Waste gas buffer tank

Abstract

The utility model discloses a waste gas buffer tank which comprises a tank body, a first cavity, a second cavity and a third cavity are sequentially arranged on the tank body from inside to outside, the first cavity is communicated with an air inlet, the third cavity is communicated with an air outlet, and the cavities are communicated through two long holes. A partition plate is further arranged between the two long holes and used for forcing waste gas to rotate by one circle in the second cavity and then enter the third cavity. A buffer medium is arranged in the second cavity, and the buffer medium can be an acidic, alkaline and physical adsorption particle column; a splitter plate is arranged in the third cavity, the length of the splitter plate is gradually increased from bottom to top, and the splitter plate is used for dividing the waste gas flow into a plurality of gas flows to flow out successively, so that the waste gas pressure becomes uniform and stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to buffer tank technical field especially relates to a waste gas buffer tank. BACKGROUND

[0002] The waste gas buffer tank is a kind of equipment specially used for industrial waste gas treatment, and its main function is to store waste gas temporarily and slow down the speed and pressure fluctuation of waste gas flow. Waste gas buffer tank is usually composed of tank body, gas inlet, gas outlet, safety valve and the like. Waste gas enters the buffer tank from the gas inlet, is temporarily stored in the tank body, and is slowly discharged through the gas outlet. This design can effectively reduce the pressure fluctuation and impact in the waste gas flow process, and protect the subsequent treatment equipment from damage.

[0003] The Chinese utility model patent with publication number CN206469274U discloses a kind of gas buffer tank, and its technical points are that tank body is divided into inner cavity and outer cavity by using inner and outer cylinder structure, spiral baffle is arranged between inner cavity and outer cavity, and the cavity separated by spiral baffle forms spiral air channel, so that gas moves directionally in the buffer tank, reduces the problem that pressure is unstable due to the mixing of waste gas and air in the buffer tank. But the gas buffer tank provided in the scheme relies on the volume of inner cavity and outer cavity to separate waste gas and air, and air inlet is required for continuous work, otherwise there is pressure difference, which can easily lead to waste gas leakage. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the deficiencies of waste gas buffer tank in the background art, and provides a kind of waste gas buffer tank, to improve the problem that waste gas flows in and out unevenly.

[0005] To achieve the above-mentioned purpose, the technical scheme provided by the utility model comprises:

[0006] A waste gas buffer tank comprises a tank body, the inside of the tank body is sequentially provided with a first cavity, a second cavity and a third cavity with gradually increasing volumes from inside to outside, a gas inlet is arranged at the bottom of the tank body, the gas inlet directly communicates with the first cavity inside the tank body, a first long hole is formed on the surface of the first cavity and communicates with the second cavity, a second long hole is formed on the surface of the second cavity and communicates with the third cavity, and a gas outlet is arranged at the lower part of the third cavity.

[0007] Further, the width of the first long hole gradually increases from bottom to top. The first cavity and the first long hole that gradually increase upwards slow down the flow rate of waste gas.

[0008] Further, the second long hole is isolated from the first long hole by a partition and is arranged in a staggered manner, so that the exhaust gas flowing out of the first long hole must rotate one round along the second cavity to flow into the third cavity from the second long hole, which makes the exhaust gas rotate one round around the storage tank, gives a certain buffer space to the exhaust gas generated unevenly from the production line, and maintains the flow rate and pressure in a relatively stable state.

[0009] Further, a medium column is arranged in the second cavity, which fully utilizes the flow process of the exhaust gas in the second cavity, adsorbs and cleans the exhaust gas, and simultaneously functions as a buffer medium for the gas, preferably activated carbon, and can also be acid-base buffer particles such as calcium carbonate and calcium phosphate according to the acid-base condition of the exhaust gas.

[0010] Further, a plurality of flow dividing plates are arranged in the third cavity, and the flow dividing plates extend radially along the tank body by a certain distance.

[0011] Further, the length of the radially extending flow dividing plate gradually increases from bottom to top, and the flow dividing plate is also inclined downward from the second long hole to the third cavity. During the flow of the exhaust gas from the inlet to the third cavity, liquid droplets, especially oil droplets, are condensed on the flow dividing plate due to the continuous temperature drop. The length of the flow dividing plate gradually increases from bottom to top, and the flow dividing plate is inclined downward, so that the oil droplets on the lower part of the flow dividing plate drop off first, otherwise the oil droplets on the upper part of the flow dividing plate will drop onto the flow dividing plate arranged below, causing unnecessary cleaning problems. The oil droplets accumulate below the third cavity and finally flow out from the exhaust outlet. The viscous oil droplets should also be regularly cleaned.

