divided into two groups, and the lower part of the nozzle brick is an annular passage, and a partition wall is arranged in the passage, which is equally divided into two semi-annular passages 5 . The lower part of each group of spout bricks is a semi-circular channel, which is respectively connected to the top outlets of two air heat storage boxes 4, forming a structural form in which one heat storage box 4 provides high-temperature preheated air for multiple spout bricks. The heat supply adopts the form of small aperture and multiple nozzles, which is conducive to the complete combustion of fuel and uniform temperature, and the pressure can be relatively stable. Each semi-annular channel 5 on the glass crucible round kiln corresponds to five spout bricks 3, and the spout bricks 3 are evenly distributed on the circumference; the spout bricks 3 are provided with gas channels 8 and air (flue gas) channels 9, fuel and high-temperature air After being supplied from the gap between the two crucibles through the spout brick, they are converging and combusted in the circular kiln.

In the heat storage box 4, ceramic pellets are used as the heat storage body. The air pipeline adopts a rotary four-way reversing valve, and the gas pipeline adopts two quick cut-off valves to realize the combustion reversing function. The reversing period is about 3 minutes, the air preheating temperature can reach above 1200°C, and the exhaust gas temperature drops to about 150°C.

The gas can be sent directly into the gas channel of the spout brick 3 through the heat-resistant metal pipe through the wall, and the high-temperature air enters the spout brick through the circular hole reserved in the upper part of the semi-circular channel, and then enters the circular kiln to mix with the gas and stabilize it. combustion.

The bottom center of the glass crucible round kiln is provided with a liquid accumulation tank 6, so that the glass liquid flowing out due to the breakage of the crucible is regularly replaced and cleaned. The surface of the kiln bottom where the crucible is located is a plane. From the tail of the crucible to the position of the liquid accumulation port in the center of the circular kiln, the bottom of the kiln is gradually concave, so that the glass liquid can effectively flow into the liquid accumulation tank.

The spout brick 3 can be prefabricated with a corundum castable to enhance its service life.

The number of spout bricks is the same as the number of crucibles, generally 8, 10 or 12 per circle.

The kiln roof and side walls of the glass crucible round kiln adopt composite masonry structure. Among them, the roof of the round kiln is built with silica bricks as the refractory layer, and sepiolite is added for insulation; the side wall of the round kiln is built with high-alumina bricks as the refractory layer. Felt heat insulation; for the masonry of the round kiln bottom, except for the high-alumina bricks around the annular channel connected to the outlet on the top of the heat storage box and the liquid outlet in the center of the kiln bottom, the rest of the kiln bottom masonry materials are from top to bottom. Corundum castables, high alumina bricks, refractory clay bricks, lightweight thermal insulation clay bricks, asbestos-free hard calcium silicate boards, and a layer of fiber felt is laid on the bottom steel plate of the kiln bottom. This structure can effectively reduce the surface temperature of the kiln body, ensure its airtightness, reduce heat loss and prolong its service life.

The working principle of the utility model is: at the first moment, as shown in Figure 4, the cold air enters from the lower part of the left box, exchanges heat with the ceramic balls in the box, and becomes high-temperature air, and the high-temperature air enters the left side from the top outlet of the box. The semi-annular passage passes through the air nozzle of the spout brick from the semi-annular passage, and enters the circular kiln for combustion together with the gas entering from the gas nozzle of the spout brick. The high-temperature flue gas after combustion enters the semi-circular channel under the spout brick through the air nozzles of the spout bricks on the right, and then enters the tank from the top opening of the right heat storage box to exchange heat with the ceramic balls, and the temperature of the flue gas decreases rapidly. , the low-temperature flue gas is discharged through the lower outlet of the box. After a reversing cycle, the gas supply on the left side stops, the cold air inlet of the left heat storage box becomes the low-temperature flue gas outlet, and the air nozzle of the left nozzle brick becomes the high-temperature flue gas inlet; The low-temperature flue gas outlet turns into a cold air inlet, and the flue gas inlet of the nozzle brick on the right side becomes a high-temperature air nozzle, and gas is supplied to the right side at the same time. Such periodic changes. A pair of heat storage boxes stably feed high-temperature air into the circular kiln with gas combustion, and at the same time stably discharge low-temperature flue gas.

Claims (10)

1, a kind of thermal storage type glass crucible circular kiln, comprise the glass pot circular kiln, it is characterized in that the bottom of glass pot circular kiln is provided with a pair of air accumulation of heat casing, the open top of described air accumulation of heat casing is the hot operation end, and the bottom is cool air inlet or low-temperature flue gas outlet; Build one by laying bricks or stones according to air accumulation of heat casing top exit profile

The shape connecting passage makes it link to each other with the semi-circular passage in spout brick bottom, and builds out boss in the junction, and each air accumulation of heat casing links to each other with a semi-circular passage, and the junction is in the mid-way of semi-circular passage; Described glass pot circular kiln adopts a plurality of spout disperseds supply of heating, is provided with blast tube and air or exhaust gases passes in the spout brick, and after fuel and high temperature air infeeded from space between two crucibles by the spout brick, burning crossed in circular kiln.

2, thermal storage type glass crucible circular kiln according to claim 1 is characterized in that, described air accumulation of heat casing adopts vertical structure, is symmetricly set on the side lower part of glass pot circular kiln.

3, thermal storage type glass crucible circular kiln according to claim 1 is characterized in that, is heat storage with the ceramic bead in the described air accumulation of heat casing.

4, thermal storage type glass crucible circular kiln according to claim 1 is characterized in that the bottom centre of described glass pot circular kiln is provided with the hydrops jar.

5, thermal storage type glass crucible circular kiln according to claim 1 is characterized in that, described spout brick adopts corundum pouring material, and is pre-formed.

6, thermal storage type glass crucible circular kiln according to claim 1 is characterized in that, crucible place face is a plane at the bottom of the described kiln, and is to hydrops mouth position, circular kiln center, recessed gradually at the bottom of the kiln from the crucible afterbody.

7, thermal storage type glass crucible circular kiln according to claim 1 is characterized in that, described crucible spout brick is uniform on circumference.

8, according to arbitrary described thermal storage type glass crucible circular kiln among the claim 1-7, it is characterized in that described each corresponding 2-10 spout brick above the semi-circular passage.

9, thermal storage type glass crucible circular kiln according to claim 8 is characterized in that, combustion gas can directly be sent into the blast tube of spout brick by body of wall with the heating resisting metal pipe, and the hole of reserving when high temperature air is then built by laying bricks or stones by semi-circular passage top enters the spout brick.

10, thermal storage type glass crucible circular kiln according to claim 8 is characterized in that, the kiln top and the side wall of described glass pot circular kiln all adopt compound masonry structure; Wherein the circular kiln top is built by laying bricks or stones and is adopted silica brick to do flame retardant coating, adds the sepiolite insulation; The circular kiln side wall is built by laying bricks or stones and is adopted high alumina brick to do flame retardant coating, and the middle layer is the soft clay insulating brick, and it is heat insulation with fire-retardent fiber felt-rug that skin is close to steel plate.

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