Catalytic oxidation precipitation reaction system

Abstract

The utility model provides a catalytic oxidation precipitation reaction system which comprises a catalytic regeneration tower and an oxidation precipitation tower. The catalytic regeneration tower comprises a catalyst feeding valve, a fan, an air inlet valve, a regeneration tower exhaust valve, a spraying device, a drainage valve, a water inlet valve, a water inlet pump, a circulating spraying pump, a circulating spraying valve and a water outlet valve; and the oxidation precipitation tower comprises a precipitation tower exhaust valve, a sieve plate, a slag discharge valve, a circulating pump, a circulating water valve and a wastewater valve. ORP, pH and liquid level instruments and flowmeters are arranged in the tower. The catalytic regeneration tower and the oxidation precipitation tower are arranged, and pipeline valves of solid, liquid and gas phases of the system are reasonably switched, so that catalytic oxidation and regeneration cyclic utilization of a catalyst in the system are effectively realized, the consumption and energy consumption of an oxidant (such as ozone) are reduced, and the oxidation precipitation reaction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of catalytic oxidation equipment, and in particular, to a catalytic oxidation precipitation reaction system. Background Technology

[0002] Oxidation is a common chemical treatment method, including ozone, Fenton oxidation, electrocatalytic oxidation, and sodium hypochlorite oxidation. Ozone is widely used due to its strong oxidizing power and lack of secondary pollution. However, existing ozone oxidation systems often directly utilize ozone, resulting in high energy consumption. Improving ozone oxidation efficiency and reducing energy consumption is a major challenge in the development of ozone oxidation equipment and systems. During research on optimizing ozone oxidation equipment, the applicant discovered that catalysts can effectively improve ozone oxidation efficiency. Domestic and international studies have also confirmed the promoting effect of catalysts on ozone oxidation; however, how to achieve catalyst regeneration and reuse within the oxidation system to truly reduce the energy cost of ozone oxidation remains a pressing issue for the industry. Utility Model Content

[0003] The purpose of this invention is to provide a catalytic oxidation precipitation reaction system that enables the catalyst to be recycled and regenerated within the system, thereby solving the problems of high energy consumption and low oxidation efficiency in existing systems.

[0004] To solve the above problems, this utility model proposes a catalytic oxidation precipitation reaction system, including a catalytic regeneration tower (1) and an oxidation precipitation tower (2); wherein the catalytic regeneration tower (1) includes a catalyst feed valve (3), a blower (4), an air inlet valve (5), a regeneration tower exhaust valve (6), a spray device (7), a drain valve (8), a water inlet valve (9), a water inlet pump (10), a circulating spray pump (11), a circulating spray valve (12), and a water outlet valve (13); the oxidation precipitation tower (2) includes a precipitation tower exhaust valve (14), a sieve plate (15), a slag discharge valve (16), a circulating pump (17), a circulating water valve (18), and a wastewater valve (19).

[0005] Furthermore, the outlet pipe of the upper flange of the catalytic regeneration tower (1) is connected to the top flange of the catalytic regeneration tower (1) via the blower (4) and the inlet valve (5), and the top flange of the catalytic regeneration tower (1) is connected to the exhaust valve (6) of the regeneration tower.

[0006] Furthermore, the outlet pipe of the lower flange of the catalytic regeneration tower (1) is connected to the lower flange of the oxidation precipitation tower (2) via the inlet valve (9) and the inlet pump (10), and the outlet pipe of the lower flange of the catalytic regeneration tower (1) is connected to the drain valve (8).

[0007] Furthermore, the outlet pipeline of the bottom flange of the catalytic regeneration tower (1) is connected to the upper flange and spray device (7) of the catalytic regeneration tower (1) via the circulating spray pump (11) and the circulating spray valve (12).

[0008] Furthermore, the outlet pipe of the bottom flange of the catalytic regeneration tower (1) is connected to the lower flange of the oxidation precipitation tower (2) via the circulating spray pump (11) and the water outlet valve (13).

