CN219231925U

CN219231925U - Desulfurization thick liquid waste heat recovery device

Info

Publication number: CN219231925U
Application number: CN202320659308.1U
Authority: CN
Inventors: 王立博
Original assignee: Shenyang Xinghe Heating Co ltd
Current assignee: Shenyang Xinghe Heating Co ltd
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-06-23
Anticipated expiration: 2033-03-30

Abstract

The utility model discloses a desulfurization slurry waste heat recovery device, which relates to the technical field of boiler waste heat recovery and comprises a desulfurization tower, a desulfurization tank, a desulfurization pump, a first conveying pipe, a second conveying pipe, a third conveying pipe, a fourth conveying pipe, a heat exchanger and a limestone powder bin, wherein one end of the first conveying pipe is communicated with a position close to the bottom end in the desulfurization tank, the other end of the first conveying pipe is communicated with an inlet of the desulfurization pump, an outlet of the desulfurization pump is communicated with one end of the second conveying pipe, and the other end of the second conveying pipe is communicated with the desulfurization tower; according to the utility model, the heat exchanger is additionally arranged on the desulfurization slurry recovery pipeline to heat water in the coil pipe arranged on the outer side wall of the limestone powder bin, so that the heat of the desulfurization slurry is recycled, the limestone powder in the bin is prevented from being damped and hardened, and the electric heating device of the limestone powder bin body is saved, thereby saving electric energy and reducing heat loss.

Description

Desulfurization thick liquid waste heat recovery device

Technical Field

The utility model relates to the technical field of boiler waste heat recovery, in particular to a desulfurization slurry waste heat recovery device.

Background

Desulphurisation, which is generally referred to as the process of removing sulphur from fuel before combustion and removing sulphur from flue gas before discharge, is one of the important technical measures for preventing and treating atmospheric pollution, and along with the development of industry and the improvement of living standard of people, the desire for energy is also continuously increased, and SO in coal-fired flue gas is also increased ₂ Has become the main cause of atmospheric pollution and reduces SO ₂ Pollution is urgent in the current atmospheric environment control, and a plurality of flue gas desulfurization processes are widely applied in industry, and have important practical significance for the control of various boiler and incinerator tail gases.

The temperature of the desulfurization slurry returned to the tank from the desulfurization tower after desulfurization in the winter operation of the coal-fired heat source plant is between 40 and 50 ℃, and the heat of the desulfurization slurry is wasted if the desulfurization slurry is not recycled, in addition, the higher temperature in the desulfurization tower is unfavorable for gas-liquid mass transfer, so that the desulfurization efficiency is reduced, and therefore, the development of a desulfurization slurry waste heat recovery device is necessary.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides the desulfurization slurry waste heat recovery device, which is characterized in that a heat exchanger is additionally arranged on a desulfurization slurry recovery pipeline to heat water in a coil pipe arranged on the outer side wall of a limestone powder bin, so that heat of desulfurization slurry is recycled, the limestone powder in the bin is prevented from being damped and hardened, and an electric heating device of a limestone powder bin body is saved, thereby saving electric energy and reducing heat loss.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a desulfurization thick liquid waste heat recovery device, includes desulfurizing tower, desulfurization pond, desulfurization pump, first conveyer pipe, second conveyer pipe, third conveyer pipe, fourth conveyer pipe, heat exchanger and limestone powder storehouse, first conveyer pipe one end intercommunication sets up the position that is close to the bottom in the desulfurization pond, and the other end is connected with the entry intercommunication of desulfurization pump, the export of desulfurization pump is connected with the one end intercommunication of second conveyer pipe, the other end of second conveyer pipe link up the setting in the desulfurizing tower the second conveyer pipe bottom intercommunication in the desulfurizing tower is provided with a plurality of shower nozzles, the desulfurization pump can carry the desulfurization solution in the desulfurization pond in the desulfurizing tower, the one end and the desulfurizing tower bottom intercommunication of third conveyer pipe are connected, and the other end and heat exchanger's hot medium entry intercommunication are connected, heat exchanger's hot medium export is connected with the one end of fourth conveyer pipe, the other end intercommunication of fourth conveyer pipe is connected with the desulfurization thick liquid circulating pump, the export and the desulfurization pond intercommunication of desulfurization pump are connected, the thick liquid circulating pump can carry the thick liquid of tower bottom to the desulfurization pond in, the heat exchanger's bottom the desulfurization pond, the export is connected with the cold-phase circulation pipe, the other end is connected with the cold-heat exchanger, the cold-cycle pipe is connected with the cold-phase circulation pipe, the other end is connected with the inlet pipe, the cold-cycle pipe is connected with the cold-cycle pipe, and is connected with the cold-phase circulation pipe.

