A gas contact reactor

Abstract

The present invention discloses a gas contact reactor, comprising: a reaction tower, wherein a plurality of cross-arranged horizontal baffles are fixed to the inner sidewalls of the reaction tower along its height, each of the horizontal baffles and the reaction tower forming a serpentine flow channel. A horizontal orifice plate is fixed between each of the horizontal baffles and the inner sidewalls of the reaction tower, each of the horizontal orifice plates dividing the flow channel into a plurality of interconnected subspaces, each of which is provided with a vertical orifice plate. The vertical orifice plates are provided with first through-holes through which wastewater flows obliquely downward, and the first through-holes on adjacent vertical orifice plates are horizontally symmetrically distributed. The horizontal orifice plates are provided with second through-holes through which wastewater flows obliquely upward, and the second through-holes on the cross-arranged horizontal orifice plates are horizontally symmetrically distributed. This invention overcomes the problems of low ozone utilization and unsatisfactory wastewater decontamination effects in existing ozone contact reaction towers.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental protection treatment, in particular to a gas contact reactor. Background Art

[0002] Ozone oxidation uses ozone as an oxidant to purify and disinfect wastewater. Due to its strong decontamination ability, no chemical agents are added during the treatment process, and no solid waste is generated, it is widely used in environmental protection and chemical industry.

[0003] The commonly used ozone contact reaction tower has a vertical cylindrical container as its main body, and a water distribution pipe and an aeration plate are provided at the bottom. Ozone and wastewater enter the ozone contact reaction tower through the water distribution pipe and the aeration plate. Since ozone has a low solubility in water, it will diffuse upward rapidly after escaping from the aeration plate. Under the action of pressure, the diffusion trajectory is approximately a straight line from bottom to top. The time it stays in the wastewater is extremely short. Most of the ozone does not have time to react with the wastewater for oxidation and is directly discharged from the tail gas outlet at the top of the ozone contact reaction tower. The ozone utilization rate is low, and the decontamination effect on the wastewater is not ideal. Summary of the Invention

[0004] The present invention provides a gas contact reactor to overcome the problems of low ozone utilization rate and unsatisfactory decontamination effect on wastewater in the existing ozone contact reaction tower.

[0005] In order to achieve the above object, the technical solution of the present invention is:

[0006] A gas contact reactor comprises: a reaction tower, wherein a plurality of cross-arranged horizontal partitions are fixed to the inner sidewalls of the reaction tower along the height direction of the reaction tower, each of the horizontal partitions and the reaction tower forming a serpentine flow channel, a horizontal orifice plate is fixed between each of the horizontal partitions and the inner sidewalls of the reaction tower, each of the horizontal orifice plates divides the flow channel into a plurality of interconnected subspaces, and each of the subspaces is provided with a vertical orifice plate;

[0007] The vertical orifice plate is provided with first through holes, and the wastewater passing through the first through holes flows obliquely downward, and the first through holes on adjacent vertical orifice plates are horizontally symmetrically distributed;

[0008] The horizontal orifice plates are provided with second through holes, and the wastewater passing through the second through holes flows obliquely upward. The second through holes on the cross-arranged horizontal orifice plates are horizontally symmetrically distributed.

[0009] Furthermore, it also includes an inclined block, wherein the inclined surface of the inclined block is provided with steps;

[0010] The inclined block is arranged opposite to the vertical orifice plate, and the height of the inclined block gradually increases from one end close to the vertical orifice plate to the other end, and the wastewater passing through the first through hole flows toward the step;

[0011] The inclined block is arranged opposite to the horizontal orifice plate, and the height of the inclined block gradually increases from one end close to the horizontal orifice plate to the other end, and the wastewater passing through the second through hole flows toward the step.

[0012] Furthermore, a sawtooth-shaped protrusion is provided in each of the first through hole and the second through hole.

[0013] Furthermore, the diameter of the first through hole is 1 mm to 10 mm, and the diameter of the second through hole is 1 mm to 10 mm.

[0014] Furthermore, the angle formed between the axis of the first through hole and the radial direction of the reaction tower is 15° to 75°, and the angle formed between the axis of the second through hole and the radial direction of the reaction tower is 15° to 75°.

[0015] Further, it includes a water distribution pipe and a water outlet pipe;

[0016] The water distribution pipe is connected to the aeration plate in the subspace at the bottom of the reaction tower, and the water outlet pipe is connected to the subspace at the top of the reaction tower.

