Desulfurized fly ash pulping system
By designing a desulfurization ash slurrying system and utilizing pneumatic conveying and slurry tank mixing technology, we have achieved continuous slurrying and quality control of semi-dry desulfurization ash, solved the problem of intermediate back-up transportation and environmental pollution, and provided a new method for recycling desulfurization ash. Reuse pathways.
Patent Information
- Application Number
- CN202420954919.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-06
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-06
AI Technical Summary
Semi-dry desulfurization ash is difficult to be stable in the fields of building materials, cement, etc., and there is an intermediate inverted transportation problem in the existing pulping process, which increases the difficulty of scheduling and human resources costs, and cannot achieve continuous operation.
A desulfurization ash slurrying system is designed, including a slurry box, an ash inlet pipe and a pneumatic conveying device. The semi-dry desulfurization ash is directly transported to the slurry box through pneumatic conveying, mixed with the liquid to form a slurry, and passed through the mixer and density Designed to achieve continuous pulping and quality control.
It realizes the continuous pulping process of semi-dry desulfurization ash, solves the problem of environmental dust pollution that may be caused by pneumatic ash conveying, ensures the stable and continuous reuse of desulfurization ash in the wet desulfurization system, and provides a new method for its recycling and reuse. way.
Smart Images
Figure CN222368784U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of desulfurization ash disposal, and in particular relates to a desulfurization ash pulping system. Background Art
[0002] Semi-dry desulfurization is one of the commonly used flue gas desulfurization technologies. The difficulty of resource recycling of semi-dry desulfurization ash has become one of the main factors restricting the application of semi-dry desulfurization technology.
[0003] The main components of semi-dry desulfurization ash are calcium sulfite, calcium sulfate, calcium carbonate, calcium hydroxide, and heavy metal elements and chlorides. The proportions of these components are not fixed, and they vary greatly in the desulfurization ash of different projects, and there are also differences in the same desulfurization device due to changes in operating conditions. The instability of these substances and their contents makes it difficult for semi-dry desulfurization ash to be stably applied in building materials, cement, etc. Therefore, people have been seeking new ways to reuse desulfurization ash. Through the study of the physical and chemical properties and desulfurization characteristics of semi-dry desulfurization ash, a small number of projects have begun to apply desulfurization ash pulping to wet desulfurization systems as a desulfurization agent for wet desulfurization, but the pulping process basically uses tank trucks as the intermediate reverse transportation method, which increases the scheduling difficulty and human resource costs within the plant, and cannot achieve the goal of continuous operation. Utility Model Content
[0004] The utility model aims to provide a device which can directly connect the ash storage and pulping, remove the intermediate transportation process, and realize continuous production of wet desulfurization agent slurry from semi-dry desulfurization ash.
[0005] To this end, the utility model provides a desulfurization ash slurrying system, including a slurry box, an ash inlet pipe and a pneumatic conveying device; one end of the ash inlet pipe is connected to the discharge port of the pneumatic conveying device, and the other end extends into the slurry box; a gas outlet is opened at the top of the slurry box; and an exhaust pipe is connected to the gas outlet.
[0006] Specifically, the exhaust pipe is connected to a spray device for spraying liquid into the exhaust pipe.
[0007] Specifically, the slurry box is provided with a slurry outlet; a slurry delivery pump is provided at the slurry outlet.
[0008] Specifically, the above-mentioned desulfurization ash slurry making system also includes an overflow pipe; one end of the overflow pipe is connected to the slurry tank.
[0009] Specifically, a liquid seal is provided at one end of the overflow pipe away from the slurry tank.
[0010] Specifically, the slurry box is provided with a densitometer for detecting the density of the liquid in the slurry box.
[0011] Specifically, the above-mentioned desulfurization ash slurrying system also includes an ash bin; the ash bin; the discharge port of the ash bin is connected to the feed port of the pneumatic conveying device 3.
[0012] Specifically, the slurry box is provided with a stirrer for stirring the desulfurization ash slurry.
[0013] Specifically, a sewage pipe is provided at the bottom of the slurry box.
[0014] Specifically, a liquid inlet is provided at the top of the slurry box; the liquid inlet is connected to a water inlet pipe.
[0015] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0016] The desulfurization ash slurry making system provided by the utility model can continuously make semi-dry desulfurization ash into wet desulfurization agent slurry, realizes the continuous slurry making process of pneumatic conveying of semi-dry desulfurization ash, and solves the problem of environmental dust pollution that may be caused by pneumatic ash conveying, so that the semi-dry desulfurization ash can be stably and continuously reused in the wet desulfurization system, providing a new feasible way for the recycling and reuse of semi-dry desulfurization ash.
