Novel efficient low-carbon intelligent high-concentration ammonia-nitrogen wastewater treatment system

Abstract

The utility model discloses a novel high-efficiency low-carbon intelligent high-concentration ammonia-nitrogen wastewater treatment system which comprises an acid circulation system, an alkali adding system, an acid supplementing system and a cleaning system. When the system is used for treating high-concentration ammonia-nitrogen wastewater, ammonia nitrogen in effluent stably and efficiently reaches the standard; steam consumption and air blowing are not needed, the power consumption of per ton of water is only 1 kW.h, the consumption of sulfuric acid per ton of water is reduced by 15.2%, the concentration of ammonium sulfate is increased to 28-30%, the yield of ammonium sulfate is reduced by 14.2-31.4%, and low carbon is achieved; and an automatic system and a remote big data monitoring analysis platform are accessed, so that the intelligent level and the use efficiency of the system are improved, and the service life of the system is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental engineering wastewater treatment, and specifically relates to a novel high-efficiency, low-carbon, intelligent high-concentration ammonia nitrogen wastewater treatment system. Background Art

[0002] Ammonia nitrogen in wastewater contains free ammonia and ammonium ions, which can cause eutrophication of water bodies and black and smelly water bodies. It also has certain biological toxicity. In recent years, due to the increasingly stringent discharge standards for ammonia nitrogen in wastewater and the inclusion of ammonia nitrogen emissions in wastewater as one of the total control indicators, the treatment of ammonia nitrogen wastewater, especially high-concentration ammonia nitrogen wastewater (ammonia nitrogen concentration ≥ 2000 mg / L), has received widespread attention.

[0003] At present, traditional high-concentration ammonia nitrogen wastewater treatment processes include: biological treatment, stripping, steam stripping (ammonia distillation), magnesium ammonium phosphate precipitation, breakpoint chlorination, ion exchange, electrochemical oxidation, etc., but have the following problems: limitations when the ammonia nitrogen concentration is high, high energy consumption (large consumption of steam, electricity, etc.), high investment, expensive operation, large area, high equipment height, secondary pollution, high ammonia nitrogen in the effluent or unguaranteed, and the application scenarios are limited.

[0004] Contradictory to the problems existing in traditional high-ammonia nitrogen wastewater treatment is the universality of high-ammonia nitrogen wastewater in all walks of life, such as semiconductors, new energy, medicine, smelting, chemical industry, pesticides, etc., it is urgent to develop a high-concentration ammonia nitrogen wastewater treatment process that can overcome the above problems to solve the contradiction between industrial development and wastewater treatment. The membrane deamination method has attracted more and more attention in recent years and has been applied to high-ammonia nitrogen wastewater treatment due to its high deamination efficiency, no secondary pollution, small footprint, and low equipment height. However, it is still subject to the essential characteristics of currently commonly used membrane materials (such as PP, PVDF, etc.), resulting in easy wire breakage, easy wetting, easy pollution, difficult cleaning, short life, etc. It cannot be applied when the wastewater contains high COD, high salt, organic solvents, etc. Polytetrafluoroethylene (PTFE) has the characteristics of strong hydrophobicity, corrosion resistance, melting resistance, acid and alkali resistance, high strength, and pollution resistance. It can better overcome the shortcomings of the above-mentioned other materials membrane deamination process. PTFE membrane deamination has gradually become an important choice for high-ammonia nitrogen wastewater treatment. However, there are still problems: the by-product output is large and the concentration is low; the degree of intelligence is low; when the ammonia nitrogen concentration is high, the sulfuric acid circulating liquid concentration exceeds the temperature and needs to be cooled down and shut down. It is necessary to develop a by-product quality improvement and quantity reduction, intelligent, continuous, efficient, low-carbon, intelligent high-concentration ammonia nitrogen wastewater treatment system.