Preferably, a plurality of layers of heat preservation cotton are arranged on the outer side wall of the limestone powder bin and positioned at the bottom of the coil pipe, and a heat preservation layer is arranged on the outer surface of the coil pipe.

Preferably, a plurality of clamping blocks are arranged below the heat-insulating cotton layers.

Preferably, a guard board is arranged on the outer surface of the heat insulation layer.

The utility model provides a desulfurization slurry waste heat recovery device, which has the following beneficial effects:

1. according to the utility model, the heat exchanger is additionally arranged on the desulfurization slurry recovery pipeline to heat water in the coil pipe arranged on the outer side wall of the limestone powder bin, so that the heat of the desulfurization slurry is recycled, the limestone powder in the bin is prevented from being damped and hardened, and the electric heating device of the limestone powder bin body is saved, thereby saving electric energy and reducing heat loss;

2. the water is heated by the desulfurization slurry through the heat exchanger, so that the temperature of the desulfurization slurry is reduced, the desulfurization solution circulated into the desulfurization tower is further used for properly cooling the flue gas, and the desulfurization effect is improved; the outer surface of the coil pipe is provided with an insulating layer to perform heat preservation treatment on the outer surface of the limestone powder bin, so that heat loss is prevented.

Drawings

FIG. 1 is a schematic diagram of a desulfurization slurry waste heat recovery device according to the present utility model.

FIG. 2 is an enlarged view of part A of FIG. 1 of a desulfurization slurry waste heat recovery device according to the present utility model.

In the figure: 1. a desulfurizing tower; 2. a desulfurization pond; 3. a desulfurization pump; 4. a first delivery tube; 5. a spray head; 6. a second delivery tube; 7. a heat exchanger; 8. a guard board; 9. a desulfurization slurry circulation pump; 10. a limestone powder bin; 11. a first water inlet pipe; 12. a circulation pump; 13. a water return pipe; 14. a heat preservation layer; 15. a coiled pipe; 16. thermal insulation cotton; 17. a clamping block; 18. a third delivery tube; 19. a fourth conveying pipe; 20. and a second water inlet pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-2, the desulfurization slurry waste heat recovery device comprises a desulfurization tower 1, a desulfurization pond 2, a desulfurization pump 3, a first conveying pipe 4, a second conveying pipe 6, a third conveying pipe 18, a fourth conveying pipe 19, a heat exchanger 7 and a limestone powder bin 10, wherein one end of the first conveying pipe 4 is communicated with a position close to the bottom end in the desulfurization pond 2, the other end of the first conveying pipe is communicated with an inlet of the desulfurization pump 3, an outlet of the desulfurization pump 3 is communicated with one end of the second conveying pipe 6, the other end of the second conveying pipe 6 is communicated with the desulfurization tower 1, a plurality of spray heads 5 are communicated with the bottom of the second conveying pipe 6 arranged in the desulfurization tower 1, the desulfurization pump 3 can convey desulfurization solution in the desulfurization pond 2 into the desulfurization tower 1, one end of the third conveying pipe 18 is communicated with the bottom of the desulfurization tower 1, the other end is connected with a heat medium inlet of the heat exchanger 7, a heat medium outlet of the heat exchanger 7 is connected with one end of a fourth conveying pipe 19, the other end of the fourth conveying pipe 19 is connected with a desulfurization slurry circulating pump 9 in a communicating way, an outlet of the desulfurization slurry circulating pump 9 is connected with a desulfurization tank 2 in a communicating way, the desulfurization slurry circulating pump 9 can convey desulfurization slurry at the bottom of the desulfurization tower 1 into the desulfurization tank 2, a cold medium outlet of the heat exchanger 7 is connected with a second water inlet pipe 20 in a communicating way, the other end of the second water inlet pipe 20 is connected with a circulating pump 12 in a communicating way, an outlet of the circulating pump 12 is connected with a first water inlet pipe 11 in a communicating way, the other end of the first water inlet pipe 11 is connected with a coil 15, the coil 15 is arranged on the outer side wall of a limestone powder bin 10, the other end of the coil 15 is connected with a water return pipe 13 in a communicating way, the other end of the water return pipe 13 is communicated and connected with a cold medium inlet of the heat exchanger 7; a plurality of layers of heat-insulating cotton 16 are arranged on the outer side wall of the limestone powder bin 10 and positioned at the bottom of the coil 15, and a heat-insulating layer 14 is arranged on the outer surface of the coil 15; a plurality of clamping blocks 17 are arranged below the multi-layer heat-insulating cotton 16; the outer surface of the heat preservation layer 14 is provided with a guard plate 8.

