Slurry mineral admixture production equipment

Abstract

The utility model relates to the technical field of admixture preparation devices, in particular to slurry mineral admixture production equipment which comprises an emission collecting and processing unit, a flue gas desulfurization unit and a mineral admixture production unit which are sequentially connected in series, a desulfurizer slurry production unit is connected between the emission collection and treatment unit and the mineral admixture production unit, and the emission collection and treatment unit is in communication connection with the mineral admixture production unit; the desulfurizer slurry production unit is connected with the flue gas desulfurization unit; according to the slurry mineral admixture production equipment, available raw materials and emissions of a circulating fluidized bed power plant can be utilized, fly ash, furnace slag and desulfurization products are used as main raw materials, and a series of problems that emissions of a traditional circulating fluidized bed power plant need to be treated independently and the like are solved; solid waste emission of a power plant is reduced, the utilization rate of emissions of the circulating fluidized bed boiler power plant is increased, and a mineral admixture can be prepared.

Description

Technical Field

[0001] This utility model relates to the technical field of admixture preparation device, specifically to a slurry mineral admixture production equipment. Background Technology

[0002] Circulating fluidized bed (CFB) boilers are a clean coal-fired power generation technology. However, traditional CFB boiler ash and slag have high CaO and SO3 content, which leads to stability issues and makes them unusable as resources. As a result, many power plants have abandoned in-furnace desulfurization and adopted flue gas desulfurization processes. The emissions include low-sulfur, low-calcium CFB boiler fly ash, slag, and desulfurization gypsum, resulting in additional desulfurization gypsum emissions compared to traditional CFB power plants.

[0003] However, national standards stipulate that such ash cannot be used as fly ash raw material, and the addition of desulfurized gypsum increases the difficulty of emission treatment and resource utilization. However, limestone is a commonly used mineral admixture in the cement or concrete industry, and low-sulfur and low-calcium aluminosilicate circulating fluidized bed boiler ash has a good synergistic hydration effect with limestone and desulfurized gypsum. By reasonably controlling the content of key components such as calcium and sulfur, mineral admixtures can be produced.

[0004] Therefore, it is necessary to consider using emissions to produce mineral admixtures in order to improve the utilization rate of emissions from circulating fluidized bed boiler power plants; in this regard, we propose a slurry mineral admixture production equipment. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings mentioned in the background art and provide a production equipment for slurry mineral admixtures.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A slurry mineral admixture production equipment includes an emission collection and treatment unit, a flue gas desulfurization unit, and a mineral admixture production unit connected in series.

[0008] A desulfurizing agent slurry production unit is connected between the emission collection and treatment unit and the mineral admixture production unit, and a conductive connection is provided between the emission collection and treatment unit and the mineral admixture production unit.

[0009] The desulfurizing agent slurry production unit is connected to the flue gas desulfurization unit.

[0010] Preferably, the emission collection and treatment unit includes a dust collector, a slag cooler, and a circulating cooling water tank connected to the circulating cooling water pump for respectively collecting dust-laden flue gas, bottom ash, and cooling water discharged from the circulating fluidized bed boiler combustion power generation system.

[0011] The dust collector is connected to a fly ash silo for collecting fly ash.

[0012] The slag cooler is electrically connected to a slag silo for receiving and cooling slag.

[0013] Preferably, the desulfurizing agent slurry production unit includes a metering conveyor and a metering water pump respectively connected to the slag silo and the circulating cooling water tank;

[0014] It also includes a limestone silo for conveying limestone to the metering conveyor, a wet ball mill connected to the metering conveyor and the metering water pump, and a first desulfurization slurry silo connected to the wet ball mill via a first desulfurization slurry pump.

[0015] Preferably, the flue gas desulfurization unit includes an induced draft fan installed on the dust collector for discharging dust-collected flue gas, and a flue gas desulfurization tower connected to the induced draft fan;

[0016] The flue gas desulfurization tower is connected to a chimney for collecting desulfurization tail gas via a desulfurization tail gas exhaust fan.

[0017] The flue gas desulfurization tower is connected to the first desulfurization slurry tank via a second desulfurization slurry pump.

[0018] Preferably, the flue gas desulfurization tower is equipped with an oxidation fan and a second desulfurization slurry tank connected via a third desulfurization slurry pump.