[0005] The traditional high-concentration ammonia nitrogen wastewater treatment has the following problems: limitations when the ammonia nitrogen concentration is high, high energy consumption (large consumption of steam, electricity, etc.), high investment, expensive operation, large space, high equipment height, secondary pollution, high ammonia nitrogen in the effluent or unguaranteed, etc. The membrane deamination process has the problems of single material, easy wire breakage, easy wetting, easy pollution, difficult cleaning, short life, etc. Utility Model Content

[0006] The utility model proposes a high-concentration ammonia nitrogen wastewater treatment system, which treats high-concentration ammonia nitrogen wastewater (≥2000mg / L) with low effluent ammonia nitrogen (minimum ≤8mg / L), and solves the technical problems of low byproduct ammonium sulfate concentration in the existing high-concentration ammonia nitrogen wastewater treatment system, ammonium sulfate temperature exceeding the deamination membrane tolerance temperature causing damage, low data processing efficiency, high energy and material consumption, and high operating cost.

[0007] The utility model provides a new type of high-efficiency, low-carbon, intelligent high-concentration ammonia nitrogen wastewater treatment system, which specifically includes an acid circulation system, an alkali addition system, an acid supplementation system, and a cleaning system;

[0008] The acid circulation system comprises a primary PTFE deamination membrane acid circulation system, a secondary PTFE deamination membrane acid circulation system and a tertiary PTFE deamination membrane acid circulation system. The primary PTFE deamination membrane acid circulation system is specifically that the acid circulation liquid outlet of the sulfuric acid circulation tank 1# is connected to the acid circulation liquid inlet of the variable frequency sulfuric acid circulation pump 1#, the acid circulation liquid outlet of the variable frequency sulfuric acid circulation pump 1# is connected to the acid circulation liquid inlet of the sulfuric acid circulation liquid filter 1#, the acid circulation liquid outlet of the sulfuric acid circulation liquid filter 1# is connected to the acid circulation liquid inlet of the sulfuric acid circulation heat exchanger, the acid circulation liquid outlet of the sulfuric acid circulation heat exchanger is connected to the acid circulation liquid inlet of the primary PTFE deamination membrane, the acid circulation liquid outlet of the primary PTFE deamination membrane is connected to the sulfuric acid circulation pump 1#, the acid circulation liquid outlet of the sulfuric acid circulation pump ... primary PTFE deamination membrane is connected to the sulfuric acid circulation pump 1#, the acid circulation liquid outlet of the sulfuric acid circulation pump 1# is connected to the acid circulation liquid inlet of the sulfuric acid circulation heat exchanger, the acid circulation liquid outlet of the primary PTFE deamination membrane is connected to the sulfuric acid circulation pump 1#, the acid circulation liquid outlet of the sulfuric acid circulation pump 1# is connected to the acid circulation liquid inlet of the sulfuric acid circulation heat exchanger, the acid circulation liquid outlet of the primary PTFE deamination membrane is connected to the sulfuric acid circulation The acid circulating liquid reflux port of the ring tank 1# is connected to the acid circulating liquid reflux port of the sulfuric acid circulating tank 2#; the secondary PTFE deamination membrane acid circulation system and the tertiary PTFE deamination membrane acid circulation system are specifically that the acid circulating liquid outlet of the sulfuric acid circulating tank 2# is connected to the acid circulating liquid inlet of the variable frequency sulfuric acid circulating pump 2#, the acid circulating liquid outlet of the variable frequency sulfuric acid circulating pump 2# is connected to the acid circulating liquid inlet of the sulfuric acid circulating liquid filter 2# or is connected to the ammonium sulfate solution reuse port, the acid circulating liquid outlet of the sulfuric acid circulating liquid filter 2# is connected to the acid circulating liquid inlet of the secondary PTFE deamination membrane and the tertiary PTFE deamination membrane, and the acid circulating liquid outlets of the secondary PTFE deamination membrane and the tertiary PTFE deamination membrane are connected to the acid circulating liquid reflux port of the sulfuric acid circulating tank 2#;

[0009] The alkali adding system is specifically that the outlet of the alkali liquid tank is connected to the inlet of the variable frequency alkali liquid metering pump, and the outlet of the variable frequency alkali liquid metering pump is connected to the alkali inlet of the alkali adding pipeline mixer;

[0010] The acid replenishment system is specifically connected to the outlet of the acid liquid tank and the inlet of the variable frequency acid adding metering pump, and the outlet of the variable frequency acid adding metering pump is connected to the acid inlet of the acid adding pipeline mixer 1#1 and the acid adding pipeline mixer 2#;