[0009] Furthermore, the outlet pipe of the upper flange of the oxidation precipitation tower (2) is connected to the bottom flange via the circulating water valve (18) and the circulating pump (17).

[0010] Furthermore, the bottom inlet pipe of the oxidation precipitation tower (2) is connected to the bottom flange via the wastewater valve (19) and the circulating pump (17).

[0011] Furthermore, the bottom flange of the oxidation precipitation tower (2) is connected to the slag discharge valve (16), and the top flange is connected to the precipitation tower exhaust valve (14).

[0012] Furthermore, the oxidation precipitation tower (2) is equipped with a sieve plate on the lower side inside, with a sieve plate aperture of 50-200μm.

[0013] Furthermore, both the catalytic regeneration tower (1) and the oxidation precipitation tower (2) are equipped with ORP, pH and level gauges, and the outlets of the catalyst feed valve (3), blower (4), water pump (10) and circulating spray pump (11) are equipped with flow meters.

[0014] This invention offers the following advantages: By incorporating a catalytic regeneration tower and an oxidation precipitation tower, and rationally switching the pipeline valves for the solid, liquid, and gas phases of the system, it effectively achieves catalytic oxidation and regeneration recycling of the catalyst within the system, reducing the consumption of oxidants (such as ozone) and energy consumption, and improving the efficiency of the oxidation precipitation reaction. The catalytic regeneration tower relies on the oxidation effect of the oxidant to regenerate the catalyst, which consumes less energy than when the oxidant reacts directly with wastewater, and also less energy than when the oxidant, catalyst, and wastewater react simultaneously. After solid-liquid separation, the regenerated catalyst is transferred to the oxidation precipitation tower for oxidation precipitation. After the reaction, solid-liquid separation is performed again. The sludge at the bottom of the oxidation precipitation tower is discharged as solid waste, while the exhausted catalyst, along with the supernatant, is returned to the catalytic regeneration tower for regeneration. This maximizes catalyst regeneration and recycling, reducing the cost of catalytic oxidation.

[0015] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention;

[0018] In the diagram: 1-Catalytic regeneration tower, 2-Oxidation precipitation tower, 3-Catalyst feed valve, 4-Fan, 5-Inlet valve, 6-Regeneration tower exhaust valve, 7-Spray device, 8-Drain valve, 9-Inlet water valve, 10-Inlet water pump, 11-Circulating spray pump, 12-Circulating spray valve, 13-Outlet water valve, 14-Precipitation tower exhaust valve, 15-Sieve plate, 16-Slag discharge valve, 17-Circulating pump, 18-Circulating water valve, 19-Wastewater valve. Detailed Implementation

[0019] The embodiments and examples of this utility model are described in detail below with reference to the accompanying drawings. However, this utility model can be implemented in many different ways as defined and covered by the claims.

[0020] like Figure 1 As shown, a catalytic oxidation precipitation reaction system includes: a catalytic regeneration tower (1) and an oxidation precipitation tower (2).

[0021] The catalytic regeneration tower (1) includes a catalyst feed valve (3), a blower (4), an air inlet valve (5), a regeneration tower exhaust valve (6), a spray device (7), a drain valve (8), a water inlet valve (9), a water inlet pump (10), a circulating spray pump (11), a circulating spray valve (12), and a water outlet valve (13). The oxidation precipitation tower (2) includes a precipitation tower exhaust valve (14), a sieve plate (15), a slag discharge valve (16), a circulating pump (17), a circulating water valve (18), and a wastewater valve (19).

