Calcium carbide furnace with furnace bottom temperature measurement function

Abstract

The utility model relates to the technical field of calcium carbide furnaces, in particular to a calcium carbide furnace with a furnace bottom temperature measuring function, which comprises a calcium carbide furnace body, a sheathed thermocouple, a protective sleeve, a temperature transmitter, a PLC (programmable logic controller) and a display screen, a refractory brick layer is arranged at the bottom of the calcium carbide furnace body, the protective sleeve is arranged in the refractory brick layer, and the sheathed thermocouple is mounted in the protective sleeve. The signal output end of the sheathed thermocouple is connected with the signal input end of the temperature transmitter, the signal output end of the temperature transmitter is connected with the signal input end of the PLC, and the signal output end of the PLC is connected with the signal input end of the display screen. The calcium carbide furnace bottom temperature measuring device is reasonable in structure, automatic temperature measurement of the calcium carbide furnace bottom is achieved, an operator does not need to hold the temperature measuring device by hand to get close to the high-temperature furnace bottom for measurement operation, and the situations that high-temperature burning and scalding, CO poisoning and the like are prone to occurring during manual operation are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of calcium carbide furnaces, and is a calcium carbide furnace with a function of measuring the temperature at the furnace bottom. Background Technique

[0002] The temperature at the furnace bottom of the calcium carbide furnace has important guiding significance for judging the major overhaul and basic operations of the calcium carbide furnace, and has important reference value for the silicon iron deposition at the furnace bottom, the burden ratio of the furnace charge and the operating current. For example, when the temperature at the furnace bottom exceeds 700 °C and cannot be reduced by adjusting the process ratio, and the duration exceeds 7 to 9 days, it can be judged that the silicon iron accumulation at the furnace bottom is serious and major overhaul and furnace digging are required. Therefore, this temperature is very important for process operation and safety production. At present, the temperature at the furnace bottom of the calcium carbide furnace is measured by on-site inspectors using a temperature measuring gun, and there is a deviation between the measured value and the true value. When the on-site inspector measures on-site, he is close to the high-temperature furnace bottom, and there are major risk factors such as high-temperature burns and CO poisoning in the working environment. On average, each calcium carbide furnace is measured 9 times a day, with a large measurement workload and many dangerous sources in the inspection site. Summary of the Invention

[0003] The utility model provides a calcium carbide furnace with a function of measuring the temperature at the furnace bottom, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problems of high manual operation risk and large operation volume in the measurement of the temperature at the furnace bottom of the existing calcium carbide furnace.

[0004] The technical solution of the utility model is realized by the following measures: a calcium carbide furnace with a function of measuring the temperature at the furnace bottom, including a calcium carbide furnace body, a sheathed thermocouple, a protection sleeve, a temperature transmitter, a PLC controller and a display screen. A refractory brick layer is provided at the bottom of the calcium carbide furnace body, a protection sleeve is arranged inside the refractory brick layer, a sheathed thermocouple is installed inside the protection sleeve, the signal output end of the sheathed thermocouple is connected to the signal input end of the temperature transmitter, the signal output end of the temperature transmitter is connected to the signal input end of the PLC controller, and the signal output end of the PLC controller is connected to the signal input end of the display screen.

[0005] The following is a further optimization and / or improvement of the above-mentioned utility model solution:

[0006] The above protection sleeve may include a sleeve body with an upper end opening and a lower end closed arranged vertically. The sheathed thermocouple is threadedly installed inside the sleeve body, and an outer ring platform is arranged outside the sleeve body.

[0007] The thickness of the above outer ring platform may be 0.5 mm, and the difference between the inner and outer diameters of the outer ring platform is 5 cm.

[0008] The above-mentioned armored thermocouple, protective sleeve and temperature transmitter can all be three. The three protective sleeves are evenly spaced circumferentially along the center of the calcium carbide furnace body at the bottom of the calcium carbide furnace body. The three armored thermocouples are correspondingly installed in the three protective sleeves, and the three temperature transmitters and the three armored thermocouples are correspondingly connected.

[0009] The length of the above-mentioned armored thermocouple can be 10 meters.

[0010] The structure of the utility model is reasonable, and it realizes the automatic temperature measurement of the bottom of the calcium carbide furnace. Therefore, there is no need for operators to hold a temperature measuring device close to the high-temperature furnace bottom for measurement operations, avoiding the occurrence of situations such as high-temperature burns and CO poisoning that are prone to occur during manual operations. Description of the Drawings

[0011] Appendix Figure 1 It is a schematic structural diagram of the best embodiment of the utility model.

[0012] Appendix Figure 2 It is a schematic structural diagram of the protective sleeve arranged in the refractory brick layer in the best embodiment of the utility model.

[0013] The codes in the drawings are respectively: 1 is the calcium carbide furnace body, 2 is the armored thermocouple, 3 is the protective sleeve, 4 is the temperature transmitter, 5 is the PLC controller, 6 is the display screen, 7 is the refractory brick layer, and 8 is the outer ring platform. Detailed Embodiment

[0014] The utility model is not limited by the following embodiments, and the specific implementation manner can be determined according to the technical solution of the utility model and the actual situation.

