System for preparing high-concentration coal water slurry from pipeline-conveyed coal slurry

Abstract

The utility model discloses a system for preparing high-concentration coal water slurry from pipeline-conveyed coal slurry, which comprises a centrifugal machine, and a discharge port of the centrifugal machine is connected with a feed port of a concentration system through a pipeline; a discharge hole of the concentration system is respectively connected with a feed barrel of the filter press and a feed hole of the first kneading and mixing machine through pipelines; a discharging hole of the filter press feeding barrel is connected with a feeding hole of the filter press through a pipeline; a discharging hole of the filter press is connected with a feeding hole of the first kneading and mixing machine through a belt; a discharge port of the first kneading and mixing machine is respectively connected with a feed port of the fine grinding machine and a feed port of the second kneading and mixing machine through pipelines; a discharging hole of the fine grinding machine is connected with a feeding hole of the superfine grinding machine through a pipeline; a discharge port of the superfine mill is connected with a feed port of the second kneading and mixing machine through a pipeline, and the feed port of the second kneading and mixing machine is further connected with a discharge port of the centrifugal machine through a belt. The system disclosed by the utility model has the characteristics of reducing the recovery ratio of filter-pressing fine coal from centrifugate, reducing the production power consumption of equipment such as a filter press and a kneading and mixing machine, and reducing the production cost.

Description

TECHNICAL FIELD

[0001] The utility model belongs to high concentration coal water slurry preparation system technical field, concretely relates to the system of pipe coal slurry preparation high concentration coal water slurry. BACKGROUND

[0002] Compared with traditional coal transportation modes such as train and automobile, long-distance pipeline coal transportation technology has the advantages of green and clean, economic and efficient, and has good development prospects in the coal transportation industry. The coal slurry for long-distance pipeline transportation is medium concentration pipe coal slurry. Due to the low concentration, it cannot be directly used by chemical users at the transportation terminal, and needs to be concentrated to high concentration coal water slurry at the pipeline terminal for user use, or be dehydrated to clean coal for sale. The system for preparing high concentration coal water slurry from pipe coal slurry mainly includes a centrifuge, a thickening machine, a filter press, a kneading machine and a fine grinder, etc. The existing concentration and slurry preparation process is a "medium concentration dehydration + superfine grinding and slurry preparation" process. Specifically, the pipe coal slurry is dehydrated by centrifugation to recover coarse coal particles to form centrifugal coarse coal, fine coal particles in the centrifugal liquid are recovered by a filter press, part of the filter-pressed fine coal is diluted and kneaded with water, and then the fine coal is ground by a fine grinder and a superfine grinder, and then the high concentration coal water slurry is prepared by kneading the centrifugal coarse coal, the filter-pressed fine coal, process water and additives. The connection relationship between the machines of the existing system causes the process to dehydrate all the pipe coal slurry to clean coal and then grind and prepare slurry by adding water, which has the disadvantages of complex process, large production energy consumption and the like. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a system for preparing high concentration coal water slurry from pipe coal slurry, which has the characteristics of reducing the proportion of filter-pressed fine coal recovered from the centrifugal liquid, reducing the production power consumption of the filter press and the kneading machine and the like, and reducing the production cost.

[0004] The utility model adopts the technical scheme that the system for preparing high concentration coal water slurry from pipe coal slurry comprises a centrifuge, the discharge port of the centrifuge is connected with the feed inlet of a thickening system through a pipeline, the discharge port of the thickening system is connected with the feed barrel of a filter press and the feed inlet of a first kneading machine through pipelines respectively, the discharge port of the filter press feed barrel is connected with the feed inlet of the filter press through a pipeline, the discharge port of the filter press is connected with the feed inlet of the first kneading machine through a belt, the discharge port of the first kneading machine is connected with the feed inlet of a fine grinder and the feed inlet of a second kneading machine through pipelines respectively, the discharge port of the fine grinder is connected with the feed inlet of a superfine grinder through a pipeline, the discharge port of the superfine grinder is connected with the feed inlet of the second kneading machine through a pipeline, and the feed inlet of the second kneading machine is also connected with the discharge port of the centrifuge through a belt.

[0005] The utility model has the characteristics that:

[0006] The feed inlet of the centrifuge is connected with the discharge port of a material stabilizing barrel through a pipeline, the feed inlet of the material stabilizing barrel is connected with the pipeline of the pipe coal slurry, and the discharge port of the second kneading machine is connected with a slurry outlet pipeline.

