CN213419382U

CN213419382U - Coal-fired power plant desulfurization slurry circulating pump impeller prosthetic devices

Info

Publication number: CN213419382U
Application number: CN202021671654.4U
Authority: CN
Inventors: 吴至敏
Original assignee: Shanghai Jingyuan Environmental Protection Engineering Co ltd
Current assignee: Shanghai Jingyuan Environmental Protection Engineering Co ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-06-11
Anticipated expiration: 2030-08-12

Abstract

The utility model discloses a coal-fired power plant desulfurization slurry circulating pump impeller prosthetic devices, including the pump body, can dismantle on the pump body and be connected with the pump cover, the pump body is through combining the board fixedly connected with bracket, be equipped with the impeller in the pump body, impeller fixed mounting is in the one end of rotation axis, the other end of rotation axis stretches out pump body and bracket, the cover is equipped with the axle sleeve on the rotation axis between pump body and bracket, seal through mechanical seal spare between axle sleeve and the pump body, rotation axis drive impeller high-speed rotation, in order to drive the thick liquid incessantly by the suction and extrusion, this kind of device scribbles the compound ceramic polymer material of SiCOat on the pump body, the front sheath, the back sheath, impeller and front guard plate, can improve its wearability and prolong life, repair the back part surface smooth, reduce the damage of medium vortex impact to the pump body overflowing parts, the repair is very simple, and spare parts such as the impeller can be repeatedly used.

Description

Coal-fired power plant desulfurization slurry circulating pump impeller prosthetic devices

Technical Field

The utility model relates to a desulfurization slurry circulating pump technical field specifically is a coal fired power plant desulfurization slurry circulating pump impeller prosthetic devices.

Background

In the limestone-gypsum wet flue gas desulfurization device of the coal-fired power plant, the slurry circulating pump of the absorption tower is key equipment and is known as the heart of the device operation, so the operation reliability of the slurry circulating pump of the absorption tower becomes the key of the normal operation of the device. The main function of the absorption tower is to continuously circulate the slurry in the absorption tower, so that the sulfur dioxide in the flue gas is completely absorbed.

The slurry circulating pump is one of the vulnerable parts, mainly corroded, abraded and cavitated by slurry, the service life of the impeller of the rotor overflowing part of the common slurry circulating pump is about two years, and the cost of replacing the impeller is high and the period is long. The desulfurization operation cost of a common power plant is high, equipment is used for recycling, and cost saving is a link which cannot be neglected, so that the repair and the reuse of a slurry circulating pump are trended.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a coal fired power plant desulfurization slurry circulating pump impeller prosthetic devices to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a coal-fired power plant desulfurization slurry circulating pump impeller repairing device comprises a pump body, wherein a pump cover is detachably connected to the pump body, a front sheath and a rear sheath are installed on the pump body, the pump body is fixedly connected with a bracket through a combination plate, an impeller is arranged in the pump body, the impeller is fixedly installed at one end of a rotating shaft, the other end of the rotating shaft extends out of the pump body and the bracket, a shaft sleeve is sleeved on the rotating shaft between the pump body and the bracket, the shaft sleeve and the pump body are sealed through a mechanical sealing element, a front protection plate is further arranged on the pump body, and the rotating shaft drives the impeller to rotate at a high speed so as to drive slurry to;

the utility model provides a coal fired power plant desulfurization slurry circulating pump impeller prosthetic devices, still includes the compound ceramic macromolecular material of SiCOAT, the compound ceramic macromolecular material of SiCOAT evenly coats on the pump body, preceding sheath, back sheath, impeller and preceding backplate.

Furthermore, a suction cover for sucking the slurry is arranged on the pump body.

Furthermore, the pump body is provided with a discharge port for discharging the slurry under high pressure.

Further, the rotating shaft is connected to an output end of the driving motor, so that the driving motor drives the rotating shaft to rotate.

Compared with the prior art, the beneficial effects of the utility model are that:

1. when the device is used, the liquid among the blades is driven to rotate together by the high-speed rotation of the impeller, the liquid is thrown from the center of the impeller to the outer edge of the impeller under the action of centrifugal force, the kinetic energy is increased, when the liquid enters the pump body, the flow channel in the pump body is gradually enlarged, the flow speed of the liquid is gradually reduced, and a part of the kinetic energy is converted into static pressure energy, so that the liquid flows out along the discharge port at higher pressure intensity;

