CN216714486U

CN216714486U - Steam turbine does not shut down and washs automatic reagent feeding device

Info

Publication number: CN216714486U
Application number: CN202123188646.1U
Authority: CN
Inventors: 高家其; 高修强
Original assignee: Weigong Environmental Protection Technology Nanjing Co ltd
Current assignee: Weigong Environmental Protection Technology Nanjing Co ltd
Priority date: 2021-12-18
Filing date: 2021-12-18
Publication date: 2022-06-10
Anticipated expiration: 2031-12-18

Abstract

The utility model discloses an automatic dosing device for non-stop cleaning of a steam turbine, which comprises a solution tank and a dosing tank, wherein the dosing tank is connected with the solution tank through a diaphragm pump and a connecting pipe, the bottom end of the solution tank is connected with a medicine outlet pipe, one side wall of the solution tank is provided with a water pipe, the water pipe is connected with the solution tank through a water inlet branch pipe, the tail end of the water pipe is connected with the medicine outlet pipe through a ball valve, a jet reflux pipe is arranged on the water pipe and positioned between the water inlet branch pipe and the ball valve, the jet reflux pipe is connected with a high-pressure electric valve, the tail end of the medicine outlet pipe is connected with a first high-pressure medicine conveying pipe, the inlet end and the outlet end of a high-pressure plunger pump are respectively connected with the first high-pressure medicine conveying pipe and a second high-pressure medicine conveying pipe, a safety valve is connected between the first high-pressure medicine conveying pipe and the second high-pressure medicine conveying pipe through connecting pipes, and the tail end of the second high-pressure medicine conveying pipe is connected with the tail end of the jet reflux pipe, the high-pressure dosing device has the advantages of safety and stability in high-pressure dosing, simple structure and the like.

Description

Steam turbine does not shut down and washs automatic reagent feeding device

Technical Field

The utility model relates to the technical field of steam turbine dosing, in particular to an automatic dosing device for cleaning a steam turbine without stopping.

Background

The steam turbine is the main equipment of modern thermal power factory, the steam turbine can the scale deposit on blade surface after long-term use, influence the normal operating of steam turbine, current steam turbine belt cleaning device adopts the high-pressure pump to spray into the steam turbine with the liquid medicine high pressure and washs, the pipeline that the charge device exit end is connected is longer, and the exit end of high-pressure pump only adopts the relief valve as the pressure release safeguard measure on the current charge device, there is the unable timely pressure that reduces the high-pressure pump exit end when the relief valve damages back or pressure release intensity is not enough, charge device takes place to damage easily, latent potential safety hazard, high pressure adds medicine scheduling problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the technical problem of the prior art, and provides an automatic dosing device for cleaning a steam turbine without stopping the machine, which is provided with two pressure relief protection measures, wherein the other protection measure is started after a safety valve is damaged or when the pressure relief strength is insufficient, so that high-pressure dosing is safer and more stable, the structure is simple, equipment is prevented from being damaged, and the problems in the background art can be effectively solved.

In order to achieve the purpose, the utility model provides the following technical scheme: an automatic dosing device for non-stop cleaning of a steam turbine comprises a solution tank, a dosing tank and a high-pressure plunger pump, wherein a servo motor is fixedly connected to the top end of the solution tank, a rotating shaft of the servo motor is fixedly connected with a stirring shaft through a coupler, the tail end of the stirring shaft penetrates to the bottom end inside the solution tank, a stirring blade is arranged on the stirring shaft, a dosing tank is arranged on one side of the solution tank and is connected with the solution tank through a diaphragm pump and a connecting pipe, a dosing pipe is connected to the bottom end of the solution tank, a water pipe is arranged on one side wall of the solution tank, a water inlet branch pipe is arranged on the water pipe and is connected with the solution tank, the tail end of the water pipe is connected with a dosing pipe through a ball valve, a jet backflow pipe is arranged on the water pipe and is positioned between the water inlet branch pipe and the ball valve, a high-pressure electric valve is connected to the jet backflow pipe, the tail end of the dosing pipe is connected with a first high-pressure dosing pipe, the inlet end of the high-pressure plunger pump is connected with the first high-pressure dosing pipe, the outlet end of the high-pressure plunger pump is connected with a second high-pressure medicine conveying pipe, a check valve and a stop valve are arranged on the second high-pressure medicine conveying pipe, a safety valve is connected between the first high-pressure medicine conveying pipe and the second high-pressure medicine conveying pipe through a connecting pipe, and the tail end of the second high-pressure medicine conveying pipe is connected with the tail end of the injection backflow pipe.