[0011] The cleaning system is specifically configured such that the outlet of the cleaning box is connected to the inlet of the variable frequency cleaning pump, the outlet of the variable frequency cleaning pump is connected to the inlet of the cleaning filter, the outlet of the cleaning filter is connected to the cleaning liquid inlets of the primary PTFE deamination membrane, the secondary PTFE deamination membrane, and the tertiary PTFE deamination membrane, and the cleaning liquid outlets of the primary PTFE deamination membrane, the secondary PTFE deamination membrane, and the tertiary PTFE deamination membrane are connected to the reflux port of the cleaning box.

[0012] Preferably, the boxes / tanks used in the acid circulation system, alkali addition system, acid replenishment system and cleaning system are provided with liquid level transmitters.

[0013] Preferably, the inlets and outlets of the filters used in the acid circulation system, alkali addition system, acid replenishment system and cleaning system are provided with pressure gauges.

[0014] Preferably, the pumps used in the acid circulation system, alkali addition system, acid replenishment system and cleaning system are variable frequency pumps.

[0015] Preferably, it also includes a PLC controller and a remote big data monitoring and analysis platform. The monitoring and control data of the system adopts the PLC controller, and the monitoring and control data are connected to the remote big data monitoring and analysis platform for analysis.

[0016] Preferably, the system for treating high-concentration ammonia nitrogen wastewater comprises the following steps:

[0017] S1, high-concentration ammonia nitrogen wastewater that meets the temperature requirement of 35-45℃ first enters the raw water tank, is pumped into the raw water filter through the variable frequency water inlet pump, and is sent to the primary PTFE deamination membrane, secondary PTFE deamination membrane, and tertiary PTFE deamination membrane after filtration to remove ammonia nitrogen and then become qualified produced water;

[0018] S2, the raw water tank is provided with a liquid level transmitter, and is interlocked with the variable frequency water inlet pump to protect the variable frequency water inlet pump and prevent the water tank from overflowing. An alkali adding pipeline mixer is provided at the water outlet of the variable frequency water inlet pump to evenly add alkali to adjust the pH value of the wastewater ≥, a pressure gauge is provided at the inlet and outlet of the raw water filter to monitor the filter pressure difference and regularly evaluate the filter pollution status, a remote temperature, pressure, flow, pH, conductivity, ammonia nitrogen, COD and other instruments are provided at the water inlet of the primary PTFE deamination membrane to monitor the water inlet parameters, and a pressure gauge is provided at the water outlet of the tertiary PTFE deamination membrane to monitor the inlet and outlet pressure difference of the PTFE deamination membrane;

[0019] S3, the primary PTFE deamination membrane is provided with an independent acid circulation system, specifically: the sulfuric acid circulating liquid in the sulfuric acid circulation tank 1# is pumped out by the variable frequency sulfuric acid circulation pump 1#, and then sent to the acid inlet of the primary PTFE deamination membrane after cooling with cold water by the sulfuric acid circulation liquid heat exchanger, and then reacts with most of the ammonia in the wastewater, and then returns to the sulfuric acid circulation tank 1# through the acid outlet of the primary PTFE deamination membrane for recycling, or refluxes to the sulfuric acid circulation tank 2# for use by the secondary PTFE deamination membrane and the tertiary PTFE deamination membrane, wherein the sulfuric acid circulation system Tank 1# is provided with a liquid level transmitter, which is interlocked with the variable frequency sulfuric acid circulating pump 1# to protect the variable frequency sulfuric acid circulating pump 1# and prevent the water tank from overflowing. Pressure gauges are provided at the inlet and outlet of the sulfuric acid circulating filter 1# to monitor the filter pressure difference and regularly evaluate the filter contamination status. The outlet of the sulfuric acid circulating filter 1# is provided with remote temperature, pressure, pH and other instruments. The outlet of the acid circulating liquid of the sulfuric acid circulating liquid heat exchanger is provided with a temperature transmitter to monitor the parameters of the acid circulating liquid of the primary PTFE deamination membrane. Pressure gauges are provided at the inlet and outlet of the acid circulating liquid of the primary PTFE deamination membrane.

