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Reductant/dilution water circulating supply system and method

A supply system and reducing agent technology, applied in control/regulation systems, separation methods, chemical instruments and methods, etc., can solve problems such as high operation and maintenance requirements, increased cost and land occupation, boiler flue corrosion, etc., to achieve easy The effect of operation and implementation, simple and practical structure, and small footprint

Inactive Publication Date: 2016-09-07
湖南安普诺环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) One solution is to connect multiple devices in parallel. When the number of boilers is large, a large number of feed pumps need to be configured, which increases the cost and occupies an area; thus the equipment investment is huge, the system is complex, and the operation and maintenance requirements are high.
[0005] (2) Another method is to increase the power of the booster pump and the number of units connected in parallel. Although this method can meet the denitration requirements, the flow rate of the denitrification system cannot be adjusted to ensure the flow requirements of multiple boilers, but the biggest defect is The reason is that the pressure of the reducing agent output by the pressurization system cannot be guaranteed to be constant, the operating cost of the denitrification system is high, and the flue at the tail of the boiler is severely corroded, which will affect the denitrification effect of the boiler and seriously affect the normal operation of the boiler
[0006] In addition, for the dilution water pressurization system, due to the large flow rate, the metering pump cannot be used, but the centrifugal pump can only be used. Once the frequency conversion of the centrifugal pump changes the flow rate, the pressure at the pump outlet will also change accordingly, which is not conducive to The atomization effect of the spray gun affects the denitrification efficiency

Method used

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  • Reductant/dilution water circulating supply system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: Using a self-operated pressure regulating valve

[0050] Such as figure 1 , a reductant / dilution water circulation supply system, comprising a filtering device, a pressurizing device and a return device;

[0051] The filtering device and the pressurizing device are connected in sequence, and the input end of the return device and the reducing agent / dilution water outlet port for supplying reducing agent / dilution water to the boiler are connected to the output pipeline of the pressurizing device;

[0052] The reducing agent / dilution water is output to the boiler from the outlet port of the reducing agent / dilution water after passing through the filtering device and the pressurizing device in sequence; the remaining reducing agent / dilution water flows back through the return device;

[0053] The pressurizing device has a pressurizing pump; the return device has a pressure regulating valve with adjustable pressure.

[0054] A pressure sensor (such as a pressur...

Embodiment 2

[0073] Embodiment 2: Using electric / pneumatic pressure regulating valve

[0074] The previous steps are the same as in Example 1, except that the pressure adjustment method is as follows: Before the system and the device are put into use, the electric / pneumatic pressure adjustment is performed according to the required pressure value at the outlet of the reductant (dilution water) circulation supply device determined by the hydraulic calculation of the denitrification pipe network. The valve carries on the steady pressure value setting. And adjust and control the pressure regulating valve, so that the pressure regulating valve can be adjusted in time according to the system pressure value fed back by the pressure transmitter in front of the valve, so that the system pressure in front of the valve is always stable at the set value. The specific control process is the existing mature technology.

[0075] The technical performance indicators achieved by the reducing agent (dilut...

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Abstract

The invention discloses a reductant / dilution water circulating supply system and method. The reductant / dilution water circulating supply system comprises a filtering device, a pressurizing device and a backflow device, the filtering device and the pressurizing device are connected sequentially, and an input end of the backflow device and a reductant / dilution water outlet end supplying reductant / dilution water for a boiler are both connected with an output pipeline of the pressurizing device; the reductant / dilution water sequentially passes the filtering device and the pressurizing device and then is output to the boiler from the reductant / dilution water outlet end, remaining reductant / dilution water flows back through the backflow device, a pressurizing pump is arranged in the pressurizing device, and a pressure adjusting valve adjustable in pressure is arranged in the backflow device. The reductant / dilution water circulating supply system and method can stabilize supply pressure of a reductant while guaranteeing supply of the reductant, and can effectively guarantee stability of denitration reaction of the boiler while occupying small space.

Description

technical field [0001] The invention particularly relates to a reducing agent / dilution water circulation supply system and method. Background technique [0002] In recent years, fog and haze have occurred more and more frequently in the Beijing-Tianjin-Tangshan area, and in many other parts of the country there have been varying degrees of fog and haze, seriously affecting people's production and life. On September 10, 2013, the State Council issued the Action Plan for Prevention and Control of Air Pollution (2013.9.10). It mentions accelerating the construction of desulfurization, denitrification, and dust removal renovation projects in key industries. Strictly implement the total amount control of pollutant discharge, and make whether the discharge of sulfur dioxide, nitrogen oxides, smoke dust and volatile organic compounds meet the total amount control requirements as a precondition for the environmental impact assessment and approval of construction projects. This pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/79B01D53/56G05D27/02F23J15/02
CPCB01D53/56B01D53/79F23J15/02G05D27/02
Inventor 彭峻易作宏彭伟
Owner 湖南安普诺环保科技有限公司