[0017] Furthermore, a tail gas discharge port is provided at the top of the reaction tower, and an isolation valve is provided on the tail gas discharge port.

[0018] Furthermore, one end of the isolation valve is connected to the tail gas discharge port, and the other end of the isolation valve is connected to the gas tank inlet. A fan is provided between the gas tank outlet and the water distribution pipe.

[0019] Furthermore, the gas tank is connected to an ozone concentration monitor, the gas tank is provided with a discharge pipe, and the discharge pipe is provided with a discharge valve. The ozone concentration monitor can open and close the discharge valve according to the monitored ozone concentration in the gas tank.

[0020] Furthermore, the gas storage tank is provided with a safety valve.

[0021] Beneficial effects of the present invention:

[0022] The gas contact reactor provided by the present invention forms a serpentine flow path through cross-arranged horizontal partitions and a reaction tower, so that ozone and wastewater flow in a zigzag manner, extending the path required for the ozone and wastewater to react, increasing the contact time between ozone and wastewater in the reactor, facilitating the full reaction between ozone and impurities in the wastewater, and thus improving ozone utilization efficiency.

[0023] The first through-holes on the vertical orifice plate and the second through-holes on the horizontal orifice plate cause the wastewater to form turbulent flow, increasing the flow resistance of ozone and wastewater. Multiple vertical orifice plates and horizontal orifice plates alternately block the flow, increasing the residence time of ozone in the reaction tower, further improving the ozone utilization rate and effectively improving the removal efficiency of pollutants in wastewater.

[0024] The ozone bubbles are cut through the first through-holes on the vertical orifice plate and the second through-holes on the horizontal orifice plate, thereby limiting the size of the ozone bubbles and increasing the specific surface area of ​​contact between the ozone and the pollutants in the wastewater, thereby facilitating the full reaction between the ozone and the impurities in the wastewater, increasing the oxidation reaction rate, and thus improving the ozone utilization rate;

[0025] By setting up multiple vertical and horizontal orifice plates in the reaction tower, the small bubbles obtained after cutting will be cut into small bubbles again even if they are re-aggregated into large bubbles during the wastewater flow process, ensuring that ozone fully reacts with impurities in the wastewater and improving the ozone utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic structural diagram of a gas contact reactor disclosed in Example 1 of the present invention;

[0028] Figure 2 This is a schematic diagram of the flow of wastewater in a gas contact reactor disclosed in Example 1 of the present invention;

[0029] Figure 3 This is a schematic diagram of wastewater flow direction when the first through hole and the second through hole are selected at different angles in a gas contact reactor disclosed in Example 1 of the present invention;

[0030] Figure 4 This is a schematic structural diagram of a horizontal partition plate and a horizontal orifice plate in a gas contact reactor disclosed in Example 1 of the present invention;

[0031] Figure 5 is a cross-sectional view of a vertical perforated plate in a gas contact reactor disclosed in Example 1 of the present invention;

[0032] Figure 6 for Figure 5 A local enlarged view of point A;

[0033] Figure 7 This is a schematic structural diagram of a gas contact reactor disclosed in Example 2 of the present invention;

[0034] Figure 8 This is a schematic structural diagram of a gas contact reactor disclosed in Example 3 of the present invention;

[0035] Figure 9This is a schematic structural diagram of an oblique block of a gas contact reactor disclosed in Example 3 of the present invention.

[0036] In the picture:

[0037] 1. Water distribution pipe; 2. Aeration plate; 3. Vertical orifice plate; 31. First through hole; 4. Horizontal partition; 5. Horizontal orifice plate; 51. Second through hole; 6. Water outlet pipe; 7. Isolation valve; 8. Gas storage tank; 9. Fan; 10. Ozone concentration monitor; 11. Discharge valve; 12. Safety valve; 13. Reaction tower; 14. Inclined block; 141. Step; 15. Protrusion. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] Example 1

[0040] This embodiment provides a gas contact reactor, such as Figure 1 As shown, it includes: a reaction tower 13, along the height direction of the reaction tower 13, a plurality of cross-arranged horizontal partitions 4 are fixed on the inner side wall of the reaction tower 13, each of the horizontal partitions 4 and the reaction tower 13 forms a serpentine flow channel, and a horizontal orifice plate 5 is fixed between each of the horizontal partitions 4 and the inner side wall of the reaction tower 13, each of the horizontal orifice plates 5 divides the flow channel into a plurality of interconnected subspaces, each of the subspaces is provided with a vertical orifice plate 3, and in this embodiment, the vertical orifice plate 3 is fixed on the horizontal partition 4;

