CN216909834U

CN216909834U - Device for preparing desulfurizer by using carbide slag

Info

Publication number: CN216909834U
Application number: CN202220365777.8U
Authority: CN
Inventors: 王军涛; 刘继璇; 张语晴; 付月; 陈俞安
Original assignee: Guoneng Longyuan Environmental Protection Co Ltd
Current assignee: Guoneng Longyuan Environmental Protection Co Ltd
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2022-07-08
Anticipated expiration: 2032-02-23

Abstract

The utility model discloses a device for preparing a desulfurizer by carbide slag, which comprises a feeding system, a processing system and a finished product slurry tank, wherein the carbide slag forms desulfurization slurry through the feeding system, the processing system and the finished product slurry tank in sequence; the feeding system comprises a storage bin, a batching hopper, a discharging belt and a conveying belt; be equipped with the carbide slag in the feed bin, the carbide slag gets into processing system through batching fill, unloading belt and conveyor belt in proper order, the unloading belt is established in batching fill below, conveyor belt establishes in unloading belt below, processing system establishes at conveyor belt end. The utility model processes the carbide slag to ensure that the carbide slag is fully slurried to form the desulfurization reducing agent, and the multistage filtration is arranged to reduce impurities in the slurry, thereby reducing the abrasion to pipelines and equipment of a desulfurization system, having better slurry processing effect, and the pulping equipment is compatible with the existing desulfurization system, thereby effectively reducing the operation cost.

Description

Device for preparing desulfurizer by using carbide slag

Technical Field

The utility model relates to the technical field of flue gas treatment, in particular to a device for preparing a desulfurizer by using carbide slag.

Background

The prior limestone-gypsum wet desulphurization process is widely applied to domestic coal-fired units due to mature technology, high desulphurization efficiency and stable operation. However, limestone is expensive and large in consumption, which not only increases the operation cost of the coal-fired unit, but also causes the operation pressure of the power plant. Therefore, it is important to find an economical, stable and highly alternative desulfurization reducing agent.

The carbide slag has the required characteristics and can be used as a reducing agent to replace limestone for desulfurization. From the chemical characteristics, the main component of the carbide slag is Ca (OH)2, which belongs to medium and strong alkali, the solubility and the electrolysis degree are far greater than those of CaCO3 in limestone, the neutralization speed is high, the reaction is thorough, and the carbide slag has the capability of completely absorbing SO 2. From the economic characteristics, the carbide slag is a chlor-alkali chemical byproduct, belongs to II-class general industrial solid wastes, has large yield, large occupied area and large pollution, usually needs to spend a large amount of treatment cost, and the application of the carbide slag for desulfurization is equivalent to the waste treatment by waste, thereby being economic and environment-friendly. Finally, from the aspect of environmental protection, the carbide slag does not generate CO2 emission, and the environmental benefit of CO2 emission reduction can be achieved.

However, the carbide slag is a byproduct in the production process, the quality of the carbide slag is difficult to control, the carbide slag has the characteristics of high viscosity, poor fluidity and easy blockage and scaling, the slurry contains a large amount of insoluble impurities such as carbon particles and SiO2, equipment and pipelines are greatly abraded when a system runs, and meanwhile, the carbide slag desulfurization also has the problem that gypsum slurry is difficult to oxidize and dewater, mainly because the pH value of the slurry in an absorption tower is relatively high, the content of calcium sulfite in the slurry in the absorption tower is high and the calcium sulfite is difficult to dissolve and oxidize; the carbide slag slurry has higher Cl < - > concentration and COD value, which is not beneficial to the oxidation of the slurry of the absorption tower; in addition, a small amount of black sticky substances exist in the carbide slag slurry, and are easy to adsorb on the surface of the gypsum to block the hydrophobic pore channels of the gypsum. These problems all seriously affect the stability of the system. The utility model provides a device for preparing a desulfurizer by carbide slag, which solves the problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a device for preparing a desulfurizing agent by using carbide slag, which is used for realizing the treatment of the carbide slag and stably and efficiently carrying out the operation of preparing the desulfurizing reducing agent by using the carbide slag with low cost.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a device for preparing a desulfurizer by using carbide slag comprises a feeding system, a processing system and a finished product slurry tank, wherein the carbide slag forms desulfurization slurry through the feeding system, the processing system and the finished product slurry tank in sequence;

the feeding system comprises a storage bin, a batching hopper, a discharging belt and a conveying belt; the feed bin is internally provided with carbide slag, the carbide slag sequentially passes through the batching hopper, the blanking belt and the conveying belt to enter the treatment system, the blanking belt is arranged below the batching hopper, the conveying belt is arranged below the blanking belt, and the treatment system is arranged at the tail end of the conveying belt;

the treatment system comprises a digestion tank, a filtering slag extractor and a slurry melting pool, wherein the filtering slag extractor is arranged in the digestion tank, and the slurry melting pool is arranged at the rear side of the digestion tank;

the finished product pulp tank is arranged at the rear side of the pulp melting tank.

