Pulse suspension stirring system for desulfurization wastewater zero discharge concentration tower

Abstract

The utility model provides a pulse suspension stirring system for a desulfurization wastewater zero-discharge concentration tower, and relates to the technical field of desulfurization wastewater zero-discharge equipment. The pulse suspension stirring system comprises a concentration tower pulp pool and a pulse suspension pipe network, and the concentration tower pulp pool, a high-position suction inlet and a high-position suction inlet electric stop valve are arranged, so that the overall service life of the system is prolonged, and meanwhile, the energy consumption is reduced; the system is provided with two pulse suspension pumps, one pulse suspension pump is used for conveying and one pulse suspension pump is used for standby, electric valves are arranged in front of and behind the pumps, when one pump breaks down, the other pump can be switched immediately, normal operation of the system is guaranteed, the interior of a slurry pool is always in a uniform state, and the influence of deposition on measurement precision is avoided; the whole pulse suspension pipe network is reasonable in arrangement, the increase of the number of the nozzles can cover a larger spraying area, the total flow of the pulse suspension pump is not increased, the phenomenon of local pressure head loss caused by formation of a vortex area during spraying of a high-flow nozzle is avoided, and the energy loss is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to desulfurization wastewater zero emission equipment technical field especially, relates to a kind of for the pulse suspension stirring system of desulfurization wastewater zero emission concentration tower. BACKGROUND

[0002] In the field of desulfurization wastewater zero emission, heat method concentration is a common means of reducing, mainstream heat method concentration includes multi-effect low-temperature flash evaporation technology and low-temperature bypass concentration tower technology.

[0003] Traditional multi-effect low-temperature flash evaporation technology needs to pretreat the inlet water to ensure that the equipment is not scaled, and in recent years, a low-temperature flash evaporation technology that does not require pretreatment has been developed, but the concentration ratio of this technology is generally 3-5 times, and if it exceeds this value, there is still some risk in operation.

[0004] Low-temperature bypass concentration tower technology is a technology that uses the low-temperature flue gas waste heat after electric dust removal to concentrate and reduce desulfurization wastewater, without the need to introduce steam as a heat source, saving the operating costs of the owner. At the same time, it has been proven through practice that the concentration ratio of this technology can reach 10 times, and the chloride ion concentration of the concentrated slurry can be concentrated to 300,000 mg / L at the highest, improving the efficiency of wastewater concentration and reduction.

[0005] The existing pulse suspension equipment still has the following problems when in use:

[0006] 1. The slurry in the slurry pool of the concentration tower has high turbidity, and to avoid the accumulation of slurry sediment, it is necessary to ensure that the slurry is in a suspended state. The conventional method is to install a stirrer on the side wall of the concentration tower. However, the stirrer has common faults such as impeller corrosion and wear, mechanical seal failure, and large maintenance workload during operation.

[0007] 2. The pulse suspension system can meet the long-term operation requirements of the concentration tower system, but the traditional pulse suspension system only has one suction inlet at the bottom of the tower wall. When the system is initially started, the slurry in the slurry pool is in an uneven state, and at this time, a large amount of suspended solids will flow into the pulse suspension pump, causing the pump inlet pipe to be blocked and affecting the normal operation of the system.

[0008] 3. The conventional pulse suspension system has a radial arrangement of one main pipe and small branch pipes, and only one nozzle is provided on each pipe. The flow rate of a single nozzle is 150 m3 / h. This arrangement still has dead zones in the tower cross-section, causing the deposition of suspended solids and affecting the measurement of liquid level and density.

[0009] To optimize the operation effect of the concentration tower system and ensure the uniformity of the slurry in the slurry pool, it is necessary to optimize the pulse suspension system.

[0010] Therefore, the utility model provides a pulse suspension stirring system for a desulfurization wastewater zero emission concentration tower. UTILITY MODEL CONTENTS

[0011] The utility model discloses a pulse suspension stirring system for desulfurization wastewater zero emission concentration tower.

[0012] In order to realize above-mentioned purpose, the utility model adopts the following technical scheme: a pulse suspension stirring system for desulfurization wastewater zero emission concentration tower, the pulse suspension stirring system includes concentration tower pulp pool and pulse suspension pipe network, the pulse suspension pipe network is located inside concentration tower pulp pool,

[0013] The high-level suction inlet is located at the inside one-half liquid level of the concentration tower pulp pool, and the low-level suction inlet is located at the bottom of the concentration tower pulp pool.

[0014] The inside of the concentration tower pulp pool is provided with the pulse suspension pipe network, the pulse suspension pipe network includes a radial main pipe and an annular pipe, the inside of the pulse suspension pipe network is provided with the annular pipe, the inside of the annular pipe is provided with the radial main pipe penetrating through the pulse suspension pipe network, the upper and lower sides of the radial main pipe are provided with nozzles, which spray towards the bottom of the concentration tower pulp pool through the pulse suspension pipe network, and one side of the radial main pipe is welded to the tower wall of the concentration tower pulp pool.

