Synthetic ammonia acid removal wastewater treatment system

Abstract

The utility model discloses a synthetic ammonia acid removal wastewater treatment system which comprises a wastewater stabilizing tank, a wastewater delivery pump and a wastewater bioreactor, the wastewater stabilizing tank is provided with a wastewater outlet, an ammonia supplementing opening, an unabsorbed gas discharging opening and a wastewater inlet from bottom to top; the wastewater outlet is connected with an inlet of the wastewater conveying pump; a water distributor, a biological reaction area and a three-phase separator are arranged inside the wastewater bioreactor from bottom to top, and a liquid inlet, an air inlet, a liquid phase outlet and a tail gas outlet are formed outside the wastewater bioreactor from bottom to top; one end of the liquid inlet is connected with an outlet of the wastewater delivery pump, the other end of the liquid inlet is connected with the water distributor, the air inlet is connected with the gas distributor arranged in the biological reaction area, the liquid phase outlet is connected with a liquid phase overflow port of the three-phase separator, and the tail gas outlet and the unabsorbed gas discharge outlet are both connected with a torch main pipeline. The ammonia nitrogen content of the synthetic ammonia acid removal wastewater can be efficiently reduced at low cost, and the problems of overload and prolonged treatment period of the existing sewage treatment plant are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and more specifically relates to a synthetic amino acid decomposition wastewater treatment system. Background Art

[0002] The ammonia synthesis process includes: CO conversion, acid gas removal, liquid nitrogen washing, ammonia synthesis gas compression, ammonia synthesis, and synthetic ammonia refrigeration. Among them, the drainage and ammonia washing water generated by CO conversion and acid gas removal (hereinafter referred to as acid removal) are the main sources of wastewater. The main components of the wastewater include ammonia nitrogen, sulfide, and cyanide. The normal discharge of acid removal wastewater is about 11m 3 / h, and it will increase to a certain extent in case of start-up or shutdown or production fluctuations.

[0003] The conventional treatment method is to combine this wastewater with other wastewater on the factory floor and send it to a sewage treatment plant for treatment. However, due to the steady increase in the load of the factory's existing production equipment and the commissioning of new products, the existing sewage treatment plant's treatment capacity is approaching saturation. Therefore, pre-treating the wastewater from each unit before discharging it to the sewage treatment plant can effectively alleviate the current situation. Utility Model Content

[0004] To address the practical problems of existing production, this utility model proposes a synthetic amino acid desulfurization wastewater treatment system that can cost-effectively and efficiently reduce the ammonia nitrogen content of acid desulfurization wastewater. Simultaneously, it utilizes the ammonia-containing tail gas within the plant to adjust the total nitrogen concentration of the acid desulfurization wastewater, thereby both regulating the total nitrogen concentration and treating the ammonia-containing tail gas. This system minimizes ammonia nitrogen, COD, cyanide, and other indicators in the acid desulfurization process wastewater, addressing the overload and extended treatment cycle issues of existing sewage treatment plants.

[0005] The purpose of this utility model is achieved through the following technical solutions.

[0006] The utility model discloses a synthetic ammonia decomposition wastewater treatment system, comprising a wastewater stabilization tank, a wastewater delivery pump, and a wastewater bioreactor; the wastewater stabilization tank is provided with a wastewater outlet, an ammonia replenishment port, an unabsorbed gas discharge port, and a wastewater inlet in sequence from bottom to top, and the wastewater outlet is connected to the wastewater delivery pump inlet through a pipeline; the wastewater bioreactor is provided with a water distributor, a biological reaction zone, and a three-phase separator in sequence from bottom to top, and the wastewater bioreactor is provided with a liquid inlet, an air inlet, a liquid phase outlet, and a tail gas outlet in sequence from bottom to top; one end of the liquid inlet is connected to the wastewater delivery pump outlet through a pipeline, and the other end is connected to the water distributor through a pipeline; the air inlet is connected to a gas distributor arranged in the biological reaction zone through a pipeline; the liquid phase outlet is connected to a liquid phase overflow port of the three-phase separator through a pipeline; the tail gas outlet and the unabsorbed gas discharge port are both connected to a flare main line.