Further, the digestion tank comprises a water filling port, a crushing bin, a mixing bin and an overflow bin, the crushing bin is located below the conveying belt, the water filling port is arranged above the crushing bin, the mixing bin is arranged below the crushing bin, and the overflow bin is arranged on the rear side of the mixing bin.

Furthermore, the filtering slag discharger is arranged at a slurry outlet of the mixing bin, and the slurry melting tank is arranged at a slurry outlet of the overflow bin.

Furthermore, a crushing roller is arranged in the crushing bin, and a stirrer is arranged in the mixing bin.

Further, be equipped with the suspension pump in the change thick liquid pond, be equipped with the deironing device on the conveyor belt, be equipped with vibrating device on the batching fill, be equipped with out the stuff pump in the finished product thick liquid pond.

Furthermore, the pulp outlets of the pulp melting tank and the finished product pulp tank are respectively provided with a filter.

Furthermore, the filtering slag discharger is provided with an overflow outlet and an underflow outlet, and the overflow outlet of the filtering slag discharger and the slurry outlet of the overflow bin are both connected with the slurry melting tank.

Further, conveyor belt is including weighing belt and pay-off belt, the pay-off belt is established at the belt rear of weighing, the filler is equipped with the flow valve.

Further, the density of the slurry in the slurry pond is 1150-1200 kg/m 3.

Further, the water source in the water filling port is gypsum filtrate water and desulfurization process water.

Further, the filtering precision of the filter in the pulp melting tank is that the grain diameter is larger than 2mm, and the filtering precision of the filter in the finished product pulp melting tank is that the grain diameter is larger than 0.25 mm.

Further, the inner wall of the batching hopper adopts mirror steel.

The utility model has the following beneficial effects:

the carbide slag is treated to ensure that the carbide slag is fully slurried to form a desulfurization reducing agent, and multi-stage filtration is arranged to reduce impurities in the slurry, so that the abrasion to pipelines and equipment of a desulfurization system is reduced, the slurry treatment effect is good, and the pulping equipment is compatible with the existing desulfurization system, so that the operation cost can be effectively reduced;

the process of firstly dewatering, curing and then pulping is adopted, the difficulty of treating the carbide slag is reduced, the concentration of the slurry is convenient to control, the Cl-concentration and the COD value of the carbide slag slurry are reduced, and the process water is utilized for pulping, so that the water balance of a desulfurization system is facilitated.

Drawings

FIG. 1 is a schematic view showing the overall structure of a production apparatus of the present invention;

FIG. 2 is a schematic diagram of a processing system according to the present invention.

Reference numerals: 1-feeding system, 11-stock bin, 12-batching hopper, 13-blanking belt, 14-conveying belt, 2-processing system, 21-digestion tank, 211-water adding port, 212-crushing bin, 213-mixing bin, 214-overflow bin, 22-filtering slag extractor, 23-pulp melting tank and 3-finished pulp tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the specification, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

As shown in fig. 1 and 2, the device for preparing the desulfurizer by using carbide slag comprises a feeding system 1, a processing system 2 and a finished product slurry tank 3, wherein the carbide slag sequentially passes through the feeding system 1, the processing system 2 and the finished product slurry tank 3 to form desulfurization slurry.

As shown in fig. 1, the feeding system 1 comprises a storage bin 11, a batching hopper 12, a blanking belt 13 and a conveying belt 14; be equipped with the carbide slag in the feed bin 11, the carbide slag gets into processing system 2 through batching fill 12, unloading belt 13 and conveyor belt 14 in proper order, unloading belt 13 is established in batching fill 12 below, conveyor belt 14 is established in unloading belt 13 below, processing system 2 is established at conveyor belt 14 terminally.

As shown in fig. 2, the treatment system 2 comprises a digestion tank 21, a filter slag discharger 22 and a slurry pond 23, wherein the filter slag discharger 22 is arranged in the digestion tank 21, and the slurry pond 23 is arranged at the rear side of the digestion tank 21; the finished product pulp tank 3 is arranged at the rear side of the pulp dissolving tank 23.

The principle of the utility model is as follows: carbide slag forms the solid matter that is convenient for carry through the dehydration mummification earlier, both conveniently carries, is convenient for control slurry concentration again, and after carbide slag and process water mixed formation thick liquid, adopt overflow play thick liquid and multistage filtering's mode to get rid of the impurity in the thick liquid to the thick liquid, both guaranteed the treatment effect of carbide slag slurrying, effectively reduce the influence of carbide slag thick liquid to desulfurization system again.