[0007] The outlet of the concentration system is also connected with the water treatment system through a pipeline.

[0008] The inlet of the first kneading mixer and the inlet of the second kneading mixer are connected with the additive tank through a pipeline.

[0009] An additive pump is arranged on the pipeline between the first kneading mixer and the additive tank, and on the pipeline between the second kneading mixer and the additive tank.

[0010] A conveying pump is arranged on the pipeline of the inlet of the steady material barrel, on the pipeline between the centrifugal machine and the concentration system, on the pipeline between the concentration system and the filter press inlet barrel, on the pipeline between the filter press inlet barrel and the filter press, on the pipeline between the concentration system and the first kneading mixer, on the pipeline between the first kneading mixer and the second kneading mixer, on the pipeline between the fine grinding machine and the ultra-fine grinding machine, and on the pipeline between the ultra-fine grinding machine and the second kneading mixer.

[0011] A quantitative feeder is arranged on the belt between the filter press and the first kneading mixer, and on the belt between the centrifugal machine and the second kneading mixer.

[0012] The pipe-conveyed coal slurry preparation high-concentration coal water slurry system has the advantages that the original pipe-conveyed coal slurry concentration process can be simplified, the proportion of filter-pressed coal prepared by the concentrated machine underflow can be reduced, the concentrated machine underflow can be directly mixed in the concentration system, the production power consumption of the filter press and the kneading mixer and other equipment can be reduced, and the production cost can be reduced.

[0013] The pipe-conveyed coal slurry preparation high-concentration coal water slurry system can simplify the original pipe-conveyed coal slurry concentration process, reduce the proportion of filter-pressed coal prepared by the concentrated machine underflow, directly mix the concentrated machine underflow into the concentration system, reduce the production power consumption of the filter press and the kneading mixer and other equipment, and reduce the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structure schematic view of the pipe-conveyed coal slurry preparation high-concentration coal water slurry system.

[0015] In the figure, 1 is a steady material barrel, 2 is a centrifugal machine, 3 is a concentration system, 4 is a filter press inlet barrel, 5 is a filter press, 6 is a first kneading mixer, 7 is a fine grinding machine, 8 is an ultra-fine grinding machine, 9 is a second kneading mixer, 10 is a water treatment system, and 11 is an additive tank. DETAILED DESCRIPTION

[0016] The pipe-conveyed coal slurry preparation high-concentration coal water slurry system will be described in detail below in combination with the drawings and specific embodiments.

[0017] The pipe-conveyed coal slurry preparation high-concentration coal water slurry system of the utility model, such as Figure 1As shown, the system comprises a centrifuge 2, a feed inlet of the centrifuge 2 is connected to a discharge outlet of the stable material barrel 1 through a pipeline, and a feed inlet of the stable material barrel 1 is connected to a pipeline for transporting coal slurry. The stable material barrel 1 is arranged above the centrifuge 2, the pipeline for transporting coal slurry of the stable material barrel 1 flows into the centrifuge 2, and the stability of feeding and discharging of the centrifuge 2 is ensured. A discharge outlet of the centrifuge 2 is connected to a feed inlet of the thickening system 3 through a pipeline, the thickening system 3 can adopt multi-stage thickening, and the thickening efficiency is improved in the mode of adding an inclined plate or adding a reagent, so that 100% of coal particles are recovered. A discharge outlet of the thickening system 3 is connected to a feed inlet of the filter press feeding barrel 4 and a feed inlet of the first kneading machine 6 through pipelines respectively; the discharge outlet of the thickening system 3 is also connected to a water treatment system 10 through a pipeline; a discharge outlet of the filter press feeding barrel 4 is connected to a feed inlet of the filter press 5 through a pipeline; a discharge outlet of the filter press 5 is connected to a feed inlet of the first kneading machine 6 through a belt, and a quantitative feeder is arranged on the belt, the quantitative feeder sets a certain feeding amount according to the concentration requirement of the prepared coal slurry to ensure the concentration of the prepared coal slurry; a discharge outlet of the first kneading machine 6 is connected to a feed inlet of the fine grinder 7 and a feed inlet of the second kneading machine 9 through pipelines respectively; the feed inlet of the first kneading machine 6 is also connected to the additive tank 11 through a pipeline, and an additive pump is arranged on the pipeline between the first kneading machine 6 and the additive tank 11; a discharge outlet of the fine grinder 7 is connected to a feed inlet of the superfine grinder 8 through a pipeline; a discharge outlet of the superfine grinder 8 is connected to a feed inlet of the second kneading machine 9 through a pipeline, and the feed inlet of the second kneading machine 9 is also connected to a discharge outlet of the centrifuge 2 through a belt, and a quantitative feeder is arranged on the belt; the feed inlet of the second kneading machine 9 is also connected to the additive tank 11 through a pipeline, and an additive pump is arranged on the pipeline between the second kneading machine 9 and the additive tank 11; and a discharge outlet of the second kneading machine 9 is connected to a slurry outlet pipeline.

