CN217341221U

CN217341221U - Denitration reductant online dilution system

Info

Publication number: CN217341221U
Application number: CN202221044325.6U
Authority: CN
Inventors: 庞晓杰; 许迎东
Original assignee: Hebei Chengyu Environment Engineering Co ltd
Current assignee: Hebei Chengyu Environment Engineering Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-09-02
Anticipated expiration: 2032-04-29

Abstract

The utility model discloses a denitration reductant system of diluting on line, include from the clear water holding vessel, from ammonia holding vessel, aqueous ammonia flow control pump package, clear water flow control pump package and static mixer, pass through from the clear water holding vessel clear water flow control pump package with static mixer connects, pass through from the ammonia holding vessel aqueous ammonia flow control pump package with static mixer connects, static mixer and reductant injection point are connected. The utility model adopts the above structure a denitration reductant system of diluting on line, equipment is simple, and area is little, sets up in a flexible way, and is with low costs.

Description

Denitration reductant dilutes system on line

Technical Field

The utility model relates to a denitration dilution system technical field especially relates to a denitration reductant system of diluting on line.

Background

In a denitration system, a purchased high-concentration reducing agent system needs to be diluted by clear water at a certain concentration and then used, and in the existing denitration system, a set of mixed dilution system is usually independently arranged at present, and a certain amount of reducing agent solution and clear water are sent into a buffer tank through different pump sets so as to achieve the purpose of accurately controlling the concentration. The solution prepared in the buffer tank is pumped to the position required to be used through another pump set, the system is also called as an off-line mixing system, the investment cost of the system is high, the occupied area of the equipment is large, and the system is inconvenient to use for small enterprises.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a denitration reductant system of diluting on line, equipment is simple, and area is little, sets up in a flexible way, and is with low costs.

In order to achieve the purpose, the utility model provides an online dilution system of denitration reductant, including from clear water holding vessel, from ammonia holding vessel, aqueous ammonia flow control pump package, clear water flow control pump package and static mixer, from the clear water holding vessel pass through clear water flow control pump package with the static mixer is connected, from the ammonia holding vessel pass through aqueous ammonia flow control pump package with the static mixer is connected, the static mixer is connected with reductant injection point;

the ammonia water flow control pump set comprises an ammonia water pump, a first check valve, a first pressure transmitter, a first frequency converter, a first electric regulating valve and a first flowmeter, wherein the first pressure transmitter is arranged on an outlet pipeline of the ammonia water pump;

clear water flow control pump package includes clean water pump, two check valves, pressure transmitter two, converter two, electrical control valve two and flowmeter two, pressure transmitter two sets up on the outlet pipe way of clean water pump, two check valves set up clean water pump with between the pressure transmitter two, pressure transmitter two with two signal connection of converter, converter two with clean water pump electric connection, electrical control valve two sets up the rear side of pressure transmitter two, electrical control valve two's rear side is provided with flowmeter two.

Preferably, a first filter is arranged on the front side of the ammonia water pump, and a first manual ball valve is arranged on the front side of the first filter.

Preferably, a second filter is arranged on the front side of the clean water pump, and a second manual ball valve is arranged on the front side of the second filter.

Preferably, the control modes of the first frequency converter and the second frequency converter are PID control modes.

Therefore, the utility model adopts the above structure a denitration reductant system of diluting on line, equipment is simple, and area is little, sets up in a flexible way, and is with low costs.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

FIG. 1 is a process flow diagram of an embodiment of the denitration reducing agent on-line dilution system of the present invention.

Reference numerals:

1. a self-cleaning water storage tank; 2. from an ammonia storage tank; 3. an ammonia water flow control pump set; 301. an ammonia pump; 302. a first check valve; 303. a first pressure transmitter; 304. a first frequency converter; 305. a first electric regulating valve; 306. a first flowmeter; 4. a clear water flow control pump set; 401. a clean water pump; 402. a second check valve; 403. a second pressure transmitter; 404. a second frequency converter; 405. a second electric regulating valve; 406. a second flowmeter; 5. a static mixer; 6. a first filter; 7. a first manual ball valve; 8. a second filter; 9. and a second manual ball valve.

Detailed Description

The technical solution of the present invention is further explained by the accompanying drawings and examples.

Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Examples

FIG. 1 is a flow chart of the process of the embodiment of the denitration reducing agent on-line dilution system of the present invention, as shown in the figure, the present invention provides an on-line denitration reducing agent dilution system, which comprises a self-clean water storage tank 1, a self-ammonia water storage tank 2, an ammonia water flow control pump set 3, a clean water flow control pump set 4 and a static mixer 5, wherein the self-clean water storage tank 1 is connected with the static mixer 5 through the clean water flow control pump set 4, the self-ammonia water storage tank 2 is connected with the static mixer 5 through the ammonia water flow control pump set 3, the static mixer 5 is connected with a reducing agent injection point, the flow of two kinds of liquid is adjusted through the clean water flow control pump set 4 and the ammonia water flow control pump set 3, thereby obtaining ammonia water solutions with different concentrations, the two kinds of liquid enter the static mixer 5 according to the required amount and are directly sent to the use point, the diluted solution is not required to be stored in a buffer tank and then sent to the injection point through other pump sets, small occupied area, flexible arrangement and low cost.

