Device for monitoring natural gas combustion of metallurgical furnace

Abstract

The utility model discloses a device for monitoring natural gas combustion of a metallurgical furnace. The device comprises a flame detector, a flame detector fire observation mirror, a flame detector protection mirror, a flame detector outer tube and a cooling device, one end of the flame detector outer tube is in threaded connection with the flame detector; the flame detector fire observation mirror is located in the flame detector outer tube and connected with the flame detector. The cooling device is arranged outside the flame detector outer tube; the flame detector protection glass is located in the flame detector outer tube and located on the front side of the flame detector fire observation glass. Negative pressure fluctuation and dust can be isolated through the flame detector protection mirror and the flame detector outer tube, the flame detector fire observation mirror and the flame detector are protected against damage, the temperature of the flame detector and the flame detector outer tube can be effectively reduced through the cooling device, damage caused by high temperature is prevented, and the service life of the flame detector is prolonged. And the safety and reliability of the whole monitoring system are improved, so that the operation efficiency and the production benefit of the kiln are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the metallurgical furnace kiln monitoring technical field, concretely relates to a device for monitoring metallurgical furnace kiln natural gas combustion. BACKGROUND

[0002] In the metallurgical industry, heavy oil is often used as the combustion medium of the metallurgical furnace kiln due to its low viscosity, low freezing point, high flash point temperature and few mechanical impurities. However, with the rising oil price and resource scarcity, the quality of heavy oil decreases, which leads to frequent blockage of the heavy oil tank and the heavy oil valve station of the metallurgical furnace kiln, affects the production efficiency, and even causes the furnace kiln to stop working in serious cases. Therefore, smelting enterprises will be equipped with a natural gas system as a backup energy source. Natural gas has the advantages of being clean, stable in flow, and easy to obtain. However, the use of natural gas in the metallurgical furnace kiln requires combustion in the furnace kiln. When the combustion condition cannot be observed, long-term use of natural gas poses a risk of explosion. Therefore, a flame detector needs to be equipped.

[0003] The flame detector is an important device in the safety monitoring system of the boiler furnace, mainly composed of a probe and a signal processor. Its function is to detect the combustion condition in real time according to the combustion characteristics of the flame. Once the flame burning state does not meet the normal conditions or goes out, a signal is given in a certain way to ensure that the boiler stops fuel supply when it goes out.

[0004] However, due to the high temperature and dust environment of the metallurgical furnace kiln for a long time, the flame detector is easily damaged, increasing the maintenance cost, and may cause the furnace kiln to stop working due to failure, reducing the operation efficiency and production benefit of the furnace kiln. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a device for monitoring the natural gas combustion of the metallurgical furnace kiln, which can effectively isolate high temperature and dust, is safe and reliable, and is easy to operate, to solve the technical problem that the flame detector is easily damaged in monitoring the metallurgical furnace kiln, increases the maintenance cost, and easily causes the furnace kiln to stop working, thereby reducing the operation efficiency and production benefit of the furnace kiln.

[0006] In order to solve the above technical problems, the utility model adopts the following scheme:

[0007] The utility model provides a device for monitoring metallurgical furnace natural gas combustion, including flame detector, flame detector fire watching mirror, flame detector protection mirror, flame detector outer tube and cooling device, one end of flame detector outer tube is connected with flame detector screw thread, flame detector fire watching mirror is located in the inside of flame detector outer tube and is connected with flame detector, cooling device is installed in the outside of flame detector outer tube, flame detector protection mirror is located in the inside of flame detector outer tube and is located the front side of flame detector fire watching mirror, the hollow shape of flame detector outer tube is installed on flame detector, and flame detector observes the flame state in metallurgical furnace through flame detector fire watching mirror, flame detector protection mirror can insulate negative pressure fluctuation from the influence of flame detector outer tube inside to flame detector fire watching mirror, is used for protecting flame detector fire watching mirror not to be damaged by negative pressure fluctuation, and flame detector protection mirror can insulate dust and heat and focus flame signal with flame detector outer tube, and cooling device reduces the temperature of flame detector, flame detector outer tube and the surrounding environment of device, prevents flame detector from being damaged due to high temperature.

