Salt pan water flowing system

Abstract

The invention relates to a salt pan water flowing system which comprises a plurality of brine beach sunning ponds (10), each beach sunning pond (10) is at least provided with two water inlets (10ia and 10ib) and two water outlets (10oa and 10ob), the two water inlets (10ia and 10ib) and the two water outlets (10oa and 10ob) are formed in the water inlet ends and the water outlet ends of the beach sunning ponds (10) respectively, one water inlet (10ia and 10ib) and one water outlet (10oa and 10ob) form a group, and connecting lines of the two groups of water inlets (10ia and 10ib) and the water outlets (10oa and 10ob) are crossed. A water flowing flow adjusting device (60) used for controlling flowing of the brine is arranged at the position of a communication channel of the water outlet and the water inlet, and the flowing flow of the brine is controlled through the water flowing flow adjusting device (60).

Description

Technical Field

[0001] The invention relates to a salt field water flow system, and in particular to flow control of brine during the water flow process. Background Art

[0002] The main process of potash fertilizer production is to mine intercrystalline brine and transport it to large-scale artificial salt ponds (commonly known as salt pans), use solar energy to naturally evaporate the beach to form carnallite, and then mine the carnallite and send it to the processing workshop to produce potash fertilizer. With the gradual implementation and promotion of the potassium industry plan, the output of potassium chloride is constantly increasing, and the requirements for brine quality are higher. It is an important link for intercrystalline brine to be dried in salt pans to produce carnallite. The control of water flow process plays a vital role in the quality of brine, which directly affects the quality and mineralization of brine in the carnallite pool, and then affects the output and quality of potassium chloride produced by the processing plant.

[0003] At present, the water routes for the salt field sun-drying carnallite include single-tank route, parallel route and series route. The single-tank route is the simplest. The process flow includes brine filling, ore drying, brine drainage and ore discharge. Ore discharge consists of five parts: drainage, fish bone removal, surface making, loading and ore loading. It requires a lot of manpower and material resources, as well as expensive machinery shifts. It has the highest production cost and a long ore discharge cycle, which leads to a reduction in the salt field brine drying cycle and a reduction in the annual production of carnallite ore.

[0004] It is difficult to achieve continuity in parallel water flow, that is, the brine in the first pool can only be discharged to the second pool when it reaches a certain composition point, and the second pool can only be discharged from the salt field when it reaches the old brine point. However, the water mining ship has strict requirements on the water level of the salt field. If the water level is too high, the water mining ship will not be able to operate stably. For the safety of the dam, the water level cannot be too high. Therefore, when the brine does not reach the required composition point, brine cannot be taken in or discharged, and it is difficult to achieve continuous water flow. At the same time, parallel water flow is prone to concentrated and large-scale discharge of old brine, which has an adverse effect on the entire old brine discharge system.

[0005] When the water is flowing in series, the brine enters directly from the water inlet in the middle of the carnallite pool, and then flows out from the water outlet in the middle. The water route is short, and the brine around the salt pan cannot be replaced in time, resulting in a large difference in brine concentration in the horizontal and vertical directions, causing the overall brine evaporation in the salt pan to be low. Channels will be formed in the flow of brine, resulting in substandard discharge indicators of old brine.

[0006] In this regard, the inventor of this application has improved the water flow of the existing salt pan beach drying system. For example, in the invention patent with application number: 202010884666.3, the inventors set water inlets and water outlets at two diagonal corners of the rectangular carnallite pool, and the water inlet is connected to the water outlet of the upstream carnallite pool, and the water outlet is connected to the water inlet of the downstream carnallite pool. Each water inlet is provided with a sluice box to control the on and off of brine.

[0007] When the water flows, the water gate box on the intersection line is opened to make the brine flow along the diagonal line. The water gate boxes on the two intersection lines are switched regularly to make the brine flow alternately between the two diagonals, thereby reducing the horizontal and vertical brine concentration difference in the carnallite pool. However, this technical solution needs further improvement in reducing the brine concentration difference in the carnallite pool.

