CN204957456U - Eliminate hydrochloric acid storage device that acid mist discharged - Google Patents

Abstract

The utility model relates to an eliminate hydrochloric acid storage device that acid mist discharged, including the hydrochloric acid storage tank and communicate the hydrochloric acid inlet pipe and the hydrochloric acid discharging pipe of hydrochloric acid storage tank respectively, its characterized in that still includes first connecting pipe, second connecting pipe, blow -down pipe and breathing pipe, holds first washing tank and second washing tank that hydrochloric acid absorption liquid used, the hydrochloric acid storage tank is connected to first connecting pipe one end, and the other end is in first washing tank, blow -down pipe one end is in first washing tank, and the other end is in the first washing tank outside and communicate the outside air, the hydrochloric acid storage tank is connected to second connecting pipe one end, and the other end is located the second washing tank, breathing pipe one end is located the second washing tank, and the other end is located the second washing tank outside and communicates with the outside air. This hydrochloric acid storage device saves breather valve, broken vacuum valve and complicated storage tank vent gas treatment system in that high accuracy, material expected much, only needs two flourishing water washing tanks, and the hydrogen chloride gas of the hydrochloric acid storage tank of just accessible time discharging has avoided the danger that hydrochloric acid storage tank superpressure brought.

Description

A hydrochloric acid storage device for eliminating acid mist discharge

technical field

The utility model relates to the field of hydrochloric acid storage, in particular to a hydrochloric acid storage device for eliminating acid mist discharge.

Background technique

Hydrochloric acid, commonly known as hydrochloric acid, is an aqueous solution of hydrogen chloride (HCl) gas and is a colorless and transparent monobasic strong acid. Hydrochloric acid is extremely volatile, so when you open the container containing concentrated hydrochloric acid, you can see white mist above it. This white mist is a kind of acid mist, which is actually hydrochloric acid produced by the combination of hydrogen chloride volatilization and water vapor in the air. small droplets.

As a common acidic liquid, hydrochloric acid is widely used in the chemical industry. In the field of chemical industry, hydrochloric acid is concentrated and stored in specially prepared anti-corrosion equipment to prevent the concentrated hydrochloric acid from being discharged into the atmosphere due to corrosion of storage equipment, polluting the environment and endangering human health. Because hydrochloric acid is highly corrosive to carbon steel and most stainless steels, large hydrochloric acid storage tanks used in the chemical industry are generally made of hydrochloric acid-resistant FRP. In order to prevent the volatilization of hydrochloric acid and the leakage of hydrogen chloride gas and acid mist from causing corrosion and environmental pollution and endangering human health, effective sealing measures are required for hydrochloric acid storage tanks.

Chinese utility model patent CN201320023164.7 discloses a hydrochloric acid storage tank. The hydrochloric acid storage tank mainly includes a tank body with an outlet pipe on the tank body and a valve on the outlet pipe. A block is plugged in the outlet pipe above the valve, and water is placed in the outlet pipe on the block. CN201320023164.7 aims to use the valve on the outlet pipe to control the output and input in the hydrochloric acid storage tank, and at the same time use the blocking block to further seal the outlet pipe. However, there is no tail gas treatment measure for the hydrochloric acid storage tank in this design plan. Hydrochloric acid requires the valve to have strong corrosion resistance and an absolute seal between the valve and the outlet pipe must be ensured; otherwise, once the valve or block is damaged, the hydrochloric acid storage When the hydrochloric acid in the tank volatilizes, the hydrochloric acid or acid mist is easily discharged into the atmosphere through the gap between the valve and the outlet pipe or the gap between the outlet pipe and the blocking block, polluting the environment.

Aiming at the problem that hydrochloric acid is easily volatilized into the air to pollute the environment during the storage of hydrochloric acid in the hydrochloric acid storage tank, the Chinese utility model patent CN201120398515.3 discloses a breathing valve for a hydrochloric acid storage tank and a hydrochloric acid storage tank with the breathing valve, wherein the breathing valve It includes a valve body and a valve body cover that is tightly matched with the valve body; the valve body includes a first chamber for holding a solution for neutralizing hydrochloric acid and a second chamber for holding a solution for neutralizing hydrochloric acid; the first chamber The body and the second cavity are sealed and isolated from each other; by setting multiple conduits, the acid mist from the hydrochloric acid storage tank can only be emptied after being neutralized by the solution, thereby solving the problem of using the breathing valve to prevent the acid mist from being directly emptied. The problem of environmental pollution. The breathing valve in CN201120398515.3 needs to be made of a material resistant to hydrochloric acid corrosion, and it is required that the breathing valve can be opened with high precision, which increases the difficulty of manufacture. In addition, when the breathing valve is damaged and cannot be opened normally, it is easy to cause overpressure in the hydrochloric acid storage tank, resulting in dangerous accidents such as the rupture of the hydrochloric acid tank.

