Comprehensive utilization device for waste heat of carbide slag and discharged calcium carbide

Abstract

The utility model belongs to the technical field of calcium carbide production and solid waste resource utilization, and particularly relates to a comprehensive utilization device for waste heat of calcium carbide slag and discharged calcium carbide, which comprises a calcium carbide furnace, a material storage tank arranged at a furnace outlet of the calcium carbide furnace, and a material spraying unit arranged at a material outlet of the material storage tank, the calcium carbide crucible is communicated with a furnace outlet of the calcium carbide furnace; the calcium carbide crucible is positioned below an outlet of the spraying unit, and the outlet of the spraying unit is communicated with the calcium carbide crucible; after being blown to the calcium carbide crucible through the spraying unit, the small-particle mixed raw materials stored in the storage tank are mixed with liquid calcium carbide conveyed to the calcium carbide crucible from the calcium carbide furnace, and the small-particle mixed raw materials exchange heat with the liquid calcium carbide. According to the utility model, carbide slag is recycled, so that the problems of land resource waste and environmental pollution caused by carbide slag stacking are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to calcium carbide production technology and solid waste resource utilization technical field, specifically relates to a calcium carbide slag and furnace slag calcium carbide waste heat comprehensive utilization device. BACKGROUND

[0002] Calcium carbide slag is a by-product in the production process of polyvinyl chloride, and its main component is calcium hydroxide, which has the characteristics of large output, many impurity types and strong alkalinity. Calcium carbide slag can be widely used in transportation, chemical industry, environmental protection and building materials, etc. The comprehensive utilization of calcium carbide slag not only can obtain economic benefits, but also has good social benefits.

[0003] In the resource utilization of calcium carbide slag, many related researches have been done at home and abroad, for example: using calcium carbide slag powder to mix with limestone as limestone-gypsum wet flue gas desulfurization agent; using industrial waste slag calcium carbide slag as raw material, adopting high-temperature calcium cycle technology to capture CO2; using calcium carbide slag (CS) and white Portland cement (WPC) to mix, preparing non-sintered ore hydraulic lime (HL); using calcium carbide slag instead of lime to prepare calcium carbide, realizing the "calcium cycle" technical route of "calcium carbide slag-calcium oxide-calcium carbide-acetylene-calcium carbide slag"; using calcium carbide slag as raw material to prepare cement.

[0004] At present, China has become the largest calcium carbide production and consumption country in the world, and the annual output of calcium carbide slag in China exceeds 27 million tons. Even though many mature technologies can effectively utilize calcium carbide slag, the amount of calcium carbide slag utilized is limited, and the problem of large accumulation of calcium carbide slag cannot be solved, which causes waste of land resources and environmental pollution. Therefore, how to reasonably utilize the large amount of calcium carbide slag has become a problem to be solved.

[0005] In addition, the furnace outlet of the calcium carbide furnace has a high temperature; when the calcium carbide is discharged, the temperature of the liquid calcium carbide is as high as 1800 DEG C or above, and the liquid calcium carbide needs to be loaded into the calcium carbide pot for natural cooling. After the temperature of the liquid calcium carbide is reduced to below 100 DEG C, the calcium carbide lump is taken out and loaded into a vehicle for transportation and storage. During the cooling process of the liquid calcium carbide after being discharged, the high heat contained in the liquid calcium carbide is all wasted, and is not reasonably utilized. UTILITY MODEL CONTENTS

[0006] The problem to be solved by the utility model is: how to effectively utilize a large amount of calcium carbide slag, effectively utilize a large amount of low-quality coal powder, and solve the problems of waste of furnace temperature of the calcium carbide furnace and waste of high temperature contained in the liquid calcium carbide.

[0007] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0008] The utility model provides a calcium carbide slag and calcium carbide after discharging waste heat comprehensive utilization device, including calcium carbide furnace, still including the storage tank of setting up in the discharging port side of calcium carbide furnace, the material spraying unit of setting up at the discharge port of storage tank to with the calcium carbide ladle that communicates with the discharging port of calcium carbide furnace, and the calcium carbide ladle is located the export below material spraying unit, and the export of material spraying unit communicates with the calcium carbide ladle, and the storage tank stores small particle mixed raw material, and after blowing to the calcium carbide ladle through material spraying unit, mixes with the liquid calcium carbide from the calcium carbide furnace to the calcium carbide ladle, and small particle mixed raw material exchanges heat with liquid calcium carbide.