[0020] S4, the secondary PTFE deamination membrane and the tertiary PTFE deamination membrane share a set of acid circulation system, specifically: the sulfuric acid circulation liquid in the sulfuric acid circulation tank 2# is pumped out by the variable frequency acid circulation pump 2#, and is sent to the acid inlet of the secondary PTFE deamination membrane and the tertiary PTFE deamination membrane after protective filtration by the sulfuric acid circulation filter 2#, and then reacts with ammonia in the wastewater, and then returns to the sulfuric acid circulation tank 2# through the acid outlet of the secondary PTFE deamination membrane and the tertiary PTFE deamination membrane for recycling, wherein the sulfuric acid circulation tank 2# is provided with a liquid level variable The transmitter is interlocked with the variable frequency acid circulation pump 2# to protect the variable frequency acid circulation pump 2# and prevent the water tank from overflowing. A pressure gauge is set at the inlet and outlet of the sulfuric acid circulation filter 2# to monitor the filter pressure difference and regularly evaluate the filter pollution status. The outlet of the sulfuric acid circulation filter 2# is set with remote temperature, pressure, pH and other instruments to monitor the acid circulation liquid parameters of the secondary PTFE deamination membrane and the tertiary PTFE deamination membrane. Pressure gauges are set at the inlet and outlet of the acid circulation liquid of the secondary PTFE deamination membrane and the tertiary PTFE deamination membrane;

[0021] S5, adding alkali to the wastewater, the liquid alkali in the alkali liquid tank is pumped into the alkali adding port of the alkali adding pipeline mixer arranged at the water outlet of the variable frequency water inlet pump through the variable frequency alkali liquid metering pump, wherein the alkali liquid tank is provided with a liquid level transmitter, which is interlocked with the variable frequency alkali liquid metering pump to protect the variable frequency alkali liquid metering pump and prevent alkali liquid from overflowing;

[0022] S6, acid circulation liquid acid replenishment, sulfuric acid in the acid liquid tank is respectively pumped into the acid adding pipeline mixer 1#1 and the acid adding pipeline mixer 2# through the variable frequency acid adding metering pump to replenish sulfuric acid, when the pH of the acid circulation liquid outlet of the sulfuric acid circulation filter 1# is ≥1, the acid is automatically replenished, and when the pH of the acid circulation liquid outlet of the sulfuric acid circulation filter 2# is ≥3, the acid is automatically replenished, wherein the acid liquid tank is provided with a liquid level transmitter, which is interlocked with the variable frequency acid adding metering pump to protect the variable frequency acid adding metering pump and prevent acid overflow;

[0023] S7, PTFE deamination membrane cleaning system, the cleaning liquid in the cleaning box, including but not limited to sodium hydroxide and hydrochloric acid, is pumped out by a variable frequency cleaning pump, protectively filtered by a cleaning filter, and then sent to the cleaning liquid inlet of each level of PTFE deamination membrane, and then refluxed to the front cleaning box through the cleaning liquid reflux port after cleaning; when the pH of the sulfuric acid circulating liquid of the secondary PTFE deamination membrane and the tertiary PTFE deamination membrane is ≥3 and the liquid level of the sulfuric acid circulation tank 2# is high, it is discharged;

[0024] S8, this new high-efficiency, low-carbon, intelligent high-concentration ammonia nitrogen wastewater treatment system uploads all online instrument data to the PLC controller for monitoring, analysis and early warning. At the same time, the PLC controller is equipped with Internet of Things technology and is connected to the remote big data monitoring and analysis platform of the professional system provider.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] (1) The sulfuric acid circulation system is divided into different levels. The primary PTFE deamination membrane bears the vast majority of the total amount (80% to 90%) of ammonia nitrogen removal, consumes more sulfuric acid, and requires a higher concentration of sulfuric acid circulating liquid. The secondary and tertiary PTFE deamination membranes only bear a small part of the total amount (10% to 20%) of ammonia nitrogen removal, consume less sulfuric acid, and require a lower concentration of sulfuric acid circulating liquid. The primary PTFE deamination membrane of this system is equipped with a separate sulfuric acid circulation system, and the concentration of dilute sulfuric acid circulating liquid is 2% to 5%. The secondary and tertiary PTFE deamination membranes share a set of sulfuric acid circulation system, and the pH of the configured dilute sulfuric acid circulating liquid is ≈ 0.5 to 1. When the pH of the primary circulating liquid drops to 1, it returns to the secondary and tertiary levels for recycling, which can not only ensure the deamination effect of the primary level and even the entire system, but also improve the utilization rate of sulfuric acid and the concentration of by-product ammonium sulfate, and can also reduce the production of ammonium sulfate.