As shown in fig. 2, the digestion tank 21 further includes a water feeding port 211, a crushing bin 212, a mixing bin 213 and an overflow bin 214, the crushing bin 212 is located below the conveying belt 14, the water feeding port 211 is located above the crushing bin 212, the mixing bin 213 is located below the crushing bin 212, and the overflow bin 214 is located at the rear side of the mixing bin 213.

The digestion tank 21 is divided into a crushing bin 212 to realize the crushing of the carbide slag, a mixing bin 213 is used for mixing with process water to form slurry, wherein the slurry on the upper layer overflows to an overflow bin 214, and the overflow bin 214 is used for overflowing the slurry on the upper layer to avoid carrying a large amount of solid impurities. The thick liquid in mixing bin 213 is divided into two parts, the upper strata contains the direct overflow of the less thick liquid of solid impurity to overflow bin 214, lower floor's thick liquid gets into and filters in filtering out slag ware 22, later filter out the thick liquid of filter in the slag ware 22 and get into in the thick liquid pond 23 through the overflow once more, the thick liquid in overflow bin 214 directly gets into in the thick liquid pond 23 through the overflow, through the operation of above-mentioned cubic overflow, can reduce solid impurity in the thick liquid, and promote the stirring degree of mixing of carbide slag, effectively promote the concentration of reductant in the thick liquid, both guarantee the utilization efficiency of carbide slag, the damage of solid impurity to desulfurization system has been reduced again.

Preferably, the crushing bin 212 is provided with a crushing roller for crushing carbide slag, the mixing bin 213 is provided with a stirrer for stirring and mixing carbide slag and process water, the overflow bin 214 is provided with a water filtering plate and an overflow weir, and the slurry passes through the water filtering plate and then flows out through the overflow weir.

Further, the filtering slag discharger 22 is arranged at a slurry outlet of the mixing bin 213, and the slurry pond 23 is arranged at a slurry outlet of the overflow bin 214.

Furthermore, a suspension pump or a jacking stirrer is arranged in the slurry pond 23, so that the stirring efficiency can be effectively improved, the solid-liquid separation in the slurry can be effectively realized, and the filtering effect of impurities is ensured; be equipped with the deironing device on the conveyor belt 14, detach the metallic impurity in the carbide slag, be equipped with vibrating device on the batching fill 12, be equipped with out the stuff pump in the finished product thick liquid pond 3.

Preferably, the inner wall of batching fill 12 adopts the mirror surface steel of smooth processing, makes things convenient for the carbide slag landing, and the higher carbide slag of water content's that can effectively avoid piling up the jam is cooperated vibrating device.

Further, the pulp outlets of the pulp melting tank 23 and the finished product pulp tank 3 are both provided with filters.

Further, the filtering slag discharger 22 is provided with an overflow outlet and an underflow outlet, and the overflow outlet of the filtering slag discharger 22 and the slurry outlet of the overflow bin 214 are both connected with the slurry pond 23.

Further, conveyor belt 14 includes weighing belt and feeding belt, feeding belt establishes at weighing belt rear, filler 211 is equipped with the flow valve.

Preferably, through the linkage of the conveying belt 14 and the water filling port 211, 1150-1200 kg/m3 mixed liquid is formed in the digestion tank 21, and the concentration of the reducing agent is ensured to meet the requirement.

The use method of the device for preparing the desulfurizer by using the carbide slag comprises the following steps:

s1, solidifying the carbide slag: carrying out dehydration, filter pressing and solidification treatment on the carbide slag to form wet slag with the water content lower than 35%, wherein the wet slag is convenient to convey and easy to control the concentration, and the wet slag is conveyed into a storage bin 11;

s2, carbide slag feeding: conveying wet slag in a storage bin 11 to a batching hopper 12, and conveying the wet slag in the batching hopper 12 onto a feeding belt 13 and a conveying belt 14 through the feeding belt 13;

s3, removing iron from carbide slag: weighing the carbide slag on the conveying belt 14, and removing iron by using an iron removal device;

s4, crushing treatment: the carbide slag is conveyed into the digestion tank 21 through the conveying belt 14, the carbide slag is crushed through the crushing bin 212, the crushed carbide slag enters the mixing bin 213, and meanwhile, the water adding port 211 adds corresponding pulping water according to the weight of the carbide slag;

s5, stirring and rough filtering: the crushed carbide slag is stirred and mixed with pulping water in a mixing bin 213, and the pulp in the mixing bin 213 is coarsely filtered by a filtering slag discharger 22 and enters an overflow bin 214;

s6, pulping and mixing: the slurry in the overflow bin 214 overflows into the fluidized slurry pool 23, and the slurry is mixed in the fluidized slurry pool 23 to the density of 1150-1200 kg/m 3;

s7, fine filtering and mixing: and (3) the slurry in the slurry pond 23 is finely filtered and conveyed to the finished product slurry pond 3, the slurry is continuously stirred and mixed, and the uniformly mixed slurry is conveyed to the desulfurization flue.