[0015] As a preferred embodiment, the outside of the high-level suction inlet is provided with a high-level suction inlet electric cut-off valve, and the outside of the low-level suction inlet is provided with a low-level suction inlet electric switching valve, the high-level suction inlet electric cut-off valve is used for controlling the opening and closing of the high-level suction inlet, and the low-level suction inlet electric switching valve is used for controlling the corresponding opening and closing of the low-level suction inlet, so that the opening and closing can be conveniently and uniformly managed.

[0016] The low-level suction inlet electric switching valve is used for controlling the corresponding opening and closing of the low-level suction inlet, so that the opening and closing can be conveniently and uniformly managed.

[0017] As a preferred embodiment, one end of the high-level suction inlet is provided with a connecting pipeline, one end of the connecting pipeline is connected to the first pulse suspension pump, and the other end of the connecting pipeline is connected to the second pulse suspension pump, the concentration tower pulp pool, the first pulse suspension pump and the second pulse suspension pump are connected through the connecting pipeline, one end of the first pulse suspension pump is provided with a first outlet branch pipe, the other end of the first pulse suspension pump is provided with a first inlet branch pipe, and the outside of the first outlet branch pipe and the first inlet branch pipe is provided with an electric valve.

[0018] The concentration tower pulp pool, the first pulse suspension pump and the second pulse suspension pump are connected through the connecting pipeline.

[0019] As a preferred embodiment, one end of the second pulse suspension pump is provided with a second outlet branch pipe, the other end of the second pulse suspension pump is provided with a second inlet branch pipe, and the outer sides of the second outlet branch pipe and the second inlet branch pipe are provided with electric valves of the same structure, the first pulse suspension pump and the second pulse suspension pump are configured, one of the two pumps is used and the other is standby, and the electric valves are arranged on the inlet and outlet branch pipes of each pump, so that the two pumps can be switched and operated at any time. 3 / h.

[0020] The technical effects of the further scheme are that the first pulse suspension pump and the second pulse suspension pump are configured, one of the two pumps is used and the other is standby, and the electric valves are arranged on the inlet and outlet branch pipes of each pump, so that the two pumps can be switched and operated at any time.

[0021] Compared with the prior art, the advantages and positive effects of the utility model are that,

[0022] When the low-temperature flue gas concentration system is stopped, the pulse suspension system can also be stopped when the concentrated tower slurry is not emptied, and the speed is faster and the load is smaller when it is started again, so that the problems of broken traditional mixer blades, easy wear and corrosion of bearings are overcome, the overall life of the system is improved, and the energy consumption is reduced.

[0023] The system is provided with two pulse suspension pumps, one of which is used and the other is standby, and the front and rear of the pumps are provided with electric valves, so that when one pump fails, the other pump can be switched to ensure normal operation of the system, and the slurry pool is always in a uniform state, avoiding the influence of deposition on the measurement accuracy.

[0024] The overall pulse suspension pipe network is reasonably arranged, the increase in the number of nozzles can cover a larger jet area, the central symmetrical ring structure and the space inclined nozzles can achieve a certain counter effect, the turbulence of the slurry is enhanced, and since the nozzles are all solid cone structures, the total flow of the pulse suspension pump is not increased, and the phenomenon of local pressure loss caused by vortex area formed by large-flow nozzles is avoided, effectively reducing the energy loss. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 A pulse suspension flow chart of a pulse suspension stirring system for a desulfurization wastewater zero discharge concentration tower is provided.

[0026] Fig. 2 A pulse suspension pipe network schematic diagram of a pulse suspension stirring system for a desulfurization wastewater zero discharge concentration tower is provided.

[0027] Legend:

[0028] 1. Concentration tower slurry pool;

[0029] 2. High suction inlet;

[0030] 3. High suction inlet electric cut-off valve;

[0031] 4. Low suction inlet;

[0032] 5. Low suction inlet electric cut-off valve;

[0033] 6. First pulse suspension pump;

[0034] 7. Second pulse suspension pump;

[0035] 8. Pulse suspension pipe network;

[0036] 9. Radial main pipe;

[0037] 10. Annular pipe;

[0038] 11. Nozzle. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0040] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term "arrangement", "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication, for the ordinary skilled in the art, the above-mentioned term can be understood according to the specific circumstances the specific meaning in the utility model.

[0042] The utility model will be further described below with reference to the drawings and specific embodiments.