2. the device coats SiCOat composite ceramic polymer material on the pump body, the front sheath, the rear sheath, the impeller and the front guard plate, can improve the abrasion resistance of the pump body, prolong the service life of the pump body, repair the smooth surface of the rear part, reduce the damage of medium eddy current impact on the pump body flow passage part, greatly save the operation cost, ensure the economic maintenance cost, ensure the simple repair, and repeatedly use spare parts such as the impeller.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the reference symbols: 1. a bracket; 2. a shaft sleeve; 3. a front sheath; 4. a suction cap; 5. a bonding plate; 6. a mechanical seal; 7. an impeller; 8. a pump body; 9. a rear sheath; 10. a pump cover; 11. a front guard plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front," "back," "left," "right," "upper," and "lower" refer to directions in the drawings, and the terms "bottom" and "top," "inner," and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1, the present invention provides a technical solution: a coal-fired power plant desulfurization slurry circulating pump impeller prosthetic devices, including the pump body 8, can dismantle and connect with the pump cover 10 on the pump body 8, install front sheath 3 and back sheath 9 on the pump body 8, the pump body 8 fixedly connects with the bracket 1 through the joint plate 5, there are impellers 7 in the pump body 8, the impeller 7 is fixedly mounted on one end of the rotating shaft, the other end of the rotating shaft stretches out of the pump body 8 and bracket 1, the rotating shaft between pump body 8 and bracket 1 is fitted with the axle sleeve 2, seal through the mechanical seal 6 between axle sleeve 2 and pump body 8, there are front guards 11 on the pump body 8, the rotating shaft drives the impeller 7 to rotate at a high speed, in order to drive the slurry to be;

the utility model provides a coal fired power plant desulfurization slurry circulating pump impeller prosthetic devices, still includes the compound ceramic macromolecular material of SiCOAT, the compound ceramic macromolecular material of SiCOAT evenly coats on pump body 8, front sheath 3, back sheath 9, impeller 7 and front fender 11.

The pump body 8 is provided with a suction cover 4 for sucking the slurry, and the slurry in the suction pipeline enters the pump body 8 under the action of pressure difference.

The pump body 8 is provided with a discharge port for discharging the slurry under high pressure.

The rotating shaft is connected to the output end of the driving motor, so that the driving motor drives the rotating shaft to rotate.

The SiCCoat composite ceramic high polymer material is formed by mixing silicon carbide, alumina and epoxy resin in a specific ratio in a vacuum state, wherein the alumina is used as a catalyst for the reaction of the epoxy resin and a curing agent, and the viscosity of the material before curing can be improved by adding the alumina, so that the construction is facilitated.

The working principle is as follows: when the impeller 7 rotates at high speed, the impeller 7 drives the liquid among the blades to rotate together, the liquid is thrown from the center of the impeller 7 to the outer edge of the impeller 7 under the action of centrifugal force, the kinetic energy is increased along with the centrifugal force, and after the liquid enters the pump body 8, because the flow passage in the pump body 8 is gradually enlarged and the flow velocity of the liquid is gradually reduced, a part of kinetic energy is converted into static pressure energy, so that the liquid flows out along the discharge port at higher pressure, meanwhile, a certain vacuum is formed at the center of the impeller 7 because the liquid is thrown out, the pressure intensity at the liquid level is higher than the center of the impeller 7, therefore, the liquid in the suction pipeline enters the pump body 8 under the action of pressure difference, the impeller 7 rotates ceaselessly, the slurry is also sucked and pressed out ceaselessly, in addition, SiCOat composite ceramic high polymer materials are uniformly coated on the pump body 8, the front sheath 3, the rear sheath 9, the impeller 7 and the front guard plate 11 in the device.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a coal fired power plant desulfurization thick liquid circulating pump impeller prosthetic devices which characterized in that: the slurry pump comprises a pump body (8), wherein a pump cover (10) is detachably connected to the pump body (8), a front sheath (3) and a rear sheath (9) are installed on the pump body (8), the pump body (8) is fixedly connected with a bracket (1) through a combination plate (5), an impeller (7) is arranged in the pump body (8), the impeller (7) is fixedly installed at one end of a rotating shaft, the other end of the rotating shaft extends out of the pump body (8) and the bracket (1), a shaft sleeve (2) is sleeved on the rotating shaft between the pump body (8) and the bracket (1), the shaft sleeve (2) and the pump body (8) are sealed through a mechanical sealing element (6), a front protection plate (11) is further arranged on the pump body (8), and the rotating shaft drives the impeller (7) to rotate at a high speed so as to drive slurry to;

the utility model provides a coal fired power plant desulfurization slurry circulating pump impeller prosthetic devices, still includes the compound ceramic macromolecular material of SiCOAT, the compound ceramic macromolecular material of SiCOAT evenly coats on pump body (8), preceding sheath (3), back sheath (9), impeller (7) and preceding backplate (11).

2. The coal-fired power plant desulfurization slurry circulating pump impeller prosthetic devices of claim 1, characterized in that: the pump body (8) is provided with a suction cover (4) for sucking the slurry.

3. The coal-fired power plant desulfurization slurry circulating pump impeller prosthetic devices of claim 1, characterized in that: the pump body (8) is provided with a discharge port for discharging the slurry under high pressure.

4. The coal-fired power plant desulfurization slurry circulating pump impeller prosthetic devices of claim 1, characterized in that: the rotating shaft is connected to the output end of the driving motor so that the driving motor drives the rotating shaft to rotate.