CN207515508U - An energy-saving kiln capable of continuously firing blue bricks and blue tiles - Google Patents

Abstract

An energy-saving kiln capable of continuously firing green bricks and green tiles, the kiln is composed of a preheating section, a firing section, and a reduction water-cooling section. Each section is separated by a movable door, and the front end of the preheating section and the rear end of the reduction water-cooling section are closed by a closed door. The firing section includes a firing burner, a firing air intake branch pipe and a firing air intake pipe, and the firing section is provided with a smoking port. The preheating section includes a preheating section smoke pipe and a preheating section main flue, and the furnace chamber of the preheating section is provided with a flame outlet, and the firing section main flue is connected to the preheating section flame outlet; the reduction burner is connected to the reduction air intake pipe through a valve and a reduction air intake branch pipe, and the excess reduction gas enters the firing section through a gas collecting hopper and a gas collecting pipeline for full combustion. The high-temperature flue gas in the firing section and the preheating section of the utility model is fully heat-exchanged with the product and then discharged from the kiln body, thereby ensuring that the heat carried away by the flue gas is at the lowest level. In addition, the excess reduction gas in the water-cooled reduction section is collected by the gas collecting hopper and enters the firing section from the gas collecting pipeline for combustion, thereby reducing energy consumption and avoiding environmental pollution.

Description

An energy-saving kiln capable of continuously firing blue bricks and blue tiles

technical field

The utility model relates to an industrial kiln, in particular to an energy-saving kiln capable of continuously firing green bricks and blue tiles.

Background technique

With the improvement of living standards, the market's demand for building materials for antique buildings is increasing, and blue bricks and blue tiles are a kind of building materials widely used in antique building materials. Ordinary clay bricks are fired due to oxidation, and the iron in the form of ferrous oxide is red after firing, but if the ferrous oxide is reduced during the firing process, the iron element is not completely oxidized to ferrous iron, and it will be blue-gray , but the reduction in the firing process and the anaerobic cooling at 500-1000 °C are particularly demanding, and the control is not good, the color difference is large, the energy consumption is high, and the yield is low.

At present, due to environmental protection requirements, most blue brick and blue tile manufacturers use natural gas as fuel for shuttle kiln, split tunnel kiln, and roller kiln for production. Due to the high temperature of the flue gas discharged during the production process and the low energy utilization, the shuttle kiln consumes a lot of energy, and the excess reducing gas is discharged to pollute the environment. The production method of installing one kiln and one kiln can only be used for intermittent production, so the output is low. Although the split-type tunnel kiln can be used for continuous production, the temperature of the product decreases during the transfer to the reduction kiln, which causes the product to crack and needs to be reheated before reduction after reaching the reduction kiln. The process is complicated and requires more labor and energy consumption. It is not low, and the yield rate cannot be guaranteed. Although the roller kiln can be used for continuous production and low energy consumption, due to the limitations of the running speed, load-bearing capacity and space size of the rollers, it is powerless to produce large products and requires a large investment. Small and medium-sized manufacturers are unable to choose. Furnace improvements.

Utility model content

Based on this, it is necessary to address the deficiencies in the prior art and provide an energy-saving kiln capable of continuously firing green bricks and green tiles.

The technical scheme of the utility model is:

An energy-saving kiln capable of continuously firing green bricks and blue tiles. The kiln includes a preheating section, a firing section, and a reducing water cooling section. Rails are laid in the overall kiln. The firing section includes a furnace chamber, a firing burner, a firing intake branch pipe and a firing intake pipe. The firing burners are divided into two rows and arranged on the side wall of the furnace chamber. The firing burner is connected to the firing intake pipe through the firing intake branch pipe; the furnace chamber of the firing section is provided with a smoking port below the kiln car table, and the preheating section includes the furnace chamber, the branch pipe of the preheating section and the The main flue of the preheating section, the furnace chamber of the preheating section is equipped with a flame vent, the smoking port of the firing section is connected to the main flue of the firing section through the branch flue of the firing section, and the main flue of the firing section is connected to the main flue of the preheating section The flame outlet connection; the reduction water cooling section includes reduction burners, valves, reduction intake branch pipes, reduction intake pipes, gas collecting buckets, drip pipes and drip valves. The reduction burners are symmetrically distributed on both sides near the kiln car table. The nozzle is connected to the reduction inlet pipe through the valve and the reduction air intake branch pipe. The excess reduction gas enters the firing section through the gas collecting bucket and the gas collecting pipe and is fully burned. There are two rows of evenly distributed drip pipes outside the kiln roof of the reduction water cooling section. Connect to the water inlet pipe through the drip valve.

