Flue gas desulfurization device with waste heat recovery structure

Abstract

The utility model relates to the technical field of flue gas desulfurization, in particular to a flue gas desulfurization device with a waste heat recovery structure, which comprises a flue gas desulfurization tank, a water outlet and a water inlet are distributed on the left side of the flue gas desulfurization tank from top to bottom, a flue gas inlet pipe is arranged at the front end of the flue gas desulfurization tank, and a flue gas exhaust pipe is mounted at the top of the flue gas desulfurization tank. A desulfurization mechanism is mounted in the flue gas desulfurization tank, and a waste heat recovery mechanism is arranged below the desulfurization mechanism; the waste heat recovery mechanism comprises a waste heat recovery bin arranged in the flue gas desulfurization tank, a water spraying pipe is arranged in the waste heat recovery bin, two arc-shaped pipes are arranged at the top of the water spraying pipe, a water receiving disc is arranged below the arc-shaped pipes, and a sliding groove is formed in the connecting position of the water receiving disc and the water spraying pipe. The water solution can fall into the waste heat recovery bin from the top in a spraying mode and can be in full contact with the annular flue in cooperation with the stirring device, and the waste heat recovery efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization, in particular to a flue gas desulfurization device with a waste heat recovery structure. Background Art

[0002] Flue gas desulfurization device is a device used to remove sulfur dioxide from flue gas produced by combustion, which is of great significance for reducing air pollution and protecting the environment.

[0003] The flue gas desulfurization device will generate a lot of heat energy in the process of treating flue gas. If this heat energy is not used, it will be directly discharged into the atmosphere, resulting in energy waste. Through waste heat recovery technology, this heat energy can be converted into energy in the form of electricity or hot water, realizing efficient energy utilization.

[0004] The existing public technical scheme, with announcement number CN218281250U, discloses a boiler flue gas desulfurization device, which transports the boiler flue gas through an annular air supply channel, and the water inlet pipe transports the aqueous solution to the central water supply channel. The aqueous solution in the central water supply channel absorbs the heat of the flue gas in the annular air supply channel, and can recycle the waste heat in the flue gas.

[0005] In response to the above problems, although the solution given in the existing patent can heat the aqueous solution, the boiler flue gas is directly transported through the annular air supply channel, and the aqueous solution is stationary in the water supply channel, which results in the aqueous solution not being able to fully contact with the flue gas, and the high temperature utilization efficiency of the flue gas is low. Summary of the invention

[0006] The purpose of the utility model is to provide a flue gas desulfurization device with a waste heat recovery structure, which can be sprayed from the top into the interior of the waste heat recovery bin, and is combined with a stirring device to allow the aqueous solution to fully contact the annular flue, thereby improving the waste heat recovery efficiency and solving the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flue gas desulfurization device with a waste heat recovery structure, comprising a flue gas desulfurization tank, a water outlet and a water inlet are distributed from top to bottom on the left side of the flue gas desulfurization tank, a smoke inlet pipe is arranged at the front end of the flue gas desulfurization tank, and a smoke exhaust pipe is installed on the top of the flue gas desulfurization tank, a desulfurization mechanism is installed inside the flue gas desulfurization tank, and a waste heat recovery mechanism is arranged below the desulfurization mechanism;

[0008] The waste heat recovery mechanism includes a waste heat recovery bin arranged inside the flue gas desulfurization tank, and a water spray pipe is arranged inside the waste heat recovery bin, and two groups of arc pipes are arranged on the top of the water spray pipe, a water receiving pan is arranged below the arc pipe, and a sliding groove is provided at the connection between the water receiving pan and the water spray pipe, a return spring is installed inside the sliding groove, a lifting screw is arranged below the water receiving pan, and a lifting sleeve is installed on the outside of the lifting screw through a screw nut, a rotating sleeve is arranged below the lifting sleeve, and a plurality of equidistant and evenly distributed stirring rods are installed around the rotating sleeve.

[0009] Preferably, the inner wall of the waste heat recovery bin is provided with an annular flue with a spiral structure, and the waste heat recovery bin is interconnected with the flue gas desulfurization tank through the annular flue.

[0010] Preferably, a baffle with an inverted V-shaped structure is fixed to the top of the waste heat recovery bin.

[0011] Preferably, connecting pipes are provided between the waste heat recovery bin and the water outlet and the water inlet.

[0012] Preferably, the lifting sleeve is provided with a limit rod via a bearing, and the limit rod is fixed on the water spray pipe.

[0013] Preferably, the rotating sleeve rod is sleeved with the lifting screw rod, and the rotating sleeve rod is rotated on the lifting screw rod through the lifting sleeve.