[0041] like Figure 5 and Figure 6 As shown, the vertical orifice plate 3 is provided with a first through hole 31, as shown in FIG. Figure 2 As shown, the wastewater passing through the first through holes 31 flows obliquely downward, and the first through holes 31 on the adjacent vertical orifice plates 3 are horizontally symmetrically distributed;

[0042] like Figure 4 As shown, the horizontal orifice plate 5 is provided with a second through hole 51, as shown in FIG. Figure 2 As shown, the wastewater passing through the second through holes 51 flows obliquely upward, and the second through holes 51 on the cross-arranged horizontal orifice plates 5 are horizontally symmetrically distributed;

[0043] The gas contact reactor provided in this embodiment forms a serpentine flow path through the cross-arranged horizontal partitions 4 and the reaction tower 13, which causes ozone and wastewater to flow in a zigzag manner. This prolongs the path required for the ozone and wastewater to react, increases the contact time between ozone and wastewater in the reactor, facilitates the full reaction between ozone and impurities in the wastewater, and thus improves ozone utilization.

[0044] The first through-holes 31 on the vertical orifice plate 3 and the second through-holes 51 on the horizontal orifice plate 5 cause the wastewater to form turbulent flow, thereby increasing the flow resistance of ozone and wastewater. The multiple vertical orifice plates 3 and the horizontal orifice plates 5 alternately block the flow, thereby increasing the residence time of ozone in the reaction tower 13, further improving the ozone utilization rate, and effectively improving the removal efficiency of pollutants in the wastewater.

[0045] The ozone bubbles are cut by the first through-holes 31 on the vertical orifice plate 3 and the second through-holes 51 on the horizontal orifice plate 5, thereby limiting the size of the ozone bubbles and increasing the specific surface area of ​​contact between the ozone and the pollutants in the wastewater, thereby facilitating the full reaction between the ozone and the impurities in the wastewater, increasing the oxidation reaction rate, and thus improving the ozone utilization rate;

[0046] By arranging multiple vertical orifice plates 3 and horizontal orifice plates 5 in the reaction tower 13, the small bubbles obtained after cutting will be cut into small bubbles again even if they are re-aggregated into large bubbles during the flow of wastewater, ensuring that ozone fully reacts with impurities in the wastewater and improving the utilization rate of ozone.

[0047] In a specific embodiment, Figure 6 As shown, the first through hole 31 and the second through hole 51 are both provided with serrated protrusions 15, which cut large ozone bubbles in the wastewater into small bubbles, increase the specific surface area of ​​contact between ozone and pollutants in the wastewater, and improve the oxidation reaction rate and the decontamination factor.

[0048] In a specific embodiment, the diameter of the first through hole 31 is 1 mm to 10 mm, and the diameter of the second through hole 51 is 1 mm to 10 mm. The small aperture increases the flow resistance and prolongs the residence time of ozone in the reaction tower 13.

[0049] In a specific embodiment, the angle formed between the axis of the first through hole 31 and the radial direction of the reaction tower 13 is 15° to 75°, and the angle formed between the axis of the second through hole 51 and the radial direction of the reaction tower 13 is 15° to 75°;

[0050] Figure 3 The two arrows on the left indicate the flow direction of wastewater when the angle formed between the axis of the first through hole 31 and the radial direction of the reaction tower 13 is 15°, and the angle formed between the axis of the second through hole 51 and the radial direction of the reaction tower 13 is 75°. In this case, the flow resistance is small, the flow rate of wastewater that can pass through per unit time is larger, and the decontamination efficiency is higher.

[0051] Figure 3 The two arrows on the right indicate the flow direction of the wastewater when the angle formed by the axis of the first through hole 31 and the radial direction of the reaction tower 13 is 75° and the angle formed by the axis of the second through hole 51 and the radial direction of the reaction tower 13 is 15°. At this time, the flow resistance is large, the flow rate of wastewater that can pass through per unit time is smaller, the ozone stays in the wastewater longer, and the decontamination effect is better.

[0052] In a specific embodiment, Figure 2 As shown, the angle formed by the axis of the first through hole 31 and the radial direction of the reaction tower 13 and the angle formed by the axis of the second through hole 51 and the radial direction of the reaction tower 13 are preferably 45°, which can take into account both the decontamination effect and the decontamination efficiency.