The existing hydrochloric acid storage tanks have not given a design scheme that can simultaneously solve the above-mentioned problems in terms of overpressure treatment in the hydrochloric acid storage tank, sealing performance of the hydrochloric acid storage tank, and tail gas treatment of the hydrochloric acid storage tank.

Utility model content

The technical problem to be solved by the utility model is to provide a method for the above-mentioned prior art, under the premise of meeting the requirements of reducing equipment complexity and high-precision materials, which can not only seal and store hydrochloric acid, but also effectively treat hydrochloric acid tail gas, avoiding hydrochloric acid tail gas and hydrogen chloride. The formed acid mist is directly discharged to the hydrochloric acid storage device that pollutes the environment in the air and eliminates the discharge of acid mist.

The technical solution adopted by the utility model to solve the above problems is: a hydrochloric acid storage device for eliminating acid mist discharge, including a hydrochloric acid storage tank and a hydrochloric acid feed pipe and a hydrochloric acid discharge pipe respectively connected with the hydrochloric acid storage tank, characterized in that, It also includes a first connecting pipe, a second connecting pipe, an emptying pipe and a suction pipe, and a first washing tank and a second washing tank for holding hydrochloric acid absorption liquid;

One end of the first connecting pipe is connected to the hydrochloric acid storage tank, and the other end of the first connecting pipe is located in the first washing tank and is located below the liquid level of the hydrochloric acid absorbing liquid when the first washing tank holds the hydrochloric acid absorbing liquid;

One end of the vent pipe is located in the first washing tank and is located above the liquid level of the hydrochloric acid absorbing liquid when the first washing tank contains the hydrochloric acid absorbing liquid, and the other end of the vent pipe is located outside the first washing tank and is in contact with the outside world. air connection;

One end of the second connecting pipe is connected to the hydrochloric acid storage tank, and the other end of the second connecting pipe is located in the second washing tank and is located above the liquid level of the hydrochloric acid absorbing liquid when the second washing tank holds the hydrochloric acid absorbing liquid;

One end of the suction pipe is located in the second washing tank and is located below the liquid level of the hydrochloric acid absorption liquid when the second washing tank contains the hydrochloric acid absorption liquid, and the other end of the suction pipe is located outside the second washing tank and connected to the outside world. Air connection.

Further, the connections between the first connecting pipe, the second connecting pipe and the hydrochloric acid storage tank are all located on the top of the hydrochloric acid storage tank.

Further, the liquid level in the vertical direction in the first connecting pipe is higher than the liquid level in the first washing tank when the hydrochloric acid is discharged, and the liquid level in the vertical direction in the second connecting pipe is higher than that in the hydrochloric acid When discharging, it is higher than the liquid level in the second washing tank.

Further, when both the first washing tank and the second washing tank contain the hydrochloric acid absorption liquid, one end of the first connecting pipe is located below the liquid level of the hydrochloric acid absorption liquid|(P ₁ -P ₀ )/1000/9.8 |; one end of the suction pipe is located at |(P ₁ -P ₀ )/1000/9.8| below the liquid level of the hydrochloric acid absorption liquid, where P ₁ is the pressure of the acid tank, and P ₀ is the atmospheric pressure in Pa.

Further, the hydrochloric acid absorption liquid is water or alkaline liquid.

Further, the communication points between the hydrochloric acid storage tank and the hydrochloric acid feed pipe and the hydrochloric acid discharge pipe are respectively located at the upper part and the bottom of the hydrochloric acid storage tank.

Further, both the first washing tank and the second washing tank are provided with a liquid discharge device.

