CN2552865Y

CN2552865Y - Apparatus for preventing air pollution from chemical storage pot and explosion

Info

Publication number: CN2552865Y
Application number: CN 02265619
Authority: CN
Inventors: 赵国樑
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-19
Filing date: 2002-07-19
Publication date: 2003-05-28
Anticipated expiration: 2012-07-19

Abstract

The utility model relates to a device for preventing chemical storage tank polluting air and exploding, which comprises a liquid storage tank, a pressure sensor, a standby storage tank, a controller, a buffer device, a first breather valve and a second breather valve. An air outlet is arranged on the top of the liquid storage tank. The buffer device comprises an air storage tank, an elastic buffer and a safety breather valve. The air outlet is connected to the air inlet of the elastic buffer through a main pipe, while the safety breather valve is arranged in the air vent of the elastic buffer. Thanks to the buffer device of the elastic buffer, the mixed gas with materials emitted from the liquid storage tank can be stored in the elastic buffer. The utility model has the advantages of having no pollution to air and meeting the requirements of environmental protection, and also, avoiding explosion and minimizing the probability of explosion because a double sensors are arranged on and matched with the liquid storage tank.

Description

Prevent the device of chemical storage tank to atmospheric contamination and blast

Technical field

The utility model relates to a kind of chemical storage tank, especially prevents that about a kind of gas in receiver or the gas tank from preventing the device of chemical storage tank to atmospheric contamination and blast to what atmospheric contamination was blasted.

Technical background

At present, the chemical storage tank that in industrial systems such as chemistry, petrochemical industry, light textile, rubber, uses, all adopt both at home and abroad single-sensor to regulate pressure in receiver or the gas tank, in case the pressure in receiver or the gas tank is greater than rated value with when sensor acquisition arrives this pressure threshold value, immediately Open valve with a part of gaseous emission in atmosphere, perhaps with a part of fluid drainage in reserve tank, after making receiver or gas tank liquid level or gaseous tension drop to the safe threshold values of appointment, valve-off again.This processing mode is except the atmosphere around the gross pollution, also can be because of using single-sensor, and in the operation of transducing signal, often existing certain uncertain fugitiveness, blast almost respectively accounts for half with inexplosive possibility probability, so explosion accident always happens occasionally.

Main purpose of the present utility model is to provide a kind of device that prevents chemical storage tank to atmospheric contamination and blast in order to overcome above-mentioned defective, and this device can prevent that chemical industry material gaseous emission is in atmosphere and/or prevent the blast that the instability because of the sensor senses signal causes.

The general introduction of invention

For achieving the above object, device of the present utility model, comprise and have storage liquid input and output mouth, the receiver of top-portion apertures capping, pressure sensor, reserve tank and controller, wherein, described receiver is provided with a gas delivery port on tank deck, also comprise a shock absorber, one first breathing valve and one second breathing valve, this shock absorber is by a gas tank, one elastic buffer, one safe breathing valve is formed, shown in gas tank be provided with one first perforate and one second perforate, described elastic buffer has an admission port and an exhausr port, described receiver gas delivery port passes first perforate of gas tank and the elastic buffer admission port that is connected to by trunk line, described safe breathing valve is installed on the elastic buffer exhausr port, in addition, described first breathing valve is installed on the trunk line, and described second breathing valve connects gas tank second perforate by secondary duct.

As previously discussed prevent the device of chemical storage tank to atmospheric contamination and blast, wherein, described receiver is provided with two pressure sensors, i.e. first and second pressure sensors at its top.

As previously discussed prevent the device of chemical storage tank to atmospheric contamination and blast, wherein, described reserve tank is connected with trunk line by the 3rd pipeline, and on the 3rd pipeline the 3rd breathing valve is set.

As previously discussed prevent the device of chemical storage tank to atmospheric contamination and blast, wherein, also comprise a pump, first and second electromagnetic valve and the bleeder valve, the pump and first electromagnetic valve are connected between reserve tank and the receiver hole capping, bleeder valve is connected storage liquid delivery port, the second electromagnetic valve valve is connected between reserve tank and the bleeder valve, and described controller 4 is electrically connected with first, second pressure sensor, level sensor and first and second electromagnetic valve and pump respectively.

As previously discussed prevent the device of chemical storage tank to atmospheric contamination and blast, wherein, the secondary duct on second breathing valve also is equipped with a flame trap.