[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of a desulfurization ash pulping system provided by the utility model.
[0019] Explanation of the accompanying drawings: 1. Slurry tank; 101. Liquid inlet; 102. Desulfurization ash inlet; 103. Gas outlet; 104. Slurry outlet; 2. Ash inlet pipe; 3. Pneumatic conveying device; 4. Agitator; 5. Exhaust pipe; 501. Spraying device; 6. Overflow pipe; 7. Liquid seal; 8. Drain pipe; 9. Water inlet pipe; 901. Water inlet valve; 10. Density meter; 11. Slurry conveying pump. DETAILED DESCRIPTION
[0020] 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 of 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.
[0021] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.
[0022] Reference Figure 1 The utility model provides a desulfurization ash slurrying system, including a slurry box 1, an ash inlet pipe 2 and a pneumatic conveying device 3; one end of the ash inlet pipe 2 is connected to the discharge port of the pneumatic conveying device 3, and the other end extends into the slurry box 1; a gas outlet 103 is provided at the top of the slurry box 1; an exhaust pipe 5 is connected to the gas outlet 103. In actual use, water is injected into the slurry box 1, and the ash inlet pipe 2 penetrates below the liquid level of the slurry box 1. The feed port of the pneumatic conveying device 3 is connected to the discharge port of the ash bin, and the semi-dry desulfurization ash at the bottom of the ash bin is transported to the slurry box 1 through the pneumatic conveying device 3 and the ash inlet pipe 2 by the force of compressed air, and mixed with the liquid to form desulfurization ash slurry. The gas entering the slurry with the desulfurization ash passes through the slurry layer from bottom to top, and the desulfurization ash solid particles in the gas are forcibly washed by the slurry layer, and then enter the ambient atmosphere from the gas outlet 103 through the exhaust pipe 5.
[0023] In order to avoid the environmental dust pollution problem that may be caused by pneumatic ash conveying, the exhaust pipe 5 is connected to a spray device 501 for spraying liquid into the exhaust pipe 5, and the gas discharged from the exhaust pipe 5 is sprayed with water mist to wash the entrained dust again.
[0024] Specifically, a slurry outlet 104 is provided on the slurry box 1, and a slurry delivery pump 11 is provided at the slurry outlet 104. The mixed desulfurized ash slurry is delivered to the next process for utilization through the slurry delivery pump 11.
[0025] Furthermore, the desulfurization ash slurry making system also includes an overflow pipe 6; one end of the overflow pipe 6 is connected to the slurry tank 1, and the connection point is higher than the liquid level of the slurry tank 1, so that the gas washed out of the desulfurization ash solid particles is discharged into the environment through the overflow pipe 6.
[0026] Preferably, a liquid seal 7 is provided at one end of the overflow pipe 6 away from the slurry tank 1. The gas discharged from the overflow pipe 6 passes through the liquid seal 7 to wash the dust again to reduce pollution.
[0027] In a detailed embodiment, a densitometer 10, preferably a differential pressure densitometer, is provided on the slurry tank 1 for detecting the density of the liquid in the slurry tank 1. The density of the desulfurized slurry is monitored by the densitometer 10, and the ash and water intake is adjusted as needed.
[0028] Furthermore, a stirrer 4 for stirring the desulfurized ash slurry is provided in the slurry box 1. When the desulfurized ash is introduced, the stirrer 4 is started to stir the desulfurized ash and process water evenly and suspend the solid particles.
[0029] Optionally, a sewage pipe 8 is provided at the bottom of the slurry tank 1. When the desulfurized ash pulping system has been running for a period of time and the slurry tank 1 needs to be cleaned, the sewage generated by the cleaning is discharged through the sewage pipe 8.
[0030] In an optimized embodiment, a liquid inlet 101 is provided on the top of the slurry tank 1; the liquid inlet 101 is connected to the water inlet pipe 9, and process water is injected into the slurry tank 1 through the liquid inlet 101. A water inlet valve 901 can be provided on the water inlet pipe 9 to adjust the water volume.
[0031] Embodiment 1:
[0032] This embodiment provides a desulfurization ash slurry making system, including a slurry box 1, an ash inlet pipe 2, a pneumatic conveying device 3, an overflow pipe 6, an exhaust pipe 5 and a sewage pipe 8.
[0033] The top of the slurry tank 1 is respectively provided with a liquid inlet 101, a desulfurization ash inlet 102 and a gas outlet 103, an overflow outlet is opened at the upper end of the side wall, and a sewage outlet and a slurry outlet 104 are respectively opened at the lower end of the side wall; the slurry tank 1 is provided with a differential pressure density meter for detecting the density of the liquid in the slurry tank 1; an agitator 4 is provided in the slurry tank 1; the liquid inlet 101 is connected to the water inlet pipe 9 through a pipeline, and a water inlet valve 901 is provided on the pipeline; a slurry delivery pump 11 is provided at the slurry outlet 104.
