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Sludge metering equipment in sludge drying system and metering method

A technology of sludge drying and metering method, applied in the field of metering, can solve the problem of unmeasured sludge, and achieve the effect of accurate metering

Inactive Publication Date: 2014-01-15
TAOPU SEWAGE TRAEATMENT PLANT OF SHANGHAI CHENGTOU SEWAGE TREATMENT
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Problems solved by technology

[0003] In order to solve the problem that the sludge cannot be measured during sludge incineration, the object of the present invention is to provide a sludge metering device and a metering method in the sludge drying system. According to the rotation speed of each sludge pump, a linear proportional The amount of sludge transported, and then analyzed to obtain the sludge measurement formula and corresponding measurement parameters, to achieve accurate measurement

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  • Sludge metering equipment in sludge drying system and metering method
  • Sludge metering equipment in sludge drying system and metering method
  • Sludge metering equipment in sludge drying system and metering method

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Embodiment Construction

[0025] The relevant parameters involved in the Shanghai Shidongkou sludge incineration project are used as an example to illustrate the measurement method of sludge, especially dewatered sludge, in the sludge drying system of the present invention.

[0026] Since the flow velocity range that the electromagnetic flowmeter can measure is generally 0.5~10m / s, the economic flow velocity range is 1.5~3m / s. In the sludge drying and incineration system, the conveying speed of the dewatered sludge in the pipeline is about 0.3~3cm / s (see Table 1), so the electromagnetic flowmeter cannot be used for accurate measurement.

[0027] Table 1 Dewatered sludge flow rate table

[0028]

[0029] After excluding the possibility of using conventional measuring instruments, the sludge conveying equipment and its control signals in the system are emphatically studied. Originally, the AO module (that is, the analog output module) of the control system in the sludge drying system output the speed...

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Abstract

The invention relates to sludge metering equipment in a sludge drying system and a metering method. When a frequency changer of a sludge pump is started or shut off through a middle relay, a loop of a rotational speed control signal is switched on or switched off. When the loop is communicated, the rotational speed control signal provided and input by a control system is divided into two paths through a distributor, then one path of the signal is output to the sludge pump so that the sludge pump can operate according to the set rotational speed to convey sludge, the other path of the signal output by the distributor is output to a digital recorder, according to a metering formula set in the digital recorder, the rotational speed of the sludge pump is converted to an instant value and an accumulative value of sludge conveying flow, and the rotational speed of the sludge pump and the sludge conveying flows of the sludge pump are in a linear relationship. According to the sludge metering equipment in the sludge drying system and the metering method, continuous metering of sludge in the drying combustion system is achieved.

Description

technical field [0001] The invention relates to the field of metering, in particular to a sludge metering device and a metering method in a sludge drying system. Background technique [0002] Existing sludge incineration projects cannot accurately check and verify the actual amount of sludge treated during long-term operation. The reason is that there is no sludge measurement in the existing drying system, and the difficulty of sludge measurement lies in the sludge Its fluidity is poor, and it cannot be measured by ordinary conventional instruments. For example, the most commonly used electromagnetic flowmeter at present generally requires the minimum flow rate of the measured medium to be 30cm / s, while in the sludge drying system, the actual sludge flow rate in the pipeline is 3-5cm / s, so electromagnetic flowmeters cannot be used. flow meter. Contents of the invention [0003] In order to solve the problem that the sludge cannot be measured during sludge incineration, t...

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Application Information

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IPC IPC(8): G01F1/86C02F11/12
Inventor 陈秋忠周丕仁董云彩汪喜生许洲陆君麦穗海孔利明
Owner TAOPU SEWAGE TRAEATMENT PLANT OF SHANGHAI CHENGTOU SEWAGE TREATMENT
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