[0043] As Figs. 1-2 Indicated, the embodiment provides a kind of technical scheme: a kind of pulse suspension stirring system for desulfurization wastewater zero discharge concentration tower, pulse suspension stirring system includes concentration tower pulp pool 1 and pulse suspension pipe network 8, pulse suspension pipe network 8 is located inside concentration tower pulp pool 1;High-level suction inlet 2 is opened on the pool wall of concentration tower pulp pool 1, low-level suction inlet 4 is opened on the pool wall of concentration tower pulp pool 1, high-level suction inlet 2 is located at the inside one-half liquid level of concentration tower pulp pool 1, low-level suction inlet 4 is located at the bottom of concentration tower pulp pool 1;Pulse suspension pipe network 8 is installed in the inside of concentration tower pulp pool 1, pulse suspension pipe network 8 includes radial main pipe 9 and annular pipe 10, annular pipe 10 is installed in the inside of pulse suspension pipe network 8, radial main pipe 9 is installed in the inside of annular pipe 10, penetrates pulse suspension pipe network 8, nozzle 11 is installed on the upper and lower sides of radial main pipe 9, is sprayed to the bottom of concentration tower pulp pool 1 by pulse suspension pipe network 8, one side of radial main pipe 9 is welded and connected with the tower wall of concentration tower pulp pool 1, two pulse suspension system suction inlets are opened on the pool wall of concentration tower pulp pool 1, respectively high-level suction inlet 2 and low-level suction inlet 4, high-level suction inlet is located at the 1 / 2 liquid level of concentration tower pulp pool 1, low-level suction inlet is located at the bottom of pulp pool, when pulse suspension first start or system long time stop and start again, first open high-level suction inlet electric cut-off valve 3, extract supernatant in pulp pool from high-level suction inlet 2 by pulse suspension pump, close electric valve 3 after running for a period of time, open low-level suction inlet 4 electric cut-off valve 5, switch to low-level suction inlet 4 operation.

[0044] More further, as Figs. 1-2 Indicated: high-level suction inlet 2 outside is equipped with high-level suction inlet electric cut-off valve 3, low-level suction inlet 4 outside is equipped with low-level suction inlet electric switch valve 5, high-level suction inlet electric cut-off valve 3 is used to control high-level suction inlet 2 opening and closing, low-level suction inlet electric switch valve 5 is used to control low-level suction inlet 4 corresponding opening and closing, it is convenient to manage opening and closing.

[0045] There are still problems in the above scheme, as Fig. 2As shown: in this scheme, one end of the high suction inlet 2 is provided with a connecting pipeline, one end of the connecting pipeline is connected with the first pulse suspension pump 6, the other end of the connecting pipeline is connected with the second pulse suspension pump 7, the concentrated tower slurry pool 1, the first pulse suspension pump 6 and the second pulse suspension pump 7 are connected and processed through the connecting pipeline, one end of the first pulse suspension pump 6 is provided with a first outlet branch pipe, the other end of the first pulse suspension pump 6 is provided with a first inlet branch pipe, and the outer sides of the first outlet branch pipe and the first inlet branch pipe are both provided with electric valves.

[0046] The above scheme also has problems, such as Fig. 2 As shown: in this scheme, one end of the second pulse suspension pump 7 is provided with a second outlet branch pipe, the other end of the second pulse suspension pump 7 is provided with a second inlet branch pipe, the outer sides of the second outlet branch pipe and the second inlet branch pipe are both provided with electric valves of the same structure, the first pulse suspension pump 6 and the second pulse suspension pump 7 are configured, one of the two pumps is used and one is reserved, and electric valves are arranged on the inlet and outlet branch pipes of each pump, so that the two pumps can be switched and operated at any time, the outer side and the inner side of the annular pipe 10 are both provided with nozzles 11, the outer side and the inner side nozzles 11 are not on the same horizontal plane, but are both at a certain angle with the horizontal plane, each nozzle 11 is a solid cone nozzle 11, and the flow of a single nozzle 11 is 20m 3 / h.

[0047] Working principle:

[0048] As shown: Figs. 1-2

[0049] Two pulse suspension system suction inlets are opened on the pool wall of the concentrated tower slurry pool 1, which are high suction inlet 2 and low suction inlet 4, the high suction inlet is located at the 1 / 2 liquid level of the concentrated tower slurry pool 1, and the low suction inlet is located at the bottom of the slurry pool.

[0050] When the pulse suspension system is started for the first time or restarted after a long time of shutdown, the high suction inlet electric cut-off valve 3 is opened first.

[0051] The pulse suspension pump first draws the supernatant in the slurry pool from the high suction inlet 2, and after a period of operation, the electric valve 3 is closed and the low suction inlet 4 electric cut-off valve 5 is opened, and the operation is switched to the low suction inlet 4.