Furthermore, a shock-proof pressure gauge is connected to the injection return pipe at the downstream of the high-pressure electric valve.

Further, a liquid level meter is arranged on the solution tank.

Furthermore, a Y-shaped filter is connected to the medicine outlet pipe.

Compared with the prior art, the utility model has the beneficial effects that: this steam turbine does not shut down and washs automatic reagent feeding device, when the pressure of high-pressure plunger pump exit end is great, the relief valve is opened, make in the high-pressure medicine conveying pipe two liquid medicine partly flow back in the high-pressure medicine conveying pipe one, reduce the pressure of high-pressure plunger pump exit end, play first safeguard measure, when the pressure of high-pressure plunger pump exit end is too big, high-pressure motorised valve is opened, liquid medicine in the high-pressure medicine conveying pipe two flows into the water pipe along injection back flow, in the solution jar is flowed back to through the branch pipe of intaking, play second safeguard measure, prevent that equipment from taking place to damage, high-pressure adds medicine more safety and stability, and is simple structure.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

In the figure: the device comprises a solution tank 1, a servo motor 2, a stirring shaft 3, a stirring blade 4, a dosing tank 5, a diaphragm pump 6, a water pipe 7, a water inlet branch pipe 8, a medicine outlet pipe 9, a ball valve 10, a Y-shaped filter 11, a high-pressure plunger pump 12, a safety valve 13, a jet reflux pipe 14, a high-pressure electric valve 15, a shock-resistant pressure gauge 16, a liquid level meter 17, a high-pressure medicine conveying pipe I18 and a high-pressure medicine conveying pipe II 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1, the present invention provides a technical solution: an automatic dosing device for cleaning a steam turbine without stopping comprises a solution tank 1, a dosing tank 5 and a high-pressure plunger pump 12, wherein the top end of the solution tank 1 is fixedly connected with a servo motor 2, a rotating shaft of the servo motor 2 is fixedly connected with a stirring shaft 3 through a coupler, the tail end of the stirring shaft 3 penetrates to the bottom end inside the solution tank 1, a stirring blade 4 is arranged on the stirring shaft 3, the dosing tank 5 is arranged on one side of the solution tank 1, the dosing tank 5 is connected with the solution tank 1 through a diaphragm pump 6 and a connecting pipe, a dosing pipe 9 is connected with the bottom end of the solution tank 1, a water pipe 7 is arranged on one side wall of the solution tank 1, a water inlet branch pipe 8 is arranged on the water pipe 7, the water inlet branch pipe 8 is connected with the solution tank 1, the tail end of the water pipe 7 is connected with the dosing pipe 9 through a ball valve 10, a spray return pipe 14 is arranged on the water pipe 7 and positioned between the water inlet branch pipe 8 and the ball valve 10, and a high-pressure plunger pump 15 is connected on the spray return pipe 14, the tail end of the medicine outlet pipe 9 is connected with a first high-pressure medicine conveying pipe 18, the inlet end of the high-pressure plunger pump 12 is connected with the first high-pressure medicine conveying pipe 18, the outlet end of the high-pressure plunger pump 12 is connected with a second high-pressure medicine conveying pipe 19, the second high-pressure medicine conveying pipe 19 is provided with a check valve and a stop valve, a safety valve 13 is connected between the first high-pressure medicine conveying pipe 18 and the second high-pressure medicine conveying pipe 19 through a connecting pipe, the tail end of the second high-pressure medicine conveying pipe 19 is connected with the tail end of the injection backflow pipe 14, the medicine in the medicine adding box 5 is conveyed into the solution tank 1 through the diaphragm pump 6, a water supply device arranged outside is conveyed into the solution tank 1 through a water inlet branch pipe 8 connected with a water pipe 7, the servo motor 2 drives the stirring blades 4 to rotate to mix the medicine, the medicine in the solution tank 1 is pumped into the second high-pressure medicine conveying pipe 19 through the high-pressure plunger pump 12, and the medicine is sprayed into a steam turbine or a boiler for providing steam for the steam turbine through the injection backflow pipe 14, when the pressure at the outlet end of the high-pressure plunger pump 12 is high, the safety valve 13 is opened, so that part of the liquid medicine in the high-pressure medicine conveying pipe two 19 flows back into the high-pressure medicine conveying pipe one 18, the pressure at the outlet end of the high-pressure plunger pump 12 is reduced, when the pressure at the outlet end of the high-pressure plunger pump 12 is too high, the high-pressure electric valve 15 is opened, the liquid medicine in the high-pressure medicine conveying pipe two 19 flows into the water pipe 7 along the injection backflow pipe 14 and flows back into the solution tank 1 through the water inlet branch pipe 8, high-pressure medicine adding is safer and more stable, the plunger pump is prevented from being damaged, and the structure is simple.