Compared with the prior art, the utility model has the advantages that: when the hydrochloric acid storage tank is fed, the internal pressure in the hydrochloric acid storage tank increases, and the volatilized hydrochloric acid and acid mist enter the first washing tank through the first feeding pipe , and under the action of the internal pressure of the hydrochloric acid storage tank, hydrochloric acid and acid mist are discharged into the hydrochloric acid absorption liquid in the first washing tank in the form of bubbling, and are absorbed by the hydrochloric acid absorption liquid, avoiding the hydrochloric acid and acid mist after volatilization It is discharged into the air to cause environmental pollution, and the second washing tank filled with hydrochloric acid absorption liquid acts as a water seal; when the hydrochloric acid storage tank is discharged, the outside air is greater than the air pressure in the hydrochloric acid storage tank, and the outside air is sucked The pipe enters the second washing tank in the form of bubbling, and enters the hydrochloric acid storage tank through the second feeding pipe, thereby balancing the internal and external pressure in the hydrochloric acid storage tank, and because the liquid level in the vertical direction in the first feeding pipe is high At the height of the liquid level in the first washing tank, the external pressure of the vent pipe connected to the outside air and the pressure in the first feeding pipe reach equilibrium. At this time, the first washing tank containing the hydrochloric acid absorption liquid plays a role of water seal. In the process of eliminating the discharge of acid mist, the hydrochloric acid storage device eliminates the need for high-precision, high-material-required breathing valves, vacuum valves, and complicated storage tank tail gas treatment systems. It only needs two washing tanks filled with water. It can not only store hydrochloric acid safely, avoid overpressure of hydrochloric acid storage tanks, but also prevent acid mist from being directly discharged into the air to pollute the environment.

Description of drawings

Fig. 1 is a structural schematic diagram of a hydrochloric acid storage device for eliminating acid mist discharge in an embodiment of the present invention.

detailed description

The utility model is described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the hydrochloric acid storage device that eliminates acid mist discharge in the present embodiment includes a hydrochloric acid storage tank 1 and a hydrochloric acid feed pipe 2 and a hydrochloric acid discharge pipe 3 communicated with the hydrochloric acid storage tank 1 respectively, as an improvement, The hydrochloric acid storage device among the present embodiment also comprises the first connecting pipe 4, the second connecting pipe 5, the vent pipe 6, the suction pipe 7, the first washing tank 8 and the second washing tank 9; the first washing tank 8 and The second washing tank 9 is used to hold the hydrochloric acid absorption liquid capable of absorbing hydrochloric acid. For example, the hydrochloric acid absorption liquid can be selected to use water or alkaline liquid. Wherein, in the present embodiment, the hydrochloric acid absorption liquid contained in the first washing tank 8 and the second washing tank 9 selects water; wherein,

One end of the first connecting pipe 4 is connected with the hydrochloric acid storage tank 1, and the other end of the first connecting pipe 4 is located in the first washing tank 8 and is positioned below the liquid level of the water when the first washing tank 8 holds water;

One end of the emptying pipe 6 is located in the first washing tank 8 and is positioned above the liquid level of the water when the first washing tank 8 contains water, and the other end of the emptying pipe 6 is located outside the first washing tank 8 and communicated with the outside air Wherein, the purpose that the first connection pipe 4 and vent pipe 6 are set up in this way is, when the hydrochloric acid storage device charging makes the hydrochloric acid storage tank 1 bear internal pressure, the internal pressure in the hydrochloric acid storage tank 1 discharges with the form of bubbling In the hydrochloric acid storage tank 1, the hydrochloric acid and acid mist discharged through the first connecting pipe 4 are fully absorbed by the water, so as to avoid environmental pollution caused by directly putting the hydrochloric acid and acid mist into the air.

One end of the second connecting pipe 5 is connected to the hydrochloric acid storage tank 1, and the other end of the second connecting pipe 5 is located in the second washing tank 9 and is positioned above the liquid level of the water when the second washing tank 9 holds water;

One end of the suction pipe 7 is located in the second washing tank 9 and is positioned below the liquid level of the water when the second washing tank 9 holds water, and the other end of the suction pipe 7 is located outside the second washing tank 9 and communicates with the outside air. . The purpose of the second connecting pipe 5 and the suction pipe 7 being arranged in this way is that when the hydrochloric acid storage device discharges the hydrochloric acid storage tank 1 to bear the external pressure, the hydrochloric acid storage tank 1 inhales the outside air through the suction pipe 7 in the form of bubbling, The water in the second washing tank 9 acts as a water seal, so that the water in the second washing tank 9 will not flow back into the hydrochloric acid storage tank 1 .