[0015] In the utility model, for the convenience of description, the description of the relative position relationship of each component is carried out according to the layout mode of the drawings in the specification. For example, the position relationships such as front, back, up, down, left, and right are determined according to the layout direction of the drawings in the specification. Figure 1 The position relationships such as front, back, up, down, left, and right are determined according to the layout direction of the drawings in the specification.

[0016] The following further describes the utility model in conjunction with the embodiments and the drawings:

[0017] As shown in the appendix Figure 1-2 The calcium carbide furnace with the function of measuring the temperature of the furnace bottom includes a calcium carbide furnace body 1, an armored thermocouple 2, a protective sleeve 3, a temperature transmitter 4, a PLC controller 5 and a display screen 6. A refractory brick layer 7 is provided at the bottom of the calcium carbide furnace body 1. The protective sleeve 3 is arranged in the refractory brick layer 7. The armored thermocouple 2 is installed in the protective sleeve 3. The signal output end of the armored thermocouple 2 is connected to the signal input end of the temperature transmitter 4. The signal output end of the temperature transmitter 4 is connected to the signal input end of the PLC controller 5. The signal output end of the PLC controller 5 is connected to the signal input end of the display screen 6.

[0018] According to requirements, the armored thermocouple 2, temperature transmitter 4, PLC controller 5, and display screen 6 can all adopt existing well-known technologies. By arranging the armored thermocouple 2 at the furnace bottom of the calcium carbide furnace body 1, the temperature collected by the armored thermocouple 2 is sequentially transmitted to the temperature transmitter 4 and PLC controller 5, and finally the temperature of the furnace bottom of the calcium carbide furnace is displayed on the display screen 6. Thus, there is no need for operators to hold a temperature measuring device close to the high-temperature furnace bottom for measurement operations, avoiding the occurrence of situations such as high-temperature burns and CO poisoning during manual operations.

[0019] According to actual needs, the above embodiments can be further optimized and / or improved:

[0020] As shown in the appendix Figure 1-2 As shown, the protective sleeve 3 includes a sleeve body with an upper opening and a lower closed end arranged vertically. The armored thermocouple 2 is threadedly installed in the sleeve body, and an outer ring platform 8 is provided outside the sleeve body. Specifically, the thickness of the outer ring platform 8 is 0.5 mm, and the difference between the outer diameter and inner diameter of the outer ring platform 8 is 5 cm. When laying the refractory brick layer 7 at the furnace bottom, the outer ring platform 8 is pressed between two layers of refractory bricks, thereby achieving the purpose of placing the protective sleeve 3 in the refractory brick layer 7.

[0021] As shown in the appendix Figure 1 As shown, there are three armored thermocouples 2, three protective sleeves 3, and three temperature transmitters 4. The three protective sleeves 3 are evenly spaced circumferentially around the center of the calcium carbide furnace body 1 at the bottom of the calcium carbide furnace body 1. The three armored thermocouples 2 are correspondingly installed in the three protective sleeves 3 one by one, and the three temperature transmitters 4 and the three armored thermocouples 2 are correspondingly connected one by one. Three temperature acquisition points are set, and the three acquisition points are evenly spaced circumferentially around the furnace bottom center.

[0022] Specifically, the length of the armored thermocouple 2 is 10 m. Thus, the armored thermocouple 2 can be led out from the high-temperature area at the furnace bottom and directly connected to the temperature transmitter 4, without the need to connect a compensating wire between the armored thermocouple 2 and the temperature transmitter 4.

[0023] The above technical features constitute the best embodiment of the present utility model, which has strong adaptability and the best implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A calcium carbide furnace with the function of measuring the temperature at the furnace bottom, characterized in that It includes an electric calcium carbide furnace body, armored thermocouples, protection sleeves, temperature transmitters, a PLC controller and a display screen. A refractory brick layer is provided at the bottom of the electric calcium carbide furnace body. A protection sleeve is arranged inside the refractory brick layer. An armored thermocouple is installed inside the protection sleeve. The signal output end of the armored thermocouple is connected to the signal input end of the temperature transmitter. The signal output end of the temperature transmitter is connected to the signal input end of the PLC controller. The signal output end of the PLC controller is connected to the signal input end of the display screen; The protection sleeve includes a sleeve body with an upper end opening and a lower end closed, which is vertically arranged. The armored thermocouple is installed in the sleeve body by threading. An outer ring platform is provided on the outside of the sleeve body; The thickness of the outer ring platform is 0.5 mm, and the difference between the inner and outer diameters of the outer ring platform is 5 cm; There are three armored thermocouples, three protection sleeves and three temperature transmitters. The three protection sleeves are evenly spaced along the circumference around the center of the electric calcium carbide furnace body at the bottom of the electric calcium carbide furnace body. The three armored thermocouples are respectively installed in the three protection sleeves. The three temperature transmitters are respectively connected to the three armored thermocouples; The length of the armored thermocouple is 10 m.

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