CN220392609U - Automatic negative pressure conveying system of tonifying qi - Google Patents

Abstract

The utility model discloses a negative pressure conveying system capable of automatically supplementing air, which comprises a conveying pipe, an automatic air supplementing valve, a cyclone dust collector, an ash bin and a negative pressure fan, wherein the front end of the conveying pipe is provided with the automatic air supplementing valve, the rear end of the conveying pipe is communicated with an air inlet of the cyclone dust collector, an air outlet of the cyclone dust collector is communicated with an input end of the negative pressure fan, an output end of the negative pressure fan is communicated with a flue gas inlet of the dust collector, an ash outlet of the cyclone dust collector is communicated with the ash bin, a connecting port communicated with an ash hopper of the dust collector is arranged on the conveying pipe, and the automatic air supplementing valve comprises a baffle plate.

Description

Automatic negative pressure conveying system of tonifying qi

[ field of technology ]

The utility model relates to the technical field of dust removing equipment, in particular to the technical field of a negative pressure conveying system capable of automatically supplementing air.

[ background Art ]

The negative pressure system is a conveying system for pumping the powder and particle materials uniformly mixed with air at the material receiver to the material storage device through a pipeline by utilizing a negative pressure of a system generated by a pressure fan (vacuum pump), and is mainly used for an ash treatment system of a coal-fired power plant, which is also called as a negative pressure pneumatic ash removal system.

The negative pressure system is usually composed of an air compensating valve (a pneumatic butterfly valve), a conveying pipeline, ash-gas separation equipment, an ash storage warehouse, auxiliary equipment, a negative pressure fan, a control system and the like, wherein the air compensating valve is arranged at the air compensating end of the conveying pipeline, when the vacuum value of the air inlet end of a conveying branch pipe is too high due to the too high concentration in the conveying pipeline, the air compensating valve is opened, and a proper amount of air is supplemented to dilute the too high material concentration so as to prevent the occurrence of pipe blockage. The type of the air supplementing valve is correspondingly larger, the valve plate of the valve body is in sliding friction in the opening and closing process, abrasion is easy to occur, the price of the valve is higher, and therefore the valve is high in use cost and short in service life. In addition, the opening and closing of the pneumatic butterfly valve can not be automatically controlled, so that the flow velocity of the ash-gas mixture in the pipeline is high, and the pipeline is worn.

[ utility model ]

The utility model aims to solve the problems in the prior art and provides an automatic air supplementing negative pressure conveying system which can reduce the use cost, prolong the service life and automatically control the opening size.

In order to achieve the above purpose, the utility model provides an automatic air supplementing negative pressure conveying system, which comprises a conveying pipe, an automatic air supplementing valve, a cyclone dust collector, an ash bin and a negative pressure fan, wherein the front end of the conveying pipe is provided with the automatic air supplementing valve, the rear end of the conveying pipe is communicated with an air inlet of the cyclone dust collector, an air outlet of the cyclone dust collector is communicated with an input end of the negative pressure fan, an output end of the negative pressure fan is communicated with a flue gas inlet of the dust collector, an ash discharging port of the cyclone dust collector is communicated with the ash bin, a connecting port communicated with an ash hopper of the dust collector is arranged on the conveying pipe, the automatic air supplementing valve comprises a baffle plate, a plurality of through holes are formed in the baffle plate, mounting plates are arranged at the front ends of the through holes, threaded rods are respectively arranged on the mounting plates in a penetrating mode, valve plates for blocking the through holes are respectively arranged at the rear ends of the threaded rods, nuts are respectively arranged at the front ends of the threaded rods, and springs are respectively sleeved on the threaded rods between the nuts and the mounting plates.

Preferably, the connecting ports are communicated with the corresponding ash hoppers through an electric feeder I.

Preferably, the input end of the electric feeder I is communicated with the ash bucket through a manual valve.

Preferably, the ash discharge port of the cyclone dust collector is communicated with the ash bin through an electric feeder II.

Preferably, the lower end of the ash bin is a conical part with a large upper part and a small lower part.

Preferably, the lower end and one side of the conical part are respectively provided with an ash discharge opening, and the ash discharge openings are respectively provided with an ash discharge valve.

The utility model has the beneficial effects that: under the action of negative pressure, the valve plate moves backwards, the valve plate drives the nut to compress the spring through the screw rod, automatic opening and air supplementing are realized, the cost of the valve is low, and the valve plate is adjusted to move forwards and backwards due to the fact that sliding friction phenomenon exists between the valve plate and the baffle plate; in addition, through the cooperation of the elasticity effect of spring, realize the valve plate according to the size of negative pressure effort automatic adjustment opening amount's size, rational control air make-up volume, adjust the velocity of flow, reduce the wearing and tearing to ash conveying pipeline. Compared with the prior art, the automatic control device can reduce the use cost, prolong the service life and automatically control the opening size.

Dust-containing gas output by the negative pressure fan returns to the dust remover again, dust in the dust-containing gas is attached to larger particles in the flue gas, and when the dust passes through the cyclone dust remover, the dust-containing gas enters the dust bin along with the larger particles, so that the environmental pollution is reduced.

The features and advantages of the present utility model will be described in detail by way of example with reference to the accompanying drawings.

[ description of the drawings ]

FIG. 1 is a schematic diagram of a negative pressure delivery system with automatic air supply according to the present utility model;

FIG. 2 is a cross-sectional view of an automatic air make-up valve;

fig. 3 is a schematic diagram of a second embodiment.

