JPH0975949A - Water treatment facility for unloading coal equipment - Google Patents

Abstract

(57) [Abstract] [Problem] To prevent the coal in the coal yard from getting wet even when heavy rain falls. SOLUTION: Rainwater or the like that has fallen on a coal storage yard 29 is drained to drainage storage tanks 31 and 32. Then, when heavy rainfall exceeding the allowable amount in the drainage storage tanks 31 and 32 falls, the drainage collected in the drainage storage tanks 31 and 32 is guided to the neutralization tank 45 and neutralized, and the drainage neutralized in the neutralization tank 45 is removed. Agglomeration equipment 56,
59, the solid suspension such as coal powder is coagulated and separated, and the supernatant water after the solid suspension is separated by the coagulation equipment 56, 59 is guided to the drainage filtration equipment 67 to be filtered, and the wastewater filtration equipment 67 is provided.
The treated water purified in (3) can be discharged to the outside of the system through the outside discharge channel 83.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment facility for unloading coal equipment.

[0002]

2. Description of the Related Art FIG. 3 shows an outline of an unloading coal facility for storing coal.

First, the coal unloaded from the ship 1 docked on the quay wall using the unloader 2 is loaded with a conveyor 3, a transfer building 4, a transfer conveyor 5, a transfer building 6, a transfer conveyor 7, and a boarding conveyor. The first pile 13 or the second pile 14 of the coal yard 12 is sent from the transfer building 11 to the transfer conveyor 11 via the transfer building 8, the transfer conveyor 9, and the transfer building 10 by a stacker (not shown). It is dropped into and stored in coal.

Alternatively, the transfer conveyor 1 from the transit building 8
5 is sent to the third pile 16 of the coal yard 12 from the carry-in conveyor 15 by a stacker (not shown) to store the coal.

Then, the coal stored in the first pile 13 or the second pile 14 of the coal storage yard 12 is taken out onto the carry-out conveyor 17 by using a reclaimer (not shown),
From the transfer conveyor 17 to the transfer building 10, the transfer conveyor 18, the transfer building 8, the transfer conveyor 19, the transfer building 6,
It is sent to the boiler equipment 21 via the carry-out conveyor 20, and is used for power generation in the boiler equipment 21.

Alternatively, the coal stored in the third pile 16 of the coal storage yard 12 is taken out onto the carry-out conveyor 22 by using a reclaimer (not shown), and from the carry-out conveyor 22, the transfer building 8, the carry-out conveyor 19, It is sent to the boiler equipment 21 via the transit building 6 and the unloading conveyor 20, and is used for power generation in the boiler equipment 21.

[0007] Then, the rainwater that has fallen to the coal storage yard 12 during rainy weather is sent to the water treatment facility 23 provided near the coal storage yard 12, and is treated in the water treatment facility 23.

As shown in FIG. 4, the water treatment facility 23 includes two sets of drainage storage tanks 24, 25 connected to the coal storage 12 via pumps (not shown), and the drainage storage tanks 24, 2 respectively.
5 is connected to the replenishment water tank 26, and the rainwater that has fallen on the coal storage yard 12 is drained to one side of two sets of drainage storage tanks 24, 25 by a pump (not shown). In the process of expanding the inside of 25 from one side to the other side, the coal powder that has been flushed with the wastewater is naturally settled and separated, the concentration of the coal powder in the wastewater is reduced, and the wastewater with the reduced concentration of the coal powder is drained. The other side of the storage tanks 24 and 25 is made to flow to the makeup water tank 26.

[0009] Then, the drainage flowed to the makeup water tank 26 is pumped up by a pump 27 on a sunny day or the like, and is sprayed to the piles 13, 14, 16 of coal stored in the coal stock yard 12. It is used for various purposes in coal transport equipment, such as used to prevent dust from coal.

Numeral 28 is a replenishment water tank 2 when there is little rain.
It is make-up water to be supplied to No. 6.

[0011]

However, the above-mentioned conventional water treatment facilities for coal transportation equipment have the following problems.

That is, the water treatment facility 23 is designed to have a sufficient capacity according to the amount of rainfall in the area where it is installed. Since the wastewater containing the water cannot be discharged to the outside of the system, the water treatment facility 23 becomes full and cannot be discharged from the coal stock yard 12, and the coal accumulated in each pile 13, 14, 16 is flooded and wetted. was there. When the coal is so wet, the coal and the unloading conveyors 17 to 20,
22 can not be transported, or boiler equipment 21
May cause a decrease in power generation efficiency.

