CN204420217U - A kind of positive/negative-pressure seal water system - Google Patents

Abstract

The utility model discloses a positive and negative pressure water sealing system, which is mainly used for isolating volatile, poisonous and harmful gases from the atmosphere in the chemical industry. The positive and negative pressure water seal system includes a water seal tank body, a body sight glass, an inner partition, an internal gas-phase communication pipe, a vent inner tube, a process gas port, a vent port, an overflow port, a clean port, and a water replenishment port. The positive and negative pressure water sealing system of the utility model achieves the function of positive pressure water sealing and negative pressure water sealing at the same time through the optimization of equipment structure, and has simple structure, convenient operation and high stability.

Description

A positive and negative pressure water seal system

technical field

The utility model relates to the field of chemical equipment, in particular to a positive and negative pressure water sealing system.

Background technique

Water-sealed tank refers to the equipment or pipe fittings used to ensure the pressure in the tank in the chemical process, which acts like a safety valve. Water seals are usually divided into two categories, one is positive pressure water seal: when the pressure inside the tank is too high (over the height of the water column in the water seal), a certain pressure is discharged through the water seal to prevent overpressure. The second is negative pressure water seal: when the pressure in the tank is too low (lower than the height of the water column in the water seal), a certain amount of air is introduced through the water seal to prevent the tank from being damaged by excessive negative pressure. It can be seen that the water-sealed tank is a safety facility that isolates volatile, toxic and harmful gases from the atmosphere. It can effectively reduce the pollution of the environment caused by gas volatilization, and at the same time adjust the pressure balance in the storage tank to ensure the stable operation of the device. .

When the traditional water sealing system needs to realize positive pressure and negative pressure water sealing at the same time, it usually adopts the design of two water sealing tanks, that is, positive pressure water sealing tank and negative pressure water sealing tank, or simply positive pressure water sealing tank The tank and the negative pressure water-sealed tank are combined, and the two tanks share part of the tank wall. This design has the disadvantages of relatively large equipment occupation, relatively complicated external piping of the water-sealed tank, and many valves and pipe fittings used.

Utility model content

In order to solve the problems existing in the prior art, the utility model provides a system that uses only one water seal tank body to realize two functions of positive pressure water seal and negative pressure water seal at the same time, and is mainly used for isolating volatile, A positive and negative pressure water seal system between toxic and harmful gases and the atmosphere.

The utility model is realized through the following technical solutions:

A positive and negative pressure water seal system, comprising a water seal tank body, an inner partition, an internal gas-phase communication pipe, a vent inner intubation tube, a process gas port, a vent port, an overflow port, a net discharge port and a water replenishment port; the water seal The tank body is divided into an upper chamber and a lower chamber through an inner partition, and the upper chamber and the lower chamber are connected through the internal gas-phase communication pipe; the process gas port is located above the water-sealed tank body, and passes through the gas-phase pipeline Connected with the storage tank; each of the upper chamber and the lower chamber is provided with a vent port, which is respectively connected to the atmosphere through a vent inner tube; the water replenishment port is provided on the upper part of the upper chamber; the overflow port is provided in the lower chamber The upper part; there are two cleaning ports, which are respectively arranged on the bottom side of the upper chamber and the lower chamber;

Further, the number of the process gas port is 1, and it is provided to extend to the liquid surface inside the water-sealed tank body through the emptying inner intubation; the number of the overflow port is 1; the number of the water replenishment port is 1 indivual;

Further, the upper chamber and the lower chamber are respectively provided with body mirrors for observing the liquid level in the water seal;

Further, the positive and negative pressure water seal system can set the necessary thermal insulation and heat tracing system according to the ambient temperature;

Further, the overflow port is separately connected to the drain line or shares the same drain line with the drain port;

Further, the vent ports respectively provided in the upper chamber and the lower chamber are respectively connected to the atmosphere through vent inner tubes connected to vent lines, or share the same vent line to connect to the atmosphere.

The beneficial effects of the utility model are:

(1), the utility model only adopts a water seal tank body to simultaneously realize two functions of positive pressure water seal and negative pressure water seal, which reduces the occupied area of the equipment.

(2), the utility model has only one process gas port, one overflow port and one water supply port, which reduces the complexity of external piping, reduces the length of external piping and the number of related valves and pipe fittings.

(3), the utility model reduces the number of flange connections of the equipment body, and reduces the risk of equipment leakage.

(4), the utility model is simple in structure, easy to operate and maintain.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1. Water-sealed tank body; 2. Body sight glass; 3. Inner partition; 4. Internal gas phase communication pipe, 5. Vent inner tube; 6. Process gas port; 7. Vent port; 8. Overflow 9. Cleaning port; 10. Water supply port; 11. Thermal insulation and heat tracing system.

