Accurate density control carbide slag pulping system

Abstract

The invention discloses a carbide slag slurrying system capable of accurately controlling density, which comprises a slurrying pool and two carbide slag slurry pools, the slurrying pool and the two carbide slag slurry pools are respectively provided with a jacking stirrer, the slurrying pool is communicated with the two carbide slag slurry pools through a conveying pipeline group, and the conveying pipeline group is communicated with the two carbide slag slurry pools. A carbide slag transfer pump, a densimeter and a centrifugal classifying screen are arranged on the conveying pipeline group, the densimeter is arranged at an outlet of the carbide slag transfer pump, the centrifugal classifying screen is positioned above the carbide slag slurry pool, and a discharge port of the centrifugal classifying screen is communicated with a feed port of the slag discarding box through a first conveying pipeline. The densimeter is mounted at the outlet of the carbide slag transfer pump and can monitor the density of carbide slag slurry in real time; after the density meets the requirement, transferring to a carbide slag slurry tank; and when the density does not meet the requirement, returning to the slurrying pool, and adding the carbide slag or process water to continuously prepare the carbide slag slurry.

Description

Technical Field

[0001] The invention relates to the technical field of desulfurization, and in particular to a carbide slag pulping system with precisely controlled density. Background Art

[0002] Calcium carbide slag is an industrial waste, the main component of which is Ca(OH)2. It has the characteristics of large specific surface area, good activity and small particle size, and is very suitable for flue gas desulfurization. At present, most domestic power plants use calcium carbide slag slurry as a desulfurizer to absorb sulfur dioxide in flue gas. However, in actual use, the existing calcium carbide slag slurry preparation system has a density meter installed in the fine slurry pool, which cannot monitor the density of the calcium carbide slag slurry in real time. Summary of the invention

[0003] The purpose of the present invention is to provide a carbide slag pulping system with precise density control to solve the problems existing in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A carbide slag pulping system with precise density control comprises a pulping tank and two carbide slag slurry tanks, the pulping tank and the two carbide slag slurry tanks are both equipped with jacking agitators, the pulping tank is connected with the two carbide slag slurry tanks through a conveying pipeline group, the conveying pipeline group is provided with a carbide slag transfer pump, a density meter and a centrifugal grading screen, the density meter is arranged at the outlet of the carbide slag transfer pump, the centrifugal grading screen is located above the carbide slag slurry tank, and the discharge port of the centrifugal grading screen is connected with the feed port of a waste slag box through a first conveying pipeline.

[0006] Two liquid outlets are arranged near the bottom of one side of the pulping tank.

[0007] The conveying pipeline group includes a second conveying pipeline, a third conveying pipeline, and a fourth conveying pipeline. One end of the second conveying pipeline and the third conveying pipeline are respectively connected to the liquid outlet of the pulping pool, the other end of the second conveying pipeline is connected to the liquid inlet of a carbide slag slurry pool, the other end of the third conveying pipeline is connected to the second conveying pipeline, one end of the fourth conveying pipeline is connected to the liquid inlet of another carbide slag slurry pool, and the other end of the fourth conveying pipeline is connected to the second conveying pipeline; the second conveying pipeline and the third conveying pipeline are both provided with carbide slag transfer pumps, the second conveying pipeline is provided with a density meter, and the density meter is located at the carbide slag transfer pump.

[0008] The second conveying pipeline is connected to one end of the return pipeline, and the other end of the return pipeline is connected to the pulping tank.

[0009] The screen diameter of the centrifugal grading screen is about 2 mm.

[0010] A steel grate is installed at the discharge port of the pulping tank, and the tank wall below the steel grate has a slope of 80°.

[0011] The hole size of the steel grate is not less than 100mm×100mm.

[0012] The bottoms of the pulping pool and the two carbide slag slurry pools are both provided with emptying doors and emptying pipes.

[0013] The pulping tank is connected to a process water delivery pipeline.