[0018] Pumps are arranged on the pipeline of the feed inlet of the stable material barrel 1, the pipeline between the centrifuge 2 and the thickening system 3, the pipeline between the thickening system 3 and the filter press feeding barrel 4, the pipeline between the filter press feeding barrel 4 and the filter press 5, the pipeline between the thickening system 3 and the first kneading machine 6, the pipeline between the first kneading machine 6 and the fine grinder 7, the pipeline between the first kneading machine 6 and the second kneading machine 9, the pipeline between the fine grinder 7 and the superfine grinder 8, and the pipeline between the superfine grinder 8 and the second kneading machine 9 respectively, for pumping liquid to be transported through the pipeline to the next equipment.

[0019] The working principle of the system for preparing high-concentration coal water slurry from pipeline transported coal slurry is as follows:

[0020] The pipe-conveyed coal slurry is conveyed by a conveying pump to the stabilizing barrel 1, and the pipe-conveyed coal slurry in the stabilizing barrel 1 flows into the centrifuge 2 for centrifugal dewatering. The coarse particles after centrifugal dewatering are recovered by the centrifuge 2 into centrifugal coarse coal, which is conveyed by a quantitative feeder to the second kneading mixer 9 for preparation of high-concentration coal water slurry. The fine particles after centrifugal dewatering are conveyed by a conveying pump to the thickening system 3 through a pipeline for settlement thickening, and the settlement can also be assisted by adding coagulants, flocculants and other reagents.

[0021] The supernatant after the centrifugal liquid is thickened by the thickening system 3 is deeply treated by entering the water treatment system 10 through overflow. Part of the thickened underflow is conveyed by a conveying pump to the filter press feeding barrel 4 through a pipeline, and then conveyed by a conveying pump to the filter press 5 for pressure filtration, to produce pressure filtration fine coal, which is conveyed by a quantitative feeder to the first kneading mixer 6 for preparation of kneading slurry. Another part of the thickened underflow is directly conveyed by a conveying pump to the first kneading mixer 6 for recovery and preparation of kneading slurry. In order to reduce the conveying resistance and improve the stability of the slurry, an additive can be added during preparation of the high-concentration coal water slurry to ensure that the high-concentration coal water slurry has good rheological properties during conveying. The additive is conveyed by an additive pump from an additive tank 11 to the first kneading mixer 6, and kneaded with the pressure filtration fine coal and the thickener underflow to prepare the kneading slurry.

[0022] Part of the kneading slurry is conveyed by a conveying pump to the fine grinder 7 for grinding into fine slurry, and then conveyed to the ultrafine grinder 8 for grinding into ultrafine slurry. The ultrafine slurry is conveyed by a conveying pump to the second kneading mixer 9, and is strongly kneaded with the centrifugal coarse coal, another part of the kneading slurry and the additive, to prepare the high-concentration coal water slurry, which is then output for use.

[0023] The system for preparing high-concentration coal water slurry from pipe-conveyed coal slurry provided by the utility model uses two-stage kneading mixers to fully mix and uniformly mix the centrifugal coarse coal, the pressure filtration fine coal and the thickener underflow, which can effectively prevent the high-concentration coal water slurry from containing lumps, so as to prevent the rheological properties of the slurry from being deteriorated.