Detailed ways

As shown in Figure 1, the utility model discloses a positive and negative pressure water sealing system, including a water sealing tank body 1, a body mirror 2, an inner partition 3, an internal gas phase communication pipe 4, an emptying inner insertion pipe 5, Process gas port 6, vent port 7, overflow port 8, net vent port 9, water replenishment port 10 and thermal insulation and heat tracing system 11. Among them, the internal gas-phase communication pipe 4 is connected to the upper and lower chambers inside the water seal; the process gas port 6 is connected to the storage tank; the vent port 7 is connected to the atmosphere.

The gas phase pipeline of the storage tank is only connected to one process gas port 6 of the positive and negative pressure water seal system, and the process gas port 6 is provided with an extended intubation tube to the liquid surface inside the water seal tank body. The positive and negative pressure water seal system is only provided with an overflow port 8 and a water supply port 10, and its upper and lower chambers are respectively provided with a vent port 7. The overflow port 8 can be separately connected to the drain line, or can share the same drain line with the drain port 9; the empty port 7 can be connected to the lead line separately to be connected to the atmosphere, or can share the same drain line. In the positive and negative pressure water seal system, there are body mirrors 2 in the upper chamber and the lower chamber, so as to observe the liquid level in the water seal system. At the same time, the positive and negative pressure water seal system can also set the necessary thermal insulation and heat tracing system according to the ambient temperature. 11.

The use process of the utility model is as follows: when in use, first inject water from the water supply port 10 into the water seal, and the water injection situation of the upper chamber of the water seal can be observed through the upper chamber body mirror 2, after the upper chamber is filled with water, the water Flow into the lower chamber through the internal gas-phase communication pipe 4 until the water flows out from the overflow port 8 after the lower chamber is filled with water, and the water injection situation of the lower chamber can be observed from the lower chamber body mirror. At this time, a stable liquid level has been established in the water seal, and then the process gas port 6 is connected to communicate the water seal with the system gas phase, and the positive and negative pressure water seals are put into use. If the ambient temperature is lower, the thermal insulation and heat tracing system 11 can be put into use to ensure that the water in the water seal will not freeze. When the positive and negative pressure water seal is out of use, first close the process gas port 6 to disconnect the water seal from the system, and then open the cleaning port 9 to drain the water in the water seal.

The utility model optimizes the traditional positive and negative pressure water seal system, reduces equipment occupation, reduces the number of piping, related valves and pipe fittings, and ensures the safety and stability of the system at the same time.

Although the preferred embodiments of the present utility model have been described above in conjunction with the accompanying drawings and preferred embodiments, the present utility model is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative and not restrictive Under the enlightenment of the utility model, those skilled in the art can also make many forms of specific transformations without departing from the purpose of the utility model and the scope of protection of the claims, and these all belong to the protection scope of the utility model within.

Claims (9)

1. A positive and negative pressure water seal system, characterized in that it includes a water seal tank body, an inner partition, an internal gas-phase communication pipe, a vent inner tube, a process gas port, a vent port, an overflow port, a clean port and water replenishment mouth; The body of the water-sealed tank is divided into an upper chamber and a lower chamber through an inner partition, and the upper chamber and the lower chamber are connected through the internal gas-phase communication pipe; The process gas port is located above the body of the water-sealed tank, and is connected to the storage tank through the gas phase pipeline of the storage tank; Each of the upper chamber and the lower chamber is provided with a vent port, and is respectively connected to the atmosphere through a vent inner intubation tube; The water supply port is arranged on the upper part of the upper chamber; the overflow port is arranged on the upper part of the lower chamber; There are two cleaning ports, which are respectively arranged at the bottom of the upper chamber and the lower chamber. 2. The positive and negative pressure water seal system according to claim 1, characterized in that: the number of the process gas port is one. 3. The positive and negative pressure water seal system according to claim 1, characterized in that: there is one overflow port. 4. The positive and negative pressure water seal system according to claim 1, characterized in that: the number of the water supply port is one. 5. The positive and negative pressure water sealing system according to claim 1, characterized in that: the upper chamber and the lower chamber are both provided with body mirrors. 6. The positive and negative pressure water seal system according to claim 1, characterized in that: the positive and negative pressure water seal system also includes a thermal insulation and heat tracing system. 7. The positive and negative pressure water sealing system according to claim 2, characterized in that: the process gas port is provided with a venting inner cannula extending below the liquid surface inside the water sealing tank body. 8. The positive and negative pressure water seal system according to claim 3, characterized in that: the overflow port is separately connected to the drain line or shares the same drain line with the drain port. 9. The positive and negative pressure water seal system according to claim 1, characterized in that: the vent ports respectively provided in the upper chamber and the lower chamber are respectively connected to the atmosphere through the vent inner intubation pipe and the vent pipeline, or share the same The vent line is connected to atmosphere.