Efficient large cyclone separation device and efficient separation method thereof

Abstract

The invention discloses an efficient large cyclone separation device and an efficient separation method thereof. The device comprises a dusty gas inlet pipe (1), a main gas inlet pipe (2), a large main cyclone separator (3), a circulation gas inlet pipe (4), a small secondary cyclone separator (5), a fan (6), a flow meter (7), an adjusting valve (8), and a circulation gas outlet pipe (9). The large main cyclone separator (3) comprises a cyclone volute inlet (31), a cyclone outlet (32), a top plate (33), a cyclone cylinder (34), a cyclone outer cone body assembly (35), a cyclone inner cone bodyassembly (36), a middle ash bucket (37), a discharging opening (38), a circulation gas outlet (39) and a vortex-stabilized gas producer (310). According to the device, the separation efficiency and the dust collection efficiency of the cyclone separator can be effectively improved, and meanwhile resistance can be reduced.

Description

technical field [0001] The invention relates to a gas-solid separation and gas-liquid separation equipment and method, in particular to a high-efficiency large-scale cyclone separation device and a high-efficiency separation method. Background technique [0002] Cyclone separator has been widely used in chemical industry, petroleum, environmental protection, food, etc. In the industrial field, it can be said that it is irreplaceable for a long time in the field of heterogeneous phase separation. Although the cyclone separator has a simple structure, its internal motion is extremely complex, belonging to two-phase or three-phase three-dimensional turbulent flow, which makes its theoretical research very difficult, and its accurate motion law has not been fully grasped so far. [0003] According to the current research theory, in addition to the main swirl flow (including inner swirl flow and outer swirl flow) inside the cyclone separator, the secondary vortex flow generally ...

AI Technical Summary

Problems solved by technology

But this invention has the following defects: 1) The structure in which the inlet pipe of the back-stage cyclone separator is arranged inside the cone of the front-stage cyclone separator will seriously interfere with the inherent main swirl flow inside the cone of the front-stage cyclone separator ( Including internal swirling flow and external swirling flow) flow field, resulting in a significant reduction in the efficiency of the pre-cyclone separator; 2) Due to the existence of the inlet pipe of the post-stage cyclone separator, the dust discharge channel inside the pre-stage cyclone separator is reduced, which is very easy to produce The discharge port is blocked due to dust bridging, which leads to the failure of the front-stage cyclone separator; 3) Since the gas extraction position of the inlet pipe of the back-stage cyclone separator is at the bottom of the cone of the front-stage cyclone separator, the existing theoretical and measured values All prove that this is the "negative pressure zone" of the flow field inside the cyclone, where the pressure in the "negative pressure zone" is generally lower than the pressure at the total outlet of the cyclone, and there is still a certain resistance in the post-cyclone separator itself, namely There is a "reverse flow" of the internal gas of the post-stage cyclone separator, and there is no power (fan) to drive, so it cannot guarantee that the post-stage cyclone separator can have a certain separation efficiency, and the industrial application value is low

This patent application for the invention has the following defects: 1) The draft tube is arranged in the center of the separator and inserted into the ash bin, and the bottom of the draft tube directly extracts the gas in the ash bin, because the air flow in the ash bin is entrained with high concentration The solid dust is rotating, and the closer to the wall of the ash bin, the higher the concentration, but this direct extraction method will destroy the swirling flow field of the gas in the ash bin, resulting in the relatively high concentration of solid dust being directly guided out by the draft tube , refer to its instruction manual, it is obviously problematic to lead directly out of the separator (discharge), such as re-introducing the inlet of the separator will increase the "back-mixing" of the separator, because this part of the solid dust is already collected in the ash bin

2) Referring to the accompanying drawings, the draft pipe may be reintroduced into the separator inlet, but there is no description in the document for the specific implementation method, and the draft pipe needs to be driven by power (fan) to extract the gas in the ash bin. Theoretical and measured values ​​have proved that the cyclone inlet pressure is higher than the gas pressure in the ash bin, and this patent application cannot achieve the above-mentioned purpose of diverting the gas

3) There is no adjustment and metering scheme for the gas drawn out of the draft tube, and the real flow rate of the guided gas cannot be known, so it is difficult to verify the separation effect that can actually be improved

The disadvantage of this invention patent application is that it can only stabilize the cyclone efficiency but cannot improve the cyclone efficiency. In addition, due to the high level of automation, the investment cost of its equipment is also slightly higher.

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