Mechanical seal water circulation system of slurry pump mechanical seal

Abstract

The utility model discloses a mechanical seal water circulation system of a slurry pump mechanical seal, belongs to the technical field of chemical production, and solves the problems that a mechanical seal water tank of the slurry pump mechanical seal is not provided with a solid-liquid separation device, and leakage of the slurry pump mechanical seal is slow to find and difficult to clean. The device comprises a filter which is arranged on a water return pipe, an inlet pressure gauge is arranged at a water inlet of the filter, and an outlet pressure gauge is arranged at a water outlet of the filter. The solid-liquid separation device is simple in structure and stable in operation, effectively solves the problems that a mechanical seal water tank of a slurry pump mechanical seal is not provided with a solid-liquid separation device, leakage of the slurry pump mechanical seal is slow to find and difficult to clean, and has very high popularization value.

Description

TECHNICAL FIELD

[0001] The utility model belongs to chemical production technical field, concretely relates to a machine seal water circulation system of slurry pump machine seal. BACKGROUND

[0002] In the production of PVC by calcium carbide method, the machine pump of polymerization device needs to be provided with an independent machine seal water circulation system. During the polymerization reaction or when conveying high-temperature medium, a large amount of heat will be generated at the mechanical seal part of the pump. If the heat is not dissipated in time, the sealing element will be overheated and damaged. The machine seal water circulation system circulates the cooling water to directly or indirectly contact the friction surface of the mechanical seal and take away the heat generated by friction, so as to maintain the sealing element within a safe working temperature range and prevent deformation, hardening or failure caused by overheating. The cooling water not only has a cooling effect, but also provides necessary lubrication for the sealing surface to reduce wear. Clean cooling water can flush away impurities on the sealing surface, avoid the entry of particulate matter into the sealing gap, reduce wear, maintain the flatness of the sealing surface, and thus improve the sealing effect.

[0003] At present, during the operation of the slurry pump machine seal water circulation system, the slurry pump machine seal is prone to leakage, which causes the PVC resin to flow into the machine seal water circulation system along with the machine seal water, blocks the machine seal water pipelines of other pumps, causes the machine seal water of other pumps to be interrupted, damages the machine seal of the pump body, affects production, increases maintenance cost, and increases the consumption of desalinated water per unit product, resulting in an increase in production cost. In addition, the cleaning of PVC resin in the machine seal water pipeline requires a large amount of manual labor. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of machine seal water circulation system of slurry pump machine seal to solve the problem that the machine seal water tank of current slurry pump machine seal has no solid-liquid separation device, when slurry pump machine seal leaks, production needs to be suspended and machine seal water tank is cleaned, which greatly consumes manpower and material resources.

[0005] The technical scheme of the utility model is as follows: a kind of machine seal water circulation system of slurry pump machine seal, including machine seal water tank and slurry pump, machine seal water tank and slurry pump are connected by water supply pipe and backwater pipe, further including filter, filter is installed on backwater pipe, inlet pressure gauge is installed on the water inlet of filter, outlet pressure gauge is installed on the water outlet of filter.

[0006] As a further improvement of the utility model, the backwater pipe is also provided with a pipeline sight glass to facilitate the observation of the operation status of the machine seal water of each user pump.

[0007] The utility model discloses an advantageous effect is: the utility model discloses a filter is set up on the backwater pipe, effectively insulates the polyvinyl chloride resin into machine seal water tank, can directly find whether the slurry pump machine seal is normal operation through the pressure difference of the inlet pressure gauge and the outlet pressure gauge of filter two sides, and the pipeline sight glass can conveniently observe whether there is a large amount of polyvinyl chloride resin in the backwater pipe. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is structural schematic diagram of the utility model.

[0009] In the drawing: 1 - machine seal water tank, 2 - inlet pipe, 3 - machine seal water pump, 4 - water supply pipe, 5 - slurry pump, 6 - backwater pipe, 7 - pipeline sight glass, 8 - inlet pressure gauge, 9 - filter, 10 - outlet pressure gauge, 11 - blowdown, 12 - desalted water supplement pipe, 13 - baffle. DETAILED DESCRIPTION

[0010] The utility model will be further explained in detail in combination with the drawings and specific embodiment.

[0011] As Figure 1 Shown, a kind of machine seal water circulation system of slurry pump machine seal, existing including machine seal water tank 1 and slurry pump 5, machine seal water tank 1 and slurry pump 5 are connected by water supply pipe 4 and backwater pipe 6.

[0012] A kind of machine seal water circulation system of slurry pump machine seal, further include filter 9, filter 9 is installed on backwater pipe 6, inlet of filter 9 is equipped with inlet pressure gauge 8, outlet of filter 9 is equipped with outlet pressure gauge 10.

[0013] Backwater pipe 6 is also equipped with pipeline sight glass 7, and the operation condition of each slurry pump 5 machine seal water is conveniently observed.

[0014] When using, open desalted water supplement pipe 12, after machine seal water tank 1 is supplemented liquid level to 80%, close desalted water supplement pipe 12, start slurry pump 5, so that slurry pump 5 machine seal starts normal work, while starting machine seal water pump 3, whether machine seal water circulation system is normal work is observed by pipeline sight glass 7, and inlet pressure gauge 8 and outlet pressure gauge 10 pressure difference need to be checked regularly when using, when inlet pressure-outlet pressure is greater than or equal to 0.1Mpa, it indicates that user pump 5 appears machine seal leakage, pause slurry pump 5, replace filter 9, clean the filter element of the filter 9 replaced last time, so as to replace next time, continue to operate after slurry pump 5 maintenance is completed, open blowdown 11 after daily work, and a small amount of polyvinyl chloride slurry and other impurities deposited on the side of baffle 13 are discharged.

Claims

1. A machine seal water circulation system of a slurry pump machine seal, comprising a machine seal water tank (1) and a slurry pump (5), the machine seal water tank (1) and the slurry pump (5) being connected through a water feeding pipe (4) and a water returning pipe (6), characterized in that: It also comprises a filter (9) installed on the return water pipe (6), the water inlet of the filter (9) is provided with an inlet pressure gauge (8), the water outlet of the filter (9) is provided with an outlet pressure gauge (10), and the return water pipe (6) is also provided with a pipe sight glass (7).

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