The purpose of containing the hydrochloric acid absorption liquid in the first washing tank 8 and the second washing tank 9 is to ensure that the hydrochloric acid storage device can balance the inside and outside of the hydrochloric acid storage tank 1 when the feed pressure is released and the material is sucked. Pressure, thereby preventing the hydrochloric acid storage tank 1 from causing dangerous accidents due to internal overpressure.

When hydrochloric acid and acid mist in the hydrochloric acid storage tank 1 entered in the first washing tank 8 through the first connecting pipe 4, because the first connecting pipe 4 one end was located below the water surface, the hydrogen chloride gas and hydrochloric acid in the acid mist could be absorbed by the water like this. for maximum absorption.

In order to not only ensure that the hydrochloric acid storage device is fed, the hydrochloric acid and acid mist can be fully absorbed by the water in the first washing tank 8, but also ensure that the internal pressure in the hydrochloric acid storage tank 1 is balanced when the hydrochloric acid storage device is discharged, further, The joints of the first connecting pipe 4 , the second connecting pipe 5 and the hydrochloric acid storage tank 1 are located on the top of the hydrochloric acid storage tank 1 .

In order to avoid the influence of external air on the water contained in the first washing tank 8 through the vent pipe 6 when the hydrochloric acid storage device is discharged, the water in the first washing tank 8 enters the hydrochloric acid storage through the first connecting pipe 4. Tank 1, further, the liquid level height in the vertical direction in the first connecting pipe 4 is higher than the liquid level height in the first washing tank 8 when hydrochloric acid is discharged, and the liquid level height in the vertical direction in the second connecting pipe 5 Higher than the liquid level in the second washing tank 9 when hydrochloric acid is discharged.

In order to ensure that when the internal pressure of the hydrochloric acid storage tank 1 and the external pressure of the hydrochloric acid storage tank 1 reach a critical value, the pressure can be relieved in the form of bubbling in the first washing tank 8 when the hydrochloric acid is fed, and the discharge of the hydrochloric acid storage tank 1 can be realized. At this time, the suction pipe 7 absorbs air in the form of bubbling in the second washing tank 9, and further, when the first washing tank 8 and the second washing tank 9 are filled with hydrochloric acid absorption liquid, one end of the first connecting pipe 4 is located at Below the liquid level of the hydrochloric acid absorption liquid |(P ₁ -P ₀ )/1000/9.8|, one end of the suction pipe 7 is located at |(P ₁ -P ₀ )/1000/9.8| below the liquid level of the hydrochloric acid absorption liquid, Where P ₁ is the acid tank pressure, P ₀ is the atmospheric pressure in Pa.

In order to further improve the utilization rate of storage space in the hydrochloric acid storage tank 1, and discharge the remaining hydrochloric acid and acid mist in the hydrochloric acid storage tank 1 to the greatest extent, further, the hydrochloric acid storage tank 1 and the hydrochloric acid feed pipe 2, the hydrochloric acid discharge pipe 3 The connecting points of are located at the upper part and the bottom of the hydrochloric acid storage tank 1 respectively.

In order to remove the water that has absorbed the acid mist in the first washing tank 8 and the second washing tank 9 in time, and replace with new hydrochloric acid absorption liquid, the first washing tank 8 and the second washing tank 9 are all provided with a liquid discharge device 10 .

Below in conjunction with Fig. 1, the working situation of the hydrochloric acid storage device that eliminates acid mist discharge in the present embodiment is described:

(1) Water is filled in the first washing tank 8 and the second washing tank 9, and one end of the first connecting pipe 4 is below the water level in the first washing tank 8, and one end of the suction pipe 7 is in the second washing tank 8. Below the water liquid level in the washing tank 9;

(2) When the hydrochloric acid storage device feeds, and when the internal pressure in the hydrochloric acid storage tank 1 reaches a certain value, the hydrochloric acid and the acid mist volatilized in the hydrochloric acid storage tank 1 enter in the first washing tank 8 through the first connecting pipe 4;

(3) Hydrochloric acid and acid mist are affected by the internal pressure of the hydrochloric acid storage tank 1, and are discharged in the form of bubbling at the end of the first connecting pipe 4 located below the liquid surface, and the discharged hydrochloric acid and acid mist are absorbed by water, avoiding direct insertion air pollution;

Because one end of the second connecting pipe 5 in the second washing tank 9 is above the water level, the internal pressure of the hydrochloric acid storage tank 1 will not affect the suction pipe 7, and the second washing tank 9 is connected to the hydrochloric acid storage tank 1. The purpose of water sealing;