[0027] (2) When the ammonia nitrogen concentration in the wastewater is high (≥2000 mg / L), the heat generated by adding concentrated sulfuric acid, the heat generated by heat exchange between wastewater and acid circulating fluid, and the heat generated by the reaction between ammonia and sulfuric acid often make the temperature of the acid circulating fluid easily exceed the tolerance temperature of the PTFE deamination membrane (≤45°C). Most of the time, this problem is ignored or the system is forced to shut down. This system adds a heat exchanger to the primary sulfuric acid circulation system to ensure normal and continuous operation of the system;

[0028] (3) Key remote sensors and frequency converters are installed. The PTFE deamination membrane is extremely sensitive to pressure. Once overpressure occurs, the hydrophobicity of the PTFE deamination membrane is easily destroyed, causing it to lose its deamination ability. This system installs pressure transmitters at the water inlet and acid inlet of the PTFE deamination membrane. The water inlet pump and acid circulation pump are frequency converter pumps. The pumps are interlocked with the pressure transmitters to adjust and strictly control the pressure within the system requirements to automatically protect the system. At the same time, pH meters are installed at the water inlet and acid inlet, and frequency converter acid and alkali metering pumps are installed. The pH meters are interlocked with the acid and alkali pumps to automatically add acid and alkali, thereby improving the accuracy of system operation. Liquid level transmitters are installed in each tank to prevent overflow risks and protect water pumps.

[0029] (4) It is equipped with a cleaning system to achieve automatic step-by-step cleaning. There may be various pollutants in the wastewater, such as organic matter, salt, microorganisms, etc., which will bring the risk of membrane pollution. Regular cleaning can be carried out according to the water quality. Generally, the acid side is relatively clean and does not need to be cleaned. The wastewater side of each level of PTFE deamination membrane in this system is equipped with corresponding automatic valves, which can achieve regular and step-by-step automatic membrane cleaning, thereby extending the service life of the system, especially the PTFE deamination membrane;

[0030] (5) This system uses a PLC controller to monitor, analyze, and operate the entire system. It is connected to online instruments such as temperature, pressure, flow, COD, ammonia nitrogen, pH, and conductivity. At the same time, the Internet of Things technology is used to connect each PTFE membrane deamination system to the remote big data monitoring and analysis platform of the professional system provider. Professional engineers can check the operating parameters and status of the PTFE membrane deamination system in real time and regularly, and adjust the most appropriate and professional operation plan for each PTFE membrane deamination system in real time. At the same time, through big data analysis and early warning, judgment and identification of possible user errors, the professional level of user management is improved, the system's professional requirements for on-site personnel are reduced, and the intelligent operation of the system is truly realized;

[0031] (6) The PTFE membrane deamination material is PTFE, which has the characteristics of strong hydrophobicity, anti-pollution, corrosion resistance, acid and alkali resistance, high strength, long life, and washability. Compared with air stripping, no air blowing is required, and energy saving is more than 80%. Compared with ammonia distillation, no steam is required, achieving low-carbon energy saving of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is the process flow chart of the new type of efficient, low-carbon, intelligent high-concentration ammonia nitrogen wastewater treatment system of the utility model.