In view of the above situation, it is an object of the present invention to provide a water treatment facility for a unloading coal facility which does not need to wet the coal in the coal storage yard even when heavy rain falls.

[0014]

The present invention provides a drainage storage tank for receiving drainage from a coal storage yard, a neutralization tank for neutralizing the drainage stored in the drainage storage tank, and a neutralization tank A coagulation facility is added to the effluent that has been added to the coagulation agent to coagulate and separate solid suspended matter such as coal powder, and a drainage filtration facility that filters the supernatant water after the solid suspended matter is separated by the coagulation facility is installed. The present invention relates to a water treatment facility for unloading coal facility, which is provided with an outside-system discharge flow path for discharging the treated water purified by the waste water filtration facility to the outside of the system.

According to the above means, the following effects can be obtained.

That is, first, rainwater or the like that has fallen on the coal storage yard is drained to the drainage storage tank.

When heavy rainfall exceeding the allowable amount of the drainage storage tank falls, the drainage storage tank becomes full and cannot be drained from the coal yard, which may wet the coal in the coal yard. The wastewater collected in the storage tank is guided to a neutralization tank for neutralization, and the wastewater neutralized in the neutralization tank is guided to a coagulation facility to add a coagulant to coagulate and separate solid suspended matter such as coal powder, and coagulate After the solid suspended matter is separated in the equipment, the supernatant water is guided to the drainage filtration equipment for filtration, and the treated water purified by the drainage filtration equipment is discharged to the outside of the system through the outside discharge channel, thereby draining the wastewater. It is possible to prevent the wastewater of the storage tank from flowing back to the coal storage yard and the coal of the coal storage yard getting wet.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention.

Since the outline of the whole coal transportation equipment is the same as that of FIG. 3, FIG. 3 will be referred to when necessary.

One side of two sets of drainage storage tanks 31, 32 is connected to the coal storage yard 29 via a drainage channel 30 and a pump (not shown), and drainage channels 33, 34 are provided on the other side of the respective drainage storage tanks 31, 32.
The makeup water tank 35 is connected via the to form a water treatment facility 36.

The drainage storage tanks 31 and 32 may be provided with only one large capacity one, but in order to be able to continue the operation of the other while removing the sludge accumulated in one, , Two tanks with half the required capacity are provided.

In the replenishment water tank 35, a sprinkling channel 37,
A watering system 40 including a watering pump 38 and a watering nozzle 39 for watering the coal storage 29 is provided.

Incidentally, 41 is a replenishment water tank 3 when there is little rain.
5 is a replenishing water to be replenished to 5, and 65 is a pump provided in the drainage path 33 from the drainage storage tank 31 to the replenishing water tank 35.

Further, in the makeup water tank 35, a water intake passage 49,
Water intake pump 50 and each transfer building 4, 6, 8, 1 in FIG.
0, each conveyor 3, 5, 7, 9, 17-1
A cleaning nozzle 52 capable of cleaning the lower surface of the belt in the return part 51 of 9, 22 and a coal chute 53 provided in each transfer building 4, 6, 8, 10 for spraying water to prevent dust generation. A water spray cleaning system 55 having a water spray nozzle 54 is provided.

A coagulation facility 56 is provided in the water treatment facility 36, and the downstream side of the drainage channel 58 connecting between the drainage boxes 57 provided in the respective transfer buildings 4, 6, 8 and 10 is aggregated. Connect to facility 56.

The coagulation facility 56 coagulates and agitates a flocculation stirring tank 61 for adding a flocculant to the drainage from the drainage channel 58 and stirring with a stirring device 60, and a solid suspended matter such as coal powder contained in the drainage. It is composed of a coagulating sedimentation tank 62 having a large capacity for coagulating sedimentation by the coagulant mixed in the tank 61.

Further, a supernatant water circulation passage 63 for returning the supernatant water of the coagulation sedimentation tank 62 to the drainage storage tank 32 is provided above the coagulation sedimentation tank 62, and separated from the waste water at the bottom of the coagulation sedimentation tank 62. A take-out flow path 64 is provided for sending a deposit such as coal powder to the coal storage 29.

In the figure, 66 is each transfer building 4, 6, 8,
It is a pump provided in the drainage channel 58 from the drainage box 57 of 10 to the coagulation stirring tank 61.

Furthermore, the water treatment facility 36 is provided with a drainage neutralization equipment 46 having a neutralization tank 45 for neutralizing the wastewater with a neutralizing agent, and either or both of the drainage storage tanks 31 and 32 and the neutralization tank. Four
5 is connected via an intake channel 44 for drainage neutralization having a valve 42 and a pump 43.