[0014] Preferably, the water inlet is communicated with the water spray pipe through a connecting pipe, and the water spray pipe is communicated with the arc pipe.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The arc-shaped pipe can spray water onto the water receiving tray in an arc shape. When the water receiving tray is full of water, the water can overflow from the surroundings of the water receiving tray, so that the water flows from top to bottom near the side of the annular flue, and the water is fully heated;

[0017] 2. By arranging a lifting screw on the water receiving tray, when the water receiving tray is pressed downward under the action of gravity, the lifting sleeve can be driven to rotate, thereby driving the stirring mechanism to rotate, so that the stirring rod rotates on both sides of the water spray pipe. Under the action of centrifugal force, the water fully contacts the annular flue, thereby improving the waste heat recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is the overall structural view of the utility model;

[0020] Figure 2 It is a schematic diagram of a half-section structure of the utility model;

[0021] Figure 3 For the utility model Figure 2 A magnified view of middle;

[0022] Figure 4 It is a structural schematic diagram of the lifting screw rod of the utility model.

[0023] Description of reference numerals:

[0024] 1. Flue gas desulfurization tank; 2. Water outlet; 3. Water inlet; 4. Smoke inlet pipe; 5. Smoke exhaust pipe; 6. Desulfurization mechanism; 7. Waste heat recovery mechanism; 701. Waste heat recovery bin; 702. Water spray pipe; 703. Water receiving tray; 704. Arc pipe; 705. Rotating sleeve rod; 706. Return spring; 707. Lifting screw rod; 708. Lifting sleeve; 709. Limit rod; 710. Stirring rod; 8. Annular flue; 9. Baffle. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides a technical solution:

[0027] See also Figures 1 to 4 A flue gas desulfurization device with a waste heat recovery structure includes a flue gas desulfurization tank 1, a water outlet 2 and a water inlet 3 are distributed from top to bottom on the left side of the flue gas desulfurization tank 1, a smoke inlet pipe 4 is arranged at the front end of the flue gas desulfurization tank 1, and a smoke exhaust pipe 5 is installed on the top of the flue gas desulfurization tank 1, a desulfurization mechanism 6 is installed inside the flue gas desulfurization tank 1, and a waste heat recovery mechanism 7 is arranged below the desulfurization mechanism 6;

[0028] The waste heat recovery mechanism 7 includes a waste heat recovery bin 701 arranged inside the flue gas desulfurization tank 1, and a water spray pipe 702 is arranged inside the waste heat recovery bin 701, and two groups of arc tubes 704 are arranged on the top of the water spray pipe 702, a water receiving pan 703 is arranged below the arc tube 704, and a sliding groove is provided at the connection between the water receiving pan 703 and the water spray pipe 702, and a reset spring 706 is installed inside the sliding groove, a lifting screw rod 707 is arranged below the water receiving pan 703, and a lifting sleeve 708 is installed on the outside of the lifting screw rod 707 through a screw nut, and a limit rod 709 is installed on the lifting sleeve 708 through a bearing, and the limit rod 709 is fixed on the water spray pipe 702, and a rotating sleeve rod 705 is arranged below the lifting sleeve rod 708, and a number of stirring rods 710 equidistantly and evenly distributed are installed around the rotating sleeve rod 705.

[0029] By adopting the above technical solution, the water receiving tray 703 is mounted on the outside of the water spray pipe 702 and slides up and down on the outside of the water spray pipe 702. The two ends of the reset spring 706 are respectively connected to the sliding grooves on the water receiving tray 703 and the water spray pipe 702. The sliding groove limits the movement of the water receiving tray 703. When the water in the water receiving tray 703 is full, the pressure on the reset spring 706 reaches the maximum value. After the force continues to increase, the reset spring 706 can be elastically deformed. As the water receiving tray 703 continues to receive water, the water flows outward. The return spring 706 generates a reverse force while squeezing inward, and pushes the water receiving tray 703 upward. The return spring 706 continuously expands and contracts, and the water in the water receiving tray 703 is shaken out. This cycle repeats over and over again. The water moves back and forth in the waste heat recovery bin 701 until the water in the waste heat recovery bin 701 reaches a maximum value and is discharged from the water outlet 2 after heating. The length of the stirring rod 710 needs to be smaller than the distance between the rotating sleeve rod 705 and the water spray pipe 702, so as to avoid hitting the water spray pipe 702 when the stirring rod 710 rotates.

[0030] Specifically, Figures 2 to 4 As shown, the inner wall of the waste heat recovery bin 701 is provided with a spiral annular flue 8, and the waste heat recovery bin 701 is interconnected with the flue gas desulfurization tank 1 through the annular flue 8, and a baffle 9 with an inverted V-shaped structure is fixed on the top of the waste heat recovery bin 701, and connecting pipes are provided between the waste heat recovery bin 701 and the water outlet 2 and the water inlet 3, the rotating sleeve 705 is sleeved with the lifting screw 707, and the rotating sleeve 705 is rotated on the lifting screw 707 through the lifting sleeve 708, the water inlet 3 is interconnected with the water spray pipe 702 through the connecting pipe, and the water spray pipe 702 is interconnected with the arc pipe 704.