[0033] Figure identification: 1-raw water tank; 2-variable frequency water inlet pump; 3-raw water filter; 4-primary PTFE deamination membrane; 5-secondary PTFE deamination membrane; 6-tertiary PTFE deamination membrane; 7-sulfuric acid circulation tank 1#; 8-variable frequency sulfuric acid circulation pump 1#; 9-sulfuric acid circulation filter 1#; 10-sulfuric acid circulation liquid heat exchanger; 11-sulfuric acid circulation tank 2#; 12-variable frequency acid circulation pump 2#; 13-sulfuric acid circulation filter 2#; 14-alkali liquid tank; 15-variable frequency alkali liquid metering pump; 16-alkali addition pipeline mixer; 17-acid liquid tank; 18-variable frequency acid addition metering pump; 19-acid addition pipeline mixer 1#; 20-acid addition pipeline mixer 2#; 21-cleaning tank; 22-variable frequency cleaning pump; 23-cleaning filter; 24-PLC controller; 25-remote big data monitoring and analysis platform. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the process flow chart shown in the accompanying drawings and a specific embodiment of wastewater treatment in a factory. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Please see attached Figure 1 , a new type of high-efficiency, low-carbon, intelligent high-concentration ammonia nitrogen wastewater treatment system, including an acid circulation system, an alkali addition system, an acid supplement system, and a cleaning system;

[0036] The acid circulation system comprises a primary PTFE deamination membrane acid circulation system, a secondary PTFE deamination membrane acid circulation system and a tertiary PTFE deamination membrane acid circulation system. The primary PTFE deamination membrane acid circulation system is specifically that the acid circulation liquid outlet of the sulfuric acid circulation tank 1#7 is connected to the acid circulation liquid inlet of the variable frequency sulfuric acid circulation pump 1#8, the acid circulation liquid outlet of the variable frequency sulfuric acid circulation pump 1#8 is connected to the acid circulation liquid inlet of the sulfuric acid circulation liquid filter 1#9, the acid circulation liquid outlet of the sulfuric acid circulation liquid filter 1#9 is connected to the acid circulation liquid inlet of the sulfuric acid circulation heat exchanger 10, the acid circulation liquid outlet of the sulfuric acid circulation heat exchanger 10 is connected to the acid circulation liquid inlet of the primary PTFE deamination membrane 4, the acid circulation liquid outlet of the primary PTFE deamination membrane 4 is connected to the sulfuric acid circulation tank 1# 7 is connected to the acid circulating liquid reflux port or the sulfuric acid circulating tank 2#11; the secondary PTFE deamination membrane acid circulation system and the tertiary PTFE deamination membrane acid circulation system are specifically that the acid circulating liquid outlet of the sulfuric acid circulating tank 2#11 is connected to the acid circulating liquid inlet of the variable frequency sulfuric acid circulating pump 2#12, the acid circulating liquid outlet of the variable frequency sulfuric acid circulating pump 2#12 is connected to the acid circulating liquid inlet of the sulfuric acid circulating liquid filter 2#13 or is connected to the ammonium sulfate solution reuse port, the acid circulating liquid outlet of the sulfuric acid circulating liquid filter 2#13 is connected to the acid circulating liquid inlet of the secondary PTFE deamination membrane 5 and the tertiary PTFE deamination membrane 6, and the acid circulating liquid outlets of the secondary PTFE deamination membrane 5 and the tertiary PTFE deamination membrane 6 are connected to the acid circulating liquid reflux port of the sulfuric acid circulating tank 2#11;

[0037] The alkali adding system is specifically that the outlet of the alkali liquid tank 14 is connected to the inlet of the variable frequency alkali liquid metering pump 15, and the outlet of the variable frequency alkali liquid metering pump 15 is connected to the alkali inlet of the alkali adding pipeline mixer 16;

[0038] The acid replenishment system is specifically that the outlet of the acid liquid tank 17 is connected to the inlet of the variable frequency acid adding metering pump 18, and the outlet of the variable frequency acid adding metering pump 18 is connected to the acid inlet of the acid adding pipeline mixer 1#19 and the acid adding pipeline mixer 2#20;

[0039] The cleaning system is specifically configured such that the outlet of the cleaning box 21 is connected to the inlet of the variable frequency cleaning pump 22, the outlet of the variable frequency cleaning pump 22 is connected to the inlet of the cleaning filter 23, the outlet of the cleaning filter 23 is connected to the cleaning liquid inlets of the primary PTFE deamination membrane 4, the secondary PTFE deamination membrane 5, and the tertiary PTFE deamination membrane 6, and the cleaning liquid outlets of the primary PTFE deamination membrane 4, the secondary PTFE deamination membrane 5, and the tertiary PTFE deamination membrane 6 are connected to the reflux port of the cleaning box 21.

