Multipurpose ammonia supply pump station
By designing a multi-purpose ammonia supply pump station, adopting a two-in-one standby pump station configuration and electric valve switching, the problems of large footprint, high cost, and inconvenient maintenance of ammonia supply pump stations have been solved, achieving the effects of space saving, cost reduction, and automatic control.
Patent Information
- Application Number
- CN202423056368.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-11
AI Technical Summary
In the existing SCR+SNCR combined denitrification technology, the ammonia supply pump station occupies a large space, has high equipment investment costs, and is inconvenient to maintain and repair, which cannot meet environmental protection requirements.
Design a multi-purpose ammonia supply pump station, adopting a two-in-one standby pump station configuration. Automatic control of ammonia solution is achieved through electric valve switching. The station integrates a first ammonia pump, a second ammonia pump, and a third ammonia pump, sharing inlet and outlet ammonia pipelines. It is also equipped with a pressure transmitter and an electromagnetic flow meter to detect ammonia flow rate and pressure.
It saves installation space, reduces operating costs, simplifies maintenance and repair, enables automatic control of SNCR and SCR ammonia injection, and improves equipment utilization efficiency.
Smart Images
Figure CN223570394U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to denitration equipment technical field, concretely relates to a multipurpose ammonia supply pump station. BACKGROUND
[0002] In order to prevent the coal combustion in boiler to produce too much NOx and pollute the environment, the coal should be handled to denitrate. Common denitration technology includes SCR (selective catalytic oxidation reduction reaction) and SNCR (selective non-catalytic oxidation reduction reaction). In actual engineering operation, single denitration technology has been unable to meet the environmental protection requirement, therefore SCR+SNCR combined denitration technology is widely applied.
[0003] The existing SCR+SNCR combined denitration technology, SNCR denitration system and SCR denitration system are separately equipped with ammonia supply pump station, one ammonia supply pump station is configured with two ammonia pumps, one is used and one is spare. Two ammonia supply pump stations occupy large space, ammonia pump use efficiency is low, equipment and pipeline valve investment cost is high, and maintenance and repair are inconvenient. SUMMARY
[0004] In order to solve the above problems, the utility model provides a multipurpose ammonia supply pump station.
[0005] The utility model adopts the technical scheme:
[0006] A multipurpose ammonia supply pump station, including first ammonia water pump, second ammonia water pump and third ammonia water pump, the import of first ammonia water pump, second ammonia water pump and third ammonia water pump is connected with the import ammonia water main pipe through first import ammonia water branch pipe, second import ammonia water branch pipe and third import ammonia water branch pipe in common, is equipped with ammonia water inlet pipe on the import ammonia water main pipe;The export of first ammonia water pump, second ammonia water pump and third ammonia water pump is connected with the export ammonia water main pipe through first export ammonia water branch pipe, second export ammonia water branch pipe and third export ammonia water branch pipe in common, is equipped with first ammonia water export pipe, second ammonia water export pipe, first ammonia water backflow line and second ammonia water backflow line on the export ammonia water main pipe;Pump front normally open valve is equipped on first import ammonia water branch pipe, second import ammonia water branch pipe and third import ammonia water branch pipe;Pump rear normally open valve is equipped on first export ammonia water branch pipe, second export ammonia water branch pipe and third export ammonia water branch pipe, and is equipped with first electric valve, second electric valve and third electric valve respectively;Fourth electric valve is equipped on the export ammonia water main pipe between first export ammonia water branch pipe and second export ammonia water branch pipe, and fifth electric valve is equipped on the export ammonia water main pipe between second export ammonia water branch pipe and third export ammonia water branch pipe.
[0007] Further, first pressure transmitter and first electromagnetic flowmeter are equipped on first ammonia water export pipe;Second pressure transmitter and second electromagnetic flowmeter are equipped on second ammonia water export pipe.
[0008] Further, the first ammonia water return pipeline and the second ammonia water return pipeline are respectively provided with a first manual return valve and a second manual return valve.
[0009] Further, the first ammonia water branch pipeline, the second ammonia water branch pipeline and the third ammonia water branch pipeline are respectively provided with a pump pre-emptying valve, which is located at the outlet side of the pump pre-constant opening valve.