[0012] Further, a pressure switch is arranged. The pressure switch is in a normally closed state, and is driven to open by the pressure difference when the pressure difference exists. When the pressure switch is opened, the first cavity, the second cavity and the third cavity are directly communicated to the exhaust outlet. When the internal pressure of the exhaust gas buffer tank is too large and is dangerous, the pressure relief work is automatically completed, and the production safety is maintained.

[0013] The advantages and beneficial effects of the utility model are as follows:

[0014] 1. The exhaust gas buffer tank is provided, and the first cavity, the second cavity and the third cavity are arranged in the tank body from inside to outside in a multistage cavity design, and the sizes gradually increase. Such a design can increase the residence time of the exhaust gas in the tank body and improve the exhaust gas treatment efficiency.

[0015] 2、 The exhaust gas needs to pass through the shunt plate after entering the third cavity, a plurality of radially extending shunt plates, the shunt plates gradually increase from bottom to top and are inclined downward, which can further disperse the exhaust gas flow, make the exhaust gas flow out step by step, relieve the influence of the temperature and pressure difference of the exhaust gas on the subsequent treatment, and avoid that the liquid droplets condensation flows from top to bottom on the shunt plates which gradually increase, resulting in too long residence time.

[0016] 3、 A plurality of groups of buffer media can be arranged in the second cavity, and simple primary treatment of the exhaust gas can be realized in the buffer tank. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a sectional view structure schematic diagram of the embodiment of the utility model;

[0018] Figure 2 is a top view structure schematic diagram of the embodiment of the utility model along A-A;

[0019] Figure 3 is a sectional view structure schematic diagram of the embodiment of the utility model along B-B;

[0020] Figure 4 is a side view structure schematic diagram of the embodiment of the utility model along C-C;

[0021] In the drawing:

[0022] 1-first cavity, 2-second cavity, 3-third cavity, 4-inlet, 5-exhaust port, 6-first long hole, 7-second long hole, 8-baffle, 9-medium column, 10-shunt plate, 11-pressure switch. DETAILED DESCRIPTION

[0023] The specific implementation of the utility model will be further described below in combination with the drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0024] EMBODIMENT

[0025] Please refer to Figures 1-4The application discloses a waste gas buffer tank, which comprises a tank body, wherein a first cavity 1, a second cavity 2 and a third cavity 3 with gradually increased volumes are sequentially arranged from inside to outside in the tank body, an air inlet 4 is arranged at the bottom of the tank body and communicates with the first cavity 1 in the tank body, a first long hole 6 is formed in the surface of the first cavity 1 and communicates with the second cavity 2, waste gas rotates one circle in the second cavity 2, a second long hole 7 is formed in the surface of the second cavity 2 and communicates with the third cavity 3, and the lower part of the third cavity 3 is communicated with an exhaust port 5. The width of the first long hole 6 gradually increases from bottom to top. The first long hole 6 with gradually increased width slows down the flow speed of the waste gas. The second long hole 7 is isolated from the first long hole 6 by a partition plate 8 and is arranged in a staggered mode. The waste gas flowing out of the first long hole 6 must rotate one circle along the second cavity 2 to flow into the third cavity 3 from the second long hole 7, so that the waste gas rotates one circle around the tank, a certain buffer space is provided for the waste gas generated unevenly from a production line, and the flow speed and pressure of the waste gas are maintained in a relatively stable state.

[0026] A medium column 9 is arranged in the second cavity 2. The flow process of the waste gas in the second cavity 2 is fully utilized to adsorb and clean the waste gas, meanwhile, the medium column 9 can also be provided with a buffer medium of the gas, preferably activated carbon, and acid-base buffer particles such as calcium carbonate and calcium phosphate can also be arranged according to the acid-base condition of the waste gas. Optionally, the aforementioned buffer medium has multiple types, and the medium column 9 is provided with multiple buffer media respectively. A switch and a hole suitable for the medium column are additionally arranged below the medium column 9, and are used for replacing the medium column. Water can also be directly injected into the air inlet of the waste gas buffer tank to flush the medium column and be discharged from the exhaust port.