[0022] The outlet pipe of the upper flange of the catalytic regeneration tower (1) is connected to the top flange of the catalytic regeneration tower (1) via a blower (4) and an inlet valve (5). The top flange of the catalytic regeneration tower (1) is connected to the exhaust valve (6) of the regeneration tower. The outlet pipe of the lower flange of the catalytic regeneration tower (1) is connected to the lower flange of the oxidation precipitation tower (2) via a water inlet valve (9) and a water inlet pump (10). The outlet pipe of the lower flange of the catalytic regeneration tower (1) is connected to the drain valve (8). The outlet pipe of the bottom flange of the catalytic regeneration tower (1) is connected to the upper flange and the spray device (7) of the catalytic regeneration tower (1) via a circulating spray pump (11) and a circulating spray valve (12). The outlet pipe of the bottom flange of the catalytic regeneration tower (1) is connected to the middle and lower flange of the oxidation precipitation tower (2) via a circulating spray pump (11) and an outlet valve (13). The outlet pipe of the upper flange of the catalytic regeneration tower (2) is connected to the bottom flange via a circulating water valve (18) and a circulating pump (17). The bottom inlet pipe of the catalytic regeneration tower (2) is connected to the bottom flange via the wastewater valve (19) and the circulating pump (17). The bottom flange of the catalytic regeneration tower (2) is connected to the slag discharge valve (16), and the top flange is connected to the vent valve (14) of the precipitation tower. A sieve plate with a pore size of 50-200μm is provided on the lower side inside the catalytic regeneration tower (2). Both the catalytic regeneration tower (1) and the oxidation precipitation tower (2) are equipped with ORP, pH, and level gauges. The outlets of the catalyst feed valve (3), the blower (4), the water inlet pump (10), and the circulating spray pump (11) are all equipped with flow meters.

[0023] The process is as follows:

[0024] Step 1, Catalyst Preparation:

[0025] Open the catalyst feed valve (3) to transport the catalyst raw material into the catalytic regeneration tower (1), and close the catalyst feed valve (3) after the liquid level is reached.

[0026] Turn on the circulating spray pump (11) and the circulating spray valve (12) so that the catalyst raw material enters the top spray device (7) from the bottom of the catalytic regeneration tower (1) to carry out the spray circulation operation.

[0027] Close the exhaust valve (6) of the regeneration tower. Turn on the blower (4) and the inlet valve (5). The oxidant (such as ozone) circulates inside the catalytic regeneration tower (1) and continuously reacts with the catalyst feedstock sprayed in circulation.

[0028] Once the reaction reaches the set ORP, the above equipment and valves are shut off, and the catalyst preparation is complete.

[0029] Step 2, Catalyst Transfer

[0030] The slag-water mixture in the catalytic regeneration tower (1) undergoes natural sedimentation and solid-liquid separation to obtain sediment and sludge.

[0031] After settling is complete, open the drain valve (8) to discharge the settled liquid from the catalytic regeneration tower (1), and close the drain valve (8) after completion.

[0032] Open the exhaust valve (6) of the regeneration tower to discharge the remaining gas in the tower.

[0033] Turn on the circulating spray pump (11) and the outlet valve (13) to allow the sludge at the bottom of the catalytic regeneration tower (1) to enter the oxidation precipitation tower (2). After completion, turn off the circulating spray pump (11) and the outlet valve (13).

[0034] Step 3, Oxidation Precipitation Reaction

[0035] Open the wastewater valve (19) and the circulation pump (17) to transport the wastewater into the oxidation precipitation tower (2).

[0036] Once the wastewater reaches the required level, close the wastewater valve (19).

[0037] Open the circulating water valve (18) and the vent valve (14) of the sedimentation tower to realize the circulating contact reaction between wastewater and catalyst in the oxidation sedimentation tower (2).

[0038] Once the reaction reaches the set ORP, the aforementioned equipment and valves are closed, and the oxidation precipitation reaction is complete.

[0039] Step 4: Transfer of depleted catalyst and sludge

[0040] The slag-water mixture in the oxidation precipitation tower (2) undergoes natural sedimentation and solid-liquid separation to obtain sediment and sludge.

[0041] Open the inlet valve (9) and the inlet pump (10), and the spent catalyst and the settled clear liquid enter the catalytic regeneration tower (1).

[0042] Open the slag discharge valve (16) and the slag after oxidation precipitation is discharged from the oxidation precipitation tower (2). After completion, close the slag discharge valve (16).