[0010] Further, the first ammonia water branch pipeline, the second ammonia water branch pipeline and the third ammonia water branch pipeline are respectively provided with a filter, which is located at the inlet side of the pump post-emptying valve.
[0011] Further, the first ammonia water branch pipeline, the second ammonia water branch pipeline and the third ammonia water branch pipeline are respectively provided with a check valve, which is located at the inlet side of the filter.
[0012] The utility model has the advantages of:
[0013] 1. The pump station in a two-in-one standby mode can save a large installation space, and the SNCR and SCR ammonia injection can be simultaneously met in the same system without the need of two system switching, thereby saving the operation cost and facilitating the maintenance.
[0014] 2. The output pipe of the ammonia water solution can be adjusted by switching the electric valve, thereby facilitating the automatic control. DRAWINGS
[0015] Figure 1 It is an external connection pipe schematic view of the multipurpose ammonia supply pump station.
[0016] Figure 2 It is a structural schematic view of the multipurpose ammonia supply pump station. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be described clearly and completely in combination with the drawings and a preferred embodiment.
[0018] Referring to Figure 1 and Figure 2 A multipurpose ammonia supply pump station comprises a first ammonia water pump 10, a second ammonia water pump 9 and a third ammonia water pump 8, which are two-in-one standby.
[0019] The inlets of the first, second and third ammonia water pumps 10, 9 and 8 are respectively connected to the ammonia water inlet main pipe through the first, second and third ammonia water inlet branch pipes, and the ammonia water inlet main pipe is provided with an ammonia water inlet pipe 1; the outlets of the first, second and third ammonia water pumps 10, 9 and 8 are respectively connected to the ammonia water outlet main pipe through the first, second and third ammonia water outlet branch pipes, and the ammonia water outlet main pipe is provided with a first ammonia water outlet pipe 34, a second ammonia water outlet pipe 35, a first ammonia water return pipe 36 and a second ammonia water return pipe 37.
[0020] The first ammonia water inlet branch pipe is provided with a first manual ball valve 2 and a second manual ball valve 5 in sequence along the ammonia water flow direction; the first ammonia water outlet branch pipe is provided with a first check valve 11, a first filter 14, a third manual ball valve 17, a fourth manual ball valve 20 and a first electric valve 23 in sequence along the ammonia water flow direction.
[0021] The second ammonia water inlet branch pipe is provided with a fifth manual ball valve 3 and a sixth manual ball valve 6 in sequence along the ammonia water flow direction; the second ammonia water outlet branch pipe is provided with a second check valve 12, a second filter 15, a seventh manual ball valve 18, an eighth manual ball valve 21 and a second electric valve 24 in sequence along the ammonia water flow direction.
[0022] The third ammonia water inlet branch pipe is provided with a ninth manual ball valve 4 and a tenth manual ball valve 7 in sequence along the ammonia water flow direction; the first ammonia water outlet branch pipe is provided with a third check valve 13, a third filter 16, an eleventh manual ball valve 19, a twelfth manual ball valve 22 and a third electric valve 25 in sequence along the ammonia water flow direction.
[0023] The fourth electric valve 26 is arranged on the ammonia water outlet main pipe between the first and second ammonia water outlet branch pipes, and the fifth electric valve 27 is arranged on the ammonia water outlet main pipe between the second and third ammonia water outlet branch pipes.
[0024] The first, fifth and ninth manual ball valves 2, 3 and 4 are pump front always open valves; the second, sixth and tenth manual ball valves 5, 6 and 7 are pump front emptying valves for emptying the pipeline of ammonia water during maintenance.
[0025] The first, second and third check valves 11, 12 and 13 are used to prevent ammonia water from flowing backward; the first, second and third filters 14, 15 and 16 are used to filter impurities in the ammonia water to prevent the subsequent spray gun nozzles from being blocked; the third, seventh and eleventh manual ball valves 17, 18 and 19 are pump rear emptying valves for emptying during maintenance; the fourth, eighth and twelfth manual ball valves 20, 21 and 22 are pump rear always open valves.
