CN205839109U - A kind of nitriding furnace being provided with emission-control equipment - Google Patents

Abstract

The utility model discloses a nitriding furnace provided with a waste gas treatment device, which comprises a furnace body provided with a furnace cavity and a waste gas treatment device. The exhaust gas treatment device includes an exhaust gas pipeline, an exhaust gas solenoid valve, an exhaust gas electromagnetic heater, a combustion chamber with an exhaust gas outlet and an electric igniter. One end of the exhaust gas pipeline is connected to the furnace cavity, and the other end of the exhaust gas pipeline is connected to the exhaust gas electromagnetic valve. The exhaust gas electromagnetic valve is connected to the exhaust gas electromagnetic heater through the exhaust gas pipeline, and the exhaust gas electromagnetic heater is connected to the combustion chamber through the exhaust gas pipeline. to ignite the combustible gas in the combustion chamber. The nitriding furnace of the utility model has no ammonia in the exhaust gas, no secondary combustion products such as carbon dioxide, nitrogen dioxide and other harmful gases, has no secondary pollution to the environment, is very environmentally friendly, and has low energy consumption and high automation level .

Description

A nitriding furnace equipped with a waste gas treatment device

technical field

The utility model belongs to the technical field of nitriding furnaces and relates to a nitriding furnace provided with a waste gas treatment device.

Background technique

The exhaust gas produced by the nitriding furnace is mainly ammonia gas. At present, the nitriding furnace in the prior art often has some disadvantages: 1. For example, the waste gas treatment device in the Chinese patent with the application number of 201420006135.4, the waste gas treatment device treats the waste gas by charging the waste gas of the nitriding furnace Enter the water to dissolve the waste gas in the water. After the water is saturated, the water needs to be changed frequently and the discharged water will cause secondary pollution to the environment; 2. For example, the waste gas treatment device in the Chinese patent with application number 201420048246. The exhaust gas method is to pass the exhaust gas from the nitriding furnace into the combustion chamber, and heat the combustion chamber with gas to make the temperature and pressure in the combustion chamber fully combust the exhaust gas. The exhaust gas treatment device has a complex structure, high gas cost, and the presence of A large amount of carbon dioxide and carbon monoxide cause secondary pollution to the environment; 3. Mix the gas with the exhaust gas of the nitriding furnace and burn them together. After burning, a large amount of carbon dioxide and carbon monoxide also cause secondary pollution to the environment; 4. Heightening The chimney of the nitriding furnace directly discharges the exhaust gas of the nitriding furnace to high altitude, which cannot fundamentally solve the defect of polluting the environment; 5. Use electric furnace wire, infrared heating combustion chamber or exhaust gas pipeline to treat the exhaust gas of the nitriding furnace, but 6. The exhaust gas treatment of the nitriding furnace needs to be completed manually, and the automation level is low.

For this reason, it is very necessary to design a nitriding furnace to solve the above technical problems.

Utility model content

The purpose of this utility model is to provide a nitriding furnace equipped with a waste gas treatment device. The waste gas discharged from the nitriding furnace has neither ammonia nor secondary combustion products such as carbon dioxide and nitrogen dioxide, which is harmless to the environment. Secondary pollution, very environmentally friendly, and low energy consumption, high level of automation.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a nitriding furnace equipped with a waste gas treatment device, including a furnace body with a furnace chamber and a waste gas treatment device, and the waste gas treatment device includes a waste gas pipeline, a waste gas Electromagnetic valve, exhaust gas electromagnetic heater, combustion chamber with exhaust gas outlet and electric igniter, one end of the exhaust gas pipeline is connected with the furnace cavity, the other end of the exhaust gas pipeline is connected to the exhaust gas electromagnetic valve, The exhaust gas electromagnetic valve is connected to the exhaust gas electromagnetic heater through the exhaust gas pipeline, the exhaust gas electromagnetic heater is connected to the combustion chamber through the exhaust gas pipeline, and the electric igniter is used to ignite the combustible gas in the combustion chamber. gas.

Further, the exterior of the exhaust gas electromagnetic heater is wound by high-temperature-resistant mica wires, and the interior is an extremely thin "S"-shaped special material tube, and the middle layer is separated by high-temperature-resistant thermal insulation cotton.

Further, the exhaust gas electromagnetic heater is electrically connected to a frequency conversion circuit, and the frequency conversion circuit is electrically connected to a PLC or a microprocessor.

Further, the exhaust gas solenoid valve and the electric igniter are respectively electrically connected with PLC or microprocessor.

Beneficial effects of the utility model: In the nitriding furnace of the utility model, its waste gas treatment device uses electromagnetic heating to pretreat the waste gas. After the waste gas is decomposed and burned, there are only clean water vapor and nitrogen, but no ammonia, and no secondary combustion product carbon dioxide. , nitrogen dioxide and other harmful gases, so the discharged exhaust gas has no secondary pollution to the environment and is very environmentally friendly; due to the use of electromagnetic heating to heat the exhaust gas, the energy consumption is low; the entire exhaust gas treatment work is automatically completed by PLC or microprocessor control, automatic High level.

Description of drawings

Fig. 1 is a schematic structural view of a nitriding furnace according to an embodiment of the present invention.