Preferably, the furnace chamber of the preheating section is provided with a preheating section smoking port near the kiln car table, and the preheating section also includes a preheating section branch flue, a preheating section main flue, a smoke air duct and The smoking fan, the smoking port of the preheating section is connected with the main flue of the preheating section through the branch flue, and the main flue of the preheating section is connected with the smoking fan through the smoking duct.

Preferably, the firing section branch flue and the firing section main flue are arranged in the kiln wall of the side wall of the firing section, and a kiln car flue gas channel is also provided in the kiln, and the smoking port of the firing section It is connected with the branch flue of the firing section and the flue gas channel of the kiln car; the smoking port of the preheating section, the branch flue of the preheating section and the main flue of the preheating section are arranged in the side wall of the kiln wall of the preheating section, The smoking port of the preheating section is connected with the branch flue of the preheating section and the flue gas passage of the kiln car.

Preferably, it also includes a first closed door, a second closed door, a third closed door, a fourth closed door and a driving module, the first closed door is arranged at the inlet end of the preheating section, and the second closed door Set between the preheating section and the firing section, the third closed door is set between the firing section and the reducing water cooling section, the fourth closing door is set at the outlet end of the reducing water cooling section, the driving module Drive the first closed door, the second closed door, the third closed door, and the fourth closed door to move up and down, and adjust the sealing state of the preheating section, firing section and restoring water cooling section.

The beneficial feature of the utility model is that the firing section adopts high-temperature jet burners to fully stir the airflow in the kiln, and the smoking port of the firing section is located at the lower part of the kiln car table, and the temperature of the firing section is uniform by using the vertical air flow law, and the temperature difference between the upper and lower sides is less than 5°C. Afterwards, the high-temperature flue gas enters the main flue of the firing section through the branch smoke port and enters the flame nozzle of the preheating section to be sprayed out. The products in the preheating section are fully exchanged for heat and then distributed to the smoking port at the lower part of the kiln car table from the preheating section. It flows into the main flue of the preheating section and is discharged into other equipment through the exhaust fan. This ensures that the heat taken away by the flue gas is at the lowest level, and the energy consumption is further reduced. During this process, the closed kiln doors at the front end of the preheating section and the back end of the reduction water cooling section are in a closed state, and the movable doors between each section are also in a closed state to ensure the absolute sealing of the reduction water cooling section, and ensure the reduction and safety of the reduction water cooling section. Oxygen water cooling is carried out smoothly. The excess reducing gas is collected by the gas collecting hopper and enters the burning section through the gas collecting pipe for combustion, reducing energy consumption and avoiding environmental pollution.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a top view of the kiln shown in Fig. 1 .

Fig. 3 is a sectional view of the kiln shown in Fig. 2 along line A-A.

Reference signs:

1. Preheating section; 2. Firing section; 3. Reduction water cooling section; 4. Front closed door of preheating section; 5. Reducing water cooling section rear closed door; 6. Preheating section and firing section movable door; 7. , the movable door of the firing section and the reduction water-cooling section; 8, the rail; 9, the firing intake pipe; 10, the reduction intake pipe; 11, the firing intake branch pipe; 12, the valve; 13, the firing burner; 14, the reduction Intake branch pipe; 15. Reduction burner; 16. Smoke fan; 17. Smoke duct; 18. Water inlet pipe; 19. Drip pipe; 20. Drip valve; 24. The smoking port of the preheating section; 25. The main flue of the preheating section; 26. The smoking port of the firing section; 27. The branch flue of the firing section; 28. The main smoke port of the firing section.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, not to limit the utility model.

