Dust filter, carbon and sulfur analyzer and dust filter heating device and method

Abstract

The invention provides a dust filter heating device, a heating method of the heating device, a dust filter comprising the heating device and a carbon and sulfur analyzer comprising the dust filter, and belongs to the technical field of filters. The heating device comprises a metal net dust filter element. The voltage applying device is used for directly applying voltage to the two ends of the metal net dust filter element so as to directly heat the metal net dust filter element. Voltage is directly applied to the metal net dust filter element through the voltage applying device, and due to the fact that the filter element has certain resistance, electric energy can be converted into heat energy, and the temperature of the filter element is increased. The heating mode is more direct and uniform in heating and good in heating effect.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and in particular to a dust filter heating device, a heating method for the heating device, a dust filter comprising the heating device, and a carbon-sulfur analyzer comprising the dust filter. Background Art

[0002] The carbon-sulfur analyzer is a scientific instrument specially used to analyze carbon and sulfur in samples. Generally, the sample is burned in pure oxygen, and carbon and sulfur are converted into carbon dioxide and sulfur dioxide respectively, and then analyzed by infrared absorption. The combustion process is carried out in a crucible or a carrier such as a porcelain boat, and the ignition device includes a tubular furnace, an electric arc furnace, a high-frequency furnace, etc.

[0003] This type of instrument will generate dust during the sample combustion process. The dust in the gas to be tested must be removed by the dust filter on the carbon and sulfur analyzer before it can enter the subsequent gas path. The core component of the dust filter is the filter element, which is a multi-layer sintered metal mesh structure, in which the outer layer is a support structure and the inner layer is a filtering structure, which can ensure that dust larger than a certain particle size cannot pass through, which is generally about 10 microns for carbon and sulfur analyzers.

[0004] When in use, block one end of the dust filter, and the gas containing dust enters from the inside of the filter (filter screen side), and the gas without dust flows out from the outside (support screen side).

[0005] In some cases, the dust filter must work at high temperature, such as to avoid the generation of liquid water, to prevent dust from absorbing other substances, to increase fluidity, etc. For carbon and sulfur analyzers, the main thing is to prevent dust from absorbing the gas to be tested.

[0006] like Figure 1 As shown, the typical heating method at present is to use a spring heater, whose structure is a heating wire and a temperature measuring device integrated in a spiral stainless steel shell.

[0007] When the spring heater 2 is used, the spring coil is installed on the outside of the metal mesh dust filter core 1 in the dust filter housing and is located inside the dust filter housing 5. To avoid touching the heating coil when replacing the metal mesh dust filter core, a support 3 is generally used to fix and isolate the spring heater. The lead position of the spring heater 2 has a sealing ring groove 4, and a sealing ring is generally installed to ensure air tightness.

[0008] The above usage methods are relatively common, and there are also methods of using heating plates, heating rods and other devices to indirectly heat the filter housing.

[0009] The current heating method is indirect heating, and the heat source is generally arranged on the outside of the filter element, which is far away from the heated material (usually dust). The heating effect is not direct enough, and a higher temperature may be required to achieve a good heating effect. Summary of the invention

[0010] In view of this, in order to solve the technical problem that the heating method in the prior art is indirect heating, which is far away from the heated material (generally dust), the heating effect is not direct enough, and a higher temperature may be required to achieve a good heating effect. In the first aspect, the present invention provides a dust filter heating device, which directly applies voltage to the metal mesh dust filter element through a voltage application device. Since the filter element has a certain resistance, the electrical energy will be converted into thermal energy, causing the filter element temperature to rise. This heating method heats more directly and evenly, and has a good heating effect.

[0011] To achieve the above object, the present invention provides the following technical solutions: A dust filter heating device, comprising: Metal mesh dust filter element; A voltage applying device directly applies voltage to both ends of a metal mesh dust filter core to achieve direct heating of the metal mesh dust filter core.

[0012] Preferably, the voltage applying device comprises: transformer; Both ends of the metal mesh dust filter core are elastically in contact with conductive springs connected to the output end of the transformer.

[0013] Preferably, it also includes: A temperature sensor, disposed on the metal mesh dust filter core, for detecting the temperature of the metal mesh dust filter core; The temperature controller is used to receive the temperature signal transmitted by the temperature sensor and control the voltage applied to the metal mesh dust filter element according to the temperature signal.

[0014] In a second aspect, the present invention also provides a heating method for the dust filter heating device, which uses a voltage applying device to directly apply voltage to both ends of the metal mesh dust filter core to achieve direct heating of the metal mesh dust filter core.

[0015] In a third aspect, the present invention further provides a dust filter, comprising the above-mentioned dust filter heating device.