(4) When the hydrochloric acid storage device is discharging, and when the internal pressure in the hydrochloric acid storage tank 1 is lower than the external air pressure, the external air enters below the water surface of the second washing tank 9 through the suction pipe 7, and the external air then bubbles The form enters in the second washing tank 9, and has realized the balance of pressure in the hydrochloric acid storage tank 1 by the second connecting pipe 5;

Because one end of the first connecting pipe 4 is located below the water surface in the first washing tank 8, and the liquid level height in the vertical direction in the first connecting pipe 4 is higher than the water level height in the first washing tank 8, therefore, the external air pressure does not Water will enter into the hydrochloric acid storage tank 1, thereby fulfilling the purpose of water sealing the hydrochloric acid storage tank 1 by the first washing tank 8 in real time.

In the process of ensuring the elimination of acid mist discharge, the hydrochloric acid storage device in this embodiment eliminates the need for high-precision, high-material-required breathing valves, vacuum breaking valves, and complicated storage tank tail gas treatment systems, and only requires two water-filled tanks. The washing tank can discharge the hydrochloric acid and acid mist in the hydrochloric acid storage tank 1 in time, avoiding the danger caused by the overpressure of the hydrochloric acid storage tank 1.

Claims (7)

1. A hydrochloric acid storage device for eliminating acid mist discharge, comprising a hydrochloric acid storage tank and a hydrochloric acid feed pipe and a hydrochloric acid discharge pipe communicated with the hydrochloric acid storage tank respectively, characterized in that it also includes a first connecting pipe, a second connecting pipe , emptying pipe and suction pipe, the first washing tank and the second washing tank for holding the hydrochloric acid absorption liquid; One end of the first connecting pipe is connected to the hydrochloric acid storage tank, and the other end of the first connecting pipe is located in the first washing tank and is located below the liquid level of the hydrochloric acid absorbing liquid when the first washing tank holds the hydrochloric acid absorbing liquid; One end of the vent pipe is located in the first washing tank and is located above the liquid level of the hydrochloric acid absorbing liquid when the first washing tank contains the hydrochloric acid absorbing liquid, and the other end of the vent pipe is located outside the first washing tank and is in contact with the outside world. air connection; One end of the second connecting pipe is connected to the hydrochloric acid storage tank, and the other end of the second connecting pipe is located in the second washing tank and is located above the liquid level of the hydrochloric acid absorbing liquid when the second washing tank holds the hydrochloric acid absorbing liquid; One end of the suction pipe is located in the second washing tank and is located below the liquid level of the hydrochloric acid absorption liquid when the second washing tank contains the hydrochloric acid absorption liquid, and the other end of the suction pipe is located outside the second washing tank and connected to the outside world. Air connection. 2. The hydrochloric acid storage device for eliminating acid mist discharge according to claim 1, characterized in that, the joints of the first connecting pipe, the second connecting pipe and the hydrochloric acid storage tank are all located on the top of the hydrochloric acid storage tank. 3. The hydrochloric acid storage device for eliminating acid mist discharge according to claim 1 or 2, characterized in that, the liquid level in the vertical direction in the first connecting pipe is higher than the first washing tank when the hydrochloric acid is discharged The liquid level height in the vertical direction in the second connecting pipe is higher than the liquid level height in the second washing tank when the hydrochloric acid is discharged. 4. The hydrochloric acid storage device for eliminating acid mist discharge according to claim 3, characterized in that, when both the first washing tank and the second washing tank are filled with hydrochloric acid absorption liquid, one end of the first connecting pipe is located at Below the liquid level of the hydrochloric acid absorption liquid | _{(P 1 -P 0 )} /1000/9.8| , where P ₁ is the pressure of the acid tank, P ₀ is the atmospheric pressure, and the unit is Pa. 5. The hydrochloric acid storage device for eliminating acid mist discharge according to claim 1 or 2, wherein the hydrochloric acid absorbing liquid is water or alkaline liquid. 6. the hydrochloric acid storage device that eliminates acid mist discharge according to claim 1 or 2, is characterized in that, the communicating place of described hydrochloric acid storage tank and hydrochloric acid feed pipe, hydrochloric acid discharge pipe is respectively correspondingly positioned at the side of hydrochloric acid storage tank top, bottom. 7. The hydrochloric acid storage device for eliminating acid mist discharge according to claim 6, characterized in that, both the first washing tank and the second washing tank are provided with a liquid discharge device.