CN102778126B - One-time palletizing-burning tunnel kiln - Google Patents

Abstract

In the tunnel kiln of the present invention, the outer sides of the inner kiln walls on the left and right sides of the drying kiln are respectively provided with drying kiln air supply ducts, and several air supply ports are scattered on the inner kiln walls, and the air supply ports are connected to the inner cavity of the drying kiln and the drying oven. Kiln air supply channel, the top of the drying kiln is equipped with a tide outlet for discharging humid air; the outer sides of the inner kiln wall on the left and right sides of the roasting kiln are respectively equipped with roasting kiln exhaust ducts, and several air outlets are scattered on the inner kiln wall. The inner cavity of the roasting kiln is connected with the roasting kiln exhaust duct, and the air supply duct of the drying kiln is connected with the roasting kiln exhaust duct through a fan to extract the hot flue gas in the roasting kiln and send it to the drying kiln for drying and preheating the bricks. The beneficial effects of the present invention are that the structure is stable, durable and has good thermal insulation performance, which can produce energy-saving and high-efficiency brick and tile products, can greatly improve work efficiency, greatly improve the working environment of workers, and effectively use the heat extracted from the roasting kiln to act on the drying kiln to make the heat Effective utilization, low energy consumption, saving energy.

Description

One-time stack firing tunnel kiln

technical field

The invention belongs to thermal equipment suitable for continuous firing of bricks and tiles in the building material brick and tile industry, and relates to a tunnel kiln for one-time stack firing.

Background technique

 In the past, a wheel kiln was used to roast bricks and tiles. It was difficult to mechanize the process of kiln loading and kiln discharging, which required a large amount of labor. Workers operate in the dusty and high-temperature wheel kiln, and the working conditions are very poor. Existing tunnel kilns mostly use external metal air ducts, which are easily corroded by corrosive gases generated during the firing process, and the maintenance costs are high. Aiming at the current market situation, a new firing thermal equipment is needed.

Contents of the invention

In order to make up for the deficiencies of the prior art, the present invention provides a tunnel kiln with one-time stacking firing that is highly efficient, energy-saving, and improves the working environment of workers.

The present invention is achieved through the following technical solutions:

The one-time firing tunnel kiln of the present invention includes a drying kiln and a roasting kiln, and its special feature is that the drying kiln and the roasting kiln are arranged side by side; There are several air supply ports connected between the inner cavity of the kiln and the air supply channel of the drying kiln. There are steel rails for the kiln car to enter and exit under the inner cavity. The outer side of the kiln wall is respectively provided with a roasting kiln exhaust duct, and there are several air intakes connected between the inner cavity of the roasting kiln and the roasting kiln exhaust duct, and the air intake is provided with an adjustable damper for controlling the firing temperature curve. There are steel rails for the kiln car to enter and exit; the air supply duct of the drying kiln is connected with the exhaust duct of the roasting kiln through a fan, and the hot flue gas in the roasting kiln is drawn out and sent to the drying kiln to dry and preheat the bricks. the

In the tunnel kiln of the present invention, the bottom is a concrete foundation, the outermost layer of the drying kiln and the roasting kiln is an outer kiln wall, and there is an insulation layer inside the outer kiln wall. The kiln body is also equipped with an inner kiln wall. The mouth is set on the inner kiln wall, and the inner kiln wall is located on the left and right sides of the bottom of the kiln car. There are sand sealing grooves, which are filled with sand for cooling the kiln car. There are suspended ceiling refractory bricks on the inside, prefabricated panels on the outside of the top, and suspended ceiling I-beams between the prefabricated panels and the top refractory bricks.

The beneficial effect of the present invention is that the present invention is a highly mechanized roasting equipment with a stable and durable structure, good thermal insulation performance, energy-saving and high-efficiency production of brick and tile products, and can greatly improve work efficiency. The environment makes the brick and tile products easy to load, unload and transport; the heat extracted from the roasting kiln is effectively used to act on the drying kiln, so that the heat is effectively used, the energy consumption is low, energy is saved, and the output is large and the quality is high.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

In the figure, 1 insulation layer, 2 outer kiln wall, 3 concrete foundation, 4 drying kiln air supply duct, 5 inner kiln wall, 6 air supply outlet, 7 sand sealing groove, 8 kiln car, 9 steel rail, 10 roasting kiln exhaust duct, 11 wind gate, 12 suspended ceiling I-beam, 13 suspended ceiling refractory brick, 14 air outlet, 15 prefabricated panel, 16 coal injection port, 17 tidal discharge port.