Further, in step S4, the pulping water added by the water adding port 211 is gypsum filtrate water and desulfurization process water.

Further, in step S5, the filter slag discharger 22 removes impurities having a particle size of more than 2mm, and in the correction S7, the filter at the slurry outlet of the slurry tank 23 removes impurities having a particle size of more than 0.25 mm. The two-stage filtration and the overflow slurry discharging mode can effectively reduce the content of solid impurities in the slurry and avoid the influence on a desulfurization system.

Preferably, the carbide slag impurities filtered in the steps S5 and S7 are conveyed and collected together.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Claims

1. A device for preparing a desulfurizer by using carbide slag is characterized by comprising a feeding system (1), a treatment system (2) and a finished product slurry tank (3), wherein the carbide slag sequentially passes through the feeding system (1), the treatment system (2) and the finished product slurry tank (3) to form desulfurization slurry;

the feeding system (1) comprises a storage bin (11), a batching hopper (12), a discharging belt (13) and a conveying belt (14); carbide slag is arranged in the storage bin (11), and sequentially enters the treatment system (2) through the batching hopper (12), the blanking belt (13) and the conveying belt (14), wherein the blanking belt (13) is arranged below the batching hopper (12), the conveying belt (14) is arranged below the blanking belt (13), and the treatment system (2) is arranged at the tail end of the conveying belt (14);

the treatment system (2) comprises a digestion tank (21), a filtering slag extractor (22) and a slurry melting pool (23), wherein the filtering slag extractor (22) is arranged in the digestion tank (21), and the slurry melting pool (23) is arranged at the rear side of the digestion tank (21); the finished product pulp tank (3) is arranged at the rear side of the pulp melting tank (23);

the digestion tank (21) comprises a water filling port (211), a crushing bin (212), a mixing bin (213) and an overflow bin (214), wherein the crushing bin (212) is positioned below the conveying belt (14), the water filling port (211) is arranged above the crushing bin (212), the mixing bin (213) is arranged below the crushing bin (212), and the overflow bin (214) is arranged at the rear side of the mixing bin (213);

be equipped with the suspension pump in change thick liquid pond (23), be equipped with the deironing device on conveyor belt (14), be equipped with vibrating device on batching fill (12), be equipped with out the stuff pump in finished product thick liquid pond (3).

2. The apparatus for preparing desulfurizing agent by carbide slag as claimed in claim 1, wherein: the filtering slag extractor (22) is arranged at a slurry outlet of the mixing bin (213), and the slurry melting tank (23) is arranged at a slurry outlet of the overflow bin (214).

3. The apparatus for preparing desulfurizing agent by carbide slag as claimed in claim 1, wherein: the crushing bin (212) is internally provided with a crushing roller, and the mixing bin (213) is internally provided with a stirrer.

4. The apparatus for preparing desulfurizing agent by carbide slag as claimed in claim 1, wherein: and filters are arranged at the pulp outlets of the pulp melting tank (23) and the finished product pulp tank (3).

5. The apparatus for preparing desulfurizing agent by carbide slag as claimed in claim 1, wherein: the filtering slag discharger (22) is provided with an overflow outlet and an underflow outlet, and the overflow outlet of the filtering slag discharger (22) and the slurry outlet of the overflow bin (214) are both connected with the slurry pond (23).

6. The apparatus for preparing desulfurizing agent by carbide slag as claimed in claim 1, wherein: conveyor belt (14) are including weighing belt and pay-off belt, the pay-off belt is established at the belt rear of weighing, filler (211) are equipped with the flow valve.

7. The apparatus for preparing desulfurizing agent by carbide slag as claimed in claim 1, wherein: the density of the slurry in the slurry pond (23) is 1150-1200 kg/m 3.

8. The apparatus for preparing desulfurizing agent by carbide slag as claimed in claim 1, wherein: the water source in the water filling port (211) is gypsum filtrate water and desulfurization process water.

9. The apparatus for preparing desulfurizing agent by carbide slag as claimed in claim 4, wherein: the filter precision of the filter in the pulp melting tank (23) is more than 2mm, and the filter precision of the filter in the finished product pulp tank (3) is more than 0.25 mm.

10. The apparatus for preparing desulfurizing agent by carbide slag as claimed in claim 2, wherein: the inner wall of the batching hopper (12) is made of mirror steel.