[0052] The first pulse suspension pump 6 and the second pulse suspension pump 7 are configured, one of the two pumps is used and one is reserved, and electric valves are arranged on the inlet and outlet branch pipes of each pump, so that the two pumps can be switched and operated at any time.

[0053] After the slurry in the slurry pool is pumped out by the pulse suspension pump, it is sprayed to the bottom of the concentrated tower slurry pool 1 through the pulse suspension pipe network 8.

[0054] The pulse suspension pipe network 8 is composed of a radial main pipe 9, an annular pipe 10 and a nozzle 11. ​

[0055] The radial main pipe 9 is connected with the wall of the concentration tower pulp pool 1 at one side and connected with the connecting pipe at the other side. The annular pipe 10 has a diameter of 2 / 3 of the diameter of the concentration tower, and is composed of two half annular pipes. The two ends of each half annular pipe are communicated with the radial main pipe 9.

[0056] A nozzle 11 is installed on the upper and lower sides of the radial main pipe 9, i.e. the top view direction. The outer side and the inner side of the annular pipe 10 are both provided with nozzles 11.

[0057] The outer side and the inner side nozzles 11 are not in the same horizontal plane, but are at a certain angle with the horizontal plane. Each nozzle 11 is a solid cone nozzle. The flow of a single nozzle 11 is about 20-40 m 3 / h.

[0058] The above is only the preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied in other fields. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application still belong to the protection scope of the technical scheme of the present application.

Claims

1. A pulse suspension stirring system for a zero-discharge concentration tower for desulfurization wastewater, characterized in that, The pulse suspension stirring system includes a thickening tower slurry tank (1) and a pulse suspension pipeline (8), wherein the pulse suspension pipeline (8) is located inside the thickening tower slurry tank (1); The thickening tower slurry tank (1) has a high-level suction port (2) on its wall and a low-level suction port (4) on its wall. The high-level suction port (2) is located at half the liquid level inside the thickening tower slurry tank (1), and the low-level suction port (4) is located at the bottom of the thickening tower slurry tank (1). The slurry tank (1) of the thickening tower is equipped with a pulse suspension pipe network (8). The pulse suspension pipe network (8) includes a radial main pipe (9) and an annular pipe (10). The annular pipe (10) is installed inside the pulse suspension pipe network (8). The radial main pipe (9) that penetrates the pulse suspension pipe network (8) is installed inside the annular pipe (10). Nozzles (11) are installed on both the upper and lower sides of the radial main pipe (9) and spray the slurry tank (1) to the bottom of the thickening tower through the pulse suspension pipe network (8). One side of the radial main pipe (9) is welded to the tower wall of the thickening tower (1).

2. The pulse suspension stirring system for a zero-discharge concentration tower for desulfurization wastewater according to claim 1, characterized in that: An electric shut-off valve (3) for the high-level suction port (2) is installed on the outside of the high-level suction port (2).

3. The pulse suspension stirring system for a zero-discharge concentration tower for desulfurization wastewater according to claim 1, characterized in that: A low-position suction port electric switching valve (5) is installed on the outside of the low-position suction port (4).

4. The pulse suspension stirring system for a zero-discharge concentration tower for desulfurization wastewater according to claim 1, characterized in that: A connecting pipe is installed at one end of the high-position suction port (2).

5. The pulse suspension stirring system for a zero-discharge concentration tower for desulfurization wastewater according to claim 4, characterized in that: One end of the connecting pipe is connected to the first pulse suspension pump (6), and the other end of the connecting pipe is connected to the second pulse suspension pump (7).

6. The pulse suspension stirring system for a zero-discharge concentration tower for desulfurization wastewater according to claim 5, characterized in that: The first pulse suspension pump (6) has a first outlet branch pipe installed at one end and a first inlet branch pipe installed at the other end.

7. The pulse suspension stirring system for a zero-discharge concentration tower for desulfurization wastewater according to claim 5, characterized in that: The second pulse suspension pump (7) has a second outlet branch pipe installed at one end and a second inlet branch pipe installed at the other end.

8. The pulse suspension stirring system for a zero-discharge concentration tower for desulfurization wastewater according to claim 7, characterized in that: The second outlet branch pipe and the second inlet branch pipe are both equipped with electric valves of the same structure on their outer sides.

9. The pulse suspension stirring system for a zero-discharge concentration tower for desulfurization wastewater according to claim 1, characterized in that: The annular tube (10) is equipped with nozzles (11) on both the outer and inner sides. The outer and inner nozzles (11) are not on the same horizontal plane, but are at a certain angle to the horizontal plane.

10. The pulse suspension stirring system for a zero-discharge concentration tower for desulfurization wastewater according to claim 9, characterized in that: Each of the nozzles (11) is a solid cone nozzle (11).

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