[0008] Further, the cooling device includes an air inlet and an air inlet pipe; the air inlet pipe is annularly sleeved on the outside of the flame detector outer tube, and an air outlet ring pipe is arranged at one end of the air inlet pipe close to the flame detector, and the other end of the air inlet pipe is sealed; a plurality of air outlet holes are formed in the air outlet ring pipe and the air inlet pipe; and the air inlet is fixedly installed in the middle of the air inlet pipe. The air inlet transports cooling gas to the air inlet pipe through an external pipeline, the cooling gas is sprayed out of the air outlet holes of the air outlet ring pipe and the air inlet pipe, the cooling gas sprayed out of the air outlet holes of the air outlet ring pipe cools the temperature around the flame detector outer tube, and the cooling gas sprayed out of the air outlet holes of the air outlet ring pipe cools the temperature around the flame detector, preventing the flame detector from being damaged due to high temperature and ensuring stable and reliable operation of the flame detector. One end of the air inlet pipe is provided with the air outlet ring pipe, and the other end of the air inlet pipe is sealed, so that the cooling gas can escape from the air outlet holes of the air outlet ring pipe and the air inlet pipe, forming a cooling air flow around the flame detector.

[0009] Further, the cooling device introduces cooling gas to cool the flame detector and the flame detector outer tube; and the cooling gas is one of compressed air or inert gas. The cooling device uses compressed air or inert gas as refrigerant to absorb the heat of the flame detector and the flame detector outer tube, thereby achieving the cooling effect. Air and inert gas are a kind of gas that does not chemically react with the environment, which is suitable for use in an environment containing flammable and explosive substances, thereby avoiding the possibility of fire.

[0010] Further, the air inlet is vertically connected with the air inlet pipeline. The vertical connection of the air inlet with the air inlet pipeline enables the cooling gas to enter the air inlet pipeline in a more direct and efficient manner, improves the cooling efficiency of the whole cooling device, ensures that the flame detector and the surrounding environment thereof can be effectively cooled, and the air inlet vertically connected with the air inlet pipeline can serve as a handle when the flame detector is taken out of the metallurgical furnace, thereby facilitating the pulling out of the flame detector outer pipe.

[0011] The interlocking control system is connected between the flame detector and the natural gas burner in the metallurgical furnace, can prevent false judgment of the flame detector, and triggers a flame burner closing instruction within 500 milliseconds and sends an alarm signal when the flame detector fails to detect a flame signal for 20 seconds, so that workers can check whether the flame detector is intact, and the use is more convenient and safe.

[0012] The working principle of the utility model is as follows:

[0013] In use, the air inlet is gripped, the front half of the flame detector outer pipe is inserted into the metallurgical furnace, the flame detector is turned on, cooling gas is introduced into the air inlet pipeline through the air inlet, and then is sprayed out through the gas outlet hole, the cooling gas sprayed out of the gas outlet hole of the gas outlet ring pipe cools the flame detector outer pipe, the cooling gas sprayed out of the gas outlet hole of the gas outlet ring pipe cools the flame detector, the flame detector observes the flame state in the metallurgical furnace through the flame observation mirror, the flame detector protection mirror can isolate the negative pressure fluctuation from affecting the flame observation mirror of the flame detector from the inside of the flame detector outer pipe, is used for protecting the flame observation mirror of the flame detector from being damaged by the negative pressure fluctuation, the flame detector outer pipe can isolate the dust and heat from directly contacting the detection port of the flame detector, and the flame detector protection mirror and the flame observation mirror in the inside can play a role in focusing the flame signal, so that the flame detector can detect conveniently.

[0014] The utility model has the advantages of:

[0015] 1. The flame detector protection mirror and the flame detector outer pipe can isolate the negative pressure fluctuation and the dust, protect the flame observation mirror and the flame detector from being damaged, the cooling device can effectively reduce the temperature of the flame detector and the flame detector outer pipe, prevent the device from being damaged due to high temperature, improve the safety and reliability of the whole monitoring system, and thereby improve the operation efficiency and production benefit of the furnace.

[0016] 2、The utility model discloses air inlet and air inlet pipeline are vertical connection, make cooling gas can enter air inlet pipeline with more direct and efficient mode, improve cooling efficiency, and when taking out flame detector, act as handle, convenient to take out flame detector, make operation more convenient, the compressed air or inert gas of cooling device adoption is as refrigerant, not only absorbs heat and realizes cooling effect, and compressed air or inert gas does not have chemical effect to environment, is suitable for using in flammable and explosive environment, reduces the risk of fire, enhances the environmental adaptability of device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the front view structure schematic diagram of the utility model;

[0018] Figure 2 It is the front view section structure schematic diagram of the utility model.

[0019] In the drawing: 1, flame detector; 2, flame detector fire watching mirror; 3, air inlet; 4, flame detector protection mirror; 5, flame detector outer tube; 6, air inlet pipeline; 7, air outlet ring pipe; 8, air outlet hole. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0021] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicative or suggestive of relative importance, and in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] The utility model discloses a device for monitoring metallurgical furnace kiln natural gas combustion makes further detailed instructions below: Example 1

[0023] A device for monitoring metallurgical furnace kiln natural gas combustion, including flame detector 1, flame detector fire watching mirror 2, flame detector protection mirror 4, flame detector outer tube 5 and cooling device, flame detector outer tube 5 one end with flame detector 1 screw connection, flame detector fire watching mirror 2 is located the inside of flame detector outer tube 5, and is connected with flame detector 1, cooling device is installed the outside of flame detector outer tube 5, flame detector protection mirror 4 is located the inside of flame detector outer tube 5, and is located flame detector fire watching mirror 2's front side.

