CN110701919A

CN110701919A - Longjiao tail gas processing apparatus

Info

Publication number: CN110701919A
Application number: CN201910933123.3A
Authority: CN
Inventors: 李庆德; 刘亚东; 郭文静; 谢萍; 桑同慧
Original assignee: Foshan University
Current assignee: Foshan University
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-01-17

Abstract

The invention discloses a dragon kiln tail gas treatment device which comprises a heat exchange mechanism and a sewage discharge mechanism, wherein the heat exchange mechanism comprises a water tank and a coiled pipe positioned in the water tank, the sewage discharge mechanism comprises an intersection chamber, the inlet end of the coiled pipe is communicated with a waste gas outlet of a dragon kiln through a pipeline, the water tank is provided with a water pipe inlet and a steam outlet, the outlet end of the coiled pipe is converged with the steam outlet of the water tank in the intersection chamber through a pipeline, and the upper part of the intersection chamber is provided with a cooling waste gas outlet. This technical scheme utilizes coiled pipe and water tank to carry out the heat transfer for the tail gas temperature reduces by a wide margin. Simultaneously, because the moisture in the water tank is heated and boils, join its vapor that produces and the tail gas after the heat transfer, make vapor can use the ashes in the tail gas to condense as the condensation nucleus to assemble into the condensate that has the plant ash and fall, reduce the content of particulate matter in the tail gas by a wide margin. Achieves two purposes by one stroke, and realizes the aim of reducing the temperature and the ash content of the tail gas of the dragon kiln.

Description

Longjiao tail gas processing apparatus

Technical Field

The invention relates to the technical field of ceramic equipment, in particular to a dragon kiln tail gas treatment device.

Background

The history of ceramic manufacture in China has been thousands of years, and the inheritance and development of the generations also make the requirements of people on the quality of ceramics higher and higher. The firewood burning is an ancient firing method, and the firewood burning refers to ceramic products which are fired by using firewood as fuel, and mainly comprises two categories of glazing (ground glaze) and non-glazing (natural glaze); the final firing effect of the firewood firing pottery is determined by the interaction and mutual influence of factors such as soil, ash glaze (falling ash), duration (temperature), kiln atmosphere and kiln skill of a kiln operator. Therefore, the same pottery clay can be burnt in different kilns at the same temperature and by different woods and under the control of different people, and the burning effect is very different.

The difference between the pottery works fired by firewood and the ordinary kiln is that ash and flame directly enter the kiln to generate ash which is melted into natural ash glaze through high temperature, and the ash glaze has warm color, rich layers, rough and forceful texture and is different from the ordinary gorgeous and bright glaze chemicals; the results of kiln firing are not repeated and difficult to predict. If it is a horizontal flame kiln, the burnt product has the negative and positive change of fire receiving surface and back fire surface and flame trace. It gives out a simple, elegant and antique aesthetic feeling, which is the reason why the pottery artists in firewood have been pursuing for the pottery artists.

The color of the dragon kiln firewood burning can be represented only by pottery clay/ground glaze and ash glaze, the ash glaze is formed by naturally dropping the ash of the firewood ash on the surface of the pottery and melting the firewood ash at the temperature of about 1400 ℃, and the dragon kiln firewood burning is mainly formed by casting the grey similar to the glaze. Therefore, the dragon kiln uses a large amount of firewood in the firing process, and the generated smoke gas also contains a large amount of ash. Because the number of the existing dragon kilns which are also put into use is not large, a tail gas treatment device special for the dragon kilns is not provided, and waste gas treatment devices of other kilns are directly used. However, these existing exhaust gas treatment devices are difficult to adapt to the high temperature and high concentration of plant ash content of the dragon kiln, and are easy to destroy or block.

Disclosure of Invention

Because current exhaust gas treatment ware is difficult to adapt to the operational environment of dragon kiln high temperature, high ash content, this technical scheme aims at providing a dragon kiln tail gas processing apparatus, can effectively reduce dragon kiln tail gas temperature and ash content.

The utility model provides a dragon kiln tail gas processing apparatus, includes heat transfer mechanism and blowdown mechanism, heat transfer mechanism includes the water tank and is located the coiled pipe of water tank, blowdown mechanism is including the room that crosses, the entry end of coiled pipe passes through the exhaust outlet intercommunication of pipeline with the dragon kiln, the water tank is equipped with water pipe entry and steam outlet, the exit end of coiled pipe passes through the steam outlet of pipeline with the water tank and converges in the room that crosses, room upper portion that crosses is equipped with the cooling exhaust outlet.

Further, the water pipe inlet is provided with a first valve. The first valve is an electric flow valve, and a liquid level meter capable of adjusting the flow of the electric flow valve is arranged in the water tank.

Further, the bottom of the intersection chamber is provided with a waste liquid drainage port, and the waste liquid drainage port is provided with a second valve. The second valve is a waste valve.

Further, the water tank and the junction chamber are at the same height. The cooling exhaust gas outlet is positioned at the upper part of the junction chamber and extends upwards.

This technical scheme utilizes coiled pipe and water tank to carry out the heat transfer for the tail gas temperature reduces by a wide margin. Simultaneously, because the moisture in the water tank is heated and boils, join its vapor that produces and the tail gas after the heat transfer, make vapor can use the ashes in the tail gas to condense as the condensation nucleus to assemble into the condensate that has the plant ash and fall, reduce the content of particulate matter in the tail gas by a wide margin. Achieves two purposes by one stroke, and realizes the aim of reducing the temperature and the ash content of the tail gas of the dragon kiln.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.

FIG. 1 is a schematic view of the installation of a dragon kiln tail gas treatment device;

FIG. 2 is a schematic structural diagram of the dragon kiln tail gas treatment device in embodiment 1.

