Mechanical seal water temperature adjusting system

Abstract

The utility model discloses a mechanical seal water temperature adjusting system, which comprises a mechanical seal mechanism and a mechanical seal water inlet pipe arranged on the mechanical seal mechanism, and is characterized by further comprising a mechanical seal water supplementing pipe, a steam discharge pipe, a steam condensate outlet pipe, a drain tank, a water pump and a steam condensate inlet pipe, a valve is arranged on the mechanical seal water supplementing pipe; the bottom of the steam discharge pipe is communicated with one end of a steam condensate outlet pipe, the other end of the steam condensate outlet pipe is connected with an inlet of a drain tank, an outlet of the drain tank is connected with an inlet of a water pump, an outlet of the water pump is connected with one end of a steam condensate inlet pipe, and the other end of the steam condensate inlet pipe is communicated with a mechanical seal water inlet pipe. And an electric control valve is arranged on the steam condensate inlet pipe. The device has the advantages that the constant-temperature water of the mechanical seal is changed into the steam condensate, the water temperature rises to be beneficial to melting of salt crystallized at the mechanical seal, no crystallized salt is kept at the mechanical seal all the time, the mechanical seal is prevented from being abraded, and the service life of the mechanical seal is prolonged.

Description

Technical field:

[0001] The utility model relates to the technical field of water treatment, in particular to a mechanical seal water temperature regulating system. Background technology:

[0002] When wastewater (concentrated brine) is treated by evaporation crystallization, the wastewater is heated to evaporate the water, and the salt solubility exceeds the saturation and crystallizes. This method is suitable for wastewater with high salt concentration.

[0003] The wastewater is pumped by a water pump. Generally, the water pump is equipped with a mechanical seal, and the mechanical seal will be fed with sealing water (the main function of the sealing water is to cool and lubricate the mechanical seal to prevent the mechanical seal from being damaged due to high temperature and friction, thereby ensuring the normal operation of the equipment). The sealing water is kept at a constant temperature of about 30°. After long-term operation, it was found that due to the low water temperature, some salt in the wastewater passing through the water pump crystallized at the mechanical seal, causing wear and damage to the mechanical seal, which required frequent maintenance. Utility model content:

[0004] The utility model aims to provide a mechanical seal water temperature regulating system.

[0005] The utility model is implemented by the following technical solutions:

[0006] A mechanical seal water temperature regulating system, comprising a mechanical seal mechanism and a mechanical seal water inlet pipe arranged on the mechanical seal mechanism, and also comprising a mechanical seal water replenishing pipe, a steam discharge pipe, a steam condensate outlet pipe, a drain tank, a water pump, and a steam condensate inlet pipe, wherein the mechanical seal water replenishing pipe is connected to one end of the mechanical seal water inlet pipe, and a valve is arranged on the mechanical seal water replenishing pipe;

[0007] The bottom of the steam exhaust pipe is connected to one end of the steam condensate outlet pipe, the other end of the steam condensate outlet pipe is connected to the drain tank inlet, the drain tank outlet is connected to the water pump inlet, the water pump outlet is connected to one end of the steam condensate inlet pipe, the other end of the steam condensate inlet pipe is connected to the machine seal water inlet pipe, and an electric control valve is provided on the steam condensate inlet pipe.

[0008] Preferably, it also includes a controller and a temperature sensor, wherein the temperature sensor is arranged on the mechanical seal water inlet pipe between the mechanical seal mechanism and the steam condensate inlet pipe, the signal output end of the temperature sensor is connected to the signal input end of the controller, and the controller is electrically connected to the electric control valve.

[0009] Advantages of the utility model: the utility model replaces the mechanical seal constant temperature water with steam condensate. Since the water temperature of the steam condensate is higher than the water temperature of the mechanical seal constant temperature water, it is beneficial to melt the salt crystallized at the mechanical seal and always keep the mechanical seal free of crystallized salt, thereby avoiding mechanical seal wear and extending the service life of the mechanical seal. Description of the drawings:

[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 It is a control block diagram of the utility model.

[0013] In the figure: mechanical sealing mechanism 1, mechanical sealing water inlet pipe 2, mechanical sealing water replenishing pipe 3, steam discharge pipe 4, steam condensate outlet pipe 5, drain tank 6, water pump 7, steam condensate inlet pipe 8, valve 9, electric control valve 10, temperature sensor 11, controller 12. Specific implementation method:

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] like Figure 1 , Figure 2 As shown, a mechanical seal water temperature regulating system includes a mechanical seal mechanism 1 and a mechanical seal water inlet pipe 2 arranged on the mechanical seal mechanism 1, and also includes a mechanical seal water replenishing pipe 3, a steam discharge pipe 4, a steam condensate outlet pipe 5, a drain box 6, a water pump 7, and a steam condensate inlet pipe 8. The mechanical seal water replenishing pipe 3 is connected to one end of the mechanical seal water inlet pipe 2, and a valve 9 is arranged on the mechanical seal water replenishing pipe 3; mechanical seal constant temperature water is delivered into the mechanical seal mechanism 1 through the mechanical seal water replenishing pipe 3 and the mechanical seal water inlet pipe 2, and the valve 9 controls the on and off of the mechanical seal constant temperature water.