[0008] The first object of the present invention is to provide a salt pan water diversion system capable of reducing the difference in brine concentration in a carnallite pool.

[0009] The second purpose is to provide a water flow regulating device suitable for use in a salt field water flow system. Summary of the invention

[0010] The first technical solution of the present invention is a salt pan water diversion system, characterized in that it comprises a plurality of brine drying pools (10), each of the brine drying pools (10) having at least two water inlets (10ia, 10ib) and two water outlets (10oa, 10ob), the two water inlets (10ia, 10ib) and the two water outlets (10oa, 10ob) being respectively arranged at the water inlet end and the water outlet end of the brine drying pool (10), one water inlet (10ia, 10ib) and one water outlet (10oa, 10ob) forming a group, and the connecting lines of the two groups of water inlets (10ia, 10ib) and water outlets (10oa, 10ob) being in a cross shape.

[0011] The water outlet and water inlet of the beach drying pool (10) are respectively connected to the water inlet and water outlet of the upstream beach drying pool (10) to form a series water flow, and the connection points are respectively provided with water flow regulating devices (60) for controlling the flow of brine. The water flow regulating device (60) comprises: two bases (11), a mounting frame (100), a motor (300), a screw rod (15), a first guide rod (16), and a valve plate (200). The two bases (11) are respectively arranged on both sides of the brine channel. The mounting frame (100) comprises a horizontal top plate (14) and two vertical plates (13), wherein the two vertical plates (13) support the top plate (14) above the two bases (11). The motor (300) is fixedly arranged on the left side or the right side above the top plate (14). The upper end of the screw rod (15) passes through a third through hole (30) provided on the side of the top plate (14) and is fixedly connected to the rotating shaft of the motor (3); the lower end of the screw rod (15) is rotatably connected to a base (11) close to the motor (300) via a bearing (151).

[0012] The upper end of the first guide rod (16) is fixed to the top plate (14), and the lower end is fixed to the base (11) away from the motor (300). A transmission block (24) and a sliding block (23) are respectively fixed to the left and right sides of the upper end of the valve plate (200). The transmission block (24) is threadedly connected to the screw rod (15) through a screw hole (241), and the sliding block (23) is slidably connected to the first guide rod (16) through a mounting hole (231). Vertical sliding grooves (12) are respectively provided on the opposite side surfaces of the two bases (11). The valve plate (200) is installed in the two sliding grooves (12) and can slide up and down along the sliding grooves (12).

[0013] Preferably, the top surface of the base 11 is slightly higher than the highest water level of the brine.

[0014] Preferably, a slide bar (22) matching the slide groove (12) is respectively provided at the left and right ends of the valve plate (200); the slide bar (22) is respectively installed in the two slide grooves (12) and can slide up and down along the slide groove (12).

[0015] Preferably, a transverse fixing plate (131) is fixed to the inner side of the lower end of the vertical plate (13), and each fixing plate (131) is detachably fixed to the upper end of each base (11), the lower end of the screw rod (15) is rotatably connected to the fixing plate (131) close to the motor (300) via a bearing, and the lower end of the first guide rod (16) is fixed to the fixing plate (131) away from the motor (300).

[0016] Preferably, a transverse baffle (21) is provided at the upper end of the valve plate (200), vertical connecting plates (211) are provided at the left and right ends of the baffle (21), and the transmission block (24) and the sliding block (23) are fixedly connected to the two connecting plates (211), respectively.

[0017] Preferably, a second through hole (141) is provided in the middle of the top plate (14), a second guide rod (25) is provided on the upper side of the baffle plate (21), the upper end of the second guide rod (25) is inserted into the second through hole (141), and the lower end is fixedly connected to the middle of the upper side of the baffle plate (21).

[0018] Preferably, a limiting block (251) is provided at the upper end of the second guide rod (25) for preventing the second guide rod (25) from falling out of the second through hole (141).

[0019] Preferably, the motor (300) is wrapped with a protective shell (31) on the outside.

[0020] Preferably, a plurality of heat dissipation holes (32) for dissipating heat are provided at the upper end of the protective shell (31).