In the figure: 1-conveying pipe, 2-automatic air compensating valve, 3-cyclone dust collector, 4-ash bin, 5-negative pressure fan, 6-connector, 7-electric feeder I, 8-ash bucket, 9-electric feeder II, 10-taper part, 11-ash discharging opening, 12-ash discharging valve, 13-manual valve, 21-baffle, 22-through hole, 23-mounting plate, 24-screw, 25-spring, 26-nut and 27-valve plate.

[ detailed description ] of the utility model

Example 1

Referring to fig. 1 and 2, the negative pressure conveying system for automatic air supplementing comprises a conveying pipe 1, an automatic air supplementing valve 2, a cyclone dust collector 3, an ash bin 4 and a negative pressure fan 5, wherein the front end of the conveying pipe 1 is provided with the automatic air supplementing valve 2, the rear end of the conveying pipe 1 is communicated with an air inlet of the cyclone dust collector 3, an air outlet of the cyclone dust collector 3 is communicated with an input end of the negative pressure fan 5, an output end of the negative pressure fan 5 is communicated with a flue gas inlet of the dust collector, an ash discharge port of the cyclone dust collector 3 is communicated with the ash bin 4, a connecting port 6 communicated with an ash hopper 8 of the dust collector is arranged on the conveying pipe 1, the automatic air supplementing valve 2 comprises a baffle 21, a plurality of through holes 22 are formed in the baffle 21, a mounting plate 23 is arranged at the front end of the through holes 22, a screw 24 is penetrated through the mounting plate 23, a valve plate 27 for plugging the through holes 22 is arranged at the rear end of the screw 24, nuts 26 are respectively arranged at the front ends of the screw 24, a spring 25 is sleeved on the screw 24 between the nuts 26 and the screw 23, an electric connecting port 25 is respectively arranged at the lower end of the screw 24 and the electric hopper 8 and the ash hopper 8 and is communicated with the ash hopper 11, and the lower end of the ash hopper 11 is communicated with the ash hopper 11 through the electric hopper 4, and the electric hopper 7 is communicated with the lower end of the ash hopper 11 through the electric hopper, and the electric hopper 11, and the electric hopper is communicated with the ash hopper 11, and the lower end is provided with the ash hopper 11, and the ash hopper is communicated with the ash hopper 11, and the ash hopper is respectively, and the lower end is communicated with the ash hopper through the ash hopper and the ash has the ash and the ash through the ash has the ash and the ash.

Example two

Referring to fig. 3, the number of the through holes 22 is three.

The working process of the utility model comprises the following steps:

in the working process of the negative pressure conveying system for automatic air supplementing, powder and particle materials in an ash bucket 8 are conveyed into a connecting port 6 through an electric feeder I7 and then enter a conveying pipe 1, the powder and particle materials enter a cyclone dust collector 3 under the action of a negative pressure fan 5, the powder and particle materials in the cyclone dust collector 3 are conveyed into an ash bin 4 through an electric feeder II9, and dust-containing flue gas output by the cyclone dust collector 3 enters a flue gas inlet of the dust collector through the negative pressure fan 5.

When the automatic air compensating valve 2 works, the valve plate 27 moves backwards under the action of negative pressure, and the valve plate 27 drives the nut 26 to compress the spring 25 through the screw 24, so that automatic air compensating opening is realized.

The above embodiments are illustrative of the present utility model, and not limiting, and any simple modifications of the present utility model fall within the scope of the present utility model.

Claims (6)

1. An automatic negative pressure conveying system of tonifying qi, its characterized in that: including conveying pipeline (1), automatic air compensating valve (2), cyclone (3), ash bin (4) and negative pressure fan (5), the front end of conveying pipeline (1) is equipped with automatic air compensating valve (2), the rear end of conveying pipeline (1) communicates with the air inlet of cyclone (3), the gas outlet of cyclone (3) communicates with the input of negative pressure fan (5), the output of negative pressure fan (5) communicates with the flue gas inlet of dust remover, the ash discharge mouth of cyclone (3) communicates with ash bin (4), be equipped with on conveying pipeline (1) with ash bucket (8) of dust remover intercommunication connector (6), automatic air compensating valve (2) are including baffle (21), be equipped with a plurality of through-holes (22) on baffle (21), baffle (21) all are equipped with mounting panel (23) at the front end of through-hole (22), all wear to be equipped with screw (24) on mounting panel (23), the rear end of screw (24) all is equipped with the flue gas inlet intercommunication that is used for through-hole (22), valve plate (24) and ash bin (24) communicate, be equipped with connector (6) with screw (26) with screw (24) on the front end (26) of shutoff nut (24).

2. An automatic air make-up negative pressure delivery system as set forth in claim 1, wherein: the connecting ports (6) are communicated with the corresponding ash hoppers (8) through the electric feeder I (7).

3. An automatic air make-up negative pressure delivery system as claimed in claim 2, wherein: the input end of the electric feeder I (7) is communicated with the ash bucket (8) through a manual valve (13).

4. An automatic air make-up negative pressure delivery system as set forth in claim 1, wherein: the ash discharge port of the cyclone dust collector (3) is communicated with the ash bin (4) through an electric feeder II (9).

5. An automatic air make-up negative pressure delivery system as set forth in claim 1, wherein: the lower end of the ash bin (4) is a conical part (10) with a large upper part and a small lower part.

6. An automatic air make-up negative pressure delivery system as set forth in claim 5, wherein: the lower end and one side of the conical part (9) are both provided with an ash discharge opening (11), and the ash discharge opening (11) is provided with an ash discharge valve (12).