[0024] Example 1

[0025] The system for preparing high-concentration coal water slurry from pipe-conveyed coal slurry provided by the embodiment comprises a centrifuge 2, a thickening system 3, a water treatment system 10, a filter press 5, a first kneading mixer 6, a second kneading mixer 9, a fine grinder 7, an ultrafine grinder 8, an additive tank 11 and a conveying pump. Figure 1As shown, the system comprises a centrifuge 2, the discharge outlet of the centrifuge 2 is connected to the feed inlet of a concentration system 3 through a pipeline; the feed inlet of the centrifuge 2 is connected to the discharge outlet of a stabilizing tank 1 through a pipeline, the feed inlet of the stabilizing tank 1 is connected to the pipeline for transporting coal slurry; the discharge outlet of the concentration system 3 is connected to the feed inlets of a filter press feed tank 4 and a first kneader 6 through pipelines respectively; the discharge outlet of the filter press feed tank 4 is connected to the feed inlet of a filter press 5 through a pipeline; the discharge outlet of the filter press 5 is connected to the feed inlet of the first kneader 6 through a belt; the discharge outlet of the first kneader 6 is connected to the feed inlets of a fine grinder 7 and a second kneader 9 through pipelines respectively; the discharge outlet of the fine grinder 7 is connected to the feed inlet of a superfine grinder 8 through a pipeline; the discharge outlet of the superfine grinder 8 is connected to the feed inlet of the second kneader 9 through a pipeline, and the feed inlet of the second kneader 9 is also connected to the discharge outlet of the centrifuge 2 through a belt. The discharge outlet of the second kneader 9 is connected to a slurry outlet pipeline.

[0026] Example 2

[0027] The system for preparing high-concentration coal water slurry from the coal slurry transported by pipeline provided in this embodiment is as shown in Figure 1 As shown, the system comprises a centrifuge 2, the discharge outlet of the centrifuge 2 is connected to the feed inlet of a concentration system 3 through a pipeline; the feed inlet of the centrifuge 2 is connected to the discharge outlet of a stabilizing tank 1 through a pipeline, the feed inlet of the stabilizing tank 1 is connected to the pipeline for transporting coal slurry; the discharge outlet of the concentration system 3 is connected to the feed inlets of a filter press feed tank 4 and a first kneader 6 through pipelines respectively; the discharge outlet of the concentration system 3 is also connected to a water treatment system 10 through a pipeline. The discharge outlet of the filter press feed tank 4 is connected to the feed inlet of a filter press 5 through a pipeline; the discharge outlet of the filter press 5 is connected to the feed inlet of the first kneader 6 through a belt; the discharge outlet of the first kneader 6 is connected to the feed inlets of a fine grinder 7 and a second kneader 9 through pipelines respectively; the discharge outlet of the fine grinder 7 is connected to the feed inlet of a superfine grinder 8 through a pipeline; the discharge outlet of the superfine grinder 8 is connected to the feed inlet of the second kneader 9 through a pipeline, and the feed inlet of the second kneader 9 is also connected to the discharge outlet of the centrifuge 2 through a belt. The discharge outlet of the second kneader 9 is connected to a slurry outlet pipeline.

[0028] The feed inlets of the first kneader 6 and the second kneader 9 are respectively connected to an additive tank 11 through pipelines.

[0029] Example 3

[0030] The system for preparing high-concentration coal water slurry from the coal slurry transported by pipeline provided in this embodiment is as shown in Figure 1As shown, the centrifuge 2 is connected to the concentrate system 3 through a pipe connected to the outlet of the centrifuge 2; the centrifuge 2 is connected to the stabilizing barrel 1 through a pipe connected to the outlet of the stabilizing barrel 1, and the inlet of the stabilizing barrel 1 is connected to the pipe for transporting coal slurry; the outlet of the concentrate system 3 is connected to the inlet of the filter press feeding barrel 4 and the first kneading mixer 6 through pipes; the outlet of the concentrate system 3 is also connected to the water treatment system 10 through a pipe. The outlet of the filter press feeding barrel 4 is connected to the inlet of the filter press 5 through a pipe; the outlet of the filter press 5 is connected to the inlet of the first kneading mixer 6 through a belt; the outlet of the first kneading mixer 6 is connected to the inlet of the fine grinding machine 7 and the second kneading mixer 9 through pipes; the outlet of the fine grinding machine 7 is connected to the inlet of the ultra-fine grinding machine 8 through a pipe; the outlet of the ultra-fine grinding machine 8 is connected to the inlet of the second kneading mixer 9 through a pipe, and the inlet of the second kneading mixer 9 is also connected to the outlet of the centrifuge 2 through a belt. The outlet of the second kneading mixer 9 is connected to a pipe for discharging slurry.