[0016] The bottom of the steam discharge pipe 4 is connected to one end of the steam condensate outlet pipe 5, the other end of the steam condensate outlet pipe 5 is connected to the inlet of the drain box 6, the outlet of the drain box 6 is connected to the inlet of the water pump 7, the outlet of the water pump 7 is connected to one end of the steam condensate inlet pipe 8, the other end of the steam condensate inlet pipe 8 is connected to the machine seal water inlet pipe 2, and the steam condensate inlet pipe 8 is provided with an electric control valve 10; the evaporated and crystallized steam is discharged through the steam discharge pipe 4, and the evaporated condensate flows into the drain through the steam condensate outlet pipe 5 The steam condensate is stored in the box 6, and the steam condensate can be extracted by the water pump 7, and sent to the machine seal mechanism 1 through the steam condensate inlet pipe 8 and the machine seal water inlet pipe 2, replacing the machine seal constant temperature water as a new water source for the machine seal water, and the electric control valve 10 controls the on and off of the steam condensate; at this time, the steam condensate temperature is 80-95°. Since the water temperature of the steam condensate is higher than the water temperature of the machine seal constant temperature water, it is beneficial to melt the salt crystallized at the machine seal, and always keep the machine seal free of crystallized salt, avoid machine seal wear, and extend the service life of the machine seal.

[0017] It also includes a controller 12 and a temperature sensor 11. The controller 12 is a PLC controller. The temperature sensor 11 is arranged on the mechanical seal water inlet pipe 2 between the mechanical seal mechanism 1 and the steam condensate inlet pipe 8. The signal output end of the temperature sensor 11 is connected to the signal input end of the controller 12. The controller 12 is electrically connected to the electric control valve 10. The temperature sensor 11 detects the mechanical seal water temperature entering the mechanical seal mechanism 1. The water temperature range for melting salt is preset as the upper and lower limits. Since the water temperature of the steam condensate may vary, it is necessary to control the mechanical seal water temperature entering the mechanical seal mechanism 1 between the upper and lower limits. When the mechanical seal constant temperature water is introduced, the steam condensate is added to adjust the temperature. When the water temperature is lower than the lower limit, the controller 12 gives a signal, the opening of the electric control valve 10 increases, and the steam condensate is increased. When the water temperature is higher than the upper limit, the controller 12 gives a signal, the opening of the electric control valve 10 decreases, and the steam condensate is reduced. A check valve is arranged on the mechanical seal water replenishment pipe 3.

[0018] Working principle: The mechanical seal constant temperature water is delivered to the mechanical seal mechanism 1 through the mechanical seal water replenishment pipe 3 and the mechanical seal water inlet pipe 2. The valve 9 controls the on-off of the mechanical seal constant temperature water. The evaporated and crystallized steam is discharged through the steam discharge pipe 4. The evaporated condensate flows into the drain tank 6 for storage through the steam condensate outlet pipe 5. The steam condensate can be extracted by the water pump 7 and delivered to the mechanical seal mechanism 1 through the steam condensate inlet pipe 8 and the mechanical seal water inlet pipe 2 to replace the mechanical seal constant temperature water as the new water source of the mechanical seal water. The electric control valve 10 controls the on-off of the steam condensate.

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical seal water temperature regulating system, comprising a mechanical seal mechanism and a mechanical seal water inlet pipe arranged on the mechanical seal mechanism, characterized in that: It also includes a machine seal water replenishment pipe, a steam discharge pipe, a steam condensate outlet pipe, a drain tank, a water pump, and a steam condensate inlet pipe. The machine seal water replenishment pipe is connected to one end of the machine seal water inlet pipe, and a valve is provided on the machine seal water replenishment pipe; The bottom of the steam exhaust pipe is connected to one end of the steam condensate outlet pipe, the other end of the steam condensate outlet pipe is connected to the drain tank inlet, the drain tank outlet is connected to the water pump inlet, the water pump outlet is connected to one end of the steam condensate inlet pipe, the other end of the steam condensate inlet pipe is connected to the machine seal water inlet pipe, and an electric control valve is provided on the steam condensate inlet pipe.

2. A mechanical seal water temperature regulating system according to claim 1, characterized in that: It also includes a controller and a temperature sensor. The temperature sensor is arranged on the mechanical seal water inlet pipe between the mechanical seal mechanism and the steam condensate inlet pipe. The signal output end of the temperature sensor is connected to the signal input end of the controller, and the controller is electrically connected to the electric control valve.

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