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High-efficiency energy-saving low-pressure evaporation system for sewage and working method of system

An evaporation system, high-efficiency and energy-saving technology, applied in the direction of heating water/sewage treatment, etc., can solve the problems of low evaporation efficiency, high cost of sewage treatment, high energy consumption, etc., to improve safety, reduce sewage treatment costs, environmental benefits and The effect of improving social benefits

Active Publication Date: 2019-08-23
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing evaporation equipment for industrial wastewater treatment has the problems of low evaporation efficiency, high energy consumption in the actual operation process, and high cost of sewage treatment

Method used

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  • High-efficiency energy-saving low-pressure evaporation system for sewage and working method of system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A high-efficiency and energy-saving sewage low-pressure evaporation system, such as figure 1 As shown, it includes an air waste heat recovery device 1, a low-pressure conical evaporator 2, an air preheater 3 and an air heater 4 connected in sequence;

[0040] The air waste heat recovery device 1 is provided with a first heat transfer pipe rack 5, the low-pressure conical evaporator 2 is provided with a second heat transfer pipe rack 6, and the air preheater 3 is provided with a third heat transfer pipe rack 7;

[0041]The air waste heat recovery device 1 is provided with a sewage inlet 8 and a sewage outlet 9, the sewage outlet 9 is connected to the inlet of the low-pressure conical evaporator 2 through the raw water pipeline 10, and the upper part of the low-pressure conical evaporator 2 is connected to the third heat transfer tank through the steam pipeline 11. At the entrance of the pipe rack 7, the third heat transfer pipe rack 7 is connected to a condensate collect...

Embodiment 2

[0047] A high-efficiency and energy-saving sewage low-pressure evaporation system, the structure is as shown in Embodiment 1, the difference is that the outlet of the air preheater 3 is connected to the air heater 4 through the preheated air pipe 24, and the air heater 4 is connected to the air heater 4 through the hot air pipe 25 Connected to the inlet of the second heat transfer pipe frame 6, the air heater 4 is an electromagnetic heater, and the electromagnetic heater heats the hot air to 80-120°C. Since the temperature is not too high, the life of the heater is greatly extended, thereby saving equipment maintenance cost.

Embodiment 3

[0049] A high-efficiency and energy-saving sewage low-pressure evaporation system, the structure of which is shown in Embodiment 1, the difference is that the low-pressure conical evaporator 2 is in the shape of a cone, the second heat transfer pipe frame 6 is located inside the low-pressure conical evaporator 2, and the second The middle part of the second heat transfer pipe frame 6 is provided with a hollow shaft 26, the hollow shaft 26 is connected with a transmission system, the second heat transfer pipe frame 6 is fixed on the hollow shaft 26 and rotates with the hollow shaft 26, the hollow shaft 26 is equipped with a hot air pipe, Fixedly installed in the hollow rotating shaft 26, the second heat transfer pipe frame 6 communicates with the hot air pipe, and heat is transferred to the raw water through the second heat transfer pipe frame 6, and the outlet of the hot air pipe is connected to the inlet of the first heat transfer pipe frame 5 connect.

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Abstract

The invention relates to a high-efficiency energy-saving low-pressure evaporation system for sewage and a working method of the system, and belongs to the field of sewage treatment. The working methodcomprises the following processes: the sewage enters an air waste-heat recoverer, after waste heat is absorbed, the heated sewage is conveyed to an inlet of a low-pressure conical evaporator throughan outlet, in the low-pressure conical evaporator, the sewage absorbs heat from a second heat-transfer tube frame, the sewage is turned into steam, the steam enters a third heat-transfer tube frame, because air temperature in an air preheater is reduced, the steam becomes a condensate, and the condensate enters a condensate collection tank for recovery; and cold air enters the air preheater through a circulation fan, the preheated air enters an air heater to be heated, hot air enters the second heat-transfer tube frame to transfer heat to the sewage, low-temperature hot air obtained after heattransfer enters a first heat-transfer tube frame in the air waste-heat recoverer through a hot air tube and a waste hot air tube, and after heat recovery is performed, the air enters a next cycle from a cold air outlet. The system provided by the invention saves energy, reduces consumption, and greatly reduces treatment costs of the sewage; and at the same time, because of low-pressure vacuum operation instead of a pressure container, the system has no danger of explosion, and has greatly-improved safety.

Description

technical field [0001] The invention relates to a high-efficiency and energy-saving sewage low-pressure evaporation system and a working method thereof, belonging to the technical field of sewage treatment. Background technique [0002] In recent years, with the rapid development of industrial production, environmental pollution has become increasingly serious. Therefore, the country has paid more and more attention to environmental governance, and the discharge control of industrial wastewater has become increasingly stringent, and the discharge standard liquid for wastewater has become higher and higher. [0003] High-salt sewage refers to wastewater with a total salt content equal to or higher than 1%, which mainly comes from industrial processes such as chemical industry, papermaking, oil exploration, and large-scale seawater desalination. High-concentration brine and chemical wastewater cannot be directly discharged into urban wastewater The system must be operated to a...

Claims

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Application Information

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IPC IPC(8): C02F1/04
CPCC02F1/04
Inventor 王正顺姜在勇王源
Owner QILU UNIV OF TECH