CN202765845U

CN202765845U - Pneumatic dust conveying device

Info

Publication number: CN202765845U
Application number: CN 201220501081
Authority: CN
Inventors: 何强
Original assignee: CINF Engineering Corp Ltd
Current assignee: CINF Engineering Corp Ltd
Priority date: 2012-09-27
Filing date: 2012-09-27
Publication date: 2013-03-06
Anticipated expiration: 2022-09-27

Abstract

The utility model discloses a pneumatic dust conveying device which comprises an expansion joint, a chamber pump, a pressure relief pipe and an overbottom pressure dust bucket with a dust seal. The expansion joint and the pressure relief pipe are respectively communicated with the top of the chamber pump, the overbottom pressure dust bucket is communicated with the chamber pump through the pressure relief pipe, a vacuum relief valve and a bag type dust collector are mounted at the top of the overbottom pressure dust bucket, and a gravity flap valve for dust discharge is mounted at the bottom of the overbottom pressure dust bucket. The overbottom pressure dust bucket is added on the basis of an existing pneumatic dust conveying device, compressed air in the chamber pump is conveyed into the overbottom pressure dust bucket for pressure relief to enable the chamber pump to meet the dust conveying requirements of a coal gas system while the compressed air serves as a dust conveying medium, and accordingly oxygen content of coal gas is increased. Dust collected by a purifying device can be safely and effectively conveyed to a dust storage without using nitrogen for conveying dust, energy conservation and easiness in implementation are realized, and investment and operation cost are saved.

Description

Pneumatic ash conveying plant

Technical field

The utility model relates to a kind of gas cleaning device, relates in particular to a kind of pneumatic ash conveying plant.

Background technology

Existing steel mill, ferroalloy works etc. generally are provided with gas recovering device, and gas cleaning device also is installed on gas recovering device simultaneously, and this clean-up device mainly is the dust of collecting in the coal gas.The dust of generally collecting through clean-up device adopts two kinds of mode of movements to be delivered to grey storehouse.During close together, adopt mechanical mode of movement, when distant, adopt nitrogen to carry.Existing employing nitrogen (unreactable gas) ash conveying device (as shown in Figure 2), comprise the manually gate valve A that connects successively, expansion joint B, electric lorry air valve C and storehouse pump D, the other end of manually gate valve A is connected with clean-up device ash bucket bottom, pump D top, storehouse is communicated with grey storehouse by ash pipe, between clean-up device ash bucket and storehouse pump D, also be connected with a storehouse pump relief tube E, the operational process of its Pneumatic ash conveying is as described below: dry ash flows out from clean-up device ash bucket bottom, through manual gate valve A, expansion joint B, electric lorry air valve C enters storehouse pump D, and nitrogen is from the input of storehouse pump D bottom.Dry ash mixes with pressurized air in the pump D of storehouse, makes dry ash be suspended state, and directly squeezes into Hui Ku through ash pipeline.Before Pneumatic ash conveying enters the next defeated ash cycle, nitrogen remaining in the pump of storehouse need be drained into the ash bucket under the clean-up device, to the residual air pressure release of storehouse pump, enter smoothly the storehouse pump with the ash that guarantees ash bucket.

Can avoid air to enter into coal gas although adopt nitrogen to carry, not increase the level of oxygen in the coal gas, reduce the possibility of gas explosion, need to arrange nitrogen-making device, therefore need in a large amount of fund of early investment, make the ash-transmission system over-the-road expense high.

The utility model content

The purpose of this utility model be to provide a kind of in coal gas system, do not need to adopt nitrogen carry dry ash pneumatic ash conveying plant.

This pneumatic ash conveying plant that the utility model provides, comprise expansion joint, storehouse pump and relief tube, described expansion joint and relief tube are communicated with the top of storehouse pump respectively, also comprise an overbottom pressure ash bucket that has produced the ash envelope, described overbottom pressure ash bucket is communicated with the storehouse pump by relief tube, at the top of described overbottom pressure ash bucket vacuum release valve and bag dust collector are installed, are installed in the bottom of this overbottom pressure ash bucket and unload ash gravity flap valve.

In order to make the storehouse pump reach better ash envelope effect, prevent that pressurized air from entering in the ash bucket of clean-up device, the utility model also comprises screw feeder, described screw feeder is connected between expansion joint and the storehouse pump.

