Skid-mounted magnetic suspension MVR wastewater treatment system

Abstract

The utility model belongs to the technical field of industrial wastewater treatment, and discloses a skid-mounted magnetic suspension MVR (mechanical vapor recompression) wastewater treatment system which comprises a base, a preheater for concentrating sewage, a falling film evaporator, a separator, a condensing tank, a material pump, a water feeding pump, a centrifugal machine for further treating concentrate, a drying machine, a boiler and a magnetic suspension steam compressor for heating and boosting secondary steam are arranged on the base; the device is simple in overall structure, capable of reducing operation cost and size and beneficial to standardization, latent heat and biomass energy are further utilized, and the using effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial wastewater treatment. Specifically, it relates to a skid-mounted maglev MVR wastewater treatment system. Background Art

[0002] Mechanical vapor recompression evaporation technology (MVR), as a mature energy-saving technology, has been widely used in foreign countries in fields such as chemical industry, food, paper making, medicine, seawater desalination, and sewage treatment. This technology reduces the demand for external energy by reusing the energy of the secondary steam generated by the evaporator, and has the characteristics of low energy consumption, high efficiency, and good quality of produced water.

[0003] However, traditional MVR wastewater treatment systems also have disadvantages such as large construction floor area, long construction period, high upfront investment cost, and difficulty in transfer after completion. At the same time, the concentrated substances after wastewater treatment cannot be further utilized, wasting latent heat and biomass energy.

[0004] A Chinese patent with the application number 2022106575261 discloses a maglev MVR evaporator, including: a feed pump, a condensate preheater, a steam condenser, a steam generator, a heater, a condensate tank, a first condensate pump, a second condensate pump, a gas-liquid separator tank, a maglev compressor, a forced circulation pump, a separator, a discharge pump, and an electric control box; the steam generator is respectively connected to the maglev compressor and the heater; the heater is connected to the separator through the forced circulation pump, the feed pump is connected to the condensate preheater, and the condensate preheater is respectively connected to the first condensate pump and the heater; the heater is also connected to the condensate tank; the top of the condensate tank is connected to one end of the steam condenser through a gas pipeline, the steam condenser is connected to the upper end of the gas-liquid separator tank, and the bottom of the gas-liquid separator tank is connected to the condensate tank through the second condensate pump; the maglev compressor is respectively connected to the heater and the separator; the electric control box is used to control various components that require electrical control;

[0005] In this application, the secondary steam is recycled, which can achieve the purpose of energy conservation and consumption reduction. However, the concentrated slag generated during the concentration process is not reused, still wasting part of the latent heat and biomass energy. Content of the Utility Model

[0006] The main technical problem to be solved by the utility model is to provide a skid-mounted maglev MVR wastewater treatment system with a simple overall structure, which can reduce the operation cost, reduce the volume, facilitate standardization, further utilize the latent heat and biomass energy, and improve the use effect.

[0007] To solve the above technical problems, the utility model provides the following technical solutions:

[0008] A skid-mounted magnetic levitation MVR wastewater treatment system, including a base, on which there are a preheater for concentrating sewage, a falling film evaporator, a separator, a condensate tank, a material pump, a feed water pump, a centrifuge for further treating the concentrate, a dryer, a boiler, and a magnetic levitation steam compressor for heating and boosting the secondary steam;

[0009] The material output end of the separator is connected to the material input end of the centrifuge, the material output end of the centrifuge is connected to the material input end of the dryer, the material output end of the dryer is connected to the material input end of the boiler, and the material output end of the boiler is provided with an ash slag outlet;

[0010] The steam output end of the boiler is connected to the steam input end of the dryer, the steam output end of the dryer is connected to the steam input end of the magnetic levitation steam compressor, the steam output end of the separator is connected to the steam input end of the magnetic levitation steam compressor, and the steam output end of the magnetic levitation steam compressor is connected to the heat source input end of the falling film evaporator.

[0011] The following is the further optimization of the above technical solution by the present utility model:

[0012] The material input end of the preheater is provided with a sewage inlet, the material output end of the preheater is connected to the material input end of the falling film evaporator, and the material output end of the falling film evaporator is connected to the material input end of the separator.

[0013] Further optimization: The dehydration output end of the centrifuge is connected to the material input end of the falling film evaporator.

[0014] Further optimization: The heat source output end of the falling film evaporator is connected to the input end of the condensate tank, and the output end of the condensate tank is connected to the heat source input end of the preheater.

[0015] Further optimization: The gas output end of the condensate tank is provided with a non-condensable gas outlet.

[0016] Further optimization: The cooling water output end of the preheater is provided with a cooling water outlet.

[0017] Further optimization: The cooling water output end of the preheater is connected to the feed water end of the boiler.

[0018] Further optimization: A material pump is connected in series between the material output end of the preheater and the material input end of the falling film evaporator, and a feed water pump is connected in series between the cooling water output end of the preheater and the feed water end of the boiler.

[0019] The present utility model conducts a skid-mounted integrated transformation on the MVR evaporator in the wastewater treatment system, reducing the overall volume, thereby reducing the floor area of the MVR evaporator, facilitating later standardization, and eliminating on-site installation during use, making it convenient to transfer, greatly saving construction time and construction costs.