Can be well understood to from above-mentioned summary description,,, thereby can reach and satisfy environmental protection requirement so the miscellaneous gas that contains material can atmosphere pollution under the situation of the overwhelming majority because of the utility model is equipped with the shock absorber with elastic buffer.In addition, in use to the essentially no loss of material in the former receiver, and safe breathing valve is set and adopts dual sensor, so that can avoid effectively exploding and making the possibility of blast be reduced to minimum value at the elastic buffer exhausr port.Elastic buffer has the garden column structure of corrugation shape, and it can the blocking channel mouth when pucker ﹠ bloat, thereby has prevented the serious accident generation.

Brief description of drawings

Fig. 1 is the formation and the arrangement plan thereof of device of the present utility model;

Fig. 2 is the controller that lists for example diagram of circuit to the control process of each sensor and electromagnetic valve.

The detailed description of preferred embodiment

See also Fig. 1, the device that prevents chemical storage tank to atmospheric contamination and blast of the present utility model, comprise a receiver 1, a reserve tank 2, a shock absorber 3, controller 4, a pump 5, one first breathing valve BP1, one second breathing valve BP2, one the 3rd breathing valve BP3, pressure sensor and level sensor (not drawing among the figure), wherein, receiver 1 is provided with storage liquid input and output mouth in the bottom, respectively meet a valve V1, V2 at the input and output mouth, on tank deck, have a top-portion apertures capping 11 and a gas delivery port 12.

Reserve tank 2 is provided with three perforates thereon, an inlet hole, an egress hole and an air gate.Inlet hole is to be connected with V2 by electromagnetic valve 8 with the delivery port of receiver 1, and egress hole is connected to pump 6.On the other hand, pump 6 is connected to the top-portion apertures of top-portion apertures capping 11 by an electromagnetic valve 7.Therefore, reserve tank 2 can be accepted the liquid of discharge from receiver 1, also the liquid of wherein being stored can be turned back in the receiver 1 through pump 6, electromagnetic valve 7 and top-portion apertures.

Shock absorber 3 comprises a gas tank 31, an elastic buffer 32, one safe breathing valve 34.Gas tank 31 is provided with one first perforate 311 and one second perforate 312, and elastic buffer 32 is provided with an admission port 321 and an exhausr port 322.Elastic buffer admission port 321 is connected to receiver gas delivery port 12 by first perforate 311 that trunk line 15 passes gas tank hermetically.Safe breathing valve 34 is installed on the elastic buffer exhausr port 322.In addition, in second perforate 312 of gas tank, be provided with secondary duct 25.

The first breathing valve BP1 is arranged on the trunk line 15, and the second breathing valve BP2 is installed on the secondary duct 25.On the other hand, between the air gate of reserve tank 2 and trunk line 15, connect by the 3rd pipeline 35.The 3rd breathing valve BP3 then is installed on the 3rd pipeline 35 so that elastic buffer 32 can be collected gas next from reserve tank 2.

Pressure sensor has two, the just first and second pressure sensor S1, S2, and a level sensor S3.The first and second pressure sensor S1, S2 are installed in the top of receiver 1 together.Level sensor S3 is installed in the top of reserve tank 2.

Controller 4 can connect each sensor S1, S2 and level sensor S3, electromagnetic valve 7 and 8 and pump 6 by lead.

In addition, in another embodiment,, flame trap 5 can be housed on 25 tops of secondary duct for preventing in secondary duct 25, fire to be introduced from the external world.

The utility model prevents the device principle of work of chemical storage tank to atmospheric contamination and blast:

The mixing air that when the pressure of receiver 1 increases, contains liquid organic material by breathing valve BP1 exhalation, enter the elastic buffer 32 of shock absorber, make in the receiver 1 that pressure P 2 reaches equilibrium of pressure in the pressure P 1=elastic buffer 32, but at this moment the volume of elastic buffer 32 (volume) expands, to make the pure air of gas tank 31 by the pure air of breathing valve BP2 exhalation, just reach balance when P1=P2=P3 (pressure in the gas tank 31)=external atmosphere pressure, the pure air of Pai Chuing is pollution-free to atmosphere like this.

When receiver 1 pressure reduces, then suck the mixing air that contains liquid organic material by breathing valve BP1.The miscellaneous gas that suck this moment is provided by elastic buffer 32, makes its P1=P2 reach new state of equilibrium.And elastic buffer 32 compressions are because due to P3＞P2.At this moment, air are in negative pressure state in the gas tank 31, i.e. P3＜external atmosphere pressure, and breathing valve BP2 starts working like this, sucks, and up to external atmosphere pressure=P3=P2=P1, just stops suction condition.