[0016] In a fourth aspect, the present invention also provides a carbon-sulfur analyzer, comprising the above-mentioned dust filter.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The dust filter heating device provided by the present invention directly applies voltage to the metal mesh dust filter element through a voltage applying device. Since the filter element has a certain resistance, the electrical energy will be converted into thermal energy, resulting in an increase in the temperature of the filter element. This heating method is more direct and uniform, and has a good heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of a typical heating device at present; Figure 2 A schematic diagram of the structure of the heating device provided by the present invention; In the figure, 1. Metal mesh dust filter element; 2. Spring heater; 3. Support member; 4. Sealing ring groove; 5. Dust filter housing; 6. Transformer; 7. Conductive spring; 8. Temperature sensor; 9. Temperature controller. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 2 As shown, the present invention provides a dust filter heating device, comprising: Metal mesh dust filter element 1; The voltage applying device directly applies voltage to both ends of the metal mesh dust filter core 1 to achieve direct heating of the metal mesh dust filter core 1 .

[0023] The present invention directly applies voltage to the metal mesh dust filter core 1 through a voltage application device, thereby achieving direct heating of the metal mesh dust filter core 1, avoiding the existing indirect heating that causes the heated material (generally dust) to be far away, resulting in an indirect heating effect, and a higher temperature may be required to achieve a good heating effect.

[0024] In the present invention, the voltage applying device comprises: Transformer 6; Both ends of the metal mesh dust filter core 1 are elastically in contact with conductive springs 7 connected to the output end of the transformer 6 .

[0025] The present invention also includes: A temperature sensor 8, arranged on the metal mesh dust filter core 1, for detecting the temperature of the metal mesh dust filter core 1; Thermostat 9 is used to receive the temperature signal transmitted by the temperature sensor 8 and control the voltage applied to the metal mesh dust filter element 1 according to the temperature signal. Thermostat 9 is connected to the input end of the transformer 6, and the thermostat 9 is connected to the temperature sensor 8 through a signal transmission line or wirelessly. It can be selected according to actual needs.

[0026] The temperature sensor 8 is set to monitor the temperature of the metal mesh dust filter core 1 in real time, and the monitored real-time temperature signal is transmitted to the temperature controller 9. The temperature controller 9 determines whether the required heating temperature is met according to the received temperature signal, and controls the voltage applying device (transformer 6) to adjust the voltage applied to the metal mesh dust filter core 1. Closed-loop temperature control is achieved.

[0027] When the temperature is lower than the set value, the thermostat 9 will instruct the transformer 6 to increase the output voltage, thereby increasing the temperature of the metal mesh dust filter core 1; conversely, when the temperature is higher than the set value, the thermostat 9 will reduce the output voltage to lower the temperature. This automatic adjustment mechanism ensures that the temperature of the metal mesh dust filter core 1 is always maintained within the optimal working range, which not only ensures the filtration efficiency, but also avoids material damage that may be caused by overheating. In addition, the heating device of the present invention also has the characteristics of fast response speed and high control accuracy, and can quickly adapt to the temperature change requirements under different working conditions.

[0028] The present invention also provides a heating method for the dust filter heating device, which uses a voltage applying device to directly apply voltage to both ends of the metal mesh dust filter core 1 to achieve direct heating of the metal mesh dust filter core 1.

[0029] The present invention also provides a dust filter, comprising the above-mentioned dust filter heating device.

[0030] The present invention also provides a carbon-sulfur analyzer, comprising the above-mentioned dust filter.

[0031] The above are only preferred specific implementations of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dust filter heating device, characterized in that: include: Metal mesh dust filter element; A voltage applying device directly applies voltage to both ends of a metal mesh dust filter core to achieve direct heating of the metal mesh dust filter core.

2. A dust filter heating device according to claim 1, characterized in that: The voltage applying device comprises: transformer; Both ends of the metal mesh dust filter core are elastically in contact with conductive springs connected to the output end of the transformer.

3. The dust filter heating device according to claim 1, characterized in that: Also includes: A temperature sensor, disposed on the metal mesh dust filter core, for detecting the temperature of the metal mesh dust filter core; The temperature controller is used to receive the temperature signal transmitted by the temperature sensor and control the voltage applied to the metal mesh dust filter element according to the temperature signal.

4. A heating method for a dust filter heating device according to any one of claims 1 to 3, characterized in that: A voltage applying device is used to directly apply voltage to both ends of the metal mesh dust filter core to achieve direct heating of the metal mesh dust filter core.

5. A dust filter, characterized in that: The invention comprises a dust filter heating device according to any one of claims 1 to 3.

6. A carbon and sulfur analyzer, characterized in that: Includes a dust filter as described in claim 5.

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