[0031] By adopting the above technical solution, the length of the stirring rod 710 needs to be smaller than the distance between the rotating sleeve rod 705 and the annular flue 8 to avoid hitting the annular flue 8 when the stirring rod 710 rotates. The annular flue 8 spirals inside the waste heat recovery bin 701 and fits closely with the inner wall of the waste heat recovery bin 701. The smoke inlet pipe 4 is connected to the smoke exhaust pipe 5 through the annular flue 8. After water enters the water inlet 3, it enters the water spray pipe 702 through the connecting pipe and is sprayed outward from the arc pipe 704 at the top of the water spray pipe 702. Under the action of gravity, the water is sprayed on the water receiving tray 703 in an arc shape. As the water in the water receiving tray 703 increases and the weight increases, the reset spring 706 can be squeezed downward. At this time, the water receiving tray 703 presses the lifting screw rod 707 downward. Since the lifting sleeve 708 can only move in the limit rod 709 through the bearing, the lifting screw rod 7 07 Under the action of the screw nut, the lifting sleeve 708 can be driven to rotate on the lifting screw 707, that is, the stirring rod 710 can be driven to rotate by rotating the sleeve rod 705. The water heated by the flue gas in the annular flue 8 is discharged through the water outlet 2, and the flue gas enters the desulfurization mechanism 6 through the waste heat recovery bin 701 for desulfurization. A wet filter cloth containing a desulfurization treatment liquid can be arranged in the desulfurization mechanism 6 to treat the flue gas. The desulfurized flue gas is discharged outward through the exhaust pipe 5. Since the aqueous solution will generate water vapor during the heating process, condensed water will be formed after the water vapor is condensed. This part of the condensed water needs to be treated. The water vapor generated after heating reaches the top of the waste heat recovery bin 701, and condensed water droplets are generated after cooling. The condensed water droplets gather together and fall on the baffle 9 for collection. A pipe can be arranged on the baffle 9 to discharge the condensed water out of the waste heat recovery bin 701.

[0032] Working principle: By changing the flow direction of water, the water is sprayed from the top to the inside of the waste heat recovery bin 701, so that the aqueous solution can fully contact with the annular flue 8. At the same time, when the water receiving tray 703 moves up and down, the lifting screw 707 can drive the rotating sleeve rod 705 to rotate, so that the stirring rod 710 can rotate to stir the water in the waste heat recovery bin 701, further increase the contact between the aqueous solution and the annular flue 8, so that the aqueous solution can be quickly heated, and the waste heat recovery efficiency is improved.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A flue gas desulfurization device with a waste heat recovery structure, comprising a flue gas desulfurization tank (1), characterized in that: A water outlet (2) and a water inlet (3) are arranged on the left side of the flue gas desulfurization tank (1) from top to bottom, a smoke inlet pipe (4) is arranged at the front end of the flue gas desulfurization tank (1), and a smoke exhaust pipe (5) is installed on the top of the flue gas desulfurization tank (1), a desulfurization mechanism (6) is installed inside the flue gas desulfurization tank (1), and a waste heat recovery mechanism (7) is arranged below the desulfurization mechanism (6); The waste heat recovery mechanism (7) comprises a waste heat recovery bin (701) arranged inside the flue gas desulfurization tank (1), and a water spray pipe (702) is arranged inside the waste heat recovery bin (701), and two groups of arc-shaped pipes (704) are arranged on the top of the water spray pipe (702), a water receiving pan (703) is arranged below the arc-shaped pipe (704), and a sliding groove is provided at the connection between the water receiving pan (703) and the water spray pipe (702), a return spring (706) is installed inside the sliding groove, a lifting screw rod (707) is arranged below the water receiving pan (703), and a lifting sleeve (708) is installed on the outside of the lifting screw rod (707) through a screw nut, a rotating sleeve rod (705) is arranged below the lifting sleeve rod (708), and a plurality of stirring rods (710) evenly distributed at equal distances are installed around the rotating sleeve rod (705).

2. A flue gas desulfurization device with a waste heat recovery structure according to claim 1, characterized in that: The inner wall of the waste heat recovery bin (701) is provided with an annular flue (8) with a spiral structure, and the waste heat recovery bin (701) is connected to the flue gas desulfurization tank (1) through the annular flue (8).

3. A flue gas desulfurization device with a waste heat recovery structure according to claim 1, characterized in that: A baffle (9) in an inverted V-shaped structure is fixed on the top of the waste heat recovery bin (701).

4. A flue gas desulfurization device with a waste heat recovery structure according to claim 1, characterized in that: Connecting pipes are provided between the waste heat recovery bin (701) and the water outlet (2) and the water inlet (3).

5. The flue gas desulfurization device with a waste heat recovery structure according to claim 1, characterized in that: The lifting sleeve (708) is mounted with a limit rod (709) via a bearing, and the limit rod (709) is fixed on the water spray pipe (702).

6. A flue gas desulfurization device with a waste heat recovery structure according to claim 1, characterized in that: The rotating sleeve rod (705) is sleeved with the lifting screw rod (707), and the rotating sleeve rod (705) is rotated on the lifting screw rod (707) through the lifting sleeve (708).

7. A flue gas desulfurization device with a waste heat recovery structure according to claim 4, characterized in that: The water inlet (3) is connected to the water spray pipe (702) through a connecting pipe, and the water spray pipe (702) is connected to the arc pipe (704).

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