Efficient mist catching device for coal gas at ammonium sulfate outlet
By designing a multi-layer spiral channel and wire brush, the problems of poor acid mist capture effect and equipment blockage in coke oven gas are solved, and effective capture of small and medium-sized acid droplets and recycling of acid liquid are realized. Extend the life of the equipment.
Patent Information
- Application Number
- CN202421355510.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-06-14
AI Technical Summary
When capturing acid mist in coke oven gas, the baffle plate has poor capture effect on small and medium-sized acid droplets, the mesh structure is prone to blockage and increases sulfuric acid consumption, affecting the equipment life.
An efficient mist-catching device including a shell, multiple inclined plates, spiral channels and wire brushes was designed. The acid mist was separated multiple times by centrifugal force and vibrator, and the acid liquid of different volumes was achieved through the wire brush adsorption and diverting of the wire brush. The capture of drips eliminates the mesh structure to avoid clogging and acid loss.
It realizes efficient capture of acid mist in the coking oven gas, avoids equipment corrosion and acid loss, extends the service life of the equipment, and reduces sulfuric acid consumption.
Smart Images
Figure CN222173399U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal gas purification, in particular to an efficient mist capture device for ammonium sulfate outlet coal gas. Background Art
[0002] During coking, in addition to about 75% of coal turning into coke, about 25% will generate various chemical products and coal gas. It can be seen that the recovery and rational utilization of chemical products and coal gas are of great significance to the comprehensive utilization of coal resources, and the purification process of coke oven gas is the process of collecting some chemical products in the coal gas. Generally speaking, clean coal gas can be obtained after coke oven gas has gone through processes such as cold drum electric capture and ammonia evaporation, desulfurization, ammonium sulfate, and benzene elution. It can be used as a heat source or as a raw material for the production of other chemicals. The ammonium sulfate, namely the ammonium sulfate process, mostly refers to the use of a saturator method to recover ammonia in coal gas. The specific process is: the coal gas from the desulfurization process enters the gas preheater for preheating, and then enters the saturator. The ammonia in the coal gas reacts with sulfuric acid to obtain ammonium sulfate. The coal gas with ammonia removed is discharged from the saturator. However, since the coal gas will directly contact with sulfuric acid in the protector, a certain amount of acid mist will be entrained when the coal gas is discharged. These acid mists will not only corrode the gas pipeline and subsequent equipment, causing damage to the gas pipeline and equipment, but also cause the loss of sulfuric acid in the saturator, increase the consumption of sulfuric acid, and affect the balance inside the saturator. In order to avoid the above problems, a mist collector is required to remove the acid mist in the ammonium sulfate outlet coal gas.
[0003] At present, baffles are usually used to capture acid mist from coal gas. Baffles can effectively capture large-volume acid droplets, but the capture effect on small and medium-volume acid droplets is poor. There is still a large amount of acid mist in the coal gas, which will corrode the gas pipeline and subsequent process equipment and reduce the service life of the equipment; secondly, when capturing acid mist, some mesh structures are also used to capture mist, but the mesh structure has problems such as large volume, large resistance, and easy clogging. Therefore, it is an objective need to develop an efficient mist capture device for ammonium sulfate outlet coal gas with good capture effect, not easy to clog, and can avoid sulfuric acid loss. Utility Model Content
[0004] The utility model aims to provide an efficient ammonium sulfate outlet gas mist capture device which has good capture effect, is not easy to be blocked and can avoid the loss of sulfuric acid.
[0005] The purpose of the utility model is achieved in this way, including a shell and a liquid discharge port arranged at the bottom of the shell, a plurality of inclined plates are arranged at intervals in the upper and lower parts of the shell, the lower end of each inclined plate is processed with a lower liquid port, the plurality of inclined plates divide the internal space of the shell into a plurality of fog catching chambers at the upper part and a liquid storage chamber at the bottom, each fog catching chamber is divided into a continuous spiral channel by a spiral plate, the air outlet end of the spiral channel located at the upper part is connected with the air inlet end of the spiral channel located at the lower part through an air vent, a plurality of liquid holes are processed along the spiral direction of the bottom of the spiral plate, a spiral strip is arranged in the spiral channel, a plurality of vertical rods are arranged at intervals along the spiral direction of the spiral strip, a wire brush is arranged on the vertical rod, an air inlet pipe is arranged on the side wall of the shell at the air inlet end of the uppermost spiral channel, and an exhaust pipe extending to the outside of the shell is connected to the air outlet end of the lowermost spiral channel.
[0006] Furthermore, the inclination directions of the two upper and lower adjacent inclined plates are opposite.