In order to make coal gas not to outward leakage, the pressurized air in the time of guaranteeing again defeated ash is not simultaneously played a reversed role to coal gas, is provided with heat indicator at described overbottom pressure ash bucket.

The utility model is to set up an overbottom pressure ash bucket on the basis of existing pneumatic ash conveying plant, by with the pressure release to the overbottom pressure ash bucket of the compressed air delivery in the pump of storehouse, so that the storehouse pump can be in the situation that adopt pressurized air as defeated grey medium, satisfy the defeated grey requirement in coal gas system, thereby avoid increasing the level of oxygen in the coal gas.The utility model can not need adopt the mode of the defeated ash of nitrogen, can be safely, the dust effectively clean-up device collected is delivered to grey storehouse, and energy savings, and be easy to realize, saved investment and over-the-road expense.

Description of drawings

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

Fig. 2 is the structural representation of prior art.

The specific embodiment

As can be seen from Figure 1, this pneumatic ash conveying plant that the utility model provides, comprise manually gate valve 1, expansion joint 2, screw feeder 3, storehouse pump 4, relief tube 5, overbottom pressure ash bucket 6, vacuum release valve 7, bag dust collector 8, unload ash gravity flap valve 9, ash pipeline and Hui Ku, be provided with heat indicator at overbottom pressure ash bucket 6, manually gate valve 1 one ends are connected with clean-up device ash bucket bottom, one end is connected with screw feeder 3 by expansion joint 2, screw feeder 3 other ends are communicated with the top of storehouse pump 4, overbottom pressure ash bucket 6 has produced the ash envelope and has been communicated with the top of storehouse pump 4 by relief tube 5, vacuum release valve 7 and bag dust collector 8 are installed in the top of overbottom pressure ash bucket 6, unload the grey bottom that is installed in overbottom pressure ash bucket 6 with gravity flap valve 9, grey storehouse is communicated with storehouse pump 4 tops by ash pipeline.

Pneumatic ash conveying process of the present utility model is as follows: dry ash flows out from clean-up device ash bucket bottom, enters the storehouse pump through manual gate valve, expansion joint, screw feeder, and pressurized air enters from storehouse pump bottom.Dry ash mixes with pressurized air in the pump of storehouse, makes dry ash be suspended state, and directly squeezes into Hui Ku through ash pipeline.Most of dry ash directly falls into grey storehouse, and a small amount of thin ash enters the bag dust collector that is installed on top, grey storehouse with weary gas, and thin ash is collected and again falls into grey storehouse, and clean air directly enters atmosphere.Before Pneumatic ash conveying enters the next defeated ash cycle, residual air in the storehouse pump 4 is delivered in the overbottom pressure ash bucket 6 by relief tube 5, be storehouse pump pressure release, the thin ash of residual air is collected by bag dust collector 8, fall into ash bucket through unloading ash with gravity flap valve 9, clean air directly enters atmosphere through vacuum release valve 7.By the heat indicator that arranges on the overbottom pressure ash bucket 6, different according to gas temperature temperature of ash when depositing ash, judge the height of grieshoch, make the 6 interior maintenances of overbottom pressure ash bucket have a certain amount of ash and produce the ash envelope, guarantee that defeated ash normally moves.

Claims

1. pneumatic ash conveying plant, comprise expansion joint (2), storehouse pump (4) and relief tube (5), described expansion joint (2) and relief tube (5) are communicated with the top of storehouse pump (4) respectively, it is characterized in that: also comprise an overbottom pressure ash bucket (6) that has produced the ash envelope, described overbottom pressure ash bucket (6) is communicated with storehouse pump (4) by relief tube (5), vacuum release valve (7) and bag dust collector (8) are installed at the top of described overbottom pressure ash bucket (6), are installed in the bottom of this overbottom pressure ash bucket (6) and unload ash gravity flap valve (9).

2. pneumatic ash conveying plant according to claim 1, it is characterized in that: also comprise screw feeder (3), described screw feeder (3) is connected between expansion joint (2) and the storehouse pump (4).

3. pneumatic ash conveying plant according to claim 1 and 2 is characterized in that: be provided with heat indicator at described overbottom pressure ash bucket (6).