[0043] Step 5: Catalyst Regeneration

[0044] After the inactivated catalyst and the settled clear liquid reach the liquid level, close the inlet valve (9) and the inlet pump (10).

[0045] Open the catalyst feed valve (3) and add a trace amount of catalyst raw material in a certain proportion (a trace amount of catalyst may be carried away in the sludge after oxidation and precipitation).

[0046] Follow up with the steps 1-4 above, and repeat the process.

[0047] Through the above implementation method, the effluent after oxidation and precipitation treatment is finally discharged from the drain valve (8), and the oxidized precipitate is finally discharged from the slag discharge valve (16), thus achieving the effect of oxidizing and precipitating the wastewater. The catalyst is recycled within the system, and the catalyst is regenerated using the oxidant, reducing the amount of oxidant used; the oxidation and precipitation reaction is achieved using the catalyst, improving the reaction efficiency.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A catalytic oxidation precipitation reaction system, characterized in that: The system includes a catalytic regeneration tower (1) and an oxidation precipitation tower (2); the catalytic regeneration tower (1) includes a catalyst feed valve (3), a blower (4), an air inlet valve (5), a regeneration tower exhaust valve (6), a spray device (7), a drain valve (8), a water inlet valve (9), a water inlet pump (10), a circulating spray pump (11), a circulating spray valve (12), and a water outlet valve (13); the oxidation precipitation tower (2) includes a precipitation tower exhaust valve (14), a sieve plate (15), a slag discharge valve (16), a circulating pump (17), a circulating water valve (18), and a wastewater valve (19).

2. The catalytic oxidation precipitation reaction system according to claim 1, characterized in that, The outlet pipe of the upper flange of the catalytic regeneration tower (1) is connected to the top flange of the catalytic regeneration tower (1) via a fan (4) and an air inlet valve (5), and the top flange of the catalytic regeneration tower (1) is connected to the exhaust valve (6) of the regeneration tower.

3. The catalytic oxidation precipitation reaction system according to claim 1, characterized in that, The outlet pipe of the lower flange of the catalytic regeneration tower (1) is connected to the lower flange of the oxidation precipitation tower (2) via the inlet valve (9) and the inlet pump (10), and the outlet pipe of the lower flange of the catalytic regeneration tower (1) is connected to the drain valve (8).

4. The catalytic oxidation precipitation reaction system according to claim 1, characterized in that, The bottom flange outlet pipeline of the catalytic regeneration tower (1) is connected to the upper flange and spray device (7) of the catalytic regeneration tower (1) via a circulating spray pump (11) and a circulating spray valve (12).

5. The catalytic oxidation precipitation reaction system according to claim 1, characterized in that, The bottom flange outlet pipe of the catalytic regeneration tower (1) is connected to the lower flange of the oxidation precipitation tower (2) via a circulating spray pump (11) and a water outlet valve (13).

6. The catalytic oxidation precipitation reaction system according to claim 1, characterized in that, The upper flange outlet pipe of the oxidation precipitation tower (2) is connected to the bottom flange via a circulating water valve (18) and a circulating pump (17).

7. The catalytic oxidation precipitation reaction system according to claim 1, characterized in that, The bottom inlet pipe of the oxidation precipitation tower (2) is connected to the bottom flange via the wastewater valve (19) and the circulating pump (17).

8. The catalytic oxidation precipitation reaction system according to claim 1, characterized in that, The bottom flange of the oxidation precipitation tower (2) is connected to the slag discharge valve (16), and the top flange is connected to the precipitation tower exhaust valve (14).

9. The catalytic oxidation precipitation reaction system according to claim 1, characterized in that, The oxidation precipitation tower (2) is equipped with a sieve plate on the lower side inside, with a sieve plate aperture of 50-200μm.

10. The catalytic oxidation precipitation reaction system according to claim 1, characterized in that, The catalytic regeneration tower (1) and the oxidation precipitation tower (2) are equipped with ORP, pH and level gauges, and the outlets of the catalyst feed valve (3), blower (4), water pump (10) and circulating spray pump (11) are all equipped with flow meters.

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