[0024] The working principle of this embodiment is as follows:

[0025] When using, the front half of the flame detector outer tube 5 is inserted into the metallurgical furnace kiln, the flame detector 1 is turned on, and the cooling device is turned on at the same time. The flame detector 1 observes the flame state in the metallurgical furnace kiln through the flame fire watching mirror 2. The flame detector protection mirror 4 can isolate the negative pressure fluctuation from the inside of the flame detector outer tube 5 to the flame detector fire watching mirror 2, which is used to protect the flame detector fire watching mirror 2 from being damaged by negative pressure fluctuation. The flame detector outer tube 5 can isolate the direct contact of dust and heat with the detection port of the flame detector 1. At the same time, through the internal flame detector protection mirror 4 and flame detector fire watching mirror 2, the function of focusing the flame signal can be achieved, which is convenient for the flame detector 1 to detect. The cooling device can effectively reduce the temperature of the flame detector 1 and the flame detector outer tube 5, preventing the device from being damaged due to high temperature. Example 2

[0026] Different from the embodiment 1, the cooling device comprises an air inlet 3 and an air inlet pipe 6; the air inlet pipe 6 is sleeved around the outside of the flame detector outer pipe 5, and an air outlet ring pipe 7 is arranged at one end of the flame detector 1, and the other end is sealed; a plurality of air outlet holes 8 are arranged on the air outlet ring pipe 7 and the air inlet pipe 6; the air inlet 3 is fixedly installed at the middle part of the air inlet pipe 6; the cooling device is connected with cooling gas to cool the flame detector 1 and the flame detector outer pipe 5; the cooling gas is compressed air; the air inlet 3 is connected with the air inlet pipe 6 vertically. The air inlet 3 transports the compressed air to the air inlet pipe 6 through an external pipeline, and the air inlet 3 is connected with the air inlet pipe 6 vertically, so that the cooling gas can enter the air inlet pipe 6 in a more direct and efficient manner, the cooling efficiency of the whole cooling device is improved, the cooling gas is sprayed out from the air outlet holes 8 uniformly arranged on the air outlet ring pipe 7 and the air inlet pipe 6, the cooling gas sprayed out from the air outlet holes 8 of the air outlet ring pipe 7 cools the temperature of the flame detector outer pipe 5 and the surrounding environment, the cooling gas sprayed out from the air outlet holes 8 of the air outlet ring pipe 7 cools the temperature of the flame detector 1 and the surrounding environment, so as to prevent the flame detector 1 from being damaged due to high temperature, and ensure the stable and reliable operation of the flame detector 1.

[0027] The working principle of the embodiment is the same as that of the embodiment 1.

[0028] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application, for the person skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. A device for monitoring the combustion of natural gas in metallurgical furnaces, characterized in that: It includes a flame detector (1), a flame detector viewing mirror (2), a flame detector protective mirror (4), a flame detector outer tube (5), and a cooling device; one end of the flame detector outer tube (5) is threadedly connected to the flame detector (1); the flame detector viewing mirror (2) is located inside the flame detector outer tube (5) and connected to the flame detector (1); the cooling device is installed outside the flame detector outer tube (5); the flame detector protective mirror (4) is located inside the flame detector outer tube (5) and is located in front of the flame detector viewing mirror (2).

2. The device for monitoring natural gas combustion in metallurgical furnaces according to claim 1, characterized in that: The cooling device includes an air inlet (3) and an air inlet pipe (6); the air inlet pipe (6) is sleeved around the outside of the outer tube (5) of the flame detector, and an air outlet ring pipe (7) is provided at one end near the flame detector (1), while the other end is sealed; a number of air outlet holes (8) are provided on the air outlet ring pipe (7) and the air inlet pipe (6); the air inlet (3) is fixedly installed in the middle of the air inlet pipe (6).

3. The device for monitoring natural gas combustion in metallurgical furnaces according to claim 2, characterized in that: The cooling device introduces cooling gas to cool the flame detector (1) and the outer tube (5) of the flame detector; the cooling gas is either compressed air or an inert gas.

4. The device for monitoring natural gas combustion in metallurgical furnaces according to claim 2, characterized in that: The air inlet (3) is vertically connected to the air inlet duct (6).

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