[0026] Preferably, the first electric valve 23, the second electric valve 24, the third electric valve 25, the fourth electric valve 26 and the fifth electric valve 27 are electric ball valves, which are used for switching between the normal pump and the standby pump, the first ammonia outlet pipe 34 and the second ammonia outlet pipe 35.
[0027] The first pressure transmitter 28 and the second pressure transmitter 29 are used for displaying the pressure of the ammonia outlet pipeline.
[0028] The first manual reflux valve 32 and the second manual reflux valve 33 are respectively arranged on the first ammonia reflux pipeline 36 and the second ammonia reflux pipeline 37, and the first manual reflux valve 32 and the second manual reflux valve 33 are respectively manual on-off valves of the first ammonia reflux pipeline 36 and the second ammonia reflux pipeline 37.
[0029] The working mode of the utility model is as follows:
[0030] (1) the second ammonia pump 9 and the third ammonia pump 8 are used for spraying ammonia for SCR and SNCR, and the first ammonia pump 10 is a standby pump.
[0031] When the third ammonia pump 8 is used for spraying ammonia for SCR, the ninth manual ball valve 4, the twelfth manual ball valve 22 and the third electric valve 25 before and after the third ammonia pump 8 are opened, the fifth electric valve 27 is closed, the ammonia solution is discharged from the second ammonia outlet pipe 35, the ammonia flow and the pressure are detected through the second pressure transmitter 29 and the second electromagnetic flowmeter 31, if the amount of ammonia used is small, the pump motor is protected, the second manual reflux valve 33 is opened, and the pump working frequency is increased.
[0032] When the second ammonia pump 9 is used for spraying ammonia for SNCR, the fifth manual ball valve 3, the eighth manual ball valve 21 and the second electric valve 24 before and after the second ammonia pump 9 are opened, the fourth electric valve 26 is opened, the ammonia solution is discharged from the first ammonia outlet pipe 34, the ammonia flow and the pressure are detected through the first pressure transmitter 28 and the first electromagnetic flowmeter 30, if the amount of ammonia used is small, the pump motor is protected, the first manual reflux valve 32 is opened, and the pump working frequency is increased.
[0033] The first ammonia pump 10 is a standby pump, and is in a closed state without power supply, and the first electric valve 23 is in a closed state.
[0034] (II) The third ammonia water pump 8 and the first ammonia water pump 10 are used for SCR and SNCR ammonia injection, and the second ammonia water pump 9 is a standby pump.
[0035] When the third ammonia water pump 8 is used for SCR ammonia injection, the ninth manual ball valve 4, the twelfth manual ball valve 22 and the third electric valve 25 before and after the third ammonia water pump 8 are opened; the fifth electric valve 27 is closed, the ammonia water solution is discharged from the second ammonia water outlet pipe 35, and the ammonia water flow and pressure are detected by the second pressure transmitter 29 and the second electromagnetic flowmeter 31; if the amount of ammonia water used is small, the pump motor is protected, and the second manual backflow valve 33 is opened to increase the pump working frequency.
[0036] When the first ammonia water pump 10 is used for SNCR ammonia injection, the first manual ball valve 2, the fourth manual ball valve 20 and the first electric valve 23 before and after the first ammonia water pump 10 are opened; the fourth electric valve 26 is closed, and the first ammonia water outlet pipe 34 is discharged. If the amount of ammonia water used is small, the pump motor is protected, and the first manual backflow valve 32 is opened to increase the pump working frequency.
[0037] The second ammonia water pump 9 is a standby pump and is in a closed state without power supply, and the second electric valve 24 is also in a closed state.
[0038] (III) The second ammonia water pump 9 and the first ammonia water pump 10 are used for SCR and SNCR ammonia injection, and the third ammonia water pump 8 is a standby pump.
