Smoke dust and smoke sampling device

Abstract

A smoke dust and smoke sampling device comprises a sampling inner tube (1), a cooling middle tube (2) and a cooling outer tube (3).A sealed two-layer tubular sleeve type structure is formed outside the sampling inner tube by the cooling outer tube and the cooling middle tube in an enclosing mode, the sampling inner tube penetrates through the cooling middle tube, and the cooling middle tube is embedded in the cooling outer tube in a sleeved mode.According to the sampling device, the space between the outer tube and the middle tube and the space between the middle tube and the inner tube can be filled with cooling water, and therefore deformation, caused by high temperature in a metallurgical furnace, of a sampling rod cannot occur; the cooling water enters the sampling device from the portion, located below the closed end of the cooling middle tube, of the cooling outer tube and flows out of the upper portion of the closed end of the cooling middle tube, and the cooling water can be rapidly drained after being heated, so that a sample is rapidly cooled, maintaining of an original phase is benefited, and subsequent analytical research is convenient; smoke dust and smoke are cooled by the cooling water in a sampling head, a filter screen is vertically arranged in the sampling head, and smoke dust collection is convenient; the cooling outer tube and the sampling inner tube are each internally provided with a disassembly and assembly part capable of being flexibly disassembled and assembled, and the sampling head can be flexibly disassembled and replaced.

Description

technical field [0001] The invention relates to flue gas sampling equipment, in particular to a flue dust and flue gas sampling device. Background technique [0002] In order to accurately determine the composition of the dust and flue gas produced in the metallurgical process, it is necessary to extract the dust and flue gas samples from the metallurgical boiler. However, a violent smelting reaction is going on in the boiler, forming a high temperature above 1000°C, which brings great difficulties to the sampling of smoke and flue gas. [0003] Existing high-temperature dust and flue gas sampling devices are generally water-curtain samplers and water-cooled samplers: the water-curtain sampler is composed of a casing, a water nozzle, and a collection tank. Water flows through the casing, and flows out from the water nozzle above the collection tank to form a water curtain. The smoke flows through the water curtain, and the smoke and dust in it are captured by the water curt...

AI Technical Summary

Problems solved by technology

However, there is a lot of dust in the metallurgical boiler, and the sampling device is not equipped with any dust blocking parts. If it is directly used to sample the flue gas in the metallurgical boiler, not only will the dust content of the sampled flue gas be high, but it will also easily lead to The inner pipe is blocked by smoke and dust

In addition, the arrangement of the water-cooling pipes in the device is not reasonable

The water inlet pipe goes deep into the front end of the outer pipe, and the outlet pipe head is set in the middle of the rear end of the outer pipe. This arrangement will easily cause the cooling water to fail to fill the space between the outer pipe and the inner pipe, resulting in poor cooling effect.

[0005] In addition, Chinese patent 201120449605.0 discloses a high-temperature flue gas water-cooled jacket sampler, including a circulating water outer casing welded into a closed circulating water jacket, a circulating water inner pipe, a circulating water inner casing, a water inlet pipe, and a water outlet pipe. Among them, the iron slag is filled between the sampling pipe and the circulating water inner casing, and the outer wall of the sampling pipe is not in direct contact with the water. Therefore, this scheme may lead to insufficient cooling of the flue gas when the sampling flue gas flow rate is large. In addition, in this scheme, the water inlet pipe is connected to the inner pipe of circulating water, and the outlet pipe is connected to the outer pipe of circulating water. The water entering the inner pipe of circulating water through the water inlet pipe will first flow into the outer pipe of circulating water due to gravity Among them, the water flow path after the entire water-cooling jacket is filled with water is: from the water inlet pipe to one end of the circulating water inner pipe, to the other end of the circulating water inner pipe, and then to the end of the circulating water outer pipe connected to the outlet pipe. The outer wall of the outer casing is also in direct contact with the high-temperature flue gas. In this scheme, the path required for cooling water to enter the outer casing of the circulating water is long, so that the cooling effect of the outer wall of the outer casing of the circulating water is not good, and it is easy to be deformed by the high-temperature flue gas.

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