[0007] Furthermore, a vibrator is arranged on the shell side wall of each mist catching chamber, a vibrating rod is arranged on the vibrator, and the end of the vibrating rod is extended into the mist catching chamber and connected with the spiral strip.
[0008] Furthermore, a condenser is arranged on the air intake pipe.
[0009] Furthermore, the flow areas of the multiple spiral channels gradually decrease from top to bottom.
[0010] Furthermore, a liquid level sensor is arranged in the liquid storage cavity.
[0011] Furthermore, a plurality of vertical strip-shaped baffles are arranged at intervals on the outer side wall of the spiral channel.
[0012] When the utility model is in use, the coke oven gas after desulfurization and deammoniation treatment is discharged from the outlet of the ammonium sulfate process, that is, from the exhaust port of the saturator, enters the mist catching chamber at the top of the device through the air inlet pipe, and flows in a spiral along the spiral channel. Under the action of centrifugal force, the acid mist mixed in the coke oven gas will continuously flow outward due to its large mass until it adheres to the side wall of the outer side of the spiral channel and continuously gathers. Finally, under the action of gravity, it flows along the outer wall of the spiral channel to the inclined plate at the bottom of the spiral channel, and then flows toward the lower end of the inclined plate through each liquid through hole, and falls from the lower liquid port at the lower end of the inclined plate to the next mist catching chamber. By analogy, the collected acid liquid finally falls into the liquid storage chamber, and when the coke oven gas flows through the gas outlet end of the previous spiral channel, it flows into the next spiral channel through the air vent, flows in a spiral again, and separates the acid mist in the coke oven gas again. By analogy, the coke oven gas will undergo an acid mist separation when it flows through each spiral channel, and finally the coke oven gas with the acid mist removed is discharged from the exhaust pipe. In the utility model, on the one hand, a plurality of spiral channels connected up and down are provided, and the acid mist in the coke oven gas is separated multiple times by the action of centrifugal force. On the other hand, a plurality of steel wire brushes are provided in the spiral channels. The steel wire brushes have two functions. One is that the steel wire brushes have a large specific surface area and a liquid gathering effect. When the coke oven gas hits the steel wire brushes, the steel wire brushes can absorb the liquid acid mist therein. The second is that the steel wire brushes have the function of changing the direction of the coke oven gas. After being blocked by the steel wire brushes, the coke oven gas will be diverted to both sides thereof, so that the diverted coke oven gas will flow toward the side wall of the spiral channel and collide with the side wall. , and then remove the liquid acid mist in the coke oven gas. The above two aspects of the settings process the acid mist in the coke oven gas at the same time, and can capture acid droplets of different sizes at the same time, and have a good acid mist capture effect; secondly, the traditional mesh fog capture structure is eliminated, which is not easy to clog and has small air flow resistance; in addition, the captured acid mist will continue to gather in the liquid storage chamber, and can be discharged as needed and returned to the saturator in the ammonium sulfate, and the deammoniation treatment of the coke oven gas is circulated to prevent the loss of acid liquid, reduce the consumption of acid liquid, avoid the subsequent pipelines and equipment from being overlooked by the acid liquid, and extend their service life. In summary, the utility model has the advantages of good capture effect, not easy to clog, and can avoid the loss of sulfuric acid. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0014] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA;
[0015] In the figure: 1-shell, 2-drain port, 3-inclined plate, 4-lower liquid port, 5-mist capture chamber, 6-liquid storage chamber, 7-spiral plate, 8-spiral channel, 9-vent, 10-liquid hole, 11-spiral strip, 12-wire brush, 13-inlet pipe, 14-exhaust pipe, 15-vibrator, 16-condenser, 17-liquid level sensor, 18-baffle. DETAILED DESCRIPTION
[0016] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the present invention belong to the protection scope of the present invention.
[0017] like Figures 1-2 As shown, the utility model includes a shell 1 and a liquid discharge port 2 arranged at the bottom of the shell 1, a plurality of inclined plates 3 are arranged at intervals in the upper and lower parts of the shell 1, the inclination angle of the inclined plates 3 can be determined according to actual needs, and a lower liquid port 4 is processed at the lower end of each inclined plate 3, and the plurality of inclined plates 3 divide the internal space of the shell 1 into a plurality of fog catching chambers 5 at the upper part and a liquid storage chamber 6 at the bottom, and each fog catching chamber 5 is divided into a continuous spiral channel 8 by a spiral plate 7, and the air outlet end of the spiral channel 8 located at the upper part is connected with the air inlet end of the spiral channel 8 located at the lower part through an air vent 9, and a plurality of liquid holes 10 are processed at the bottom of the spiral plate 7 along its spiral direction, and a spiral strip 11 is arranged in the spiral channel 8, and a plurality of vertical rods are arranged at intervals along its spiral direction on the spiral strip 11, and a wire brush 12 is arranged on the vertical rod, and an air inlet pipe 13 is arranged on the side wall of the shell 1 at the air inlet end of the uppermost spiral channel 8, and an air outlet end of the lowermost spiral channel 8 is connected with an exhaust pipe 14 extending to the outside of the shell 1.