[0020] Meanwhile, in the wastewater treatment system of the present utility model, a magnetic levitation steam compressor is used to heat up and boost the pressure of the secondary steam, further reducing the energy consumption of the MVR evaporator and the operating cost.

[0021] Finally, the obtained concentrate is further dehydrated, dried and pulverized, and then sent to a boiler for combustion to generate heat energy, which can reduce pollutant emissions and make full use of the biomass energy in the concentrate, improving the energy utilization rate.

[0022] The following further describes the present utility model in conjunction with the drawings and embodiments. Description of the Drawings

[0023] Figure 1 It is the process schematic diagram of the overall structure in the embodiment of the present utility model.

[0024] In the figure: 1 - base; 2 - preheater; 21 - sewage inlet; 22 - cooling water outlet; 3 - falling film evaporator; 4 - separator; 5 - centrifuge; 6 - dryer; 7 - boiler; 71 - ash slag outlet; 8 - magnetic levitation steam compressor; 9 - condensation tank; 91 - non-condensable gas outlet; 10 - material pump; 11 - feed water pump. Detailed Embodiments

[0025] As Figure 1 shown: A skid-mounted magnetic levitation MVR wastewater treatment system includes a base 1, and a preheater 2, a falling film evaporator 3, a separator 4, a condensation tank 9, a material pump 10, a feed water pump 11, a centrifuge 5 for further treating the concentrate, a dryer 6, a boiler 7, and a magnetic levitation steam compressor 8 for heating up and boosting the pressure of the secondary steam are arranged on the base 1.

[0026] A sewage inlet 21 is arranged at the material input end of the preheater 2.

[0027] The material output end of the preheater 2 is communicated with the material input end of the falling film evaporator 3 through a pipeline.

[0028] The material output end of the falling film evaporator 3 is communicated with the material input end of the separator 4 through a pipeline.

[0029] The material output end of the separator 4 is communicated with the material input end of the centrifuge 5 through a screw conveyor.

[0030] The material output end of the centrifuge 5 is communicated with the material input end of the dryer 6 through a screw conveyor.

[0031] The dehydration output end of the centrifuge 5 is communicated with the material input end of the falling film evaporator 3 through a pipeline.

[0032] The material output end of the dryer 6 is connected to the material input end of the boiler 7 through a screw conveyor.

[0033] The material output end of the boiler 7 is provided with a slag outlet 71.

[0034] In the prior art, the working principle of the screw conveyor for conveying and crushing is well-known and widely used, and will not be elaborated here.

[0035] The steam output end of the boiler 7 is connected to the steam input end of the dryer 6 through a pipeline.

[0036] The steam output end of the dryer 6 is connected to the steam input end of the magnetic levitation steam compressor 8 through a pipeline.

[0037] The steam output end of the separator 4 is connected to the steam input end of the magnetic levitation steam compressor 8 through a pipeline.

[0038] The steam output end of the magnetic levitation steam compressor 8 is connected to the heat source input end of the falling film evaporator 3 through a pipeline.

[0039] The heat source output end of the falling film evaporator 3 is connected to the input end of the condensate tank 9 through a pipeline.

[0040] The output end of the condensate tank 9 is connected to the heat source input end of the preheater 2 through a pipeline.

[0041] The gas output end of the condensate tank 9 is provided with a non-condensable gas outlet 91.

[0042] The cooling water output end of the preheater 2 is provided with a cooling water outlet 22.

[0043] The cooling water output end of the preheater 2 is connected to the water supply end of the boiler 7 through a pipeline.

[0044] A material pump 10 is connected in series on the pipeline between the material output end of the preheater 2 and the material input end of the falling film evaporator 3.

[0045] A feed water pump 11 is connected in series on the pipeline between the cooling water output end of the preheater 2 and the water supply end of the boiler 7.

[0046] When the skid-mounted magnetic levitation MVR wastewater treatment system operates, sewage enters the preheater 2 from the sewage inlet 21. After the preheater 2 preheats the incoming sewage, under the conveying action of the material pump 10, the preheated sewage enters the falling film evaporator 3 and is heated to a saturated liquid, and the temperature of the saturated liquid is close to the evaporation temperature.

[0047] The saturated liquid enters the separator 4 for flash evaporation. At this time, the saturated liquid is concentrated and secondary steam and concentrate are generated. The concentrate is transported into the centrifuge 5 for dehydration treatment, and then high-temperature sewage is obtained.

[0048] At this time, the high-temperature sewage is output from the dehydration output end of the centrifuge 5 and converges with the preheated sewage output from the preheater 2. Then, under the conveying action of the material pump 10, it is sent to the falling film evaporator 3 for heating, and then undergoes flash evaporation and concentration in the separator 4. The concentrate is then sent into the centrifuge 5 for dehydration treatment.

[0049] With such a design, the concentrate in the sewage can be fully precipitated. The concentrate is transported to the dryer 6 for further drying and pulverization to obtain a combustible concentrate residue.