[0021] Preferably, a rainproof cap (33) is fixedly arranged above the protective shell (31). BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the overall schematic diagram of the salt field water system; Figure 2 It is a schematic diagram of the overall structure of the water flow regulating device; Figure 3 It is a schematic diagram of the structure of the mounting frame, motor and screw rod in the water flow regulating device; Figure 4 This is a schematic diagram of the valve plate and surrounding structure in the water flow regulating device. DETAILED DESCRIPTION

[0023] The specific implementation modes of the present invention are described below by way of examples.

[0024] Figure 1 This is the overall schematic diagram of the salt field water system. Figure 1 As shown, the salt pan water system includes four carnallite pools 10, each of which is rectangular, and a first water inlet 10ia, a first water outlet 10oa, and a second water inlet 10ib and a second water outlet 10ob are respectively arranged at two diagonal corners. Each carnallite pool has a different water level, and the water inlet and outlet of each carnallite pool 10 are connected to the upstream and downstream carnallite pools 10 respectively according to the order of water level.

[0025] That is, the first water outlet 10oa and the second water outlet 10ob of the first carnallite pool 10 at the most upstream are respectively connected with the first water inlet 10ia and the second water inlet 10ib of the second carnallite pool 10. The first water outlet 10oa and the second water outlet 10ob of the second carnallite pool 10 are respectively connected with the first water inlet 10ia and the second water inlet 10ib of the third carnallite pool 10, and so on, each carnallite 10 is connected with the upstream and downstream carnallite pools 10 through the water inlets and water outlets on the two diagonals.

[0026] The first water inlet 10ia and the second water inlet 10ib of each carnallite pool 10 and the first water outlet 10oa and the second water outlet 10ob of the most downstream carnallite pool 10 are provided with a flow regulating device 60 capable of controlling on and off. The structure of the flow regulating device 60 is described in detail below.

[0027] Therefore, by controlling the on and off of the flow regulating device 60 provided at the water inlet and the water outlet, the mineralized brine can flow alternately along the diagonal in each carnallite pool 10. For example, when the first water inlet 10ia and the first water outlet 10oa of each carnallite pool 10 are opened, and the second water inlet 10ib and the second water outlet 10ob are closed, the mineralized brine Figure 1 The solid line in the middle shows that the water flows along the diagonal of each carnallite pool 10. On the contrary, when the second water inlet 10ib and the second water outlet 10ob of each carnallite pool 10 are opened and the first water inlet 10ia and the first water outlet 10oa are closed, the mineralized brine is as follows: Figure 1 The dotted line shows that water flows along another diagonal line of each carnallite pool 10. The naming of the first water inlet 10ia, the first water outlet 10oa, the second water inlet 10ib, and the second water outlet 10ob is just for the convenience of description and has no substantial difference.

[0028] When drying carnallite, the mineralized brine in the regulating pool 50 flows in from the first water inlet 10ia of the first carnallite pool 10 at the most upstream, flows in a diagonal direction, flows out from the first water outlet 10oa to the second carnallite pool 10, flows in a diagonal direction again, flows out from the first water outlet 10oa of the second carnallite pool 10 to the third carnallite pool 10, flows in a diagonal direction again, flows out from the first water outlet 10oa of the third carnallite pool 10 to the fourth carnallite pool 10, and flows in a diagonal direction again. During the flow process, the water in the brine evaporates continuously, and carnallite is generated in the carnallite pool 10. Finally, the mineralized brine is discharged from the first water outlet 10oa in the fourth carnallite pool 10 to the mining area 30 in the form of old brine.

[0029] By regularly switching the on and off of each flow regulating device 60, the mineralizing brine can regularly switch its water route, and the brine around each carnallite pool 10 can be replaced in time to avoid uneven drying of the ore, reduce the horizontal and vertical brine concentration differences, and increase the brine evaporation rate.

[0030] In this embodiment, the brine in the mining area 30 is raw brine, which is dried for the first time in the sodium salt pool 40 to precipitate sodium salt. The brine after the first drying enters the regulating pool 50 and is dried for the second time in the regulating pool 50. The quality of the brine entering and exiting the brine is controlled to obtain mineralizing brine, namely E brine.