Explanation of reference signs:

Furnace body 1, exhaust gas treatment device 2;

Furnace chamber 11;

Exhaust gas pipeline 21, exhaust gas solenoid valve 22, exhaust gas electromagnetic heater 23, combustion chamber 24, electric igniter 25.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1, a nitriding furnace provided with a waste gas treatment device in this embodiment. The nitriding furnace includes a furnace body 1 processed with a furnace cavity 11 and a waste gas treatment device 2 . The exhaust gas treatment device 2 includes an exhaust gas pipeline 21, an exhaust gas solenoid valve 22, an exhaust gas electromagnetic heater 23, a combustion chamber 24 processed with an exhaust gas outlet, and an electric igniter 25, wherein the exterior of the exhaust gas electromagnetic heater 23 is wound by a high temperature resistant mica wire , the inside is a very thin "S" shaped special material tube, and the middle layer is separated by high temperature resistant insulation cotton. The lower end of the waste gas pipeline 21 extends into the furnace cavity 11 to communicate with the furnace cavity 11 , and the upper end of the waste gas pipeline 21 is connected to the waste gas solenoid valve 22 . The exhaust gas electromagnetic valve 22 is connected with the exhaust gas electromagnetic heater 23 through the exhaust gas pipeline 21 . The exhaust gas electromagnetic heater 23 is connected with the combustion chamber 24 through the exhaust gas pipeline 21, and the ignition head of the electric igniter 25 is placed inside the combustion chamber 24, and the electric igniter 25 ignites the combustible gas in the combustion chamber 24 during operation. In order to facilitate automatic control, the exhaust gas electromagnetic heater 23 is electrically connected with a frequency conversion circuit (not shown in the drawings), and the frequency conversion circuit is electrically connected with a PLC or a microprocessor (not shown in the drawings), and the exhaust gas electromagnetic valve 22 and an electric igniter 25 is also electrically connected with PLC or microprocessor respectively.

The process and principle of waste gas treatment of the nitriding furnace of the present invention will be further described in detail below.

Working process: PLC or microprocessor controls the exhaust gas electromagnetic heater 23 to energize and heat up, so that the internal special material tube reaches a certain temperature, and then PLC or microprocessor controls the exhaust gas solenoid valve 22 to open to make the exhaust gas in the furnace cavity 11 pass through the exhaust gas pipeline 21 enters the exhaust gas electromagnetic heater 23, and finally PLC or micro-processing controls the electric igniter 25 to ignite, so that the exhaust gas is fully combusted in the combustion chamber 24, and the burned gas is discharged from the exhaust gas outlet, as shown by arrow A in Fig. 1 .

Working principle: the mica wire in the exhaust gas electromagnetic heater 23 passes a high-frequency changing current, thereby generating a high-frequency magnetic field, which makes the internal special material tube produce eddy current effect and generate heat; because the special material tube is extremely thin, " The S" shape structure makes the exhaust gas in the exhaust gas electromagnetic heater 23 heated and the pressure is very high. Under high temperature and high pressure, the ammonia in the exhaust gas is completely decomposed into hydrogen and nitrogen in the exhaust gas electromagnetic heater 23, and the decomposed clean gas Hydrogen and nitrogen enter the combustion chamber 24 through the waste gas pipeline 21. After the electric igniter 25 is ignited by PLC or microprocessor control, the hydrogen is burned, and only water vapor and nitrogen are contained in the waste gas after combustion. Since water vapor and nitrogen are non-polluting gases , so the discharge is environmentally friendly and has no secondary pollution.

In summary, the waste gas treatment device of the utility model has a simple structure, small volume, and good heat preservation effect. Electromagnetic heating is used to pretreat the waste gas, which has low cost and low energy consumption. After the waste gas is decomposed and burned, there is no ammonia gas and no secondary The primary combustion products are carbon dioxide, nitrogen dioxide and other harmful gases, so there is no secondary pollution to the environment, which is very environmentally friendly. It is automatically controlled by PLC or microprocessor, and the automation level is high.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (4)

1. it is provided with a nitriding furnace for emission-control equipment, including the body of heater (1) and the emission-control equipment that are provided with furnace chamber (11) (2), it is characterised in that described emission-control equipment (2) includes that exhaust piping (21), waste gas electromagnetic valve (22), waste gas electromagnetism add Hot device (23), the combustor (24) being provided with waste gas outlet and electric igniter (25), one end of described exhaust piping (21) is with described Furnace chamber (11) is connected, and the other end of described exhaust piping (21) is connected to described waste gas electromagnetic valve (22), described waste gas electromagnetism Valve (22) is connected with described waste gas electromagnetic heater (23) by described exhaust piping (21), described waste gas electromagnetic heater (23) Being connected with described combustor (24) by described exhaust piping (21), described electric igniter (25) is used for lighting described combustor (24) fuel gas in.

A kind of nitriding furnace being provided with emission-control equipment the most according to claim 1, it is characterised in that described waste gas electromagnetism The outside of heater (23) is by resistant to elevated temperatures Muscovitum electric wire coiling, and inside is the superfine special material pipe in serpentine, intermediate layer Separated by resistant to elevated temperatures heat-preservation cotton.

A kind of nitriding furnace being provided with emission-control equipment the most according to claim 1 and 2, it is characterised in that described waste gas Electromagnetic heater (23) electrically connects with frequency changer circuit, and this frequency changer circuit electrically connects with PLC or microprocessor.

A kind of nitriding furnace being provided with emission-control equipment the most according to claim 1, it is characterised in that described waste gas electromagnetism Valve (22) and electric igniter (25) electrically connect with PLC or microprocessor respectively.