Energy-saving ammonia water distillation technology

An ammonia water and steam technology, applied in heating water/sewage treatment, sustainable manufacturing/processing, climate sustainability, etc., can solve the problem of high heat supply, high energy consumption, and water vapor phase transition heat that is not reasonably recycled. and other problems, to achieve the effect of achieving heat balance and reducing the amount of cooling water

Active Publication Date: 2014-03-19
薛斌
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] And the place that conventional ammonia water distillation process needs to improve is, the one, need heat source such as a large amount of fresh steams to provide heat for distillation; The 2nd, use a large amount of cooling water to shrink

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Energy-saving ammonia water distillation technology
  • Energy-saving ammonia water distillation technology
  • Energy-saving ammonia water distillation technology

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0057] Preferred embodiment

[0058] The raw ammonia water at about 75°C after fully standing and filtered by the ceramic tube is heated to about 96°C in the ammonia water / waste water heat exchanger with the waste water from the bottom of the distillation tower, and then enters the upper part of the distillation tower.

[0059] Ammonia vapor (containing hydrogen sulfide, etc.) at the upper part of the distillation tower at about 102°C is condensed and cooled to about 100°C by the circulating wastewater in the separator, and then sent to the outside of the boundary for further treatment.

[0060] The distilled ammonia wastewater at the bottom of the distillation tower at about 105°C exchanges heat with the raw ammonia water in the ammonia water / wastewater heat exchanger to cool to 86°C and enters the evaporator. The 20kPa(a), 60℃ vacuum vaporizing vapor that escapes from the top of the evaporator enters the MVR vapor compressor, and the compressed vaporized vapor enters the lower part...

Example Embodiment

[0074] Example 1

[0075] The present invention will be described in further detail below in conjunction with the drawings and embodiments.

[0076] In the ammonia distillation process according to the drawings of the present invention, the raw ammonia water first exchanges heat with waste water in the raw ammonia water / waste water heat exchanger 6, and then exchanges heat with the waste water in the raw ammonia water / waste water heater 3 or in the splitter 2 After heat exchange with ammonia vapor, it enters the upper part of the distillation tower 1.

[0077] Ammonia vapor (contains H 2 S and HCN and CO 2 Other impurities) escape from the top of the distillation tower, are condensed and cooled by the circulating waste water or raw ammonia water in the separator 2, and then sent to the outside of the boundary.

[0078] The high-temperature waste water at the bottom of the distillation tower 1 is cooled by the raw ammonia water in the raw ammonia water / waste water heater 3 or does not ...

Example Embodiment

[0087] Example 2 (attached figure 2 ):

[0088] The process is similar to Example 1.

[0089] The raw material ammonia water from outside the boundary area exchanges heat with the effluent wastewater from the evaporator to 70-75°C, and then exchanges heat with the distillation tower ammonia vapor to 125-130°C in the separator and enters the upper part of the distillation tower. The 140°C~145 ammonia vapor that escapes from the top of the distillation tower is respectively condensed and cooled to 90°C~94 by the evaporator circulating wastewater and raw ammonia water in the separator, and the 13.5~14% ammonia vapor is sent out of the boundary. The circulating waste water from the evaporator is heated by the ammonia vapor from 80°C to 85°C to 115°C to 120°C in the separator, then returns to the evaporator and evaporates part of the steam. The waste water cooled to 88-93°C by the raw ammonia water enters the evaporator and flashes. The evaporating steam at 80-85°C will enter the MVR...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides an energy-saving ammonia water distillation production method which comprises the following steps: (a) providing raw material ammonia water containing NH3 and impurities generated in the production process of chemical enterprises, wherein the impurities comprise H2S, HCN and/or CO2 impurities; (b) performing heat exchange between high-temperature wastewater at the bottom of a distillation tower and the raw material ammonia water and allowing the high-temperature wastewater to enter an evaporator or directly allowing the high-temperature wastewater to enter the evaporator, and performing partial flashing to generate first low-entropy steam, so that the temperature is reduced to be 55-125 DEG C; (c) circulating and feeding the low-temperature wastewater in the evaporator into a dephlegmator, heating the low-temperature wastewater to the temperature of 70-130 DEG C by ammonia steam, returning the wastewater back to the evaporator, and performing partial flashing to generate second low-entropy steam; (d) compressing the obtained first low-entropy steam and second low-entropy steam in the evaporator into saturated high-entropy steam at the temperature of 103-165 DEG C by an MVR (Mechanical Vapor Recompression) compressor, and feeding the saturated high-entropy steam into the distillation tower to serve as a heat supply source for distillation.

Description

technical field [0001] The invention relates to a method for processing raw ammonia water by adopting distillation, evaporation and MVR compression integrated process, especially suitable for the NH-containing NH 3 and H 2 S and HCN, CO 2 Ammonia treatment of raw materials such as impurities. Background technique [0002] According to C (carbon), H (hydrogen), S (sulfur), N (nitrogen), O 2 (Oxygen) and other components are different and the selection of processing technology generates NH in the production process 3 and H 2 S and HCN, CO 2 and other impurities, these impurities are dissolved in water to form raw ammonia water. Although the raw ammonia water itself has little practical value and the cost of treatment is high, the strict requirements of environmental protection do not allow its direct discharge. [0003] In order to solve the outlet of the raw ammonia water, the NH in the raw ammonia water is generally distilled 3 and H 2 S and HCN are separated and re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F1/04
CPCY02P20/10
Inventor 卫宏远
Owner 薛斌
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap