Utilization device for waste heat boiler blow-down water in desulfurization regeneration

Abstract

The utility model discloses a device for utilizing waste heat boiler blow-off water in desulfurization regeneration, which relates to the technical field of flue gas desulfurization regeneration in the smelting industry and comprises a waste heat boiler blow-off pipe, a heat exchanger, a recovery tank, a desulfurization lean and rich liquid heat exchanger and a regeneration tower. The heat exchanger is in butt joint with a rich liquid pipe behind the desulfurization lean and rich liquid heat exchanger, the rich liquid pipe is provided with a valve I, a pipeline for communicating the heat exchanger with the regeneration tower is provided with a valve II, and water in a waste heat boiler blow-off pipe is condensed by the heat exchanger and then is discharged into a recovery tank for standby use as pure water. According to the device for utilizing the waste heat boiler blow-down water in the desulfurization regeneration process, the steam required by an original desulfurizing agent in the regeneration process is reduced from 11t / h to 7.5 t / h, regenerated organic amine can be preheated by utilizing the boiler blow-down water, and the enthalpy value of the organic amine is increased, so that the steam use amount in the later period is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization and regeneration in the smelting industry, and in particular to a device for utilizing waste heat boiler wastewater in desulfurization and regeneration. Background Art

[0002] With the requirements of the dual-carbon economy, how to save energy and reduce emissions has become a major goal of the current smelting process. The flue gas generated during the smelting process needs to be absorbed and enriched by an organic amine desulfurizer. A large amount of saturated steam is required in the regeneration process of the organic amine desulfurizer, which consumes a lot of energy. In the pyrometallurgical process, since the flue gas contains a lot of heat, a waste heat boiler is required for cooling. The steam generated by the waste heat boiler is basically used uniformly, but in the daily operation and maintenance process, the waste heat boiler needs to be continuously and regularly discharged according to the water quality requirements. This part of the water and heat is completely discharged and wasted. The organic amine regeneration process needs to be heated from room temperature to above 95°C to meet the process requirements. At present, the boiler wastewater can be used to preheat the regenerated organic amine to increase the enthalpy value of the organic amine to reduce the amount of steam used in the later stage. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the utility model provides a device for utilizing waste water discharged from waste heat boilers in desulfurization regeneration, so as to solve the technical problem that in the daily operation and maintenance process, waste heat boilers need to discharge waste water continuously and regularly according to water quality requirements, and this part of water and heat are completely discharged and wasted.

[0005] (II) Technical solution

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A device for utilizing waste heat boiler wastewater in desulfurization and regeneration, comprising: a waste heat boiler blowdown pipe, a heat exchanger, a recovery tank, a desulfurization lean-rich liquid heat exchanger, and a regeneration tower. The heat exchanger is connected to the rich liquid pipe after the desulfurization lean-rich liquid heat exchanger, the rich liquid pipe is equipped with a valve one, and a valve two is installed on the pipeline connecting the heat exchanger and the regeneration tower. The water in the waste heat boiler blowdown pipe is condensed by the heat exchanger and then discharged into the recovery tank as pure water for standby use.

[0008] Preferably, the waste heat boiler sewage pipe is connected with an upper valve of a flow meter, a flow meter and a lower valve of a flow meter.

[0009] Preferably, the calorific value of the rich liquid after heat exchange in the desulfurization lean-rich liquid heat exchanger is lower than the calorific value of the waste water discharged from the waste heat boiler blowdown pipe.

[0010] Preferably: the heat exchanger includes a plate-cooled heat exchanger and a shell-and-tube heat exchanger, and a valve three is installed on the pipeline connecting the desulfurization lean-rich liquid heat exchanger and the regeneration tower.

[0011] (III) Beneficial effects

[0012] Through the device for utilizing waste heat boiler wastewater in the desulfurization regeneration process, the steam required for the original desulfurizer in the regeneration process is reduced from 11t / h to 7.5t / h. The boiler wastewater can be used to preheat the regenerated organic amine to increase the enthalpy value of the organic amine, thereby reducing the subsequent steam usage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0014] Figure 1 It is the overall structure diagram of the utility model.

