Tube-type reflux cooler

Abstract

The invention relates to the annealing furnace atmosphere monitoring field, and especially relates to an atmosphere sampling device. A sleeve-type reflux cooler comprises a shell body and an atmosphere cooling mechanism; the atmosphere cooling mechanism is arranged in the middle part of the shell body; the bottom of the shell body is provided with a drainage port; the top of the shell body is communicated with an atmosphere detector through a gas outlet pipeline; the drainage port is connected with a detection port of an annealing furnace through a reflux pipe; an atmosphere inlet is arranged below the middle part of the shell body and is connected with the detection port of the annealing furnace through a sample gas sampling pipeline; one section, close to the annealing furnace, of the sample gas sampling pipeline is sleevedly mounted in the reflux pipe; the height of the drainage port is higher than that of the detection port of the annealing furnace. Sections, close to the annealing furnace, of the sample gas sampling pipeline and the reflux pipe are arranged in a sleeve mode, so that not only can the separation effect be improved, but also condensed water can be allowed to be immediately gasified when flowing back into the furnace, the influence on the precision of the annealing atmosphere is avoided, and the sleeve-type reflux cooler has the advantages of energy saving, emission reduction, cost decreasing and benefit increasing.

Description

technical field [0001] The invention relates to the field of annealing furnace atmosphere monitoring, in particular to an atmosphere sampling device. Background technique [0002] Some plate products in the iron and steel metallurgy industry need to be heat treated in a continuous annealing furnace with a protective atmosphere. Since the monitoring of the annealing process needs to ensure safe production at the same time, it is necessary to monitor the pressure of the furnace atmosphere, gas concentration and other parameters in real time. Commonly used The atmosphere detection or furnace pressure detection system is to connect the sampling pipe from the furnace to the detector, and the exhaust gas after detection is discharged into the atmosphere through the exhaust pipe. According to the actual situation, the detection system is also equipped with a purging device, an air pump, and a dust removal system. and other accessories, the annealing furnace of a continuous unit of ...

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Problems solved by technology

[0003] 1) The high-humidity gas is cooled from about 800°C to 130°C in a section of pipeline from the furnace to the inlet of the detector. During this cooling process, a large amount of water condensed stays in the pipeline and cannot be removed in time, causing the detection pipeline to be damaged. Blockage and detection value fluctuations will cause automatic shutdown of the annealing furnace in severe cases, which will affect safe production

[0004] 2) If the sampling pipeline is coated with thermal insulation material, although moisture condensation can be reduced, the high sample temperature will affect the measurement accuracy and cause damage to the analysis instrument, which increases the production cost and brings troubles to manual maintenance

[0005] 3) The current common water vapor separation devices are basically baffle-type structures with complex structural designs. Through a large number of welding, casting and other processing techniques, the cost is high and the separation efficiency is low. The pressure drop during the separation process is obvious, and it is not suitable for installation in Sampling and detection pipe network for protective gas of continuous annealing furnace

[0006] 4) Since the annealing furnace is a hydrogen-rich atmosphere, the detected gas and the condensed water contain a large amount of hydrogen, and there is a serious safety hazard in the direct design of the discharge into the atmosphere

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