CN201836065U

CN201836065U - Coal gas blower for coke oven

Info

Publication number: CN201836065U
Application number: CN201020503605XU
Authority: CN
Inventors: 王模明
Original assignee: TAIGANG GROUP LINFENG IRON AND STEEL CO Ltd; Xinlingang Iron & Steel Co Ltd
Current assignee: TAIGANG GROUP LINFENG IRON AND STEEL CO Ltd; Xinlingang Iron & Steel Co Ltd
Priority date: 2010-08-25
Filing date: 2010-08-25
Publication date: 2011-05-18
Anticipated expiration: 2020-08-25

Abstract

The utility model relates to coal gas conveying equipment for a coke oven, in particular to a coal gas blower for the coke oven and solves the problems that since the coal gas blower of the present coke oven uses an oil seal and self-priming air seal structure, coal gas at the combined part of a driving shaft and an end cover is easy to leak and the concentration of CO in a blower room of the coke oven often exceeds standard. The coal gas blower comprises an enclosure, the end cover and the driving shaft penetrating the case and the end cover, wherein a shaft sleeve and a wool felt are mounted on the driving shaft; the end cover, the enclosure, the wool felt and the shaft sleeve form an annular sealing cavity; and an air inlet channel communicated with the annular sealing cavity is arranged on the end cover. The utility model has the creative points that a nitrogen gas positive pressure pipe is connected with the air inlet channel in a sealing manner; and the other end of the nitrogen gas positive pressure pipe is communicated with a high-pressure nitrogen gas source. The coal gas blower has a simple structure and reasonable design; the leakage of the coal gas at the air seal part can be avoided; the concentration of CO in the blower room is below 24ppm; and the coke oven fan can run stably, has favorable improved effect and is especially suitable for iron steel production enterprises.

Description

The coke-stove gas blower

Technical field

The utility model relates to a kind of coke-stove gas conveying equipment, is specially a kind of coke-stove gas blower.

Background technique

Gas-blowing engine is mainly used in purposes such as the conveying, pressurization of coal gas, and is of many uses at coke-stove gas, coal gas of converter, calcium carbide flue gas industry.The oil gas mixture that comes out from coke oven is called raw coke oven gas, separates after the collection by coke oven gas fan, processing such as purification.Coke oven gas fan mainly is made up of casing, impeller, driving mechanism and motor, by casing inside and carry coal gas by the impeller rotation acting that driving mechanism drives, because the driving mechanism part is in the casing outside, contact with atmosphere, and the impeller part is housed in the casing inboard, contact with coal gas, this just requires, and the transmission shaft between the outside partly has very high sealing in casing.

Traditional transmission shaft sealing configuration is to cover at the axle end-blocking to have tank filler sleeve now, in the formed annular seal space of end cap, casing, wool felt and axle sleeve, form oil ring, on end cap, have simultaneously air intake passage, be communicated with the blower fan import, utilize the formed negative pressure of blower fan inlet, make and also be in negative pressure state in the annular seal space, this kind structure is self-priming sealing gland, in the fan operation process, the coal gas that can not be fully transmission shaft and end cap junction be oozed out all sucks blower fan by the negative pressure of inlet, has the defective of leakage gas.Industrial gas safety specification regulation: operating environment carbon monoxide MPC is 30mg/m ³(24ppm).

Because this kind blower fan axle envelope place gas leakage; CO concentration exceeds standard often in the coke oven blower fan machine room, reaches sometimes more than the 100ppm, is having a strong impact on the safety of personnel and unit; also very easily cause the chain shutdown of blower fan, thereby cause subsequent user because of the not enough danger of putting out a fire of coke-stove gas.

Summary of the invention

The utility model adopts oil sealing and self-priming air seal structure in order to solve existing coke-stove gas blower shaft envelope, has problems such as transmission shaft and end cap junction coal gas easily leak, the interior CO concentration of coke oven blower fan machine room exceeds standard often, and a kind of coke-stove gas blower is provided.

The utility model is to adopt following technological scheme to realize: the coke-stove gas blower, comprise casing, end cap and run through casing and the transmission shaft of end cap, axle sleeve, wool felt are housed on the transmission shaft, end cap, casing, wool felt and axle sleeve form annular seal space, have the air intake passage that connects with annular seal space on the end cap, innovative point of the present utility model is that the sealing of air intake passage place is connected with the positive pressure of nitrogen pipe, and the positive pressure of nitrogen pipe the other end is communicated with the elevated pressure nitrogen source of the gas.

The utility model is particularly useful for steel production enterprise, utilize the intrinsic nitrogen system of iron and steel enterprise as elevated pressure nitrogen source of the gas of the present utility model, because nitrogen pressure is far above gas pressure, the nitrogen of elevated pressures enters in the annular seal space from air intake passage, form the nitrogen-sealed compression ring, just coal gas can be enclosed in the casing.

Compared with prior art, coke oven gas fan described in the utility model provides forced seal with choke (nitrogen), the energy detected air pressure, and guarantee that air pressure is adjusted to the internal pressure of blower constantly, therefore Sealing only bears required excess pressure, improve simple in structure, reasonable in design, the sealing gland place is leakage gas no longer, and CO concentration is below 24ppm in the machine room, and the coke oven fan operation is stable, correctional effect is good, be particularly useful for steel production enterprise, investment cost is less, obtains bigger safety and economic benefit with a spot of energy and material.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Among the figure: the 1-casing; The 2-end cap; The 3-transmission shaft; The 4-axle sleeve; The 5-wool felt; The 6-annular seal space; The 7-air intake passage; 8-positive pressure of nitrogen pipe; 9-elevated pressure nitrogen source of the gas.

Embodiment

The coke-stove gas blower, as shown in Figure 1, comprise casing 1, end cap 2 and run through casing and the transmission shaft of end cap 3, axle sleeve 4, wool felt 5 are housed on the transmission shaft 3, end cap 2, casing 1, wool felt 5 and axle sleeve 4 form annular seal space 6, have the air intake passage 7 that connects with annular seal space 6 on the end cap 2, the sealing of air intake passage 7 places is connected with positive pressure of nitrogen pipe 8, and positive pressure of nitrogen pipe 8 the other ends are communicated with elevated pressure nitrogen source of the gas 9.The same with existing gas-blowing engine structure, also comprise parts such as driving mechanism and motor.

The elevated pressure nitrogen source of the gas can cause nitrogen by the blower by equipment such as valve, steel pipe, reduction valve, at positive pressure of nitrogen Guan Shangke a series of valves are installed and are used to control nitrogen flow, also but the setting pressure table detects nitrogen pressure immediately, guarantees that its pressure is higher than gas pressure.In the practical application of iron and steel enterprise, can be with nitrogen pressure by 0.6MPa through transferring to behind the reduction valve about 45KPa, be that the coal gas of 7KPa is enclosed in the casing with operating pressure.

Claims

1. coke-stove gas blower, comprise casing (1), end cap (2) and run through casing and the transmission shaft of end cap (3), axle sleeve (4), wool felt (5) are housed on the transmission shaft (3), end cap (2), casing (1), wool felt (5) and axle sleeve (4) form annular seal space (6), have the air intake passage (7) that connects with annular seal space (6) on the end cap (2), it is characterized in that air intake passage (7) locate the sealing be connected with positive pressure of nitrogen pipe (8), positive pressure of nitrogen pipe (8) the other end is communicated with elevated pressure nitrogen source of the gas (9).