[0019] Preferably, a flue gas damper and a tail gas monitor are installed between the flue gas desulfurization tower and the induced draft fan and the desulfurization tail gas exhaust fan, respectively;

[0020] A material level monitor is installed inside the flue gas desulfurization tower.

[0021] Preferably, the mineral admixture production unit includes a metering screw feeder connected to the fly ash silo, and a metering slurry pump connected to the first desulfurization slurry silo and the second desulfurization slurry silo respectively for receiving slurry;

[0022] The metering screw feeder and the metering slurry pump are respectively connected and installed on the mixing and dispersing machine.

[0023] Preferably, the mixing and dispersing machine is connected to an additive storage tank via an additive metering pump, and the mixing and dispersing machine is connected to a finished product slurry silo via a finished product slurry pump.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] This slurry mineral admixture production equipment can utilize available raw materials and emissions from circulating fluidized bed power plants, using fly ash, slag, and desulfurization products as the main raw materials. It overcomes a series of problems, such as the need for separate treatment and disposal of emissions from traditional circulating fluidized bed power plants. It is conducive to reducing solid waste emissions from power plants, improving the utilization rate of emissions from circulating fluidized bed boiler power plants, and preparing mineral admixtures. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a flowchart of the present invention.

[0029] The meanings of the labels in the diagram are as follows:

[0030] 100. Emissions collection and treatment unit; 200. Desulfurizing agent slurry production unit; 300. Flue gas desulfurization unit; 400. Mineral admixture production unit.

[0031] 101. Dust collector; 102. Fly ash silo; 103. Slag cooler; 104. Slag silo; 105. Circulating cooling water pump; 106. Circulating cooling water tank;

[0032] 201. Limestone silo; 202. Metering conveyor; 203. Metering water pump; 204. Wet ball mill; 205. First desulfurization slurry pump; 206. First desulfurization slurry silo;

[0033] 301. Exhaust fan; 302. Second desulfurization slurry pump; 303. Flue gas damper; 304. Flue gas desulfurization tower; 305. Material level monitor; 306. Oxidation fan; 307. Third desulfurization slurry pump; 308. Second desulfurization slurry silo; 309. Tail gas monitor; 310. Desulfurization tail gas exhaust fan; 311. Chimney;

[0034] 401. Metering screw feeder; 402. Mixing and dispersing machine; 403. Metering slurry pump; 404. Admixture storage tank; 405. Admixture metering pump; 406. Finished product slurry pump; 407. Finished product slurry silo. Detailed Implementation

[0035] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] Please see Figure 1-2 The present invention will describe the above technical solution in detail through the following embodiments:

[0037] A type of equipment for producing slurry mineral admixtures, such as Figure 2 As shown, it includes an emission collection and treatment unit 100, a flue gas desulfurization unit 300, and a mineral admixture production unit 400 connected in series; and a desulfurizing agent slurry production unit 200 is connected between the emission collection and treatment unit 100 and the mineral admixture production unit 400, and the desulfurizing agent slurry production unit 200 is connected to the flue gas desulfurization unit 300.

[0038] Specifically, such as Figure 1 As shown in the structure, the emission collection and treatment unit 100 in this embodiment includes a dust collector 101, a slag cooler 103 for collecting dust-laden flue gas, bottom ash, and cooling water discharged from the circulating fluidized bed boiler combustion power generation system, and a circulating cooling water tank 106 connected to a circulating cooling water pump 105; a fly ash silo 102 is connected to the dust collector 101, and a slag silo 104 is connected to the slag cooler 103.

[0039] like Figure 1 As shown in the structure, the desulfurizing agent slurry production unit 200 in this embodiment includes a metering conveyor 202 and a metering water pump 203 connected to the slag silo 104 and the circulating cooling water tank 106, respectively, and a limestone silo 201 for holding limestone. Slag and limestone are conveyed to the metering conveyor 202 through the limestone silo 201 and the slag silo 104. The material is quantitatively conveyed into the wet ball mill 204 through the metering conveyor 202 and the metering water pump 203. The wet ball mill 204 is connected to the first desulfurizing slurry silo 206 through the first desulfurizing slurry pump 205. In this embodiment, wet co-grinding is used to prepare a desulfurizing agent slurry with a solid phase concentration of 30%, which can be sent to the first desulfurizing slurry silo 206 for storage via the first desulfurizing slurry pump 205.