[0031] In the regulating tank 50, the brine composition is controlled by natural evaporation, fresh water or brine supplementation. The proportion of brine (E brine) in winter is 1.265-1.1.268, KCl% is 2.2%-2.3%, and NaCl% is 2.0%-2.2%; the proportion of brine (E brine) in summer is 1.275-1.278, KCl% is 2.5%-2.8%, and NaCl% is 2.0%-2.2%.

[0032] The mineralized brine flows in each carnallite pool 10 in sequence, and is continuously exposed to form carnallite ore for potash fertilizer production. The old brine after beach exposure is discharged from the first outlet 10oa or the first outlet 10oa of the most downstream carnallite pool 10 to the mining area 30. The specific gravity of the old brine component is greater than 1.308 in winter, and the KCl% is less than 0.3%; the specific gravity of the brine discharged in summer is greater than 1.315, and the KCl% is less than 0.3%. After the old brine enters the mining area 30, it can be dissolved with potassium to form usable raw brine, forming a green circulation mode.

[0033] As an ideal water flow form, it is best that the beach drying effects of the two are the same or similar when the water flows along different diagonals. In this way, the concentration difference of the brine in the carnallite pool 10 is minimized, and the horizontal and vertical brine concentration differences can be minimized. However, by changing the switching time to adjust the flow rate during water flow, sometimes there will be a problem of not being able to flow continuously.

[0034] The present invention adjusts the flow rate of water by setting a flow regulating device 60, so that the brine can flow continuously and have a similar beach drying effect when flowing along different diagonals, thereby reducing the horizontal and vertical differences in brine concentration.

[0035] The flow regulating devices 60 provided at the first water inlet 10ia and the second water inlet 10ib of each carnallite pool 10 and the first water outlet 10oa and the second water outlet 10ob of the fourth carnallite pool 10 at the most downstream are the same.

[0036] When the water flows, for example, according to the seasons when the two water lines flow, the flow rate of each flow regulating device 60 is adjusted, so that the mineralizing brine has roughly the same beach drying effect when flowing along different water lines, which not only reduces the horizontal and vertical brine concentration differences in each carnallite pool 10, but also enables continuous water flow.

[0037] Figure 2 The overall structural diagram of the water flow regulating device is shown in FIG. Figure 3 This is a schematic diagram of the structure of the mounting frame, motor and screw rod in the water flow regulating device.

[0038] like Figure 2 , 3 As shown, the water flow regulating device includes: two bases 11, a mounting frame 100, a motor 300, a screw rod 15, a first guide rod 16, and a valve plate 200.

[0039] The two bases 11 are respectively arranged on the left and right sides of the water inlet (outlet) of the carnallite pool 10. The top surface of the base 11 is slightly higher than the highest water surface of the brine. Figure 3As shown, it includes a horizontal top plate 14 and two vertical plates 13, and the two vertical plates 13 extend upward from the top surface of the base 11 to support the top plate 14 above the two bases 11. A horizontal fixing plate 131 is fixed to the inner side of the lower end of the vertical plate 13, and each fixing plate 131 is detachably fixed to the top surface of each base 11.

[0040] See also Figure 4 A third through hole 30 is provided on the right side of the top plate 14, a motor 300 is installed above the third through hole 30, the upper end of the screw rod 15 is fixedly connected to the rotating shaft of the motor 300, the lower end of the screw rod 15 extends to the position of the fixed plate 131, and is connected to the fixed plate 131 installed on the base 11 through a bearing 151. A first guide rod 16 is provided on the left side of the top plate 14, the upper end of the first guide rod 16 is fixed to the top plate 14, and the lower end of the first guide rod 16 is fixed to the fixed plate 131 on the base 11.