When surpassing predetermined anticyclonic pressure, this moment P1＞＞P2, and elastic buffer 32 is expanded, when surpassing a certain threshold values, then safe breathing valve 33 is opened, only just the miscellaneous gas that contains the liquid material can be discharged from safety breathing valve 33 under this state, again through breathing valve BP2 this miscellaneous gas of breathing out, but be not have this type of situation to take place in the ordinary course of things.

In the present embodiment, as mentioned above, two gas pressure sensor S1, S2 and a level sensor S3 have been used, can make the explosion potential ratio of receiver 1 use the possibility that the receiver of single probe control explodes to be reduced to Min. like this, specifically please see the example of the advantage of aforementioned general introduction of the present invention for details.

The pressure sensor mechanism of action is: when pressure sensor S1 and S2 detect pressure in the fluid reservoir 1 and surpass the threshold values that presets, then electromagnetic valve 8 is opened by controller 4, liquid in the fluid reservoir 1 flows into standby fluid reservoir 2 at this moment, thereby when the liquid level face of fluid reservoir 1 drops to a safe threshold values, after this moment, pressure sensor S1 and S2 all detected this signal, then by signal of controller 4 outputs electromagnetic valve 8 is closed again, thereby reach the generation of avoiding explosion accident.

If the air pressure of fluid reservoir 1 drops to the lower limit of barometric minimum, and level sensor S3 detects again in the standby fluid reservoir 2 the liquid material, open pump 6 and electromagnetic valve 7 by controller 4 this moment, again the liquid material is transported to fluid reservoir 1 and reaches safe threshold values, just stop the operation of pump 6 and V6 is closed up to the air pressure that pressure sensor S1 and S2 detect in the fluid reservoir 1.

Now see also Fig. 2, there is shown the control flow chart of pressure sensor S1 and S2 and level sensor S3.Present technique adopts two the pressure sensor S1 and the S2 of two kinds or same type, no matter any one is not worked in the middle of them, still can guarantee normal operation, and as long as wherein there is one not work, then can send sound and light alarm immediately, needs repairing in time with caution.

The utility model adopts dual pressure sensor, can think that then the possibility of blast can be reduced to minimum level: a sensor is said, 1/3 possibility for blast, 1/3 be inexplosive possible, and 1/3 is that one of them is bad to two sensors when using simultaneously in addition; Still a normal operation, therefore than descend again with a sensor 39% possible, promptly Bao Zha possibility will drop to below 11% from 50%.

Claims

1. device that prevents chemical storage tank to atmospheric contamination and blast, comprise and have storage liquid input and output mouth, the receiver of top-portion apertures capping, pressure sensor, reserve tank and controller, it is characterized in that: described receiver is provided with a gas delivery port on tank deck, also comprise a shock absorber, one first breathing valve and one second breathing valve, this shock absorber is by a gas tank, one elastic buffer, one safe breathing valve is formed, shown in gas tank be provided with one first perforate and one second perforate, described elastic buffer has an admission port and an exhausr port, described receiver gas delivery port passes first perforate of gas tank and the elastic buffer admission port that is connected to by trunk line, described safe breathing valve is installed on the elastic buffer exhausr port, in addition, described first breathing valve is installed on the trunk line, and described second breathing valve connects gas tank second perforate by secondary duct.

2. the device that prevents chemical storage tank to atmospheric contamination and blast as claimed in claim 1 is characterized in that: described receiver is provided with two pressure sensors, i.e. first and second pressure sensors at its top.

3. the device that prevents chemical storage tank to atmospheric contamination and blast as claimed in claim 1 is characterized in that: described reserve tank is provided with a level sensor in its top.

4. the device that prevents chemical storage tank to atmospheric contamination and blast as claimed in claim 1 is characterized in that: described reserve tank is connected with trunk line by the 3rd pipeline, and on the 3rd pipeline the 3rd breathing valve is set.

5. the device that prevents chemical storage tank to atmospheric contamination and blast as claimed in claim 1, it is characterized in that: also comprise a pump, first and second electromagnetic valve and the bleeder valve, the pump and first electromagnetic valve are connected between reserve tank and the receiver hole capping, bleeder valve is connected storage liquid delivery port, the second electromagnetic valve valve is connected between reserve tank and the bleeder valve, and described controller 4 is electrically connected with first, second pressure sensor, level sensor and first, second electromagnetic valve and pump respectively.

6. the device that prevents chemical storage tank to atmospheric contamination and blast as claimed in claim 1, it is characterized in that: the secondary duct on second breathing valve also is equipped with a flame trap.

7. the device that prevents chemical storage tank to atmospheric contamination and blast as claimed in claim 1 is characterized in that: described elastic buffer is the garden column structure that has corrugation shape.