[0040] In this embodiment, SO2 in the flue gas can undergo a desulfurization reaction with the desulfurizing agent slurry sent into the flue gas desulfurization tower 304 by the second desulfurization slurry pump 302 to generate calcium sulfite. The desulfurization tail gas will be discharged into the chimney 311 through the desulfurization tail gas exhaust fan 310, and the desulfurization tail gas exhaust fan 310 is provided between them. In this embodiment, a flue gas damper 303 and a tail gas monitor 309 are respectively installed between the flue gas desulfurization tower 304 and the induced draft fan 301 and the desulfurization tail gas exhaust fan 310. A material level monitor 305 is installed inside the flue gas desulfurization tower 304.

[0041] Specifically, the flue gas desulfurization unit 300 includes an induced draft fan 301 installed on the dust collector 101 for discharging dust-collected flue gas, and the flue gas desulfurization tower 304 is connected to the induced draft fan 301. In this embodiment, an oxidation fan 306 is installed on the flue gas desulfurization tower 304, and a second desulfurization slurry tank 308 is connected to it through a third desulfurization slurry pump 307.

[0042] Furthermore, the mineral admixture production unit 400 is connected to the fly ash silo 102 via a metering screw feeder 401. The first desulfurization slurry silo 206 and the second desulfurization slurry silo 308 are respectively installed on the metering slurry pump 403. The metering slurry pump 403 is used to convey the mixture to the mixing and dispersing machine 402. The mixing and dispersing machine 402 is connected to the admixture storage tank 404 via the admixture metering pump 405, and is also connected to the finished product slurry silo 407 via the finished product slurry pump 406.

[0043] The dust-removed flue gas discharged from the emission collection and treatment unit 100 is sent to the flue gas desulfurization unit 300 by the induced draft fan 301. An oxidation fan 306 is installed on the flue gas desulfurization tower 304. The calcium sulfite generated by the desulfurization reaction comes into contact with the oxygen-enriched air sent by the oxidation fan 306 and is oxidized to gypsum dihydrate to form a desulfurization slurry. The desulfurization slurry is sent to the second desulfurization slurry silo 308 for storage by the third desulfurization slurry pump 307. The fly ash and desulfurization slurry are mixed and dispersed in the mixing and dispersing machine 402. Finally, the slurry is transported to the finished slurry silo 407 by the finished slurry pump 406, thus completing the production process of the slurry mineral admixture.

[0044] The working principle of the slurry mineral admixture production equipment in this embodiment is as follows: the dust removal flue gas discharged from the emission collection and treatment unit 100 is sent to the flue gas desulfurization unit 300 by the induced draft fan 301; the collected fly ash is directly stored in the fly ash silo 102; the slag is cooled by the slag cooler 103 and then stored in the slag silo 104; the cooling water is pumped by the circulating cooling water pump 105 and then stored in the circulating cooling water tank 106. In this embodiment, the average particle size of the fly ash is set to 50μm and the particle size of the slag is <2mm. The desulfurizing agent slurry production unit 200 is connected to the slag silo 104 and the circulating cooling water tank 106 via the metering conveyor 202, the metering water pump 203, and the circulating cooling water tank 106. The limestone in the limestone silo 201, the slag in the slag silo 104, and the circulating cooling water in the circulating cooling water tank 106 are respectively fed into the wet ball mill 204 via the metering conveyor 202 and the metering water pump 203 for wet grinding. The desulfurizing agent slurry with a solid phase concentration of 30% is sent to the first desulfurizing slurry silo 206 for storage via the first desulfurizing slurry pump 205. In this embodiment, the weight ratio of limestone to slag is set to 7:3, the solid phase concentration of the desulfurizing agent slurry is 30%, all particles pass through a 75μm sieve and the residue on a 45μm sieve is <12%. The dust removal flue gas discharged from the emission collection and treatment unit 100 is passed through the induced draft fan 3. 01. The SO2 in the flue gas enters the flue gas desulfurization tower 304. It reacts with the desulfurizing agent slurry pumped into the tower 304 via the second desulfurization slurry pump 302 to produce calcium sulfite. The qualified desulfurized tail gas is discharged through the desulfurization tail gas exhaust fan 310 into the chimney 311. The calcium sulfite produced by the desulfurization reaction is oxidized by the oxygen-enriched air supplied by the oxidation fan 306 to form gypsum dihydrate, forming a desulfurization slurry. The desulfurization slurry is then pumped into the second desulfurization slurry storage tank 308 via the third desulfurization slurry pump 307. The flue gas desulfurization tower 304, through the second desulfurization slurry pump 302, reacts with the first desulfurization agent slurry in the desulfurizing agent slurry production unit 200. The slurry storage 206 is connected; the flue gas desulfurization tower 304 is connected to the induced draft fan 301 and the desulfurization tail gas exhaust fan 310 through the flue gas damper 303 and the tail gas monitor 309 respectively. The flue gas desulfurization tower 304 is also equipped with a material level monitor 305 to monitor the material level of the desulfurizing agent slurry; the mineral admixture production unit 400 is connected to the fly ash storage 102 through the metering screw feeder 401, and is connected to the first desulfurization slurry storage 206 and the second desulfurization slurry storage 308 through the metering slurry pump 403 respectively; the materials are mixed and dispersed in the mixing and dispersing machine 402, and the slurry that meets the requirements is transported to the finished slurry storage 407 through the finished slurry pump 406.