Further, a shock-proof pressure gauge 16 is connected to the jet return pipe 14 downstream of the high-pressure electric valve 15, and the pressure at the outlet end of the jet return pipe 14 is monitored by the shock-proof pressure gauge 16.

Further, a liquid level meter 17 is arranged on the solution tank 1, and the liquid level of the liquid medicine in the solution tank 1 is monitored through the liquid level meter 17.

Furthermore, a Y-shaped filter 11 is connected to the medicine outlet pipe 9, and particulate matters flowing out of the solution tank 1 are filtered through the Y-shaped filter 11, so that the inlet end of the high-pressure plunger pump 12 is prevented from being blocked.

When in use: the method comprises the steps that the medicaments in a dosing tank 5 are conveyed into a solution tank 1 through a diaphragm pump 6, a water supply device arranged outside is conveyed into the solution tank 1 through a water inlet branch pipe 8 connected with a water pipe 7, a servo motor 2 drives a stirring blade 4 to rotate to mix the medicaments, the liquid medicaments in the solution tank 1 are pumped into a high-pressure medicament conveying pipe II 19 through a high-pressure plunger pump 12, the liquid medicaments are sprayed into a steam turbine or a boiler for providing steam for the steam turbine through a spray return pipe 14, when the pressure at the outlet end of the high-pressure plunger pump 12 is high, a safety valve 13 is opened, part of the liquid medicaments in the high-pressure medicament conveying pipe II 19 flow back into a high-pressure medicament conveying pipe I18, the pressure at the outlet end of the high-pressure plunger pump 12 is reduced, when the pressure at the outlet end of the high-pressure plunger pump 12 is too high, an electric valve 15 is opened, the liquid medicaments in the high-pressure medicament conveying pipe II 19 flow into the water pipe 7 along the spray return pipe 14 and flow back into the solution tank 1 through the water inlet branch pipe 8, the anti-vibration pressure gauge 16 monitors the pressure at the outlet end of the injection return pipe 14, and the liquid level of the liquid medicine in the solution tank 1 is monitored by the liquid level meter 17.

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 utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a steam turbine does not shut down and washs automatic reagent feeding device, includes solution tank, dosing tank and high-pressure plunger pump, solution tank top fixedly connected with servo motor, and shaft coupling fixedly connected with (mixing) shaft is passed through in servo motor's pivot, and the end of (mixing) shaft runs through to the inside bottom of solution tank, and is equipped with stirring vane on the (mixing) shaft, and one side of solution tank is equipped with the dosing tank, and the dosing tank passes through the diaphragm pump and the connecting pipe is connected with the solution tank, and the solution tank bottom is connected with out pencil, its characterized in that: the improved chemical spraying device is characterized in that a water pipe is arranged on one side wall of the solution tank, a water inlet branch pipe is arranged on the water pipe and is connected with the solution tank, the tail end of the water pipe is connected with a chemical outlet pipe through a ball valve, an injection backflow pipe is arranged between the water inlet branch pipe and the ball valve on the water pipe and is connected with a high-pressure electric valve, the tail end of the chemical outlet pipe is connected with a first high-pressure chemical delivery pipe, the inlet end of a high-pressure plunger pump is connected with the first high-pressure chemical delivery pipe, the outlet end of the high-pressure plunger pump is connected with a second high-pressure chemical delivery pipe, a check valve and a stop valve are arranged on the second high-pressure chemical delivery pipe, a safety valve is connected between the first high-pressure chemical delivery pipe and the second high-pressure chemical delivery pipe through a connecting pipe, and the tail end of the second high-pressure chemical delivery pipe is connected with the tail end of the injection backflow pipe.

2. The steam turbine non-stop cleaning automatic dosing device according to claim 1, characterized in that: and the injection return pipe is connected with a shock-resistant pressure gauge at the downstream of the high-pressure electric valve.

3. The steam turbine non-stop cleaning automatic dosing device according to claim 1, characterized in that: and a liquid level meter is arranged on the solution tank.

4. The steam turbine non-stop cleaning automatic dosing device according to claim 1, characterized in that: the medicine outlet pipe is connected with a Y-shaped filter.