[0040] Furthermore, the boxes / tanks used in the acid circulation system, alkali addition system, acid replenishment system, and cleaning system are provided with liquid level transmitters.

[0041] Furthermore, the inlet and outlet of the filter used in the acid circulation system, alkali addition system, acid replenishment system and cleaning system are provided with pressure gauges.

[0042] Furthermore, the pumps used in the acid circulation system, alkali addition system, acid replenishment system and cleaning system are variable frequency pumps.

[0043] Furthermore, it also includes a PLC controller 24 and a remote big data monitoring and analysis platform 25. The monitoring and control data of the system adopts the PLC controller 24, and the monitoring and control data are connected to the remote big data monitoring and analysis platform 25 for analysis.

[0044] The influent water quality of a factory is: ammonia nitrogen 2000~4000mg / L, COD 20000~35000mg / L, pH 5~6.5, temperature 40~45℃, and the ammonia nitrogen of the effluent is required to be ≤100mg / L and then sent to the biological treatment stage for further treatment. The treatment scale is 3m 3 / h, adopting the new high-efficiency, low-carbon, intelligent high-concentration ammonia nitrogen wastewater treatment system disclosed by the utility model, there are three-stage PTFE membrane deammoniation, 6 PTFE membranes in each stage, a total of 18 PTFE deammoniation membranes, the first-stage PTFE deammoniation membrane is equipped with an independent sulfuric acid circulation system, and an acid circulation liquid heat exchanger is added to ensure the continuous automatic operation of the system. The second and third-stage deammoniation membranes are equipped with a set of sulfuric acid circulation system, which operates in the above manner and is equipped with a PLC controller and connected to a remote big data monitoring and analysis platform. The effluent ammonia nitrogen can be stabilized at ≤100mg / L, without consuming steam or blowing air. The power consumption per ton of water is only 1kW·h, the alkali consumption per ton of water is 6.8kg, the sulfuric acid consumption per ton of water is 8.9kg, the by-product ammonium sulfate concentration is 28-30%, and the ammonium sulfate output per ton of water is 42-48kg. Compared with traditional processes: the system can achieve continuous and automatic operation; the consumption of sulfuric acid per ton of water is reduced from 10.5kg to 8.9kg, a decrease of 15.2%; the concentration of ammonium sulfate is increased from 20-25% to 28-30%; the output of ammonium sulfate per ton of water is reduced from 56-70kg to 42-48kg, a decrease of 14.2-31.4%; the PTFE deamination membrane has the characteristics of strong hydrophobicity, pollution resistance, corrosion resistance, acid and alkali resistance, high strength, long life, and washability, and is equipped with an automatic cleaning system to extend the service life of the PTFE deamination membrane; with the access to the automation system and the remote big data monitoring and analysis platform, the system has achieved 100% automatic operation and automatic cleaning. With the help of professional support from the system provider, the system failure rate is greatly reduced, and the system intelligence level, use efficiency and life are improved.

[0045] The above examples show that the system of the utility model can treat high-concentration ammonia nitrogen wastewater, and the ammonia nitrogen in the effluent can reach the standard stably and efficiently; no steam consumption and air blowing are required, the power consumption per ton of water is only 1kW·h, the sulfuric acid consumption per ton of water is reduced by 15.2%, the ammonium sulfate concentration is increased to 28-30%, and the ammonium sulfate output is reduced by 14.2-31.4%, thus achieving low carbon; it is equipped with access to the automation system and the remote big data monitoring and analysis platform, which improves the intelligence level, utilization efficiency and life of the system.