[0045] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0046] Furthermore, if the embodiments of this utility model involve descriptions such as "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model.

Claims

1. A production equipment for slurry mineral admixtures, characterized in that: It includes an emissions collection and treatment unit (100), a flue gas desulfurization unit (300), and a mineral admixture production unit (400) connected in series in sequence; A desulfurizing agent slurry production unit (200) is connected between the emission collection and treatment unit (100) and the mineral admixture production unit (400), and a conductive connection is provided between the emission collection and treatment unit (100) and the mineral admixture production unit (400). The desulfurizing agent slurry production unit (200) is connected to the flue gas desulfurization unit (300).

2. The slurry mineral admixture production equipment as described in claim 1, characterized in that: The emission collection and treatment unit (100) includes a dust collector (101), a slag cooler (103) for collecting dust-laden flue gas, bottom ash and cooling water discharged from the circulating fluidized bed boiler combustion power generation system, and a circulating cooling water tank (106) connected by a circulating cooling water pump (105). The dust collector (101) is conductively connected to a fly ash silo (102) for collecting fly ash; The slag cooler (103) is electrically connected to a slag silo (104) for receiving cooled slag.

3. The slurry mineral admixture production equipment as described in claim 2, characterized in that: The desulfurizing agent slurry production unit (200) includes a metering conveyor (202) and a metering water pump (203) respectively connected to the slag storage (104) and the circulating cooling water tank (106); It also includes a limestone silo (201) for conveying limestone to the metering conveyor (202), a wet ball mill (204) connected to the metering conveyor (202) and the metering water pump (203), and the wet ball mill (204) is connected to a first desulfurization slurry silo (206) via a first desulfurization slurry pump (205).

4. The slurry mineral admixture production equipment as described in claim 3, characterized in that: The flue gas desulfurization unit (300) includes an induced draft fan (301) installed on the dust collector (101) for discharging dust-collected flue gas, and a flue gas desulfurization tower (304) connected to the induced draft fan (301); The flue gas desulfurization tower (304) is connected to a chimney (311) for collecting desulfurization tail gas via a desulfurization tail gas exhaust fan (310); The flue gas desulfurization tower (304) is connected to the first desulfurization slurry tank (206) via the second desulfurization slurry pump (302).

5. The slurry mineral admixture production equipment as described in claim 4, characterized in that: The flue gas desulfurization tower (304) is equipped with an oxidation fan (306) and a second desulfurization slurry tank (308) connected by a third desulfurization slurry pump (307).

6. The slurry mineral admixture production equipment as described in claim 5, characterized in that: A flue gas damper (303) and a tail gas monitor (309) are respectively installed between the flue gas desulfurization tower (304), the induced draft fan (301), and the desulfurization tail gas exhaust fan (310); A material level monitor (305) is installed inside the flue gas desulfurization tower (304).

7. The slurry mineral admixture production equipment as described in claim 6, characterized in that: The mineral admixture production unit (400) includes a metering screw feeder (401) connected to the fly ash silo (102), and a metering slurry pump (403) connected to the first desulfurization slurry silo (206) and the second desulfurization slurry silo (308) respectively for receiving slurry. The metering screw feeder (401) and the metering slurry pump (403) are respectively connected and installed on the mixing and dispersing machine (402).

8. The slurry mineral admixture production equipment as described in claim 7, characterized in that: The mixing and dispersing machine (402) is connected to an admixture storage tank (404) via an admixture metering pump (405), and the mixing and dispersing machine (402) is connected to a finished product slurry silo (407) via a finished product slurry pump (406).

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