[0014] The advantages of the present invention are as follows: the density meter in the present invention is installed at the outlet of the carbide slag transfer pump, and can monitor the density of the carbide slag slurry in real time; when the density reaches the requirement, it is transferred to the carbide slag slurry pool; when the density does not meet the requirement, it returns to the slurry pool to add carbide slag or process water to continue to prepare the carbide slag slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure numerals: 1. pulping tank; 2. carbide slag slurry tank; 3. carbide slag transfer pump; 4. density meter; 5. centrifugal grading screen; 6. first conveying pipeline; 7. waste slag box; 8. second conveying pipeline; 9. third conveying pipeline; 10. fourth conveying pipeline; 11. reflux pipeline; 12. steel grate; 13. top-feed agitator; 14. process water conveying pipeline. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1As shown, a carbide slag pulping system with precise density control includes a pulping pool 1 and two carbide slag slurry pools 2. The pulping pool 1 and the two carbide slag slurry pools 2 are both equipped with a top-feed agitator 13. The pulping pool 1 is connected to the two carbide slag slurry pools 2 through a conveying pipeline group. The conveying pipeline group is provided with a carbide slag transfer pump 3, a density meter 4 and a centrifugal grading screen 5. The density meter 4 is arranged at the outlet of the carbide slag transfer pump 3, and the centrifugal grading screen 5 is located above the carbide slag slurry pool 2. The discharge port of the centrifugal grading screen 5 is connected to the feed port of the waste slag box 7 through the first conveying pipeline 6.

[0020] Two liquid outlets are arranged on one side of the pulping tank 1 near the bottom.

[0021] The conveying pipeline group includes a second conveying pipeline 8, a third conveying pipeline 9, and a fourth conveying pipeline 10. One end of the second conveying pipeline 8 and the third conveying pipeline 9 are respectively connected to the liquid outlet of the pulping pool 1, the other end of the second conveying pipeline 8 is connected to the liquid inlet of a carbide slag slurry pool 2, the other end of the third conveying pipeline 9 is connected to the second conveying pipeline 8, one end of the fourth conveying pipeline 10 is connected to the liquid inlet of another carbide slag slurry pool 2, and the other end of the fourth conveying pipeline 10 is connected to the second conveying pipeline 8; the second conveying pipeline 8 and the third conveying pipeline 9 are both provided with a carbide slag transfer pump 3, the second conveying pipeline 8 is provided with a density meter 4, and the density meter 4 is located at the carbide slag transfer pump 3.

[0022] The second conveying pipeline 8 is connected to one end of the return pipeline 11 , and the other end of the return pipeline 11 is connected to the pulping tank 1 .

[0023] The screen diameter of the centrifugal grading screen 5 is about 2 mm.

[0024] A steel grate 12 is installed at the discharge port of the pulping tank 1, and the tank wall below the steel grate 12 has a slope of 80°.

[0025] The hole size of the steel grate 12 is not less than 100 mm×100 mm.

[0026] A process water pipeline is arranged in the steel grate 12 to wash the falling wet carbide slag.

[0027] The bottoms of the pulping tank 1 and the two carbide slag pulp tanks 2 are both provided with emptying doors and emptying pipes.

[0028] The pulping tank 1 is connected to a process water delivery pipeline 14 .

[0029] The process water is sewage treated by a deep sewage treatment system.

[0030] The coarse slurry pool 1 and the two carbide slag slurry pools 2 are both semi-open in design. A "cross"-shaped concrete top cover is arranged on the top of the coarse slurry pool 1 and the two carbide slag slurry pools 2, and holes are reserved for installing the top-entry agitator 23. People can walk on the top of the top cover or inspect equipment. The width is about 2.5m, and the rest of the cover is open. A fiberglass grating is arranged on the top of the open area, and steel guardrails are arranged around it.

[0031] The coarse pulp pool 1 and the two carbide slag pulp pools 2 are both protected from corrosion by the inner walls of vinyl resin glass flakes.