[0009] Further, the material spraying unit comprises a material spraying pipe and a gas storage tank.

[0010] Further, the inlet of the material spraying pipe communicates with the outlet of the gas storage tank, and the gas storage tank is used for storing compressed air and delivering air to the material spraying pipe.

[0011] Further, the outlet of the material spraying pipe communicates with the wall of the material spraying pipe.

[0012] Further, the outlet of the material spraying pipe is located at the top of the calcium carbide ladle.

[0013] Further, a valve one is arranged on the left side of the gas storage tank.

[0014] Further, a valve two is arranged on the lower part of the storage tank.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model utilizes the calcium carbide ladle to recycle the liquid calcium carbide from the calcium carbide furnace, sets the storage tank at the discharging port of the calcium carbide furnace to preheat the small particle mixed raw material in the storage tank, utilizes the material spraying unit to spray and blow the preheated small particle mixed raw material in the storage tank into the calcium carbide ladle to mix with the liquid calcium carbide, utilizes the temperature of the liquid calcium carbide after discharging to change the small particle mixed raw material into calcium carbide, not only reasonably utilizes the temperature of the liquid calcium carbide, but also accelerates the cooling speed of the liquid calcium carbide. The calcium carbide slag is recycled, which solves the problem of calcium carbide slag stacking, causes land resource waste and environmental pollution, and realizes the recycling of the calcium carbide preheating after discharging.

[0017] 2. The calcium carbide slag and the low-grade coke powder (particle size ≤3mm) that cannot be used for normal production are reasonably utilized, the use value of the low-grade coke powder is improved, and the reasonable recycling rate of solid waste resources is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structure schematic view of the calcium carbide slag and calcium carbide after discharging waste heat comprehensive utilization device of the utility model;

[0019] Figure 2 It is the flow chart of the calcium carbide slag conversion of the utility model.

[0020] Mark No. 1 is calcium carbide furnace; 11 is furnace outlet; 2 is storage tank; 21 is valve two; 3 is injection unit; 31 is injection pipe; 32 is gas storage tank; 33 is valve one; 4 is calcium carbide crucible. DETAILED DESCRIPTION

[0021] The technical solutions of the present application will be described clearly below in combination with the drawings. Obviously, the described embodiments are not all the embodiments of the present application, and all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0022] It should be noted that the terms "center", "upper", "lower", "horizontal", "left", "right", "front", "rear", "transverse", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0023] EMBODIMENT

[0024] As shown in Figure 1 The present application provides a calcium carbide slag and furnace discharge calcium carbide waste heat comprehensive utilization device, which comprises a calcium carbide furnace 1, a storage tank 2 arranged on one side of a furnace outlet 11 of the calcium carbide furnace 1, an injection unit 3 arranged at a discharge port of the storage tank 2, and a calcium carbide crucible 4 in communication with the furnace outlet 11 of the calcium carbide furnace 1.

[0025] The calcium carbide furnace 1 is used to output liquid calcium carbide, and the temperature of the liquid calcium carbide is as high as 1800℃ or above. The liquid calcium carbide is loaded into the calcium carbide crucible 4 through the furnace outlet 11 of the calcium carbide furnace 1 for natural cooling. After the temperature drops to 100℃ or below, the formed calcium carbide lumps are taken out and loaded into a vehicle for transportation out of the warehouse.

[0026] The storage tank 2 is used to store small-particle mixed raw materials. The small-particle mixed raw materials are placed in the storage tank 2 on one side of the furnace outlet 11 of the calcium carbide furnace 1. The furnace outlet 11 has a high temperature, and the small-particle mixed raw materials are preheated by using the temperature.

[0027] As shown in Figure 2 The formation process of the small-particle mixed raw materials includes the following steps:

[0028] Mix the calcined carbide slag and the powdered semi-coke (particle size ≤3mm) in a ratio of 1:0.75 to form a mixed raw material; ball pressing: use a ball press to press the mixed raw material into briquettes with a particle size diameter ≤40mm; then carbonize and dry the briquettes; then use a crusher to crush the carbonized and dried briquettes of the calcined carbide slag and the powdered semi-coke into small particles (3mm ≤ particle size ≤8mm) to form a small particle mixed raw material, and store the small particle mixed raw material in a storage tank 2.