[0041] The opposite surface of each base 11 is provided with a slide groove 12, and the slide groove 12 is located on the plane where the centers of the first guide rod 16 and the screw rod 15 are located. The valve plate 200 is installed in the slide groove 12 and can slide up and down freely. Figure 4 The left and right sides of the upper end of the valve plate 200 are respectively fixed with a transmission block 24 and a slider 23 extending outward, the transmission block 24 is provided with a screw hole 241 for threaded connection with the screw rod 15, and the slider 23 is provided with a mounting hole 231 for sliding connection with the first guide rod 16. The spacing between the transmission block 24 and the slider 23 corresponds to the spacing between the screw rod 15 and the first guide rod 16.

[0042] The valve plate 200 is a square plate, and the left and right ends are respectively provided with slide bars 22 matching the slide grooves 12, and the slide bars 22 are respectively installed in the two slide grooves 12, and can slide up and down along the slide grooves 12. A horizontal baffle 21 is provided at the upper end of the valve plate 200, and vertical connecting plates 211 are respectively provided at the left and right ends of the baffle 21, and the transmission block 24 and the slider 23 are respectively fixedly connected to the two connecting plates 211. The baffle 21 can play a role in blocking brine, and can try to avoid the screw rod 15, the first guide rod 16, the transmission block 24 and the slider 23 from contacting with the brine, and prevent salt from forming on these components.

[0043] A second through hole 141 is provided in the middle of the top plate 14 , a second guide rod 25 is provided on the upper side of the baffle plate 21 , the upper end of the second guide rod 25 is inserted into the second through hole 141 , and the lower end is fixedly connected to the upper middle part of the baffle plate 21 .

[0044] A limiting block 251 is disposed at the upper end of the second guide rod 25 to prevent the second guide rod 25 from escaping from the second through hole 141 .

[0045] like Figure 2As shown, the motor 300 is wrapped with a protective shell 31, and a plurality of heat dissipation holes 32 for heat dissipation are arranged on the upper end of the protective shell 31. In actual production, if salt is formed on the left and right sides of the valve plate 200 to hinder the movement of the valve plate 200, the salt can be washed away with fresh water using a handheld water pipe, and the protective shell 31 can prevent the fresh water used for washing from splashing into the motor 300. A rain cap 33 composed of an inclined plate is fixedly arranged above the protective shell 31, which can guide rainwater to the side of the motor 300.

[0046] Therefore, when in use, the staff only needs to operate the motor 300 to make the rotating shaft of the motor 300 rotate forward or reverse, which can drive the screw 15 to rotate, so that the transmission block 24 can move upward or downward, and drive the valve plate 200 to move upward or downward. The valve plate 200 rises to open the channel to allow brine to pass (water flow), and moves downward to the lowest point to close the channel and block water flow. The flow rate during water flow can be adjusted by adjusting the upper and lower positions of the valve plate 200.

[0047] Since the motor 300 is arranged on the side of the mounting frame 1 closer to the shore, the staff can inspect and repair the motor 300 on the shore. The first guide rod 16 can help the valve plate 200 to rise and fall smoothly, and can avoid the valve plate 200 being tilted due to uneven force caused by the motor 300 and the screw rod 15 being arranged on the side of the mounting frame 100.

[0048] The first guide rod 16 and the second guide rod 25 can help the valve plate 200 to be lifted and lowered smoothly, and can prevent the valve plate 200 from being skewed due to uneven force caused by the motor 300 and the screw rod 15 being arranged on the side of the mounting frame 100.

[0049] According to the extended length of the second guide rod 25, the staff can judge the upper and lower positions of the valve plate 200, that is, the size of the water flow rate.

[0050] Since the valve plate 200 is located on the plane where the centers of the first guide rod 16 and the screw rod 15 are located, there is no torque that causes the valve plate 200 to rotate relative to the first guide rod 16 and the screw rod 15, the valve plate 200 does not need to be attached to the edge of the chute 12, and salt accumulation will not occur between the valve plate 200 and the chute 12 due to the analysis of salt in the brine.