[0027] A plurality of flow dividing plates 10 are further arranged in the third cavity 3, and the flow dividing plates 10 extend in a radial direction of the tank body by a certain distance. The flow dividing plates 10 are used for separating a larger waste gas flow into multiple smaller gas flows, and weakening the impact of the waste gas on a subsequent purification process. The lengths of the multiple flow dividing plates 10 gradually increase from bottom to top, and the flow dividing plates 10 are also downwardly inclined in the direction from the second long hole 7 to the third cavity 3. In the process that the waste gas flow flows from the air inlet 4 to the third cavity 3, liquid drops caused by temperature reduction appear on the flow dividing plates 10, especially oil drops on some production lines, the lengths of the flow dividing plates 10 gradually increase from bottom to top, and the flow dividing plates 10 are downwardly inclined, so that the oil drops on the lower flow dividing plates 10 are dripped from the flow dividing plates 10 earlier than the oil drops on the upper flow dividing plates 10, otherwise, the oil drops on the upper flow dividing plates 10 will drip onto the flow dividing plates 10 arranged below, causing unnecessary cleaning problems, and the oil drops on the upper flow dividing plates 10 will slide on the flow dividing plates 10 arranged below, prolonging the dripping time.

[0028] The first cavity 1, the second cavity 2 and the third cavity 3 are further provided with a pressure switch 11. The pressure switch 11 is in a normally closed state, and when a pressure difference exists, the pressure switch 11 is driven to open by the pressure difference, and when opened, directly communicates the first cavity 1, the second cavity 2, the third cavity 3 to the exhaust port 5. When the internal pressure of the exhaust gas buffer tank is too large and is dangerous, the pressure relief work is automatically completed, and the production safety is maintained.

[0029] Working principle:

[0030] Please refer to Figures 1-4 The exhaust gas produced by the production line enters the first cavity from the air inlet. Since the diameter of the first cavity and the first long hole gradually increase in the flow direction of the exhaust gas, the flow rate of the fluid in the pipeline will decrease according to the Bernoulli equation, and a buffering effect is achieved. Then the exhaust gas flows into the second cavity through the first long hole. Referring to Figure 2 Due to the barrier of the partition, the exhaust gas can only rotate clockwise for one turn along the second cavity, and must pass through the medium column in the process of rotating for one turn. On the one hand, the exhaust gas is hindered from directly rushing to the subsequent process of the buffer tank, and on the other hand, the exhaust gas flow is buffered for two sections. The exhaust gas passes through a relatively long buffering route, so that the pressure change is more continuous. Then, the exhaust gas enters the third cavity and the flow distribution plate through the second long hole. It is not difficult to understand that the temperature of the exhaust gas is slightly reduced after passing through two sections of buffering, and a small amount of liquid droplets may condense. The length of the flow distribution plate increases from bottom to top and is inclinedly arranged, so that the liquid droplets of the upper flow distribution plate directly drop into the bottom of the third cavity after sliding, which is convenient for cleaning. In addition, the different lengths of the flow distribution plate also make the exhaust gas in the third cavity flow out from the shorter flow distribution plate first, and the longer flow distribution plate flow out gradually, which has a gradual flow-out effect, and the exhaust gas is buffered for the third time. Finally, the stable exhaust gas flow flows to the next purification process from the exhaust port of the third cavity. A normally closed pressure switch is further arranged, and when the pressure difference between the three cavities is too large, the exhaust gas can flow to other cavities through the pressure switch to complete the pressure relief work and maintain the stable operation of production.

[0031] The above only describes preferred embodiments of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection range of the present application.

Claims

1. An exhaust gas buffer tank, comprising a tank body, characterized in that: The inside of the tank body is provided with a first cavity, a second cavity and a third cavity with gradually increasing volumes from the inside to the outside, and an air inlet is provided at the bottom of the tank body, which is directly connected to the first cavity inside the tank body, a first long hole is provided on the surface of the first cavity and is connected to the second cavity through the long hole, a second long hole is provided on the surface of the second cavity, the second long hole is connected to the third cavity, and the lower part of the third cavity is connected to an exhaust port.

2. The exhaust gas buffer tank according to claim 1, characterized in that: The width of the first long hole gradually increases from bottom to top.

3. The exhaust gas buffer tank according to claim 1, characterized in that: The second long hole is separated from the first long hole by a partition and is staggered, so that the exhaust gas flowing out of the first long hole must rotate along the second cavity for one circle before flowing from the second long hole into the third cavity.

4. The exhaust gas buffer tank according to claim 1, characterized in that: A dielectric column is provided in the second cavity, and a buffer medium is provided in the dielectric column.

5. The exhaust gas buffer tank according to claim 1, characterized in that: A plurality of diverter plates are further provided in the third cavity, and the diverter plates extend a certain distance along the radial direction of the tank body.

6. The exhaust gas buffer tank according to claim 1, characterized in that: The length of the diverter plate increases gradually from bottom to top, and the diverter plate is also inclined downward from the second long hole to the third cavity.

7. The exhaust gas buffer tank according to claim 1, characterized in that: A pressure switch is also provided, and the opening and closing states of the pressure switch respectively connect or block the first cavity, the second cavity, and the third cavity.

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