[0031] The inlet of the first kneading mixer 6 and the inlet of the second kneading mixer 9 are respectively connected to an additive tank 11 through pipes. An additive pump is arranged on the pipe between the first kneading mixer 6 and the additive tank 11, and on the pipe between the second kneading mixer 9 and the additive tank 11.

[0032] A conveying pump is arranged on the pipe connected to the inlet of the stabilizing barrel 1, the pipe between the centrifuge 2 and the concentrate system 3, the pipe between the concentrate system 3 and the filter press feeding barrel 4, the pipe between the filter press feeding barrel 4 and the filter press 5, the pipe between the concentrate system 3 and the first kneading mixer 6, the pipe between the first kneading mixer 6 and the fine grinding machine 7, the pipe between the first kneading mixer 6 and the second kneading mixer 9, the pipe between the fine grinding machine 7 and the ultra-fine grinding machine 8, and the pipe between the ultra-fine grinding machine 8 and the second kneading mixer 9, and the conveying pump is a centrifugal slurry pump.

[0033] A quantitative feeder is arranged on the belt between the filter press 5 and the first kneading mixer 6, and on the belt between the centrifuge 2 and the second kneading mixer 9.

Claims

1. A system for preparing high concentration coal water slurry from pipe coal slurry, characterized by, The centrifuge (2) is connected with the feeding port of the concentration system (3) through a pipeline; the feeding port of the concentration system (3) is connected with the feeding port of the filter press feeding barrel (4) and the first kneading mixer (6) through a pipeline respectively; the feeding port of the filter press feeding barrel (4) is connected with the feeding port of the filter press (5) through a pipeline; the feeding port of the filter press (5) is connected with the feeding port of the first kneading mixer (6) through a belt; the feeding port of the first kneading mixer (6) is connected with the feeding port of the fine grinder (7) and the second kneading mixer (9) through a pipeline respectively; the feeding port of the fine grinder (7) is connected with the feeding port of the superfine grinder (8) through a pipeline; the feeding port of the superfine grinder (8) is connected with the feeding port of the second kneading mixer (9) through a pipeline, and the feeding port of the second kneading mixer (9) is also connected with the feeding port of the centrifuge (2) through a belt.

2. The system for preparing high concentration coal water slurry from coal slurry pipeline according to claim 1, wherein, The feeding port of the centrifuge (2) is connected with the feeding port of the stable material barrel (1) through a pipeline, and the feeding port of the stable material barrel (1) is connected with the pipeline for transporting coal slurry; the feeding port of the second kneading mixer (9) is connected with a slurry outlet pipeline.

3. The system for preparing high concentration coal water slurry from coal slurry pipeline according to claim 1, wherein, The feeding port of the concentration system (3) is also connected with a water treatment system (10) through a pipeline.

4. The system for preparing high concentration coal water slurry from coal slurry pipeline according to claim 1, wherein, The feeding port of the first kneading mixer (6) and the feeding port of the second kneading mixer (9) are connected with an additive tank (11) through a pipeline respectively.

5. The system for preparing high concentration coal water slurry from coal slurry pipeline according to claim 4, wherein, An additive pump is arranged on the pipeline between the first kneading mixer (6) and the additive tank (11) and on the pipeline between the second kneading mixer (9) and the additive tank (11).

6. The system for preparing high concentration coal water slurry from coal slurry pipeline according to claim 2, wherein, A conveying pump is arranged on the pipeline of the feeding port of the stable material barrel (1), the pipeline between the centrifuge (2) and the concentration system (3), the pipeline between the concentration system (3) and the filter press feeding barrel (4), the pipeline between the filter press feeding barrel (4) and the filter press (5), the pipeline between the concentration system (3) and the first kneading mixer (6), the pipeline between the first kneading mixer (6) and the fine grinder (7), the pipeline between the first kneading mixer (6) and the second kneading mixer (9), the pipeline between the fine grinder (7) and the superfine grinder (8), and the pipeline between the superfine grinder (8) and the second kneading mixer (9) respectively.

7. The system for preparing high concentration coal water slurry from coal slurry pipeline according to claim 1, wherein, A quantitative feeder is arranged on the belt between the filter press (5) and the first kneading mixer (6) and on the belt between the centrifuge (2) and the second kneading mixer (9) respectively.

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