Detailed ways

Accompanying drawing is a kind of specific embodiment of the present invention.

The one-time code firing tunnel kiln of the present invention comprises a drying kiln and a roasting kiln, and the drying kiln and the roasting kiln are arranged side by side; A number of air supply ports 6 are provided, and the air supply ports are connected to the inner chamber of the drying kiln and the air supply channel of the drying kiln. There are steel rails 9 for the kiln car 8 to enter and exit under the inner chamber, and a tide outlet 17 for discharging humid air is provided on the top of the drying kiln; The outer sides of the inner kiln wall on the left and right sides of the roasting kiln are respectively provided with a roasting kiln air exhaust duct 10, and the inner kiln wall is scattered with several air intakes 14, and the air intakes are connected to the inner cavity of the roaster kiln and the roaster kiln exhaust duct. The steel rail 9 for the kiln car 8 to enter and exit; the air supply duct of the drying kiln and the exhaust duct of the roasting kiln are connected by a fan, and the hot flue gas in the roasting kiln is extracted and sent to the drying kiln for drying and preheating the bricks. The air intake in the roasting kiln is provided with an adjustable air damper 11 for controlling the firing temperature curve.

In the tunnel kiln of the present invention, the air supply channel 4 of the built-in drying kiln and the exhaust channel 10 of the roasting kiln are arranged symmetrically;

In the tunnel kiln of the present invention, the bottom is a concrete foundation 3, the outermost layer of the drying kiln and roasting kiln is an outer kiln wall 2, an insulation layer 1 is arranged inside the outer kiln wall, and an inner kiln wall is also provided inside the kiln body. There are sand seal grooves 7 on the left and right sides of the bottom of the kiln car on the inner kiln wall. The sand seal grooves are filled with sand. The sand seal plates of the kiln car are inserted in the sand to isolate the temperature of the upper part of the kiln car. The temperature at the bottom of the kiln car is not high. , to avoid burning out the kiln car. The top of the roasting kiln is provided with a coal feeding port 16, the inner side of the top is provided with a suspended ceiling refractory brick 13, the outer side of the top is provided with a prefabricated panel 15, and a suspended ceiling I-beam 12 is provided between the prefabricated panel suspension and the top refractory brick.

The primary firing tunnel kiln of the present invention mainly includes an exhaust duct for extracting hot air (smoke) from the roasting kiln body, an air supply duct for supplying hot air to the drying kiln body, and a centrifugal variable frequency axial flow fan. The atmosphere in the kiln is well controlled by the function of the fan and the air duct. Use mechanical means to move the kiln car in the kiln to reduce the amount of manual labor. Being able to reuse the heat of fuel combustion reduces energy consumption.

Invention principle: The kiln body is divided into a roasting kiln body and a drying kiln body. The two kiln bodies are side by side and connected to the built-in air duct of the kiln body through a No. 20 frequency conversion centrifugal machine installed on the top of the kiln. The fan is arranged at the kiln inlet end of the roasting kiln, that is, the kiln outlet end of the drying kiln. Two air ducts and multiple air intakes are arranged symmetrically on both sides of the kiln wall in the interior of the roasting kiln, and a number of heat extraction air outlets are set in the preheating zone, and a number of waste heat exhaustion outlets and cold supply air outlets are set in the cooling zone. The atmosphere system, pressure system and temperature control degree in the roasting kiln are controlled through the opening and closing of these tuyere dampers. The firing curve can be controlled according to the adobe of different raw materials. The roof of the kiln is made of lightweight high-aluminum polyhydrogen refractory bricks, and the upper part of the refractory bricks is covered with refractory cotton of a certain thickness. Very good insulation. There is a coal feeding port on the top of the kiln.