The detailed connection means are known in the art, and the following mainly introduces the working principle and process, specifically as follows:

in the utility model, the circulating pump 12, the desulfurization pump 3 and the desulfurization slurry circulating pump 9 are all connected with an external electric control system through wires, and the above devices and the connection modes are all in the prior art and are not described in detail herein.

According to the description of the utility model, as shown in figures 1-2, when the desulfurization tower is used, boiler flue gas enters through an inlet at the bottom of the desulfurization tower 1 and is discharged from an outlet at the top of the desulfurization tower 1, a desulfurization pump 3 pumps desulfurization solution in the desulfurization tank 2 out through a first conveying pipe 4 communicated and connected with the inlet of the desulfurization pump, the desulfurization solution is conveyed into the desulfurization tower 1 through a second conveying pipe 6 communicated and connected with the outlet of the desulfurization pump, the desulfurization solution is sprayed into the desulfurization tower 1 through a plurality of spray heads 5 arranged at the bottom of the second conveying pipe 6 in the desulfurization tower 1, the flue gas is subjected to desulfurization treatment, one end of a third conveying pipe 18 is communicated and connected with the bottom of the desulfurization tower 1, the other end of the third conveying pipe is communicated and connected with a heat medium inlet of a heat exchanger 7, the heat medium outlet of the heat exchanger 7 is connected with one end of a fourth conveying pipe 19, the other end of the fourth conveying pipe 19 is communicated and connected with a desulfurization slurry circulating pump 9, the outlet of the desulfurization slurry circulating pump 9 is communicated with the desulfurization tank 2, so that the desulfurization slurry circulating pump 9 can convey desulfurization slurry in the desulfurization tower 1 into the desulfurization tank 2 for circulation, the middle of the desulfurization slurry passes through the heat medium side of the heat exchanger 7 in the process of entering the desulfurization tank 2, as the cold medium outlet of the heat exchanger 7 is connected with the second water inlet pipe 20, the second water inlet pipe 20 is communicated with the inlet of the circulating pump 12, the outlet of the circulating pump 12 is connected with the inlet of the coil pipe 15 through the first water inlet pipe 11, the outlet of the coil pipe 15 is connected with the cold medium inlet of the heat exchanger 7 through the water return pipe 13, the coil pipe 15 is arranged on the outer side wall of the limestone powder bin 10, the desulfurization slurry exchanges heat with water through the heat exchanger 7 to heat the water, the heated water flows into the coil pipe 15 through the circulating pump 12 to heat the shell of the limestone powder bin 10, the heat of desulfurization thick liquid has carried out recycle, prevents that the limestone powder in the storehouse from being wet and hardening, has saved the electric heater unit of limestone powder storehouse 10 body to practiced thrift the electric energy, reduced thermal loss, make the temperature of desulfurization thick liquid reduce simultaneously, make the desulfurization solution that circulates to in the desulfurizing tower 1 suitably cool down to the flue gas, promoted desulfur effect, the feed inlet has been seted up at limestone powder storehouse 10 top, and the bottom is provided with discharging device, and limestone powder is added in annotating furnace and is carried out desulfurization treatment to the flue gas.