[0007] Furthermore, the wastewater outlet of the wastewater stabilization tank is arranged at the bottom of the wastewater stabilization tank, the ammonia replenishment port and the unabsorbed gas discharge port of the wastewater stabilization tank are arranged on the side of the wastewater stabilization tank, and the wastewater inlet of the wastewater stabilization tank is arranged at the top of the wastewater stabilization tank.

[0008] Furthermore, the wastewater inlet of the wastewater stabilization tank is connected to the interior of the wastewater stabilization tank in a pipeline manner and is located above the designed maximum liquid level.

[0009] Furthermore, the ammonia replenishment port of the wastewater stabilization tank is connected to the wastewater stabilization tank in a pipeline manner and extends below the liquid level in the wastewater stabilization tank, and the pipeline opens downward.

[0010] Furthermore, the liquid inlet of the wastewater bioreactor is arranged at the bottom of the wastewater bioreactor, the air inlet and liquid phase outlet of the wastewater bioreactor are arranged on the side of the wastewater bioreactor, and the tail gas outlet of the wastewater bioreactor is arranged at the top of the wastewater bioreactor.

[0011] Furthermore, the water distributor in the wastewater bioreactor is in the form of a honeycomb nozzle, and the honeycomb nozzle is integral or distributed.

[0012] Furthermore, the gas distributor is arranged at a position higher than the water distributor and is located at an axially lower position of the biological reaction zone.

[0013] Furthermore, the biological reaction zone in the wastewater bioreactor is filled with activated sludge.

[0014] Compared with the prior art, the beneficial effects brought about by the technical solution of the utility model are:

[0015] The utility model ensures that the wastewater parameters of the synthetic amino acid desorption process are stable and the water intake is controllable through the wastewater stabilization tank. An ammonia supply pipeline is set to introduce ammonia-containing tail gas from other devices to make up for the ammonia nitrogen deficiency caused by production fluctuations. At the same time, it can also treat ammonia-containing tail gas from other devices. Ensure that the subsequent wastewater bioreactors connected in series can function stably and efficiently. The wastewater bioreactor adopts the activated sludge method to treat ammonia nitrogen wastewater. This method has low water treatment cost, low investment, and stable operation. In addition, compared with chemical methods, the activated sludge method does not introduce new chemical agents, which reduces safety risks. The water distributor set in the wastewater bioreactor and the gas distributor at the end of the air inlet provide sufficient driving force inside the wastewater bioreactor, eliminating mechanical stirring and saving electricity costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the utility model of the synthetic amino acid decomposition wastewater treatment system.

[0017] Figure 2 It is a schematic diagram of the interior of the wastewater bioreactor in the utility model.

[0018] Figure markings: 1-wastewater stabilization tank, 2-wastewater outlet, 3-ammonia supplement port, 4-unabsorbed gas discharge port, 5-wastewater inlet, 6-wastewater transfer pump, 7-liquid inlet, 8-wastewater bioreactor, 9-air inlet, 10-water phase outlet, 11-tail gas outlet, 12-water distributor, 13-gas distributor, 14-biological reaction zone, 15-three-phase separator. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] like Figure 1 As shown, the synthetic amino acid decomposition wastewater treatment system of the present invention mainly includes a wastewater stabilization tank 1, a wastewater delivery pump 6, a wastewater bioreactor 8, etc. The liquid delivery between the wastewater stabilization tank 1 and the wastewater bioreactor 8 is achieved by the wastewater delivery pump 6. The wastewater stabilization tank 1 is provided with a wastewater outlet 2, an ammonia replenishment port 3, an unabsorbed gas discharge port 4, and a wastewater inlet 5 from bottom to top. The wastewater outlet 2 is connected to the inlet of the wastewater delivery pump 6 through a pipeline. Figure 2 As shown, the wastewater bioreactor 8 is provided with a water distributor 12, a biological reaction zone 14, and a three-phase separator 15 from bottom to top. The wastewater bioreactor 8 is provided with a liquid inlet 7, an air inlet 9, a liquid phase outlet 10, and an exhaust gas outlet 11 from bottom to top. One end of the liquid inlet 7 is connected to the outlet of the wastewater delivery pump 6 through a pipeline, and the other end of the liquid inlet 7 is connected to the water distributor 12 through a pipeline. The air inlet 9 is connected to the interior of the wastewater bioreactor 8 through a pipeline, and the end of the pipeline is connected to the gas distributor 13 provided in the biological reaction zone 14. The liquid phase outlet 10 is connected to the liquid phase overflow port of the three-phase separator 15 through a pipeline. The exhaust gas outlet 11 of the wastewater bioreactor 8 is connected to the unabsorbed gas discharge port 4 of the wastewater stabilization tank 1 through a pipeline and then merges into the flare main line.