[0050] The concentrate residue is transported into the boiler 7 for combustion to release heat.

[0051] The liquefied condensed water and the unliquefied steam output from the heat source output end of the falling film evaporator 3 enter the condensate tank 9 for condensation. After the condensation is completed, the non-condensable gas that is completely liquefied is discharged through the non-condensable gas outlet 91, while the condensed water with residual heat at a high temperature enters the preheater 2 to preheat the sewage using the residual heat at a high temperature, and then a cycle is formed.

[0052] After the condensed water preheats the sewage in the preheater 2, it is discharged from the cooling water output end of the preheater 2. Part of the cooling water is discharged through the cooling water outlet 22, and an additional part of the cooling water is transported into the boiler 7 under the action of the feed water pump 11 to be heated and evaporated into high-temperature and high-pressure steam. The generated high-temperature and high-pressure steam is output from the steam output of the boiler 7 to the dryer 6 to dry the concentrate.

[0053] The high-temperature and high-pressure steam discharges the exhausted steam from the dryer 6 after acting in the dryer 6. Together with the secondary steam output from the separator 4, it enters the magnetic levitation steam compressor 8 to be heated and pressurized to obtain high-temperature and high-pressure gas. The high-temperature and high-pressure gas is then transported to the falling film evaporator 3 to be liquefied and release heat to act as a heat source to heat the sewage.

[0054] The condensed water after the high-temperature and high-pressure gas is liquefied and the steam that has not been completely liquefied then enters the condensate tank 9 for condensation, and then a cycle is formed.

[0055] The working principle of the magnetic levitation steam compressor 8 is mainly based on magnetic levitation technology and thermodynamics principles. Its core lies in using magnetic levitation bearing technology to achieve non-contact and non-wearing suspension operation of the compressor rotor, and combining the steam compression process to complete energy conversion and transmission. The specific working principle is already well-known and will not be elaborated here.

[0056] Using the magnetic levitation steam compressor 8 in this system to heat and pressurize the secondary steam can reduce energy consumption and operating costs.

[0057] The system further performs drying and pulverizing treatments on the concentrate obtained by sewage concentration and then burns it to release heat energy, fully utilizes its biomass energy, and improves the energy utilization rate.

[0058] For those of ordinary skill in the art, according to the teachings of the present utility model, without departing from the principles and spirit of the present utility model, the changes, modifications, substitutions, and deformations made to the embodiments still fall within the protection scope of the present utility model.

Claims

1. A skid-mounted magnetic levitation MVR wastewater treatment system, including a base (1), characterized in that: A preheater (2), a falling film evaporator (3), a separator (4), a condensate tank (9), a material pump (10), a feed water pump (11), a centrifuge (5) for further treating the concentrate, a dryer (6), a boiler (7), and a magnetic levitation steam compressor (8) for boosting the temperature and pressure of the secondary steam are provided on a base (1); The material output end of the separator (4) is communicated with the material input end of the centrifuge (5), the material output end of the centrifuge (5) is communicated with the material input end of the dryer (6), the material output end of the dryer (6) is communicated with the material input end of the boiler (7), and an ash outlet (71) is provided at the material output end of the boiler (7); The steam output end of the boiler (7) is communicated with the steam input end of the dryer (6), the steam output end of the dryer (6) is communicated with the steam input end of the magnetic levitation steam compressor (8), the steam output end of the separator (4) is communicated with the steam input end of the magnetic levitation steam compressor (8), and the steam output end of the magnetic levitation steam compressor (8) is communicated with the heat source input end of the falling film evaporator (3).

2. The skid-mounted maglev MVR wastewater treatment system according to claim 1, characterized in that: A sewage inlet (21) is provided at the material input end of the preheater (2), the material output end of the preheater (2) is communicated with the material input end of the falling film evaporator (3), and the material output end of the falling film evaporator (3) is communicated with the material input end of the separator (4).

3. The skid-mounted maglev MVR wastewater treatment system according to claim 2, wherein: The dehydration output end of the centrifuge (5) is communicated with the material input end of the falling film evaporator (3).

4. The skid-mounted maglev MVR wastewater treatment system according to claim 3, wherein: The heat source output end of the falling film evaporator (3) is communicated with the input end of the condensate tank (9), and the output end of the condensate tank (9) is communicated with the heat source input end of the preheater (2).

5. The skid-mounted maglev MVR wastewater treatment system according to claim 4, wherein: A non-condensable gas outlet (91) is provided at the gas output end of the condensate tank (9).

6. The skid-mounted maglev MVR wastewater treatment system according to claim 5, characterized in that: A cooling water outlet (22) is provided at the cooling water output end of the preheater (2).

7. A skid-mounted maglev MVR wastewater treatment system according to claim 6, characterized in that: The cooling water output end of the preheater (2) is communicated with the feed water end of the boiler (7).

8. A skid-mounted maglev MVR wastewater treatment system according to claim 7, characterized in that: A material pump (10) is connected in series between the material output end of the preheater (2) and the material input end of the falling film evaporator (3), and a feed water pump (11) is connected in series between the cooling water output end of the preheater (2) and the feed water end of the boiler (7).

Images