There is a possibility of implementation that a plurality of layers of heat insulation cotton 16 are arranged on the outer side wall of the limestone powder bin 10 and positioned at the bottom of the coil 15, and a heat insulation layer 14 is arranged on the outer surface of the coil 15 to perform heat insulation treatment on the outer surface of the limestone powder bin 10 so as to prevent heat loss.

There is a possibility of implementation that a plurality of clamping blocks 17 are arranged below the multi-layer heat-insulating cotton 16, and the plurality of clamping blocks 17 fixedly support the coil 15.

There is a possibility of implementation that the outer surface of the heat-insulating layer 14 is provided with a protecting plate 8 for protecting the outer surface of the limestone powder bin 10.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a desulfurization thick liquid waste heat recovery device, includes desulfurizing tower (1), desulfurization pond (2), desulfurization pump (3), first conveyer pipe (4), second conveyer pipe (6), third conveyer pipe (18), fourth conveyer pipe (19), heat exchanger (7) and limestone powder storehouse (10), its characterized in that, first conveyer pipe (4) one end intercommunication sets up in desulfurization pond (2) the position near the bottom, and the other end is connected with desulfurization pump (3) entry intercommunication, desulfurization pump (3) export and second conveyer pipe (6) one end intercommunication are connected, the other end of second conveyer pipe (6) link up and set up in desulfurizing tower (1), and second conveyer pipe (6) bottom intercommunication that sets up in desulfurizing tower (1) is provided with a plurality of shower nozzles (5), desulfurization pump (3) can be with the desulfurization solution in desulfurization pond (2) transport to desulfurizing tower (1) in, one end and desulfurizing tower (1) bottom intercommunication of third conveyer pipe (18) are connected, and the other end and heat exchanger (7) entry intercommunication, fourth conveyer pipe (19) of heat exchanger (7) one end intercommunication, fourth conveyer pipe (19) are connected with the medium of circulating fluid (9), the outlet of desulfurization thick liquid circulating pump (9) is connected with desulfurization pond (2) intercommunication, desulfurization thick liquid that desulfurization thick liquid circulating pump (9) can carry desulfurization tower (1) bottom in desulfurization pond (2), the cold medium outlet intercommunication of heat exchanger (7) is connected with second inlet tube (20), the other end intercommunication of second inlet tube (20) is connected with circulating pump (12), the outlet intercommunication of circulating pump (12) is connected with first inlet tube (11), the other end of first inlet tube (11) is connected with coil pipe (15), coil pipe (15) set up on the lateral wall in limestone powder storehouse (10), the other end intercommunication of coil pipe (15) is connected with wet return (13), the other end of wet return (13) is connected with the cold medium entry intercommunication of heat exchanger (7).

2. The desulfurization slurry waste heat recovery device according to claim 1, wherein a plurality of layers of heat preservation cotton (16) are arranged on the outer side wall of the limestone powder bin (10) and positioned at the bottom of the coil pipe (15), and a heat preservation layer (14) is arranged on the outer surface of the coil pipe (15).

3. The desulfurization slurry waste heat recovery device according to claim 2, wherein a plurality of clamping blocks (17) are arranged below the heat preservation cotton (16).

4. The desulfurization slurry waste heat recovery device according to claim 2, wherein the outer surface of the heat-insulating layer (14) is provided with a guard plate (8).