[0032] Working principle:

[0033] The carbide slag falls into the pulping tank 1 through the steel grate 12. At the same time, process water enters the pulping tank 1 through the process water delivery pipe 14. The top-entry agitator 13 works to mix the carbide slag and process water to obtain carbide slag slurry. Then, the two carbide slag transfer pumps 8 work to make the carbide slag slurry in the pulping tank 1 enter the delivery pipe group. When the density of the carbide slag slurry measured by the density meter 4 on the delivery pipe group reaches about 25% of the solid content of the slurry, the carbide slag slurry continues to be transported to the two carbide slag slurry tanks 2 arranged above through the delivery pipe group. The carbide slag slurry is screened in the centrifugal grading screen 5 to remove coarse particles in the slurry. The screened carbide slag slurry flows from the bottom of the centrifugal grading screen 5 into the carbide slag slurry pool 2 by gravity, and the separated larger particles enter the waste slag box 7 through the first conveying pipe 6, and are regularly pulled out by vehicles and transported to the ash field for landfill; when the density meter 4 on the conveying pipe group measures that the density of the carbide slag slurry does not reach about 25% of the solid content of the slurry, the carbide slag slurry is transported back into the pulping pool 1 through the reflux pipe 11 to add carbide slag or process water to continue to configure the carbide slag slurry.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A carbide slag pulping system with precise density control, characterized by: The invention comprises a pulping tank (1) and two carbide slag pulping tanks (2). The pulping tank (1) and the two carbide slag pulping tanks (2) are both provided with a top-feeding agitator (13). The pulping tank (1) and the two carbide slag pulping tanks (2) are connected with each other through a conveying pipeline group. A carbide slag transfer pump (3), a density meter (4) and a centrifugal grading screen (5) are provided on the conveying pipeline group. The density meter (4) is provided at the outlet of the carbide slag transfer pump (3). The centrifugal grading screen (5) is located above the carbide slag pulping tank (2). The discharge port of the centrifugal grading screen (5) is connected with the feed port of a slag waste box (7) through a first conveying pipeline (6).

2. The carbide slag pulping system with precise density control according to claim 1 is characterized in that: Two liquid outlets are provided on one side of the pulping tank (1) near the bottom.

3. The carbide slag pulping system with precise density control according to claim 1 is characterized in that: The conveying pipeline group comprises a second conveying pipeline (8), a third conveying pipeline (9), and a fourth conveying pipeline (10); one end of the second conveying pipeline (8) and the third conveying pipeline (9) are respectively connected to the liquid outlet of the pulping pool (1); the other end of the second conveying pipeline (8) is connected to the liquid inlet of a carbide slag slurry pool (2); the other end of the third conveying pipeline (9) is connected to the second conveying pipeline (8); one end of the fourth conveying pipeline (10) is connected to the liquid inlet of another carbide slag slurry pool (2); and the other end of the fourth conveying pipeline (10) is connected to the second conveying pipeline (8); the second conveying pipeline (8) and the third conveying pipeline (9) are both provided with a carbide slag transfer pump (3); the second conveying pipeline (8) is provided with a density meter (4), and the density meter (4) is located on the carbide slag transfer pump (3).

4. The carbide slag pulping system with precise density control according to claim 1 is characterized in that: The second conveying pipeline (8) is connected to one end of the return pipeline (11), and the other end of the return pipeline (11) is connected to the pulping tank (1).

5. The carbide slag pulping system with precise density control according to claim 1 is characterized in that: The screen diameter of the centrifugal grading screen (5) is about 2 mm.

6. The carbide slag pulping system with precise density control according to claim 1, characterized in that: A steel grate (12) is installed at the discharge port of the pulping tank (1), and the tank wall below the steel grate (12) has a slope of 80°.

7. The carbide slag pulping system with precise density control according to claim 1, characterized in that: The hole size of the steel grate (12) is not less than 100 mm×100 mm.

8. The carbide slag pulping system with precise density control according to claim 1, characterized in that: The bottoms of the pulping tank (1) and the two carbide slag pulp tanks (2) are both provided with emptying doors and emptying pipes.

9. The carbide slag pulping system with precise density control according to claim 1, characterized in that: The pulping tank (1) is connected to a process water delivery pipeline (14).

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