[0046] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable those skilled in the art to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A new type of high-efficiency, low-carbon, intelligent high-concentration ammonia nitrogen wastewater treatment system, characterized in that: Including acid circulation system, alkali adding system, acid replenishing system and cleaning system; The acid circulation system comprises a primary PTFE deamination membrane acid circulation system, a secondary PTFE deamination membrane acid circulation system and a tertiary PTFE deamination membrane acid circulation system. Specifically, the acid circulation liquid outlet of the primary PTFE deamination membrane acid circulation system is connected to the acid circulation liquid inlet of the variable frequency sulfuric acid circulation pump 1#(8), the acid circulation liquid outlet of the variable frequency sulfuric acid circulation pump 1#(8) is connected to the acid circulation liquid inlet of the sulfuric acid circulation liquid filter 1#(9), the acid circulation liquid outlet of the sulfuric acid circulation liquid filter 1#(9) is connected to the acid circulation liquid inlet of the sulfuric acid circulation heat exchanger (10), the acid circulation liquid outlet of the sulfuric acid circulation heat exchanger (10) is connected to the acid circulation liquid inlet of the primary PTFE deamination membrane (4), the acid circulation liquid outlet of the primary PTFE deamination membrane (4) is connected to the acid circulation liquid outlet of the sulfuric acid circulation tank 1#(7) The acid circulating liquid reflux port of the secondary PTFE deamination membrane or the tertiary PTFE deamination membrane acid circulating system is specifically that the acid circulating liquid outlet of the sulfuric acid circulating tank 2#(11) is connected to the acid circulating liquid inlet of the variable frequency sulfuric acid circulating pump 2#(12), the acid circulating liquid outlet of the variable frequency sulfuric acid circulating pump 2#(12) is connected to the acid circulating liquid inlet of the sulfuric acid circulating liquid filter 2#(13) or is connected to the ammonium sulfate solution reuse port, the acid circulating liquid outlet of the sulfuric acid circulating liquid filter 2#(13) is connected to the acid circulating liquid inlet of the secondary PTFE deamination membrane (5) and the tertiary PTFE deamination membrane (6), and the acid circulating liquid outlets of the secondary PTFE deamination membrane (5) and the tertiary PTFE deamination membrane (6) are connected to the acid circulating liquid reflux port of the sulfuric acid circulating tank 2#(11); The alkali adding system is specifically that the outlet of the alkali liquid tank (14) is connected to the inlet of the variable frequency alkali liquid metering pump (15), and the outlet of the variable frequency alkali liquid metering pump (15) is connected to the alkali inlet of the alkali adding pipeline mixer (16); The acid replenishment system is specifically configured such that the outlet of the acid liquid tank (17) is connected to the inlet of a variable frequency acid adding metering pump (18), and the outlet of the variable frequency acid adding metering pump (18) is connected to the acid inlets of an acid adding pipeline mixer 1# (19) and an acid adding pipeline mixer 2# (20); The cleaning system is specifically characterized in that the outlet of the cleaning box (21) is connected to the inlet of the variable frequency cleaning pump (22), the outlet of the variable frequency cleaning pump (22) is connected to the inlet of the cleaning filter (23), the outlet of the cleaning filter (23) is connected to the cleaning liquid inlets of the primary PTFE deamination membrane (4), the secondary PTFE deamination membrane (5), and the tertiary PTFE deamination membrane (6), and the cleaning liquid outlets of the primary PTFE deamination membrane (4), the secondary PTFE deamination membrane (5), and the tertiary PTFE deamination membrane (6) are connected to the reflux port of the cleaning box (21).

2. The novel high-efficiency, low-carbon, intelligent high-concentration ammonia nitrogen wastewater treatment system according to claim 1 is characterized in that: The boxes / tanks used in the acid circulation system, alkali addition system, acid replenishment system and cleaning system are provided with liquid level transmitters.

3. The novel high-efficiency, low-carbon, intelligent high-concentration ammonia nitrogen wastewater treatment system according to claim 1 is characterized in that: The inlet and outlet of the filters used in the acid circulation system, alkali adding system, acid replenishing system and cleaning system are provided with pressure gauges.

4. The novel high-efficiency, low-carbon, intelligent high-concentration ammonia nitrogen wastewater treatment system according to claim 1 is characterized in that: The pumps used in the acid circulation system, alkali adding system, acid replenishing system and cleaning system are variable frequency pumps.

5. The novel high-efficiency, low-carbon, intelligent high-concentration ammonia nitrogen wastewater treatment system according to claim 1 is characterized in that: It also includes a PLC controller (24) and a remote big data monitoring and analysis platform (25). The monitoring and control data of the system adopts the PLC controller (24), and the monitoring and control data are connected to the remote big data monitoring and analysis platform (25) for analysis.

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