A heat integrated device for ammonia distillation and desulfurization by using chemical products
A heat integration and ammonia distillation technology, applied in the field of H2S desorption tower heat source, can solve the problems not involving heat integration between towers, and achieve the effects of synchronous optimization of heat, saving cooling water, and reducing power consumption
Active Publication Date: 2013-11-13
DALIAN UNIV OF TECH
View PDF9 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] The above-mentioned patents mainly carry out energy-saving transformation of a single tower, and do not involve heat integration between towers
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0022] As shown in the attached figure, in H 2 A reboiler for ammonia distilled wastewater is added at the bottom of the S desorption tower. The shell side of the reboiler is connected to the bottom of the desorption tower, and the tube side of the reboiler is connected to the ammonia distilled wastewater after heat exchange. Under normal working conditions, the temperature of the desulfurization lean liquid at the bottom of the desorption tower is 55-60°C, and the temperature of the ammonia distillation wastewater is 78-85°C. 65°C.
[0023] For the existing process, the pipeline transformation of the ammonia distillation tower overhead splitter is carried out so that it is compatible with the H 2 The bottom of the S desorption column is connected, and the H 2 The desulfurization lean liquid at the bottom of the S desorption tower is sent to the shell side of the top compressor of the ammonia distillation tower, and after heat exchange with the ammonia gas at the top of the ...
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
Login to View More Abstract
The present invention discloses a heat integrated device which can be wildly used between an ammonia distillation process and a desulfurization process in coking industry. The device comprises a steam reboiler, a H2S desorption tower, an ammonia distillation tower, an ammonia distillation wastewater reboiler, and an ammonia dephlegmator. The bottom of the H2S desorption tower is connected to the dephlegmator at the top of the ammonia distillation tower, the bottom of the H2S desorption tower is connected to the ammonia distillation wastewater reboiler, a desulfuration barren solution at the bottom of the H2S desorption tower is heated by using an ammonia distillation wastewater heater and the dephlegmator at the top of the ammonia distillation tower, and the low temperature exhaust heat of the ammonia distillation wastewater and the latent heat of water vapor in the ammonia distillation tower are recovered. According to the invention, via heat integration among different units, gradient utilization of energy is achieved, reducing the quantity of shared works, water consumption of the whole plant, and operating costs.
Description
technical field [0001] The invention provides a heat recovery method that can be widely used in the coking industry, and relates to a heat integration technology for ammonia distillation and desulfurization devices, specifically using the waste heat of the ammonia distillation tower as H 2 S desorption tower heat source. Background technique [0002] In the recovery process of chemical products, the ammonia distillation process usually uses water vapor stripping to distill ammonia. The rich ammonia water is discharged from the top of the tower after stripping and desorbing, and the ammonia distillation wastewater is discharged from the bottom of the tower. The temperature at the bottom of the ammonia distillation tower is usually around 105-108°C. The ammonia distillation wastewater first exchanges heat with the ammonia-rich water after ammonia washing. After the heat exchange, the temperature of the ammonia distillation wastewater drops to 78-85°C, and then passes through t...
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
Login to View More IPC IPC(8): C02F1/20B01D53/14C01C1/02
Inventor 董宏光胡定华张毅赵国强于博
Owner DALIAN UNIV OF TECH