[0018] When the utility model is in use, the coke oven gas after desulfurization and deammoniation treatment is discharged from the outlet of the ammonium sulfate process, that is, from the exhaust port of the saturator, and enters the fog collecting chamber 5 at the top of the device through the air inlet pipe 13, and flows along the spiral channel 8 in a spiral manner. Under the action of centrifugal force, the acid mist mixed in the coke oven gas will continue to flow outward due to its large mass, until it adheres to the side wall outside the spiral channel 8 and continues to gather. Finally, under the action of gravity, it flows along the outer wall of the spiral channel 8 to the inclined plate 3 at the bottom of the spiral channel 8, and then Then it passes through each liquid through hole 10 and flows toward the lower end of the inclined plate 3, and falls from the lower liquid port 4 at the lower end of the inclined plate 3 to the next mist catching chamber 5, and so on. The collected acid liquid finally falls into the liquid storage chamber 6, and when the coke oven gas flows through the gas outlet end of the previous spiral channel 8, it flows into the next spiral channel 8 through the vent hole 9, and flows in a spiral again to separate the acid mist in the coke oven gas again. By analogy, the coke oven gas will undergo an acid mist separation when it flows through each spiral channel 8, and finally the coke oven gas with the acid mist removed is discharged from the exhaust pipe 14. In the present invention, on the one hand, a plurality of spiral channels 8 connected up and down are provided, and the acid mist in the coke oven gas is separated multiple times by the action of centrifugal force. On the other hand, a plurality of steel wire brushes 12 are provided in the spiral channel 8. The steel wire brush 12 has two functions. One is that the steel wire brush 12 has a large specific surface area and a liquid gathering effect. When the coke oven gas hits the steel wire brush 12, the steel wire brush 12 can absorb the liquid acid mist therein. The second is that it has the function of changing the direction of the coke oven gas. After being blocked by the steel wire brush 12, the coke oven gas will be diverted to both sides thereof, so that the diverted coke oven gas will flow toward the side wall of the spiral channel 8. , collides with the side wall, and then removes the liquid acid mist in the coke oven gas. The above two aspects of the arrangement process the acid mist in the coke oven gas at the same time, and can capture acid droplets of different sizes at the same time, and have a good acid mist capture effect; secondly, the traditional mesh mist capture structure is eliminated, which is not easy to be blocked and has small air flow resistance; in addition, the captured acid mist will continue to gather in the liquid storage cavity, which can be discharged as needed and returned to the saturator in the ammonium sulfate, and the deammoniation treatment of the coke oven gas is circulated to prevent the loss of acid liquid, reduce the consumption of acid liquid, avoid the subsequent pipelines and equipment from being overlooked by the acid liquid, and extend their service life.
[0019] The inclination directions of the two adjacent inclined plates 3 are opposite. This arrangement makes the cross-sectional area of the same circle of spiral channel 8 in a changing state. When the coke oven gas flows inside it, the flow rate also changes due to the change in the flow area, which in turn plays a role in disturbing the airflow and promoting the separation of acid mist droplets from the coke oven gas.
[0020] A vibrator 15 is provided on the side wall of the shell 1 of each fog catching chamber 5, and a vibrating rod is provided on the vibrator 15. The end of the vibrating rod is extended into the fog catching chamber 5 and connected with the spiral strip 11. When the utility model is in operation, a large amount of acid mist droplets will adhere to the wire brush 12, and then continue to condense, and finally drip from the wire brush 12. In actual use, it is found that when the acid liquid adhered to the wire brush 12 reaches saturation, its efficiency in adsorbing the acid liquid will decrease, thereby affecting the fog catching effect of the entire device. In order to prevent the above-mentioned problem, a vibrator 15 is provided. When the vibrator 15 is started, the vibration generated by the vibrator 15 is transmitted to the spiral strip 11 through the vibrating rod, thereby causing all the wire brushes 12 to vibrate, and the acid mist adhered to the wire brush 12 is shaken off, so that the acid mist on the wire brush 12 cannot reach a saturated state, and the acid mist in the coke oven gas can be continuously and efficiently adsorbed, thereby improving the fog catching efficiency of the acid mist.
[0021] A condenser 16 is provided on the air inlet pipe 13. The condenser 16 is an existing device that can reduce the temperature of the coke oven gas, thereby promoting the liquefaction of the acid mist in the coke oven gas to form droplets with larger particles, which are more convenient to be thrown out by centrifugal force, thereby improving the capture effect and efficiency of the acid mist.