[0015] Legend: 10. Waste heat boiler drain pipe; 11. Valve above flow meter; 12. Flow meter; 13. Valve below flow meter; 20. Heat exchanger; 21. Valve one; 22. Valve three; 23. Valve two; 24. Regeneration tower; 25. Desulfurization rich and poor liquid heat exchanger; 30. Recovery tank. DETAILED DESCRIPTION

[0016] The embodiment of the present application provides a device for utilizing waste water discharged from waste heat boilers in desulfurization regeneration, thereby effectively solving the technical problem that in the daily operation and maintenance process, waste heat boilers need to discharge waste water continuously and regularly according to water quality requirements, and this part of water and heat is completely discharged and wasted.

[0017] Example 1

[0018] The overall idea of ​​the technical solution in the embodiment of the present application is as follows:

[0019] like Figure 1 As shown, in view of the problems existing in the prior art, the utility model provides a device for utilizing waste heat boiler wastewater in desulfurization regeneration, comprising: a waste heat boiler blowdown pipe 10, a heat exchanger 20, a desulfurization lean-rich liquid heat exchanger 25, a regeneration tower 24 and a recovery tank 30, wherein the heat exchanger 20 is connected to the rich liquid pipe after the desulfurization lean-rich liquid heat exchanger 25, a valve 1 21 is installed on the rich liquid pipe, and a valve 2 23 is installed on the pipe connecting the heat exchanger 20 and the regeneration tower 24, and the water in the waste heat boiler blowdown pipe 10 is condensed by the heat exchanger 20 and then discharged to the recovery tank 30 as pure water for standby use;

[0020] The waste heat boiler blowdown pipe 10 is connected with a flow meter upper valve 11, a flow meter 12 and a flow meter lower valve 13. The heat value of the rich liquid after heat exchange in the desulfurization lean-rich liquid heat exchanger 25 is lower than the heat value of the waste water discharged from the waste heat boiler blowdown pipe 10. The heat exchanger 20 includes a plate cooling type and a shell and tube type heat exchanger. A valve 3 22 is installed on the pipeline connecting the desulfurization lean-rich liquid heat exchanger 25 and the regeneration tower 24.

[0021] The waste heat boiler sewage pipe 10 includes waste heat boilers used in smelting and sulfuric acid smelting processes. The sewage includes continuous sewage discharge and regular sewage discharge. The sewage is discharged into the recovery tank 30 as pure water for standby use, including desalination water, liquid preparation water, and make-up water for the desulfurization process.

[0022] Working principle: Through the device for utilizing waste heat boiler wastewater during the desulfurization regeneration process, the steam required for the original desulfurizer in the regeneration process is reduced from 11t / h to 7.5t / h.

[0023] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A device for utilizing waste heat boiler wastewater in desulfurization regeneration, characterized in that: The device for utilizing waste heat boiler wastewater in desulfurization regeneration comprises: a waste heat boiler wastewater pipe (10), a heat exchanger (20), a desulfurization lean-rich liquid heat exchanger (25), a regeneration tower (24) and a recovery tank (30); The heat exchanger (20) is connected to the rich liquid pipe after the desulfurization lean-rich liquid heat exchanger (25), the rich liquid pipe is installed with a valve 1 (21), and the pipeline connecting the heat exchanger (20) and the regeneration tower (24) is installed with a valve 2 (23); The water in the waste heat boiler drain pipe (10) is condensed by the heat exchanger (20) and then discharged into the recovery tank (30) as pure water for standby use.

2. The device for utilizing waste heat boiler wastewater in desulfurization regeneration according to claim 1, characterized in that: The waste heat boiler sewage pipe (10) is connected to a flow meter upper valve (11), a flow meter (12) and a flow meter lower valve (13).

3. The device for utilizing waste heat boiler wastewater in desulfurization regeneration according to claim 2, characterized in that: The calorific value of the rich liquid after heat exchange in the desulfurization lean-rich liquid heat exchanger (25) is lower than the calorific value of the waste water discharged from the waste heat boiler waste water pipe (10).

4. The device for utilizing waste heat boiler wastewater in desulfurization regeneration according to claim 1, characterized in that: The heat exchanger (20) includes a plate cooling type and a shell and tube type heat exchanger.

5. The device for utilizing waste heat boiler wastewater in desulfurization regeneration according to claim 1, characterized in that: A valve three (22) is installed on the pipeline connecting the desulfurization lean-rich liquid heat exchanger (25) and the regeneration tower (24).

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