CN206572939U - Gas roller kiln with tail gas treatment device - Google Patents

Abstract

The utility model belongs to the technical field of sintering equipment, and relates to a gas roller kiln with a tail gas treatment device, wherein a smoke exhaust branch pipe connected with an air inlet pipe of the tail gas treatment device is arranged at the top of a preheating section, a burner connected with a gas pipe is arranged in a firing section, a combustion-supporting air pipe is arranged at one side of the burner, a cold air pipe is arranged in a cooling section, a heat extraction air pipe is arranged at the top of the cooling section, and the heat extraction air pipe is connected with an inner air inlet of a heat exchanger through a heat extraction air blower; the air inlet pipe is connected with a smoke exhaust branch pipe at the top of the kiln, a fan is arranged on the air inlet pipe, the air inlet pipe is connected with an air inlet of the combustion chamber, an air outlet of the combustion chamber is connected with an inner air inlet of the heat exchanger, an inner air outlet of the heat exchanger is connected with an exhaust pipe, and a second induced draft fan is arranged on an outgoing air pipe of the heat exchanger; the burner in the combustion chamber is connected with a gas pipe; a smoke exhaust butterfly valve is arranged on the exhaust pipe; the heat in the tail gas of the preheating section and the cooling section of the kiln is recycled, so that the energy is saved; the tail gas treatment equipment is simple, convenient to operate, safe and reliable.

Description

Gas roller kiln with tail gas treatment device

technical field

The utility model belongs to the technical field of sintering equipment, in particular to a gas-fired roller kiln for sintering with a tail gas treatment device.

Background technique

The firing of traditional ceramic foam filters mostly uses ordinary electric furnaces, which have relatively high power consumption, high labor intensity, environmental pollution, high reburning consumption, low thermal efficiency of kilns, and electric furnaces mainly rely on electric energy to achieve heating and burning. It is a secondary energy source, the energy consumption is too high, and the temperature control is not easy to operate, resulting in uneven internal and external temperatures of the product and low product qualification rate.

The kiln body of the existing gas-fired roller kiln is divided into multiple units, including a preheating section, a firing section and a cooling section. The smoke exhaust outlet connected with the smoke exhaust branch pipe is set; the smoke exhaust branch pipe is equipped with a regulating valve, the smoke exhaust branch pipe is collected in the smoke exhaust main pipe, and the smoke exhaust main pipe is equipped with a smoke exhaust fan; when the smoke exhaust fan is working, the subsequent firing section The flue gas is attracted to the preheating section to complete the preheating of the product to be sintered, and the cross-section temperature of the preheating end is adjustable; there are multiple sets of burners in the firing section, and the burners are respectively connected to the controller; the burners are connected to the gas pipe One side of each burner is equipped with a combustion-supporting air duct, and the combustion-supporting air duct is connected to the combustion-supporting fan; natural gas is used for heating, the local temperature difference is small, the burner switch can be controlled, and the sintering temperature curve is stable; the cooling section includes a transition unit, quenching unit and cooling unit, and finally complete the cooling output.

The heat of the exhaust gas produced in the kiln is not fully utilized.

Utility model content

The purpose of this utility model is to overcome the shortcomings of the existing technology and seek to design a gas-fired roller kiln with an exhaust gas treatment device that can ensure the full combustion of the waste gas in the preheating section and ensure the utilization and recovery of the heat of the kiln exhaust.

The technical scheme of the utility model is as follows:

A gas-fired roller kiln with a tail gas treatment device. The kiln body includes a preheating section, a firing section, and a cooling section connected in sequence. The top of the preheating section is provided with a branch pipe for exhaust gas, and the branch pipe for exhaust gas is connected to the tail gas treatment device. The air intake pipe is connected, and the smoke exhaust branch pipe is provided with a regulating valve; the burner is provided in the burning section, and the burner is connected with the gas pipe. The cooling section is equipped with a cold air pipe, which is connected to the cooling fan, and the top of the cooling section is provided with a hot air branch pipe, which gathers in the hot air pipe, and the hot air pipe passes through the hot air fan and the heat exchanger. The inner air inlet connection of the heater;

The tail gas treatment device includes an air intake pipe, a combustion chamber, a heat exchanger and an exhaust pipe. The air intake pipe is connected to the smoke exhaust branch pipe on the top of the kiln. The air intake pipe is provided with a fan, and the air intake pipe is connected to the air inlet of the combustion chamber. connected, a main regulating valve is provided between the intake pipe and the air inlet of the combustion chamber; the air outlet of the combustion chamber is connected with the inner air inlet of the heat exchanger, the bottom of the heat exchanger is provided with a drain port, and the outlet of the heat exchanger is The inner gas outlet is connected to the exhaust pipe through the induced draft fan, and the induced draft fan 2 is installed on the outgoing air pipe of the heat exchanger; a burner is provided in the combustion chamber, and the burner is connected to the gas pipe; one side of the gas pipe is provided with a combustion-supporting pipe , the combustion intensity is controlled by adjusting the valve; the exhaust pipe is provided with a smoke exhaust butterfly valve, and its opening can be adjusted.

Preferably, a fire viewing hole is provided on the side of the combustion chamber, and the size of the flame can be observed through the fire viewing hole to further ensure the full combustion of the exhaust gas.