Detailed Description

Example 1: a dragon kiln tail gas treatment device 200 is shown in figure 1 and is arranged at the tail end of a dragon kiln 100 and communicated with the dragon kiln through a pipeline. This dragon kiln tail gas processing apparatus 200, including heat transfer mechanism and blowdown mechanism, heat transfer mechanism includes water tank 201 and the coiled pipe 203 that is located water tank 201, blowdown mechanism is including meeting room 208, the entry end 202 of coiled pipe 203 passes through the pipeline and communicates with the exhaust outlet of dragon kiln 100, water tank 201 is equipped with water pipe entry 205 and steam outlet 204, the exit end 206 of coiled pipe 203 passes through the pipeline and joins in meeting room 208 with the steam outlet 204 of water tank 201, meeting room 208 upper portion is equipped with cooling exhaust outlet 207. The tail gas discharged from the dragon kiln 100 enters the coiled pipe 203 from the inlet end 202 and exchanges heat with water in the water tank 201, and then is discharged from the outlet end 206, and is converged with water vapor discharged from the steam outlet 204 in the convergence chamber 208, most of ash of the tail gas is mixed with the water vapor to form condensation nuclei, and the condensation nuclei fall to the bottom of the convergence chamber 208. The harmfulness of the tail gas after heat exchange and condensation dedusting is greatly reduced, the tail gas can be discharged from a cooling waste gas outlet 207, and if the environmental protection requirement is not met, a conventional waste gas processor can be additionally arranged subsequently.

In a further preferred embodiment, the water inlet 205 is provided with a first valve, which can be opened and closed at appropriate time according to the evaporation amount of water in the water tank 201 to supplement water for heat exchange.

In a further preferred embodiment, the first valve is an electric flow valve, and a liquid level meter capable of adjusting the flow of the electric flow valve is arranged in the water tank 201, so that the liquid level can be automatically detected for water supplement. However, it should be noted that the liquid level meter is a high temperature resistant type, because the temperature of the exhaust gas of the dragon kiln 100 is high, so that the temperature of the water vapor in the water tank 201 is far higher than 100 ℃.

In a further preferred embodiment, a waste liquid drainage port 209 is formed at the bottom of the junction chamber 208, and a second valve is provided at the waste liquid drainage port 209. Normally, the second valve is closed to prevent the cooling waste gas from being discharged from the waste liquid drainage port 209; when the dirty liquid condensed with ash in the tail gas is accumulated to a certain amount, the second valve can be opened for emptying.

As a further preferred embodiment, the second valve is a waste valve. The heat exchange mechanism further comprises a waste liquid evaporation box, the bottom of the waste liquid evaporation box is a metal flat plate with a hole passage for air to pass through, an inlet of the waste liquid evaporation box is communicated with a waste liquid drainage port, an automatic scraper mechanism is arranged in the waste liquid evaporation box, a steam outlet is arranged on the upper portion of the waste liquid evaporation box, a powder outlet is arranged on the lower portion of the waste liquid evaporation box, and two ends of the hole passage of the metal flat plate are respectively communicated with an inlet end of a coiled pipe and a waste gas outlet of the dragon kiln.

In a further preferred embodiment, the water tank 201 is at the same height as the junction chamber 208, so as to avoid the water vapor discharged from the vapor outlet 204 from being excessively condensed before entering the junction chamber 208, thereby affecting the effect of adsorbing the ash in the tail gas later.

In a further preferred embodiment, the cooled exhaust gas outlet 207 is located at the upper part of the junction chamber 208 and extends upwards, so that a certain condensation backflow effect can be achieved, and the condensation and ash removal effects of water vapor are further enhanced.

Claims

1. The utility model provides a dragon kiln tail gas processing apparatus, its characterized in that, includes heat transfer mechanism and sewerage agencies, heat transfer mechanism includes the water tank and is located the coiled pipe of water tank, sewerage agencies is including the room that crosses, the entry end of coiled pipe passes through the exhaust outlet intercommunication of pipeline with the dragon kiln, the water tank is equipped with water pipe entry and steam outlet, the exit end of coiled pipe passes through the steam outlet of pipeline with the water tank and converges in the room that crosses, room upper portion that crosses is equipped with the cooling exhaust outlet.

2. The dragon kiln tail gas treatment device according to claim 1, wherein the water pipe inlet is provided with a first valve.

3. The dragon kiln tail gas treatment device according to claim 2, wherein the first valve is an electric flow valve, and a liquid level meter capable of adjusting the flow of the electric flow valve is arranged in the water tank.

4. The dragon kiln tail gas treatment device according to claim 1, wherein a dirty liquid drainage port is arranged at the bottom of the intersection chamber, and a second valve is arranged at the dirty liquid drainage port.

5. The dragon kiln tail gas treatment device according to claim 4, wherein the second valve is a blowdown valve.

6. The dragon kiln tail gas treatment device according to claim 5, wherein the heat exchange mechanism further comprises a waste liquid evaporation tank, the bottom of the waste liquid evaporation tank is a metal flat plate with a hole for air to pass through, an inlet of the waste liquid evaporation tank is communicated with a waste liquid drainage port, an automatic scraper mechanism is arranged in the waste liquid evaporation tank, a vapor outlet is arranged at the upper part of the waste liquid evaporation tank, a powder outlet is arranged at the lower part of the waste liquid evaporation tank, and two ends of the hole of the metal flat plate are respectively communicated with an inlet end of the serpentine pipe and a waste gas outlet of the dragon kiln.

7. The dragon kiln tail gas treatment device according to claim 1, wherein the water tank is at the same height as the junction chamber.

8. The dragon kiln tail gas treatment device according to claim 1, wherein the cooled exhaust gas outlet is located at an upper portion of the junction chamber and extends upward.