[0021] In the above-mentioned wastewater treatment system, preferably, the wastewater outlet 2 of the wastewater stabilization tank 1 is arranged at the bottom of the wastewater stabilization tank 1, the ammonia replenishment port 3 and the unabsorbed gas discharge port 4 of the wastewater stabilization tank 1 are arranged on the side of the wastewater stabilization tank 1, and the wastewater inlet 5 of the wastewater stabilization tank 1 is arranged at the top of the wastewater stabilization tank 1.

[0022] In the above-mentioned wastewater treatment system, preferably, the wastewater inlet 5 of the wastewater stabilization tank 1 is connected to the wastewater stabilization tank 1 by a pipeline and is located above the designed maximum liquid level, maintaining a certain distance from the designed maximum liquid level. The ammonia replenishment port 3 of the wastewater stabilization tank 1 is connected to the wastewater stabilization tank 1 by a pipeline and is connected to the wastewater stabilization tank 1 below the liquid level, and the pipeline opens downward.

[0023] In the above-mentioned wastewater treatment system, preferably, the liquid inlet 7 of the wastewater bioreactor 8 is arranged at the bottom of the wastewater bioreactor 8, the air inlet 9 and the liquid phase outlet 10 of the wastewater bioreactor 8 are arranged on the side of the wastewater bioreactor 8, and the exhaust gas outlet 11 of the wastewater bioreactor 8 is arranged at the top of the wastewater bioreactor 8.

[0024] In the above wastewater treatment system, preferably, the water distributor 12 in the wastewater bioreactor 8 is in the form of a honeycomb nozzle, which can be integral or distributed, and its hydraulic distribution area should meet the requirements of forming a fully mixed flow in the biological reaction zone 14.

[0025] In the above wastewater treatment system, preferably, the biological reaction zone 14 in the wastewater bioreactor 8 is filled with activated sludge. The gas distributor 13 is arranged at a position higher than the water distributor 12 and is located axially lower than the biological reaction zone 14.

[0026] During use, the activated sludge transported by the tank truck is first injected into the wastewater bioreactor 8 using the external hose of the wastewater delivery pump 6. After completion, the original pipeline connection is restored. Then, the air inlet 9 is opened to fill the bioreactor 8 with air, so that the activated sludge circulates in the biological reaction zone 14. Furthermore, the wastewater from the synthetic amino acid decomposition process is introduced through the wastewater inlet 5. The ammonia-containing tail gas from other devices is introduced through the ammonia supply port 3. Under the agitation of the ammonia-containing tail gas, the wastewater in the wastewater stabilization tank 1 is evenly mixed and absorbs the ammonia in the gas. Furthermore, the wastewater enters the wastewater bioreactor 8 through the wastewater outlet 2 and is pressurized by the wastewater delivery pump 6. After entering the bioreactor 8, the wastewater contacts and mixes with the activated sludge in the biological reaction zone 14. As the microorganisms act, the ammonia nitrogen, COD, and sulfide are utilized by the microorganisms and converted into nitrates, methane, sulfate, etc. The gas generated during the wastewater degradation process carries the solid particles and liquid in the biological reaction zone 14 into the three-phase separator 15. Under the action of three-phase separator 15, solid particles settle back into bioreactor zone 14, while the liquid phase overflows to both sides and flows out through aqueous phase outlet 10 to the industrial park sewage pipeline. After being separated by three-phase separator 15, the tail gas flows through tail gas outlet 11 to the main flare pipeline for incineration.