In addition, the water treatment facility 36 is provided with a flocculation facility 59 different from the above, and the waste water neutralization facility 46 and the flocculation facility 59 are connected.

The coagulation equipment 59 coagulates a coagulation stirring tank 69 for adding a coagulant to the wastewater from the neutralization tank 45 and stirring with a stirring device 68, and a solid suspended matter such as coal powder contained in the wastewater. It is composed of a coagulating sedimentation tank 70 having a large capacity for coagulating sedimentation by the coagulant mixed in the stirring tank 69.

Further, the water treatment facility 36 has a drainage filtration facility 67.
Is provided and the flocculation equipment 59 and the drainage filtration equipment 67 are connected.

The drainage filtration equipment 67 includes a treated water tank 71 for receiving the supernatant water of the coagulating sedimentation tank 70 and a treated water tank 71.
Set of three filtration towers 72 for filtering untreated water from
To 74 and a filtered treated water tank 75 for receiving the treated water filtered by each of the filtration towers 72 to 74.

Reference numeral 76 is a neutralization water drainage channel connecting the neutralization tank 45 and the flocculation stirring tank 69, 77 is a pump provided in the neutralization water drainage channel 76, and 78 is a flocculation sedimentation tank 70. And a treated water tank 71, which is a clear water feed passage. 79
Is an untreated water feed passage connecting the treated water tank 71 and each of the filtration towers 72 to 74, 80 is a pump provided in the untreated water feed passage 79, and 81 is each of the filtration towers 72 to 74. Reference numeral 82 denotes a treated water supply passage connecting to the filtered treated water tank 75, and 82 denotes a valve provided in the treated water supply passage 81. Reference numeral 83 denotes an outside-system discharge flow path that connects the filtered water tank 75 and the outside, and 84 denotes a pump provided in the outside-system discharge flow path 83. Reference numeral 85 denotes a take-out passage provided in the lower part of the coagulating sedimentation tank 70 for sending a deposit such as coal powder separated from wastewater to the coal storage 29.

Further, a backwash system 90 is installed in the filtration towers 72-74. The backwash system 90 includes an air backwash device 87 for backwashing each filtration tower 72-74 with air from a blower 86, and each backwash tower 72-74 with the treated water in the filtration treatment water tank 75. And a backwash drainage tank 89 for receiving the backwash drainage used for the backwash.

Reference numeral 91 is a blower 86 and each of the filtration towers 72 to 7
4 is a valve for backwashing air, which is provided in the backwashing channel 91 for air. Reference numeral 93 is a backwash flow passage connecting the filtration treatment water tank 75 and the filtration towers 72 to 74, 94 is a pump provided in the backwash flow passage 93, and 95 is a valve provided in the backwash flow passage 93. . Reference numeral 96 is a backwash drainage flow passage connecting the filtration towers 72 to 74 and the backwash drainage water tank 89, 97 is a circulation flow passage connecting the backwash drainage water tank 89 and the coagulation stirring tank 69, and 98 is A pump provided in the circulation flow path 97. 99 is the backwash drainage tank 8 from the middle of the system discharge flow path 83
9 is a feed flow path for sending treated water to 9.

Next, the operation of this embodiment will be described.

The coal carried by the ship is the coal storage yard 2.
The process of being stored in No. 9 and being fed from the coal storage 29 to the boiler equipment and used in the boiler equipment is the same as in FIG.

When it rains on the coal storage yard 29, the rainwater is drained from the coal storage yard 29 to one side of two sets of drainage storage tanks 31 and 32 through a drainage channel 30 by a pump (not shown). , 32 in the process of spreading from one side to the other side, the coal powder flowed with the wastewater is naturally settled and separated, and the concentration of the coal powder in the wastewater is reduced. And drainage storage tank 3
The wastewater whose coal powder concentration has been reduced by 1, 32 is pumped up by the pump 65 from the other side of the wastewater storage tanks 31, 32,
It is sent to the makeup water tank 35 via the drainage channels 33 and 34.

The drainage collected in the makeup water tank 35 is pumped up through the sprinkling flow path 37 by the sprinkling pump 38 of the sprinkling system 40 on a sunny day or the like, and stored in the coal storage site 29 from the sprinkling nozzle 39. It is used to prevent dust generation from coal by being sprayed on each pile of coal.

Further, the wastewater collected in the makeup water tank 35 is
Water intake passage 4 by water intake pump 50 of sprinkling and washing system 55
By being pumped through 9 and sprayed from the cleaning nozzle 52, the conveyors 3, 5, 7, 9, 17, 17 to 19, provided in the respective transfer buildings 4, 6, 8, 10 of FIG. Two
It is used for cleaning the lower surface of the belt in the second return section 51. At the same time, from the watering nozzle 54 to each transfer building 4, 6,
The water is sprinkled on the coal chutes 53 provided in Nos. 8 and 10, and is used for preventing dust generation from coal falling on the coal chutes 53.