As shown in Fig. 1, Fig. 2 and Fig. 3, the utility model provides an energy-saving kiln capable of continuously firing green bricks and blue tiles. Rails 8 are laid in the overall kiln, and the firing section 2 includes a furnace chamber, a firing burner 13, a firing intake branch pipe 11, a firing intake pipe 9, a firing section branch flue 27 and a firing section main pipe. Flue 28, the burning burners 13 are divided into upper and lower two rows and arranged on the side wall of the furnace chamber, the burning burners 13 are connected with the burning air intake pipe 9 through the burning air intake branch pipe 11; the furnace of the firing section 2 The chamber is provided with a smoking port 26 below the kiln car table. The preheating section 1 includes a furnace chamber, and the furnace chamber of the preheating section 1 is provided with a flame nozzle 23. Road 27 is connected to the main flue 28 of the firing section, and the main flue 28 of the firing section is connected to the flame nozzle 23 of the preheating section; the furnace chamber of the preheating section 1 is provided with a smoking port 24 of the preheating section near the kiln car table. The preheating section 1 also includes a preheating section branch flue, a preheating section main flue 25, a smoking air duct 17 and a smoking fan 16, and the smoking port of the preheating section 1 passes through the branch flue and the preheating section main flue. 25 connection, the main flue 25 of the preheating section is connected with the exhaust fan 16 through the exhaust air pipe 17; Drip pipe 19 and drip valve 20, reduction burners 15 are symmetrically distributed on both sides near the kiln car platform, reduction burners 15 are connected to reduction intake pipe 10 through valve 12 and reduction intake branch pipe 14, excess reduction gas passes through the gas collecting hopper 21 and the gas-collecting pipeline 22 enter the firing section 2 for full combustion, and two rows of evenly distributed drip pipes 19 are arranged outside the kiln roof of the reduction water cooling section 3, and the drip pipes 19 are connected with the water inlet pipe 18 through the drip valve 20.

The firing section branch flue 27 and the firing section main flue 28 are arranged in the kiln wall of the side wall of the firing section 2, and the kiln car flue gas channel is also provided in the kiln, and the firing section 2 The smoking port 26 of the firing section is connected with the branch flue 27 of the firing section and the kiln car flue gas passage; the branch flue of the preheating section and the main flue 25 of the preheating section are arranged in the side wall kiln wall of the preheating section 1 , the smoking port 24 of the preheating section is connected with the branch flue 24 of the preheating section and the flue gas channel of the kiln car.

The utility model also includes a first closed door 4, a second closed door 6, a third closed door 7, a fourth closed door 5 and a drive module (not shown), the first closed door 4 is located in the preheating section 1, the second closed door 6 is set between the preheating section 1 and the firing section 2, the third closed door 7 is set between the firing section 2 and the reducing water cooling section 3, and the first The four closed doors 5 are located at the outlet of the reduction water-cooling section 3, and the driving module drives the first closed door 4, the second closed door 6, the third closed door 7, and the fourth closed door 5 to move up and down to adjust the preheating section 1. The sealing state of firing section 2 and reduction water cooling section 3.