Claims

1. Salt field water system, characterized by: The invention relates to a plurality of brine drying pools (10), each of which has at least two water inlets (10ia, 10ib) and two water outlets (10oa, 10ob), the two water inlets (10ia, 10ib) and the two water outlets (10oa, 10ob) being respectively arranged at the water inlet end and the water outlet end of the beach drying pool (10), one water inlet (10ia, 10ib) and one water outlet (10oa, 10ob) forming a group, and the connecting lines of the two groups of water inlets (10ia, 10ib) and water outlets (10oa, 10ob) forming a cross shape, The water outlet and water inlet of the beach drying pool (10) are respectively connected to the water inlet and water outlet of the upstream beach drying pool (10) to form a series water flow, and the connection points are respectively provided with water flow regulating devices (60) for controlling the flow of brine. The water flow regulating device (60) comprises: two bases (11), a mounting frame (100), a motor (300), a screw rod (15), a first guide rod (16), and a valve plate (200). The two bases (11) are respectively arranged on both sides of the brine channel. The mounting frame (100) comprises a horizontal top plate (14) and two vertical plates (13), wherein the two vertical plates (13) support the top plate (14) above the two bases (11). The motor (300) is fixedly arranged on the left side or the right side above the top plate (14). The upper end of the screw rod (15) passes through a third through hole (30) provided on the side of the top plate (14) and is fixedly connected to the rotating shaft of the motor (3); the lower end of the screw rod (15) is rotatably connected to a base (11) close to the motor (300) via a bearing (151). The upper end of the first guide rod (16) is fixed to the top plate (14), and the lower end is fixed to a base (11) away from the motor (300). A transmission block (24) and a sliding block (23) are respectively fixed on the left and right sides of the upper end of the valve plate (200). The transmission block (24) is threadedly connected to the screw rod (15) via a screw hole (241). The sliding block (23) is slidably connected to the first guide rod (16) via a mounting hole (231). A vertical slide groove (12) is respectively provided on one side surface of the two bases (11) facing each other. The valve plate (200) is installed in the two slide grooves (12) and can slide up and down along the slide grooves (12).

2. The salt field water diversion system according to claim 1, characterized in that: The top surface of the base 11 is slightly higher than the highest water level of the brine.

3. The salt field water diversion system according to claim 2, characterized in that: Slide bars (22) matching the slide grooves (12) are respectively arranged at the left and right ends of the valve plate (200); the slide bars (22) are respectively installed in the two slide grooves (12) and are capable of sliding up and down along the slide grooves (12).

4. The salt field water diversion system according to claim 2, characterized in that: A transverse fixing plate (131) is fixed to the inner side of the lower end of the vertical plate (13), and each fixing plate (131) is detachably fixed to the upper end of each base (11). The lower end of the screw rod (15) is rotatably connected to a fixing plate (131) close to the motor (300) via a bearing, and the lower end of the first guide rod (16) is fixed to a fixing plate (131) far from the motor (300).

5. The salt pan water diversion system according to claim 2, characterized in that: A transverse baffle (21) is provided at the upper end of the valve plate (200), and vertical connecting plates (211) are provided at the left and right ends of the baffle (21), respectively. The transmission block (24) and the sliding block (23) are respectively fixedly connected to the two connecting plates (211).

6. The salt field water diversion system according to claim 2, characterized in that: A second through hole (141) is provided in the middle of the top plate (14). A second guide rod (25) is provided on the upper side of the baffle plate (21); the upper end of the second guide rod (25) is inserted into the second through hole (141), and the lower end is fixedly connected to the middle portion of the upper side of the baffle plate (21).

7. The salt pan water diversion system according to claim 6, characterized in that: A limiting block (251) is provided at the upper end of the second guide rod (25) for preventing the second guide rod (25) from falling out of the second through hole (141).

8. The salt pan water diversion system according to any one of claims 1 to 7, characterized in that: The motor (300) is wrapped with a protective shell (31) on the outside.

9. The salt pan water diversion system according to claim 8, characterized in that: The upper end of the protective shell (31) is provided with a plurality of heat dissipation holes (32) for dissipating heat.

10. The salt field automatic valve plate according to claim 8, characterized in that: A rainproof cap (33) is fixedly arranged above the protective shell (31).

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