In this way, each transfer building 4, 6, 8, 10
Conveyors 3, 5, 7, 9, 17 to 19, provided in
By cleaning the lower surface of the belt in the return portion 51 of 22, it is possible to obtain a high cleaning effect on the belt. Moreover, the water used for cleaning is stored in the coal storage yard 29.
By using wastewater from the river, it becomes possible to make effective use of water resources.

Then, the conveyors 3, 5, 7, 9,
The drainage used for cleaning the lower surface of the belt in the return section 51 of 17 to 19 and 22 is the transfer building 4, 6, 8, and 10.
It is collected in the drainage box 57 provided in the and is sent from the drainage box 57 to the coagulation facility 56 by the pump 66 via the drainage channel 58.

Then, in the coagulation facility 56, the wastewater from the drainage channel 58 is introduced into the coagulation stirring tank 61, and the coagulation stirring tank 61 is fed.
The coagulant is added thereto, and the mixture is stirred and mixed by the stirrer 60, and then sent to the coagulating sedimentation tank 62 having a large capacity.

In the coagulating sedimentation tank 62, the solid suspended matter such as coal powder contained in the waste water is coagulated and precipitated by the action of the coagulant mixed in the preceding stage. Then, the supernatant water of the coagulation-sedimentation tank 62 is returned from the upper part of the coagulation-sedimentation tank 62 to the drainage storage tank 32 through the supernatant water circulation channel 63, and is circulated and reused. By passing the flocculation facility 56 in this way, it is possible to treat the waste water obtained by washing the lower surface of the belt in the return portion 51 of each of the conveyors 3, 5, 7, 9, 17 to 19, 22 without discharging it to the outside of the system. It will be possible.

Further, the return section 5 of each of the conveyors 3, 5, 7, 9, 17 to 19, 22 accumulated in the lower portion of the flocculation / sedimentation tank 62.
The sediment such as coal powder separated from the wastewater obtained by washing the lower surface of the belt in No. 1 is fed to the coal storage yard 2 through the take-out passage 64.
After being sent to 9 and dried in the coal storage 29 on a sunny day,
Used in boiler equipment.

When the coal storage 29 receives heavy rain over the allowable amount, the drainage storage tanks 31 and 32 are full and the coal storage 29 cannot be drained, and the coal stored in the coal storage 29 may be wet. There is.

Therefore, in such a case, the valve 42 of the intake channel 44 for drainage neutralization is opened and the pump 43 is driven to remove the water in the drainage storage tank 32 from the drainage neutralization facility 46 and the drainage filtration facility 6.
Try to escape to 7. This allows the drainage storage tanks 31, 3
Since the water level of No. 2 is lowered, the drainage from the coal storage yard 29 becomes possible, and the wetting of the coal stored in the coal storage yard 29 is prevented.

The water escaped from the waste water storage tank 32 first enters the neutralization tank 45 of the waste water neutralization facility 46, is neutralized by the neutralizing agent in the neutralization tank 45, and is then pumped by the pump 77. It is sent to the coagulation stirring tank 69 via the Japanese water drainage channel 76,
The flocculant is mixed in the flocculation stirring tank 69, and further fed to the flocculation / precipitation tank 70 having a large capacity, and the flocculation agent 70 mixed in the preceding stage coagulates and precipitates solid suspended matter such as coal powder contained in the wastewater. To be done.

The solid suspended matter such as coal powder coagulated and settled is sent to the coal stock yard 29 through the take-out flow path 85, and is dried in the coal stock yard 29 on a sunny day, and then used in the boiler equipment. It

On the other hand, the supernatant water of the coagulating sedimentation tank 70 is collected in the treated water tank 71 through the supernatant water supply passage 78, and from the treated water tank 71 by the pump 80 through the untreated water supply passage 79. Sent to the filtration towers 72-74, and the respective filtration towers 72-74
The treated water is filtered by and treated with almost no suspended solids such as coal powder.

The treated water thus produced is supplied to each of the filtration towers 72-
From 74 to the filtered water tank 75, the filtered water tank 7
5 is discharged to the outside of the system by the pump 84 via the outside system discharge flow path 83. In this way, the wastewater of the coal storage yard 29 can be finally discharged out of the system as clean treated water that meets the environmental standards. It is possible not to wet the coal stored in the.

