Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Dual-tower parallel urea synthesizing device

A synthesis device and parallel technology, which is applied in the field of double-tower parallel urea synthesis device, can solve the problems such as the ineffective improvement of urea production conversion rate, the inability to reach the theoretical value, and the reduction of height-diameter ratio, saving manpower and supporting facilities. , the effect of increasing production capacity and prolonging residence time

Inactive Publication Date: 2010-03-03
HUAQIANG CHEM GRP
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the current small and medium-sized urea production units adopt the full circulation production process of aqueous solution. This technology uses a synthesis tower with a set of pipelines, and the conversion rate is low.
In theory, improving the conversion rate of urea in a single column can be achieved by increasing the number of trays, adopting high-efficiency trays, increasing the flow rate to form a plug flow, and reducing the aspect ratio. However, in practice, due to production intensity, production load, and manufacturing standards Influenced by other factors, the effect of improving the conversion rate of urea production is not obvious and cannot reach the theoretical value. Moreover, the above-mentioned method requires large investment, complicated operation, and poor feasibility; in addition, in the single-tower urea synthesis process, once the synthesis tower fails, it must be Shutdown for maintenance may easily cause large production losses

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
  • Dual-tower parallel urea synthesizing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Such as figure 1 As shown, the present invention is based on the urea synthesis tower, and the original single tower is changed into double tower parallel connection. The liquid ammonia feed pipes 2,8, the carbon dioxide feed pipes 3,9 and the first liquid feed pipes 4,10 are connected, and the tops of the two urea synthesis towers 1,7 are respectively provided with discharge pipes 5,5', The two discharge pipes 5, 5' are connected together and communicate with the discharge main pipe 6.

[0014] Working process of the present invention is as follows:

[0015] Use a liquid ammonia high-pressure pump to inject ammonia gas into the liquid ammonia feed pipes 2 and 8, use a compressor to pump carbon dioxide into the carbon dioxide feed pipes 3 and 9, and use a pump to pump a liquid A into a liquid ammonia feed pipe In 4 and 10, the three materials ammonia, carbon dioxide and a liquid enter the urea synthesis towers 1 and 7 through their respective pipelines, and react unde...

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 relates to a dual-tower parallel urea synthesizing device, comprising two urea synthesizing towers. Each urea synthesizing tower is communicated with respective liquid ammonia feed pipe,carbon dioxide feed pipe and nail liquid feed pipe; discharge pipes are respectively arranged at the tops of the two urea synthesizing towers; two discharge pipes are connected together and then communicated with a discharge main pipe; and the size and the specification of the two urea synthesizing towers are same. The dual-tower parallel urea synthesizing device reduces the production strength of the urea synthesizing towers, prolongs the stay time of materials in the synthesizing towers, improves the urea synthesizing conversion rate and the yield capacity, has less investment and quick extension and production, saves labor force and matched facilities, allows to repair synthesizing towers having faults or stop the overhaul of any one synthesizing tower under the condition of not stopping production and has simples operation and flexible adjustment.

Description

technical field [0001] The invention relates to urea production equipment, in particular to a double-tower parallel urea synthesis device. Background technique [0002] Most of the current small and medium-sized urea production units adopt the full circulation production process of aqueous solution. This technology uses a synthesis tower with a set of pipelines, and the conversion rate is low. In theory, improving the conversion rate of urea in a single column can be achieved by increasing the number of trays, adopting high-efficiency trays, increasing the flow rate to form a plug flow, and reducing the aspect ratio. However, in practice, due to production intensity, production load, and manufacturing standards Influenced by other factors, the effect of improving the conversion rate of urea production is not obvious and cannot reach the theoretical value. Moreover, the above-mentioned method requires large investment, complicated operation, and poor feasibility; in addition,...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C07C273/04
CPCY02P20/141
Inventor 余华强
Owner HUAQIANG CHEM GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com