The frequency conversion centrifugal fan installed on the top of the kiln extracts the hot flue gas from the roasting kiln and sends it to the air duct of the drying kiln. Several air outlets are set on both sides of the kiln wall in the drying kiln body according to the position of each kiln car. The purpose of drying is achieved by passing through the bricks from the bottom to the top, and the top of the drying kiln is also equipped with tide outlets according to the position of the kiln car to discharge the humid air out of the kiln.

With this embodiment

As shown in the figure, in the roasting kiln, the bricks carried by the kiln car 8 are burned in the roasting kiln, and the fan rotates to draw the hot flue gas to the roasting kiln exhaust duct 10 through the roasting kiln exhaust port 14, and the hot flue gas is transferred to the drying kiln by the fan The air supply channel 4 is blown to the wet bricks carried by the kiln car 8 through the drying kiln air supply port 6, and the moist air after drying the bricks is discharged to the outside of the kiln through the tide outlet 17, and the above process is repeated to continuously complete the burning of the bricks. system. The wind gate 11 cooperates with the centrifugal fan to adjust the air volume in the air duct to achieve the purpose of producing high-quality sintered bricks with high efficiency.

Claims (1)

1. an once-setting firing tunnel kiln, comprises dry kiln and calcining kiln, it is characterized in that: dry kiln and calcining kiln are set up in parallel; Be respectively equipped with dry kiln air delivery duct outside the interior kiln wall of the dry kiln left and right sides, be communicated with several air outlets between the inner chamber of dry kiln and dry kiln air delivery duct, have the rail of coming in and going out for kiln car below inner chamber, dry kiln top is provided with the humidity discharging mouth of discharging humid air; Calcining kiln wind pumping channle is respectively equipped with outside the interior kiln wall of the calcining kiln left and right sides, several suction opeings are communicated with between the inner chamber of calcining kiln and calcining kiln wind pumping channle, suction opeing is provided with the adjustable air lock for controlling firing temperature curve, has the rail of coming in and going out for kiln car below inner chamber; Be communicated with by blower fan between dry kiln air delivery duct with calcining kiln wind pumping channle, the heat smoke in calcining kiln extracted out and is sent to dry kiln drying and preheating adobe; Roasting kiln is connected the built-in air channel of kiln body with dry kiln body two kiln body is mutually arranged side by side by a frequency conversion centrifugal fan being arranged on kiln top; Blower fan is arranged on the kiln discharge end entering kiln end and dry kiln of calcining kiln; Calcining kiln indoor kiln wall bilateral symmetry is provided with two air channels and multiple suction opeing, and is provided with in preheating zone and somely takes out hot-air mouth, arrange somely take out waste heat mouth and send cold wind mouth at salband; The atmosphere system in calcining kiln, pressure regime and temperature control system is controlled by the opening and closing of these air port air locks; Sintering curve can be controlled according to different raw-material adobes; Calcining kiln top adopts light weight alumina to gather hydrogen refractory brick, and refractory brick top covers certain thickness resistance to guncotton, and kiln top also has cavity, plays the effect of top chamber heat exchange, and the hot-air in chamber can be used for dry brick and also play good insulation effect; Coal feeding hole is left on kiln top;

The heat smoke of calcining kiln is extracted out and delivers in the air channel of dry kiln by the frequency conversion centrifugal fan being arranged on kiln top, Yao Qiang both sides in dry kiln body are provided with some air outlets according to the position of each kiln car, heat smoke by the end supreme through adobe to reach dry object, dry kiln top is also arrange humidity discharging mouth respectively according to the position of kiln car to be discharged to outside kiln by malaria;

Once-setting firing tunnel kiln, bottom is concrete foundation, the outermost layer of dry kiln and calcining kiln is outer kiln wall, outer kiln has heat-insulation layer within the walls, kiln body inside is also provided with Nei Yaoqiang, air outlet and suction opeing are arranged on interior kiln wall, interior kiln wall is positioned at the left and right sides bottom kiln car and is provided with sand sealing groove, the sand for lowering the temperature to kiln car is filled in sand sealing groove, calcining kiln top is provided with coal feeding hole, inside top is provided with furred ceiling refractory brick, and top outer is provided with prefabricated board, is provided with furred ceiling I-steel between prefabricated board and furred ceiling refractory brick.