When each of the filtration towers 72 to 74 is filled with suspended solids such as filtered coal powder, first, the blower 86
Is driven and air is sent through the air backwash flow passage 91 to perform air backwash of each of the filtration towers 72 to 74, and then the pump 94 is driven to filter through the backwash flow passage 93. By sending the treated water from the treated water tank 75, the respective filtration towers 72 to 74 are backwashed so that the respective filtration towers 72 to 74 are regenerated.

Floating solids such as coal powder washed out from each of the filtration towers 72 to 74 by backwashing are collected in the backwashing drainage water tank 89 through the backwashing drainage channel 96 and sent through the return channel 99. After being diluted with the treated water coming from the filtered treated water tank 75, it is sent by the pump 98 to the coagulation stirring tank 69 through the circulation flow path 97, and the coagulant is mixed in the coagulation stirring tank 69 and the coagulation sedimentation tank 70 is supplied. It is coagulated and settled, and is sent to the coal storage site 29 via the take-out flow path 85 of the coagulation sedimentation tank 70.
Used in boiler equipment after being dried in the sun on a sunny day.

The backwash can be carried out simultaneously on all of the filtration towers 72 to 74 on a sunny day or the like, but any two of the filtration towers 72 can be filtered during heavy rain while remaining the same. You can also use it by backwashing one of the units for regeneration.

FIG. 2 shows a second embodiment of the present invention.

In this embodiment, the neutralization tank 45 is provided between the drainage storage tanks 31 and 32 and the makeup water tank 35.

Reference numeral 100 is a neutralization water supply passage for connecting the neutralization tank 45 and the makeup water tank 35, and 101 is a pump provided in the neutralization water supply passage 100.

In the above embodiment, the coagulation equipment 56,
The two systems of 59 are integrated into a coagulation stirring tank 61 and a coagulation sedimentation tank 62, and the supernatant water is sent from the upper part of the coagulation sedimentation tank 62 to the drainage storage tank 31 and the makeup water tank 35. Flow paths 102 and 103 and a clear water supply flow path 104 for sending to the treated water tank 71 are provided.

Numerals 105 to 107 are supernatant water circulation flow paths 10.
2 and 103 and valves provided in the supernatant water supply passage 104.

Then, the rain falling on the coal storage 29 is discharged to the drainage storage tanks 31 and 32, sent from the drainage storage tanks 31 and 32 to the neutralization tank 45 and neutralized, and then sent to the makeup water tank 35. . Further, the water in the makeup water tank 35 used for cleaning the conveyor belt in each transfer building 4, 6, 8 and 10 is sent to the coagulation stirring tank 61 and the coagulation sedimentation tank 62, and the coagulation sedimentation tank 6
It is circulated from 2 to the drainage storage tank 31 and the makeup water tank 35 through the clear water circulation flow paths 102 and 103, and is reused.

On the other hand, when heavy rainfall exceeding the permissible amount falls, the water neutralized in the neutralization tank 45 is directly fed to the coagulation stirring tank 6
1 and the coagulation-sedimentation tank 62, and from the coagulation-sedimentation tank 62 to the drainage filtration equipment 67 via the supernatant water supply passage 104, and after being filtered and cleaned by the drainage filtration equipment 67, outside the system. Is released.

The structure other than the above is the same as that of the first embodiment, and the same effect can be obtained.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0066]

As explained above, the water treatment facility for pumping coal equipment of the present invention has an excellent effect that it is possible to prevent the coal in the coal stockyard from getting wet even when heavy rain falls. obtain.

[Brief description of drawings]

FIG. 1 is a schematic system diagram of a first embodiment of the present invention.

FIG. 2 is a schematic system diagram of a second embodiment of the present invention.

FIG. 3 is a plan view showing an outline of an entire coal transportation equipment.

FIG. 4 is a schematic system diagram of a conventional example.

[Explanation of symbols]

 29 Coal storage plant 31, 32 Drainage storage tank 35 Make-up water tank 45 Neutralization tank 56, 59 Coagulation facility 67 Drainage filtration facility 83 External release channel

Claims (1)

[Claims] 1. A drainage storage tank for receiving wastewater from a coal storage yard, a neutralization tank for neutralizing the wastewater accumulated in the drainage storage tank, and a coagulant is added to the wastewater neutralized in the neutralization tank. In addition, a flocculation facility was installed to flocculate and separate solid suspended matter such as coal powder, and a drainage filtration facility was installed to filter the supernatant water after the solid flotation was separated by the flocculation facility. A water treatment facility for unloading coal facility, which is provided with an external discharge channel for discharging treated water to the outside of the system.