[0027] The present invention stabilizes the amount of wastewater through the wastewater stabilization tank 1, supplements the ammonia nitrogen content of the wastewater, and adjusts the carbon-nitrogen ratio of the wastewater, thereby ensuring the stability of the water quality of the wastewater bioreactor 8 inlet and ensuring the stability of the microbial degradation process of the wastewater. Furthermore, the wastewater completes biodegradation under the action of the activated sludge in the wastewater bioreactor 8, and the air inlet 9 can maintain the stability of the oxygen content in the reaction system. The dual effects of the supplementary air and the air flow and water flow brought by the water distributor 12 when the water enters the biological reaction zone 14 will achieve good mixing and mass transfer effects. The present invention uses the activated sludge method to treat acid-depleted wastewater, which is low-cost, green and environmentally friendly, and has mature technology, alleviating the high-load operation of the sewage treatment plant.

[0028] Although the functions and working processes of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific functions and working processes. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A synthetic amino acid wastewater treatment system, characterized in that: The invention comprises a wastewater stabilization tank (1), a wastewater delivery pump (6), and a wastewater bioreactor (8); the wastewater stabilization tank (1) is provided with a wastewater outlet (2), an ammonia supply port (3), an unabsorbed gas discharge port (4), and a wastewater inlet (5) in sequence from bottom to top, and the wastewater outlet (2) is connected to the inlet of the wastewater delivery pump (6) through a pipeline; the interior of the wastewater bioreactor (8) is provided with a water distributor (12), a biological reaction zone (14), and a three-phase separator (15) in sequence from bottom to top, and the exterior of the wastewater bioreactor (8) is provided with a liquid inlet (16) in sequence from bottom to top. Inlet (7), air inlet (9), liquid phase outlet (10), tail gas outlet (11); one end of the liquid inlet (7) is connected to the outlet of the wastewater delivery pump (6) through a pipeline, and the other end is connected to the water distributor (12) through a pipeline, the air inlet (9) is connected to the gas distributor (13) arranged in the biological reaction zone (14) through a pipeline, the liquid phase outlet (10) is connected to the liquid phase overflow port of the three-phase separator (15) through a pipeline, and the tail gas outlet (11) and the unabsorbed gas discharge port (4) are both connected to the flare main line.

2. The synthetic amino acid wastewater treatment system according to claim 1, characterized in that: The wastewater outlet (2) of the wastewater stabilization tank (1) is arranged at the bottom of the wastewater stabilization tank (1), the ammonia replenishment port (3) and the unabsorbed gas discharge port (4) of the wastewater stabilization tank (1) are arranged at the side of the wastewater stabilization tank (1), and the wastewater inlet (5) of the wastewater stabilization tank (1) is arranged at the top of the wastewater stabilization tank (1).

3. The synthetic amino acid wastewater treatment system according to claim 1, characterized in that: The wastewater inlet (5) of the wastewater stabilization tank (1) is connected to the wastewater stabilization tank (1) in a pipeline manner and is located above the designed maximum liquid level.

4. The synthetic amino acid wastewater treatment system according to claim 1, characterized in that: The ammonia replenishing port (3) of the wastewater stabilization tank (1) is connected to the wastewater stabilization tank (1) in a pipeline manner and extends below the liquid level in the wastewater stabilization tank (1), and the pipeline opens downward.

5. The synthetic amino acid wastewater treatment system according to claim 1, characterized in that: The liquid inlet (7) of the wastewater bioreactor (8) is arranged at the bottom of the wastewater bioreactor (8), the air inlet (9) and the liquid phase outlet (10) of the wastewater bioreactor (8) are arranged at the side of the wastewater bioreactor (8), and the tail gas outlet (11) of the wastewater bioreactor (8) is arranged at the top of the wastewater bioreactor (8).

6. The synthetic amino acid wastewater treatment system according to claim 1, characterized in that: The water distributor (12) in the wastewater bioreactor (8) is in the form of a honeycomb nozzle, and the honeycomb nozzle is an integral type or a plurality of distributed types.

7. The synthetic amino acid wastewater treatment system according to claim 1, characterized in that: The gas distributor (13) is arranged at a position higher than the water distributor (12) and is located at an axially lower position of the biological reaction zone (14).

8. The synthetic amino acid wastewater treatment system according to claim 1, characterized in that: The biological reaction zone (14) in the wastewater bioreactor (8) is filled with activated sludge.

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