[0053] In a specific embodiment, Figure 1 As shown, it includes a water distribution pipe 1 and a water outlet pipe 6;

[0054] The water distribution pipe 1 is connected to the aeration plate 2 in the subspace at the bottom of the reaction tower 13, and the water outlet pipe 6 is connected to the subspace at the top of the reaction tower 13, and the treated wastewater is discharged through the water outlet pipe 6;

[0055] In actual use, ozone can be pressurized and dissolved in wastewater through an ejector, and then sent into the reaction tower 13 through the water distribution pipe 1;

[0056] Wastewater can also be sent into the reaction tower 13 through the water distribution pipe 1. In this case, the aeration plate 2 is no longer connected to the water distribution pipe 1, but is connected to a separate ozone gas supply line to send ozone into the reaction tower 13.

[0057] In a specific embodiment, the top of the reaction tower 13 is provided with an exhaust outlet, such as Figure 1 As shown, the exhaust gas outlet is provided with an isolation valve 7, and the exhaust gas after the reaction can be directly discharged into the atmosphere through the isolation valve 7. When the water distribution pipe 1 does not introduce ozone and wastewater into the reaction tower 13, the isolation valve 7 can be closed;

[0058] In practical applications, chlorine can also be used to decontaminate wastewater. The tail gas after the reaction needs to be led out of the isolation valve 7 into the lime (calcium hydroxide) pool to allow the chlorine to react with the lime to generate calcium chloride to avoid pollution.

[0059] Example 2

[0060] This embodiment provides a gas contact reactor. The working principle and main structure of this embodiment are similar to those of Example 1. The difference between this embodiment and Example 1 is as follows:

[0061] In Example 1, the tail gas is directly discharged without considering the recovery and utilization of the tail gas. However, in this example, considering the utilization rate and cost of ozone, the tail gas is recycled and utilized.

[0062] In this embodiment, if Figure 7 As shown, one end of the isolation valve 7 is connected to the tail gas discharge port, and the other end of the isolation valve 7 is connected to the inlet of the gas storage tank 8. A fan 9 is provided between the outlet of the gas storage tank 8 and the water distribution pipe 1. The gas storage tank 8 is provided with a pressure sensor. When the pressure sensor detects that the gas pressure in the gas storage tank 8 reaches the process requirement, the fan 9 is automatically turned on to send the tail gas back into the reaction tower 13 through the water distribution pipe 1 to utilize the unreacted residual ozone in the tail gas;

[0063] When the gas storage tank 8 needs to be repaired, the isolation valve 7 is closed, and the water distribution pipe 1 no longer flows ozone and wastewater into the reaction tower 13.

[0064] In this embodiment, if Figure 7 As shown, the gas tank 8 is connected to the ozone concentration monitor 10, and the gas tank 8 is provided with a discharge pipe, and the discharge pipe is provided with a discharge valve 11. The ozone concentration monitor 10 can switch the discharge valve 11 according to the ozone concentration in the monitored gas tank 8. When the ozone concentration in the tail gas is detected to be lower than the set value, the discharge valve 11 is opened to discharge the gas in the gas tank 8. After a certain period of time (the specific time depends on the volume of the gas tank 8), the discharge valve 11 is automatically closed, and the gas tank 8 collects the tail gas again;

[0065] In practical applications, chlorine can also be used to decontaminate wastewater. When chlorine is used to decontaminate wastewater, the tail gas after the reaction needs to be led out of the discharge valve 11 into a pipeline and introduced into a lime (calcium hydroxide) pool to allow the chlorine to react with the lime to generate calcium chloride to avoid pollution.

[0066] In this embodiment, if Figure 7 As shown, the gas tank 8 is provided with a safety valve 12. When the pressure in the gas tank 8 exceeds the preset safety valve opening pressure, the safety valve 12 automatically opens to discharge the gas in the gas tank 8, thereby preventing the gas tank 8 from being damaged due to excessive pressure in the gas tank 8.