The ammonia water flow control pump group 3 comprises an ammonia water pump 301, a check valve 302, a pressure transmitter 303, a frequency converter 304, an electric control valve 305 and a flowmeter 306, wherein the pressure transmitter 303 is arranged on an outlet pipeline of the ammonia water pump 301, the check valve 302 is arranged between the ammonia water pump 301 and the pressure transmitter 303, the pressure transmitter 303 is in signal connection with the frequency converter 304, the frequency converter 304 is electrically connected with the ammonia water pump 301, the electric control valve 305 is arranged on the rear side of the pressure transmitter 303, and the flowmeter 306 is arranged on the rear side of the electric control valve 305. The pressure signal on the outlet pipeline of the ammonia water pump 301 is transmitted to the first frequency converter 304 through the first pressure transmitter 303, the control mode of the first frequency converter 304 is a PID control mode, and the first frequency converter 304 compares the signal transmitted by the first pressure transmitter 303 with a set value of the signal, so that the pressure of the ammonia water pump 301 is controlled to be constant, and the solution flow is ensured to be stable. Then the opening size of the electric regulating valve I is controlled according to the flow data measured by the flowmeter I306, so that the liquid flow can be regulated, and the condition that when the flow of a certain solution is regulated, the flow of the other solution fluctuates cannot occur due to the constant pressure of the ammonia pump 301, so that the concentration of the diluted ammonia water solution is constant.

The clean water flow control pump group 4 comprises a clean water pump 401, a second check valve 402, a second pressure transmitter 403, a second frequency converter 404, a second electric regulating valve 405 and a second flowmeter 406, the second pressure transmitter 403 is arranged on an outlet pipeline of the clean water pump 401, the second check valve 402 is arranged between the clean water pump 401 and the second pressure transmitter 403, the second pressure transmitter 403 is in signal connection with the second frequency converter 404, the second frequency converter 404 is electrically connected with the clean water pump 401, the second electric regulating valve 405 is arranged on the rear side of the second pressure transmitter 403, and the second flowmeter 406 is arranged on the rear side of the second electric regulating valve 405. And transmitting a pressure signal on an outlet pipeline of the clean water pump 401 to a second frequency converter 404 through a second pressure transmitter 403, wherein the control mode of the second frequency converter 404 is a PID control mode, and the second frequency converter 404 compares a signal transmitted by the second pressure transmitter 403 with a set value thereof, so that the pressure of the clean water pump 401 is controlled to be constant, and the solution flow is ensured to be stable. Then the opening size of the second electric regulating valve is controlled according to the flow data measured by the second flowmeter 406, so that the liquid flow can be regulated, and the condition that when the flow of a certain solution is regulated, the flow of the other solution fluctuates cannot occur due to the constant pressure of the clean water pump 401, so that the concentration of the diluted ammonia water solution is constant.

The front side of ammonia water pump 301 is provided with filter 6, and the front side of filter 6 is provided with manual ball valve 7, and the front side of clarified water pump 401 is provided with filter two 8, and the front side of filter two 8 is provided with manual ball valve two 9, and filter one 6 will be got rid of from the impurity in the aqueous ammonia solution, and filter two 8 will get rid of from the impurity in the clarified water to reduce the wearing and tearing to ammonia water pump 301 and clarified water pump 401, prolong its life.

The specific implementation process comprises the following steps: carry to the static mixer in through aqueous ammonia flow control pump package from the aqueous ammonia, then monitor aqueous ammonia flow through flowmeter one in the static mixer from clear water carries through clear water flow control pump package to the static mixer, monitor clear water flow through flowmeter two, then mix the aqueous ammonia solution of constant flow and clear water in the static mixer again and directly carry into the injection point, area is little, the setting is nimble, and is with low costs, and aqueous ammonia solution flow is adjustable with clear water flow, thereby realize diluting the reductant of different concentrations, and is simple and convenient.

Therefore, the utility model adopts the above structure a denitration reductant system of diluting on line, equipment is simple, and area is little, sets up in a flexible way, and is with low costs to aqueous ammonia solution flow and clear water flow are adjustable, thereby realize diluting the reductant of different concentrations, and is simple and convenient, convenient to use.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that: the technical solution of the present invention can still be modified or replaced by other equivalent means, and the modified technical solution can not be separated from the spirit and scope of the technical solution of the present invention.

Claims

1. The utility model provides an online dilution system of denitration reductant which characterized in that: the device comprises a self-clear water storage tank, a self-ammonia water storage tank, an ammonia water flow control pump set, a clear water flow control pump set and a static mixer, wherein the self-clear water storage tank is connected with the static mixer through the clear water flow control pump set, the self-ammonia water storage tank is connected with the static mixer through the ammonia water flow control pump set, and the static mixer is connected with a reducing agent injection point;

clear water flow control pump package includes clear water pump, two check valves, pressure transmitter two, frequency converter two, electrical control valve two and flowmeter two, pressure transmitter two sets up on the outlet pipe way of clear water pump, two check valves set up the clear water pump with between the pressure transmitter two, pressure transmitter two with two signal connection of frequency converter, frequency converter two with clear water pump electric connection, two settings of electrical control valve are in the rear side of pressure transmitter two, the rear side of electrical control valve two is provided with flowmeter two.

2. The denitration reducing agent online dilution system of claim 1, characterized in that: the front side of the ammonia water pump is provided with a first filter, and the front side of the first filter is provided with a first manual ball valve.

3. The denitration reducing agent online dilution system of claim 1, characterized in that: and a second filter is arranged on the front side of the clean water pump, and a second manual ball valve is arranged on the front side of the second filter.

4. The denitration reducing agent online dilution system of claim 1, characterized in that: and the control modes of the first frequency converter and the second frequency converter are PID control modes.