Working principle: before entering the car, open the closed kiln doors 4, 5 and movable kiln doors 6, 7, push the kiln car into the preheating section 1 through special equipment, and push the products on the kiln car into the preheating section 1 in turn, Segment 2 and reduction water cooling section 3 are processed. During processing, the kiln doors 4 and 5 are closed and the kiln doors 6 and 7 are movable, so that the preheating section 1, the firing section 2 and the reducing water cooling section 3 are processed independently of each other, and the entire kiln can be processed continuously. The firing section 2 raises the temperature in the firing section through the firing burner 13, and the high-temperature flue gas generated in the firing section 2 enters the main flue 28 through the smoking port 26 of the firing section 2, and is sprayed by the preheating section 1. The burner 23 enters the preheating section 1 to preheat the product. The reduction burner 15 in the reduction water cooling section 3 reduces the products entering the reduction water cooling section 3, and the excess reducing gas enters the firing section 2 through the gas collecting bucket 21 and the gas collecting pipe 22 for complete combustion. After the reduction water cooling section 3 completes the reduction, the valve 12 is closed to control the closing of the reduction burner 15 . Open the drip valve 20 to water-cool the product through the drip tube 19, control the dripping amount of the drip tube 19 through the drip valve 20 to control the cooling rate, and the reduction water cooling ends at 400°C, and finally obtain qualified blue bricks and blue tiles. This process goes round and round for continuous production.

The above-mentioned embodiments only express several implementation modes of the utility model, and the description thereof is relatively specific and detailed, but it should not be understood as limiting the scope of the utility model patent. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the scope of protection of a utility model patent should be determined by the appended claims.

Claims (4)

1. it is a kind of can continuous firing blue bricks grey tile energy saving kiln, kiln includes preheating section, is burnt into section, restores water cooling section, whole Rail is laid in kiln, which is characterized in that the firing section includes furnace chamber, firing burner, firing air intake branch, firing air inlet Pipe, firing section branch flue and firing section flue collector, the firing section branch flue are connect with firing section flue collector, the firing burner It is divided into two rows to be located on the side wall of furnace chamber, firing burner is connect by being burnt into air intake branch with firing air inlet pipe, is burnt into the stove of section Room is equipped with smoking port in kiln vehicle surface lower position；The preheating section includes furnace chamber, and the furnace chamber of preheating section is equipped with bocca, firing The smoking port of section is connect by being burnt into section branch flue with firing section flue collector, and firing section flue collector is connect with preheating section bocca； It restores water cooling section and includes reduction burner, valve, reduction air intake branch, reduction air inlet pipe, gas collection bucket, weep pipe and the valve that drips, Reduction burner is symmetrically distributed in nearly kiln vehicle surface both sides external, and reduction burner passes through valve and reduction air intake branch and reduction air inlet Pipe connects, and extra reducing gas enters firing section by gas collection bucket and collecting pipe and fully burns, outside reduction water cooling section kiln top Portion sets two rows of equally distributed weep pipes, and weep pipe is connect by the valve that drips with water inlet pipe.

2. it is as described in claim 1 it is a kind of can continuous firing blue bricks grey tile energy saving kiln, it is characterised in that：The preheating section Furnace chamber be equipped with preheating section smoking port close to the position of kiln vehicle surface, the preheating section further includes preheating section branch flue, preheating section Flue collector, smoking air hose and smoking wind turbine, the branch flue are connect with preheating section flue collector, and the preheating section smoking port passes through branch Flue is connect with preheating section flue collector, and preheating section flue collector is connect by smoking air hose with smoking wind turbine.

3. it is as claimed in claim 2 it is a kind of can continuous firing blue bricks grey tile energy saving kiln, it is characterised in that：The firing section The kiln that branch flue, firing section flue collector are set on the firing section side wall is additionally provided with kiln car exhaust gases passes, the burning within the walls, in kiln Smoking port into section is connect with firing section branch flue, kiln car exhaust gases passes；The preheating section branch flue and preheating section flue collector are set In the preheating section side wall kiln within the walls, the preheating section smoking port is connect with preheating section branch flue and kiln car exhaust gases passes.

4. it is as described in claim 1 it is a kind of can continuous firing blue bricks grey tile energy saving kiln, it is characterised in that：Further include first Closing door, the second closing door, third closing door, the 4th closing door and driving module, first closing door are set on preheating section Arrival end, second closing door are set between preheating section and firing section, and the third closing door is set on firing section and reductive water Between cold section, the 4th closing door is set on the port of export of reduction water cooling section, and the driving module drives the first closing door, second Closing door, third closing door, the 4th closing door move up and down, adjustment preheating section, firing section and the sealing state for restoring water cooling section.