[0039] When the second ammonia water pump 9 is used for SNCR ammonia injection, the fifth manual ball valve 3, the eighth manual ball valve 21 and the second electric valve 24 before and after the second ammonia water pump 9 are opened; the fifth electric valve 27 is opened, the fourth electric valve 26 is closed, the ammonia water solution is discharged from the second ammonia water outlet pipe 35, and the ammonia water flow and pressure are detected by the second pressure transmitter 29 and the second electromagnetic flowmeter 31; if the amount of ammonia water used is small, the pump motor is protected, and the second manual backflow valve 33 is opened to increase the pump working frequency.
[0040] When the first ammonia water pump 10 is used for SNCR ammonia injection, the first manual ball valve 2, the fourth manual ball valve 20 and the first electric valve 23 before and after the first ammonia water pump 10 are opened; the fourth electric valve 26 is closed, and the first ammonia water outlet pipe 34 is discharged. If the amount of ammonia water used is small, the pump motor is protected, and the first manual backflow valve 32 is opened to increase the pump working frequency.
[0041] The third ammonia water pump 8 is a standby pump and is in a closed state without power supply, and the third electric valve 25 is also in a closed state.
[0042] The above merely is preferred implementation manner of the present application, it should be pointed out, for ordinary skilled person in the technical field, on the premise of not departing from the principle of the present application, can also make several improvements and refinements, these improvements and refinements are also within the protection scope of the present application.
Claims
1. A multi-purpose ammonia supply pump station, characterized in that The application relates to a kind of ammonia water pump systems, comprising first ammonia water pump (10), second ammonia water pump (9) and third ammonia water pump (8), the import of first ammonia water pump (10), second ammonia water pump (9) and third ammonia water pump (8) is respectively connected by first ammonia water inlet branch, second ammonia water inlet branch and third ammonia water inlet branch Import ammonia water main pipe, ammonia water inlet pipe (1) is provided on import ammonia water main pipe;The export of first ammonia water pump (10), second ammonia water pump (9) and third ammonia water pump (8) is respectively connected by first ammonia water outlet branch, second ammonia water outlet branch and third ammonia water outlet branch Export ammonia water main pipe, first ammonia water outlet pipe (34), second ammonia water outlet pipe (35), first ammonia water return line (36) and second ammonia water return line (37) are provided on export ammonia water main pipe;First ammonia water inlet branch, second ammonia water inlet branch and third ammonia water inlet branch are all equipped with pump front normally open valve;First ammonia water outlet branch, second ammonia water outlet branch and third ammonia water outlet branch are all equipped with pump rear normally open valve, and are respectively provided with first electric valve (23), second electric valve (24) and third electric valve (25);Fourth electric valve (26) is provided on the export ammonia water main pipe between first ammonia water outlet branch and second ammonia water outlet branch, and fifth electric valve (27) is provided on the export ammonia water main pipe between second ammonia water outlet branch and third ammonia water outlet branch.
2. A multipurpose ammonia supply pump station according to claim 1, characterized in that First ammonia water outlet pipe (34) is equipped with first pressure transmitter (28) and first electromagnetic flowmeter (30);Second ammonia water outlet pipe (35) is equipped with second pressure transmitter (29) and second electromagnetic flowmeter (31).
3. A multipurpose ammonia supply pump station according to claim 1, characterized in that First ammonia water return line (36) and second ammonia water return line (37) are respectively equipped with first hand-operated reflux valve (32) and second hand-operated reflux valve (33).
4. A multipurpose ammonia supply pump station according to claim 1, characterized in that First ammonia water outlet branch, second ammonia water outlet branch and third ammonia water outlet branch are all equipped with pump front emptying valve, and the pump front emptying valve is located on the outlet side of pump front normally open valve;First ammonia water outlet branch, second ammonia water outlet branch and third ammonia water outlet branch are all equipped with pump rear emptying valve, and the pump rear emptying valve is located on the import side of pump rear normally open valve.
5. A multipurpose ammonia supply pump station according to claim 4, characterized in that First ammonia water outlet branch, second ammonia water outlet branch and third ammonia water outlet branch are all equipped with filter, and the filter is located on the import side of pump rear emptying valve.
6. A multipurpose ammonia supply pump station according to claim 5, characterized in that First ammonia water outlet branch, second ammonia water outlet branch and third ammonia water outlet branch are all equipped with check valve, and the check valve is located on the import side of filter.