[0022] The flow areas of the multiple spiral channels 8 gradually decrease from top to bottom. In the utility model, after the coke oven gas enters the shell 1, it will first enter the spiral channel 8 of the topmost mist catching chamber 5, and then flow downward in sequence, flowing into the spiral channels 8 in each mist catching chamber 5 in sequence. When the flow area of the spiral channel 8 gradually decreases, that is, the cross-sectional area of the spiral channel 8 becomes smaller, the swirl flow rate of the coke oven gas will undoubtedly be accelerated, thereby increasing the centrifugal force, making it easier to separate the smaller particles of acid mist in the coke oven gas, and improving the acid droplet mist catching efficiency of the entire device.
[0023] A liquid level sensor 17 is provided in the liquid storage chamber 6. The liquid level sensor 17 is an existing instrument for detecting the liquid level of the acid liquid in the liquid storage chamber 6, so as to discharge the acid liquid in the liquid storage chamber 6 in time after the liquid level reaches a certain height. In actual use, the acid liquid can be returned to the saturator to continue to deammoniate the coke oven gas, so as to achieve the purpose of recovering the acid liquid and improve the utilization rate of the acid liquid.
[0024] A plurality of vertical strip-shaped baffles 18 are arranged at intervals on the outer side wall of the spiral channel 8. The baffles 18 have two functions. First, when the utility model is in operation, the heavier acid mist droplets will continuously flow outward under the action of centrifugal force, and the acid mist droplets with larger particles will be directly thrown onto the side wall of the spiral channel 9, while the acid mist droplets with slightly smaller particles may not be thrown out, but still be mixed in the coke oven gas and flow along the outer position of the spiral channel 9. At this time, they are blocked by the baffles 18, and under the action of impact, these slightly smaller acid mist droplets in the coke oven gas can be separated; second, the setting of the baffles 18 can cause the coke oven gas to generate eddy currents near the side wall of the spiral channel 8, thereby improving the gas-liquid separation efficiency and quickly separating the acid mist droplets in the coke oven gas.
Claims
1. An efficient gas mist capture device for ammonium sulfate outlet, comprising a housing (1) and a liquid discharge port (2) arranged at the bottom of the housing (1), characterized in that The shell (1) has a plurality of inclined plates (3) arranged at intervals in the upper and lower parts, and a lower liquid port (4) is processed at the lower end of each inclined plate (3). The plurality of inclined plates (3) divide the internal space of the shell (1) into a plurality of mist-catching chambers (5) at the upper part and a liquid storage chamber (6) at the bottom. Each mist-catching chamber (5) is divided into a continuous spiral channel (8) by a spiral plate (7). The air outlet end of the spiral channel (8) at the upper part is connected to the air inlet end of the spiral channel (8) at the lower part through an air vent (9). The bottom of the spiral plate (7) is machined with a plurality of liquid holes (10) along the spiral direction thereof, a spiral strip (11) is arranged in the spiral channel (8), a plurality of vertical rods are arranged at intervals on the spiral strip (11) along the spiral direction thereof, a wire brush (12) is arranged on the vertical rod, an air intake pipe (13) is arranged on the side wall of the shell (1) at the air intake end of the uppermost spiral channel (8), and an air outlet pipe (14) extending to the outside of the shell (1) is connected to the air outlet end of the lowermost spiral channel (8).
2. The high-efficiency mist capture device for ammonium sulfate outlet gas according to claim 1, characterized in that : The inclination directions of the two adjacent inclined plates (3) are opposite.
3. The high-efficiency mist capture device for ammonium sulfate outlet gas according to claim 1, characterized in that A vibrator (15) is provided on the side wall of the shell (1) of each mist catching chamber (5), and a vibrating rod is provided on the vibrator (15). The end of the vibrating rod extends into the mist catching chamber (5) and is connected to the spiral strip (11).
4. The high-efficiency mist capture device for ammonium sulfate outlet gas according to claim 1, characterized in that The air inlet pipe (13) is provided with a condenser (16).
5. The high-efficiency mist capture device for ammonium sulfate outlet gas according to claim 1, characterized in that : The flow area of the multiple spiral channels (8) gradually decreases from top to bottom.
6. The highly efficient mist capture device for ammonium sulfate outlet gas according to claim 1, characterized in that A liquid level sensor (17) is arranged in the liquid storage chamber (6).
7. The high-efficiency mist capture device for ammonium sulfate outlet gas according to claim 1, characterized in that A plurality of vertical baffles (18) are arranged at intervals on the outer side wall of the spiral channel (8).