[0067] Example 3

[0068] This embodiment provides a gas contact reactor. The working principle and main structure of this embodiment are similar to those of Example 1. The difference between this embodiment and Example 1 is as follows:

[0069] In this embodiment, if Figure 8 As shown, it also includes a ramp 14, such as Figure 9 As shown, a step 141 is provided on the inclined surface of the inclined block 14;

[0070] The inclined block 14 is disposed opposite to the vertical orifice plate 3 , and the height of the inclined block 14 gradually increases from one end close to the vertical orifice plate 3 to the other end, and the wastewater passing through the first through hole 31 flows toward the step 141 ;

[0071] The inclined block 14 is disposed opposite to the horizontal orifice plate 5 , and the height of the inclined block 14 gradually increases from one end close to the horizontal orifice plate 5 to the other end, and the wastewater passing through the second through hole 51 flows toward the step 141 ;

[0072] In this embodiment, the inclined block 14 is fixed to the inner side wall of the reaction tower 13 and the horizontal partition 4;

[0073] When wastewater flows through the step 141 , ozone bubbles can be further cut, thereby preventing small bubbles from re-aggregating into large bubbles, increasing the specific surface area of ​​contact between ozone and pollutants in the wastewater, and improving the oxidation reaction rate.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas contact reactor comprising: A reaction tower (13), characterized in that, along the height direction of the reaction tower (13), a plurality of cross-arranged horizontal partitions (4) are fixed on the inner side wall of the reaction tower (13), each of the horizontal partitions (4) and the reaction tower (13) encloses a serpentine flow channel, a horizontal orifice plate (5) is fixed between each of the horizontal partitions (4) and the inner side wall of the reaction tower (13), each of the horizontal orifice plates (5) divides the flow channel into a plurality of interconnected subspaces, and each of the subspaces is provided with a vertical orifice plate (3); The vertical orifice plate (3) is provided with a first through hole (31), and wastewater passing through the first through hole (31) flows obliquely downward, and the first through holes (31) on adjacent vertical orifice plates (3) are horizontally symmetrically distributed; The horizontal orifice plate (5) is provided with second through holes (51), and wastewater passing through the second through holes (51) flows obliquely upward, and the second through holes (51) on the cross-arranged horizontal orifice plate (5) are horizontally symmetrically distributed; It also includes an inclined block (14), wherein a step (141) is provided on the inclined surface of the inclined block (14); The inclined block (14) is arranged opposite to the vertical orifice plate (3), and the height of the inclined block (14) gradually increases from one end close to the vertical orifice plate (3) to the other end, and the wastewater passing through the first through hole (31) flows toward the step (141); The inclined block (14) is arranged opposite to the horizontal orifice plate (5), and the height of the inclined block (14) gradually increases from one end close to the horizontal orifice plate (5) to the other end, and the wastewater passing through the second through hole (51) flows toward the step (141).

2. A gas contact reactor according to claim 1, characterized in that: A sawtooth-shaped protrusion (15) is provided in each of the first through hole (31) and the second through hole (51).

3. A gas contact reactor according to claim 1, characterized in that: The diameter of the first through hole (31) is 1 mm to 10 mm, and the diameter of the second through hole (51) is 1 mm to 10 mm.

4. A gas contact reactor according to claim 1, characterized in that: The angle formed between the axis of the first through hole (31) and the radial direction of the reaction tower (13) is 15° to 75°, and the angle formed between the axis of the second through hole (51) and the radial direction of the reaction tower (13) is 15° to 75°.

5. A gas contact reactor according to claim 1, characterized in that: It includes a water distribution pipe (1) and a water outlet pipe (6); The water distribution pipe (1) is connected to the aeration plate (2) located in the subspace at the bottom of the reaction tower (13), and the water outlet pipe (6) is connected to the subspace at the top of the reaction tower (13).

6. A gas contact reactor according to claim 5, characterized in that: A tail gas discharge port is provided at the top of the reaction tower (13), and an isolation valve (7) is provided on the tail gas discharge port.

7. A gas contact reactor according to claim 6, characterized in that: One end of the isolation valve (7) is connected to the tail gas discharge port, and the other end of the isolation valve (7) is connected to the inlet of the gas storage tank (8). A fan (9) is provided between the outlet of the gas storage tank (8) and the water distribution pipe (1).

8. A gas contact reactor according to claim 7, characterized in that: The gas storage tank (8) is connected to an ozone concentration monitor (10). The gas storage tank (8) is provided with a discharge pipe. The discharge pipe is provided with a discharge valve (11). The ozone concentration monitor (10) can switch the discharge valve (11) according to the monitored ozone concentration in the gas storage tank (8).

9. A gas contact reactor according to claim 7, characterized in that: The gas storage tank (8) is provided with a safety valve (12).

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