Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of regeneration circulation method of flue gas desulfurization agent

A desulfurization agent and flue gas technology, applied in the field of industrial wastewater utilization, can solve the problems of expanding the universality of sodium bicarbonate desulfurization, high control system precision requirements, difficult crystallization and sweating rates, etc., to make up for high desulfurization costs and overcome precision Demanding and easy-to-use effects

Inactive Publication Date: 2017-06-16
NORTHWEST UNIV
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The regeneration process and the by-product utilization method require high precision of the control system, consume heat energy, the rate of crystallization and sweating is difficult to effectively control, and the recyclability is not strong. Therefore, it is very meaningful for the regeneration of the desulfurizer sodium bicarbonate and the utilization of by-products issues, thereby reducing costs and expanding the universality of desulfurization with sodium bicarbonate

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Fill the strong alkali gel styrene resin LXI-201 (manufacturer: Xi'an Lanxiao Technology New Materials Co., Ltd.) into the exchange column by wet method, and first wash it with deionized water at a flow rate of 6BV / h Resin until the pH of the effluent is 7-9, then rinse the resin with a volume of 4BV of ammonium bicarbonate solution with a molar concentration of 1mol / L at a flow rate of 1.5BV / h, and finally wash with deionized water at a flow rate of 6BV / h Resin until the pH value of the effluent is 7-9 to obtain HCO 3 - type anion exchange resin.

[0030] 2) HCO 3 - Type anion exchange resin is filled in the anion exchange column by wet method. At room temperature, the mixed solution of sodium bicarbonate desulfurization product sodium sulfate and sodium bicarbonate is passed through the resin bed at a flow rate of 3BV / h, SO 4 2- Resin-bound HCO 3 - An exchange reaction occurs, and the sodium bicarbonate effluent at the bottom of the column is collected, so t...

Embodiment 2

[0031] Embodiment 2: scale-up experiment

[0032] 1) Fill the strong alkali gel styrene resin LXI-201 in the exchange column by wet method, first wash the resin with deionized water at a flow rate of 8BV / h until the pH of the effluent is 7-9, and then use 5BV The ammonium bicarbonate solution with a molar concentration of 1.2mol / L rinses the resin at a flow rate of 1.5BV / h, and then washes the resin with deionized water at a flow rate of 8BV / h until the pH of the effluent is 7-9 to obtain HCO 3 - type anion exchange resin.

[0033] 2) Fill each of the two exchange columns with wet resin (i.e. HCO 3 - type anion exchange resin), and then two exchange columns are connected in series, and the mixed solution of sodium bicarbonate desulfurization product sodium sulfate and sodium bicarbonate is passed through the resin bed at a flow rate of 2BV / h, when the SO in the second exchange column effluent liquid 4 2- When it occurs, stop the collection, regenerate the resins in the tw...

Embodiment 3

[0035] 1) Fill the strong alkali gel styrene resin LXI-201 in the exchange column by wet method, first wash the resin with deionized water at a flow rate of 6BV / h until the pH of the effluent is 7-9, and then use a volume of 3BV, ammonium bicarbonate solution with a molar concentration of 2mol / L rinses the resin at a flow rate of 2BV / h, and then washes the resin with deionized water at a flow rate of 6BV / h until the pH of the effluent is 7-9 to obtain HCO 3 - type anion exchange resin.

[0036] 2) HCO 3 - Type anion exchange resin is filled in the anion exchange column by wet method. At room temperature, the mixed solution of sodium bicarbonate desulfurization product sodium sulfate and sodium bicarbonate with a pH value of 7 passes through the resin bed at a flow rate of 8BV / h, SO 4 2- Resin-bound HCO 3 - The exchange reaction occurs, and the effluent at the bottom of the column is collected, so that the SO in the effluent 4 2- Occurrence is the end point, and the vol...

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

A regeneration circulation method of a flue gas desulfurizer, the HCO3-type anion exchange resin is filled in an exchange column by a wet method, the sodium bicarbonate desulfurization product sodium sulfate and sodium bicarbonate mixed solution is passed through the resin bed, and the carbonic acid at the bottom of the column is collected. Sodium bicarbonate effluent; after the effluent is crystallized, sodium bicarbonate is obtained, and the regeneration of the sodium bicarbonate desulfurizer is completed; deionized water, ammonium bicarbonate or carbonic acid solution are used to successively wash the invalid ion exchange resin filled in the exchange column for desulfurization. Regenerate, and finally wash the resin with deionized water to obtain HCO3-type resin again. The invention introduces anion exchange resin to complete the regeneration of sodium bicarbonate desulfurizer, and the loaded resin can be reused after regeneration, the resin regeneration effluent also has commercial value, no waste residue and waste liquid discharge, and improves the green economy and utilization of the process rate, providing a reasonable path for recycling.

Description

technical field [0001] The invention belongs to the technical field of industrial waste water utilization, and in particular relates to a regeneration cycle method of a flue gas desulfurizer. Background technique [0002] At present, my country's air pollution is becoming more and more serious. As the world's largest coal producer and consumer, the total amount of sulfur dioxide emissions ranks first in the world. Under this background, flue gas desulfurization technology has developed rapidly in recent years, but a large number of desulfurization By-products also follow. For the traditional limestone-gypsum method, my country produced 52.3 million tons of desulfurized gypsum in 2010 alone. The comprehensive utilization of desulfurized gypsum is poor. At this stage, it is mainly discarded and stacked, which wastes land resources. And produce environmental pollution. Therefore, the innovation and optimization of the desulfurization and denitrification process is an urgent task...

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 Patents(China)
IPC IPC(8): B01D53/96B01D53/50
CPCB01D53/501B01D53/96B01D2251/304B01D2257/302
Inventor 杨岚马晓迅陈斌张香
Owner NORTHWEST UNIV