[0034] One end of the ash inlet pipe 2 is connected to the desulfurized ash inlet 102 , and the other end extends into the slurry tank 1 .
[0035] The feed port of the pneumatic conveying device 3 is connected to the ash bin, and the discharge port is communicated with the ash feeding pipe 2.
[0036] One end of the overflow pipe 6 is connected to the overflow outlet of the slurry box 1, and the other end is provided with a liquid seal 7.
[0037] The exhaust pipe 5 is communicated with the gas outlet 103 of the slurry box 1 , and a spray device 501 is provided on the exhaust pipe 5 .
[0038] One end of the sewage pipe 8 is connected to the sewage outlet, and the other end is connected to the overflow pipe 6, and a liquid seal 7 device is shared.
[0039] In actual use, the water inlet pipe 9 is connected to the external water supply device, the water inlet valve 901 is started, and process water is injected into the slurry box 1 according to process requirements to ensure that the ash inlet pipe 2 extends below the liquid level. The pneumatic conveying device 3 is started, and the desulfurized ash is transported to the slurry box 1 by compressed air. At the same time, the agitator 4 is turned on to mix the desulfurized ash and process water evenly and suspend the solid particles to form a desulfurized ash slurry. The slurry density is monitored by a differential pressure densitometer, and the slurry density is adjusted by the water inlet valve 901. The prepared slurry enters the slurry delivery pump 11 through the slurry outlet 104 and is sent to the subsequent wet desulfurization tower. The gas entering the slurry with the desulfurized ash passes through the slurry layer from bottom to top, and the desulfurized ash solid particles in the gas are forcibly washed by the slurry layer, and then discharged from the overflow pipe 6 or the exhaust pipe 5. The gas discharged from the overflow pipe 6 passes through the liquid seal 7 to wash the dust again, and the gas discharged from the exhaust pipe 5 passes through the spray device 501 to wash the dust again.
[0040] To sum up, the desulfurization ash slurrying system provided by the utility model can continuously produce semi-dry desulfurization ash into wet desulfurization agent slurry, realizes the continuous slurrying process of semi-dry desulfurization ash by pneumatic conveying, and solves the problem of environmental dust pollution caused by pneumatic ash conveying, so that the semi-dry desulfurization ash can be stably and continuously reused in the wet desulfurization system, providing a new feasible way for the recycling and reuse of semi-dry desulfurization ash.
[0041] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are identical or similar to the present invention fall within the protection scope of the present invention.
Claims
1. A desulfurization ash pulping system, characterized in that: It comprises a slurry box (1), an ash inlet pipe (2) and a pneumatic conveying device (3); one end of the ash inlet pipe (2) is connected to the discharge port of the pneumatic conveying device (3), and the other end extends into the slurry box (1); a gas outlet (103) is provided at the top of the slurry box (1); and an exhaust pipe (5) is connected to the gas outlet (103).
2. The desulfurization ash pulping system according to claim 1, characterized in that: The exhaust pipe (5) is connected to a spray device (501) for spraying liquid into the exhaust pipe (5).
3. The desulfurization ash pulping system according to claim 1, characterized in that: The slurry box (1) is provided with a slurry outlet (104); a slurry delivery pump (11) is provided at the slurry outlet (104).
4. The desulfurization ash pulping system according to claim 1, characterized in that: It also includes an overflow pipe (6); one end of the overflow pipe (6) is connected to the slurry tank (1).
5. The desulfurization ash pulping system according to claim 4, characterized in that: A liquid seal (7) is provided at one end of the overflow pipe (6) away from the slurry tank (1).
6. The desulfurization ash pulping system according to claim 1, characterized in that: The slurry box (1) is provided with a densitometer (10) for detecting the density of the liquid in the slurry box (1).
7. The desulfurization ash pulping system according to claim 6, characterized in that: It also comprises an ash bin; the discharge port of the ash bin is connected to the feed port of the pneumatic conveying device (3).
8. The desulfurization ash pulping system according to claim 1, characterized in that: The slurry tank (1) is provided with a stirrer (4) for stirring the desulfurized ash slurry.
9. The desulfurization ash pulping system according to claim 1, characterized in that: A sewage discharge pipe (8) is provided at the bottom of the slurry tank (1).
10. The desulfurization ash pulping system according to claim 1, characterized in that: The top of the slurry box (1) is provided with a liquid inlet (101); the liquid inlet (101) is connected to a water inlet pipe (9).