[0029] The material spraying unit 3 comprises a material spraying pipe 31 and a gas storage tank 32, the gas storage tank 32 is used for storing compressed air, the inlet of the material spraying pipe 31 is in communication with the outlet of the gas storage tank 32, and a valve one 33 is arranged on the left side of the gas storage tank 32.

[0030] The outlet at the bottom of the storage tank 1 is in communication with the pipe wall of the material spraying pipe 31, and a valve two 21 is arranged at the lower part of the storage tank 1. The outlet of the material spraying pipe 31 is located at the top of the carbide crucible 4.

[0031] When the liquid carbide flows out of the outlet 11 to the carbide crucible 4, the valve two 21 at the lower part of the storage tank 1 is opened, after the valve two 21 is opened, the small particle mixed raw material in the storage tank 1 is discharged to the material spraying pipe 31; the valve one 33 on the left side of the gas storage tank 32 is opened, after the valve one 33 is opened, the compressed air is released into the material spraying pipe 31, and the compressed air sprays the small particle mixed raw material in the material spraying pipe 31 from the storage tank 1 into the carbide crucible 4.

[0032] Therefore, when the carbide is discharged, the small particle mixed raw material in the storage tank 2 is sprayed into the carbide crucible 4 by the material spraying unit 3, mixed with the liquid carbide, and the small particle mixed raw material is changed into carbide by using the temperature of the discharged liquid carbide, not only the temperature of the liquid carbide is reasonably utilized, but also the cooling speed of the liquid carbide is accelerated, and the effect of rapid discharge is achieved. In addition, the carbide slag and the semi-coke powder which cannot be used for normal production are reasonably utilized, and the reasonable reutilization rate of solid waste resources is improved.

[0033] The main component of the carbide slag is calcium hydroxide (Ca(OH)2→CaO+H2O), which is changed into calcium oxide after drying. According to the principle of carbide production (CaO+3C→CaC2+CO), 1.41 tons of carbide slag (calculated according to the content of calcium hydroxide in the carbide slag, which is 82%) and 0.67 tons of semi-coke powder (calculated according to the content of carbon in the semi-coke powder, which is 84%) can be effectively utilized for producing 1 ton of carbide.

[0034] The above technical features constitute the best embodiment of the present application, which has strong adaptability and optimal implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the needs of different situations.

[0035] Finally, it should be noted that the above is merely to illustrate the technical solutions of the present application, and is not a limitation on the scope of protection of the present application, and simple modifications or equivalent replacements of the technical solutions of the present application by those skilled in the art do not deviate from the essence and scope of the technical solutions of the present application.

Claims

1. A calcium carbide slag and discharged calcium carbide residual heat comprehensive utilization device, comprising a calcium carbide furnace, characterized in that, The application also comprises a storage tank arranged at one side of the outlet of the calcium carbide furnace, a material spraying unit arranged at the outlet of the storage tank, and a calcium carbide ladle communicated with the outlet of the calcium carbide furnace; the calcium carbide ladle is located below the outlet of the material spraying unit, the outlet of the material spraying unit is communicated with the calcium carbide ladle; the small-particle mixed raw materials stored in the storage tank are blown to the calcium carbide ladle through the material spraying unit, and then mixed with the liquid calcium carbide transported to the calcium carbide ladle from the calcium carbide furnace to exchange heat with the liquid calcium carbide.

2. The calcium carbide slag and tapped calcium carbide residual heat comprehensive utilization device according to claim 1, characterized in that, The material spraying unit comprises a material spraying pipe and a gas storage tank.

3. The calcium carbide slag and tapped calcium carbide residual heat comprehensive utilization device according to claim 2, characterized in that, The inlet of the material spraying pipe is communicated with the outlet of the gas storage tank, and the gas storage tank is used for storing compressed air and delivering the air to the material spraying pipe.

4. The calcium carbide slag and tapped calcium carbide residual heat comprehensive utilization device according to claim 2, characterized in that, The outlet of the bottom of the storage tank is communicated with the pipe wall of the material spraying pipe.

5. The calcium carbide slag and tapped calcium carbide residual heat comprehensive utilization device according to claim 2, characterized in that, The outlet of the material spraying pipe is located at the top of the calcium carbide ladle.

6. The calcium carbide slag and tapped calcium carbide residual heat comprehensive utilization device according to claim 2, characterized in that, A valve one is arranged at the left side of the storage tank.

7. The device according to claim 1, characterized in that, A valve two is arranged at the lower part of the storage tank.

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