When in use, connect the inlet pipe of the kiln tail gas treatment device to the exhaust pipe on the top of the kiln, and the exhaust gas at the top of the preheating section of the kiln is sucked away by the fan, and the tail gas enters the combustion chamber under the control of the main regulating valve. The amount entering the combustion chamber is controlled by the main regulating valve to ensure that the temperature curve in the kiln meets the sintering requirements, and properly adjust the opening of the valve on the combustion-supporting pipe to ensure full combustion of the exhaust gas; It enters the heat exchanger, transfers the heat in the gas after combustion, and then discharges it through the exhaust pipe. The gas heated in the heat exchanger is mixed with the gas collected by the hot exhaust fan in the cooling section, and then enters the preheating section through the pipeline for heating . At the same time, the high-temperature gas in the cooling section is also discharged after passing through the heat exchanger, making full use of the heat.

The beneficial effects of the utility model are:

(1) Realize the full combustion of the tail gas in the preheating section by adjusting the gas intake, and adjust the opening of the exhaust pipe through the butterfly valve to ensure the full combustion of the tail gas and reduce environmental pollution;

(2) The heat in the exhaust gas in the preheating section and cooling section of the kiln is recovered and utilized to save energy;

(3) The tail gas treatment equipment is simple, easy to operate, safe and reliable.

Description of drawings

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

Fig. 2 is an enlarged view of a part of the structure of the utility model.

detailed description

Below through accompanying drawing and specific embodiment, the utility model is described in detail.

Example 1

The gas-fired roller kiln with tail gas treatment device in this embodiment includes a kiln body including a preheating section 1, a firing section 2 and a cooling section 3 connected in sequence, and the top of the preheating section 1 is provided with a smoke exhaust branch pipe 12, The smoke exhaust branch pipe 12 is connected with the intake pipe 41 of the tail gas treatment device, and the smoke exhaust branch pipe 12 is provided with a regulating valve 11; the burning section 2 is provided with a burner 21, and the burner 21 is connected with the gas pipe 1 22, each One side of the burner 21 is provided with a combustion-supporting air pipe, and the combustion-supporting air pipe is connected with the combustion-supporting fan 23; the cooling section 3 is provided with a cold air pipe 31, and the cold air pipe 31 is connected with the cooling fan; The branch pipe 38, the hot air branch pipe 38 is collected in the hot air pipe 37, and the hot air pipe 37 is connected with the inner air inlet of the heat exchanger through the hot air fan 34;

The tail gas treatment device includes an air inlet pipe 41, a combustion chamber 47, a heat exchanger 412 and an exhaust pipe 45. The air inlet pipe 41 is connected to the exhaust branch pipe 12 of the kiln preheating section, and the air inlet pipe 41 is provided with a fan 410, the air intake pipe 41 is connected to the air inlet of the combustion chamber 47, and the main regulating valve 42 is arranged between the air intake pipe 41 and the air inlet of the combustion chamber 47; The air outlets are connected, the bottom of the heat exchanger 412 is provided with a drain port 415, the inner air outlet of the heat exchanger 412 is connected with the exhaust pipe 45 through the induced draft fan 413, and the outer air outlet pipe 414 of the heat exchanger 412 is provided with an induced draft fan 2 411 ; Burner 43 is provided in combustion chamber 47, and burner 43 is connected with gas pipe 48; One side of gas pipe 48 is provided with combustion-supporting pipe, and the size of combustion intensity is controlled by the regulating valve on the combustion-supporting pipe; There is a smoke exhaust butterfly valve, the opening of which can be adjusted.

The side of the combustion chamber 47 is provided with a fire viewing hole 44, and the size of the flame can be observed through the fire viewing hole 44 to further ensure the full combustion of the exhaust gas

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present invention.

Claims (2)

1. a kind of fuel gas table kiln stove of magnetic tape trailer Flash Gas Compression Skid System, including kiln body include being sequentially connected preheating section (1), burn till section (2) and cooling section (3), the top of the preheating section (1) is provided with smoke evacuation branch pipe (12), smoke evacuation branch pipe (12) and exhaust gas processing device Air inlet pipe (41) connection, smoke evacuation branch pipe (12) be provided with regulating valve (11)；Described burn till is provided with burner (21) in section (2), burn Mouth (21) is connected with Gas Pipe one (22), and the side of each burner (21) is provided with combustion-supporting airduct, combustion-supporting airduct and combustion fan (23) it is connected；Cool air hose (31) is provided with the cooling section (3), cool air hose (31) is connected with air-cooler, the top of cooling section (3) Provided with hot blast manifold (38) is taken out, take out hot blast manifold (38) and come together in and take out warm-air pipe (37), it is characterised in that：

Take out warm-air pipe (37) and be connected by taking out air-heater (34) with the interior air inlet of heat exchanger；

The exhaust gas processing device, including air inlet pipe (41), combustion chamber (47), heat exchanger (412) and blast pipe (45), it is described enter Tracheae (41) is connected with the smoke evacuation branch pipe (12) of kiln preheating section, air inlet pipe (41) be provided with blower fan (410), air inlet pipe (41) with The air inlet of combustion chamber (47) is connected, and main inlet control valve (42) is provided between air inlet pipe (41) and combustion chamber (47) air inlet；It is described The gas outlet of combustion chamber (47) is connected with the interior air inlet of heat exchanger (412), and the bottom of heat exchanger (412) is provided with discharge outlet (415), the interior gas outlet of heat exchanger (412) is connected by air-introduced machine (413) with blast pipe (45), heat exchanger (412) it is outgoing Tracheae (414) is provided with air-introduced machine two (411)；Burner (43) is provided with combustion chamber (47), burner (43) connects with Gas Pipe (48) Connect；The side of Gas Pipe (48) is provided with combustion tube；Blast pipe (45) is provided with smoke evacuation butterfly valve.

2. the fuel gas table kiln stove of magnetic tape trailer Flash Gas Compression Skid System according to claim 1, it is characterised in that：The combustion chamber (47) side is provided with flame-observing hole (44).