CN219363469U - Anaerobic digestion and thermal hydrolysis material blending device - Google Patents

Abstract

The utility model particularly relates to an anaerobic digestion thermal hydrolysis material allocation device which comprises a thermal hydrolysis device, a regulating tank and a water storage device, wherein a slurry pump, a sludge flowmeter and a pipeline type sludge concentration microwave transmitter are sequentially arranged between the thermal hydrolysis device and the regulating tank, the pipeline type sludge concentration microwave transmitter is matched with a sampling valve, the pipeline type sludge concentration microwave transmitter is arranged on a pipeline of vertical upward flow, and an electromagnetic valve and an electromagnetic flowmeter are arranged between the water storage device and the regulating tank. According to the anaerobic digestion thermal hydrolysis material blending device, the solid content of sludge is monitored in real time, the biogas yield is estimated, the gas production efficiency of an anaerobic digestion system is estimated according to the actual yield, the uniformity of the solid content of materials entering an anaerobic digestion tank is ensured and is in a set range, accurate control is achieved, and the expected value of the gas production of anaerobic digestion is mastered in real time.

Description

Anaerobic digestion and thermal hydrolysis material blending device

Technical Field

The utility model belongs to the technical field of sewage treatment, and particularly relates to an anaerobic digestion and thermal hydrolysis material blending device.

Background

The working principle of the sludge thermal hydrolysis technology is that dehydrated sludge (generally with the water content of about 85% -90%) and saturated steam with the temperature of 150-260 ℃ and the pressure of 1.4-2.6 MPa are added into a closed reaction kettle, and the sludge is indirectly heated by the steam, so that sludge zoogloea, internal microorganisms and organic matters are hydrolyzed and broken, thereby inactivating cells, and meanwhile, the organic matters in the cells, such as protein, polysaccharide and the like, are released and enter supernatant. The sludge thermal hydrolysis process comprises two processes of solid matter dissolution and liquefaction and organic matter hydrolysis. After the sludge is subjected to thermal hydrolysis treatment, the concentration of soluble substances in the sludge supernatant is greatly improved, and particularly, the sludge dewatering performance and anaerobic digestion performance can be improved by the most prominent dissolution of proteins and saccharides in the sludge.

The optimal solids content of sludge for CSTR anaerobic digestion is typically 8-12% TS. Therefore, the mud obtained by thermal hydrolysis needs to be distributed so as to enter the CSTR anaerobic digestion tank for anaerobic fermentation. The specific heat capacity of the sludge dry matter is 0.9 kJ/(kg. DEG C), the specific heat capacity of the water is 4.2 kJ/(kg. DEG C), the specific heat capacity and the specific heat capacity are very different, and the heat required by anaerobic fermentation of the sludge with different water contents is also different.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides the anaerobic digestion thermal hydrolysis material blending device which can accurately blend materials, achieves the purposes of saving investment, saving energy and saving operation cost, and simultaneously reduces the generation of biogas slurry. The technical problems to be solved by the utility model are realized by the following technical scheme:

an anaerobic digestion thermal hydrolysis material blending device, comprising: a thermal hydrolysis device, an adjusting tank and a water storage device;

a slurry pump, a sludge flowmeter and a pipeline type sludge concentration microwave transmitter are sequentially arranged between the thermal hydrolysis device and the regulating tank;

the pipeline type sludge concentration microwave transmitter is matched with a sampling valve;

an electromagnetic valve and an electromagnetic flowmeter are arranged between the water storage device and the regulating tank.

Further, the pipeline type sludge concentration microwave transmitter is arranged on a pipeline of vertical upflow.

Further, the water supply of the water storage device is connected with tap water or reclaimed water in the sewage plant.

Further, the regulating tank is a mixing and blending tank for mixing the sludge and the water, the solid content of the sludge is blended to a set value in the regulating tank, and the sludge is pumped into the anaerobic digestion tank after the blending is finished.

Further, the anaerobic digestion thermal hydrolysis material preparing device is completed through a PLC or PAC control program.

The utility model has the beneficial effects that:

1. according to the anaerobic digestion thermal hydrolysis material allocation device, the solid content of sludge is monitored in real time, so that the dry matter of the sludge in unit time and accumulation time can be mastered, the dry matter of the sludge entering the anaerobic digestion tank in a corresponding period is mastered, the biogas yield is estimated, the gas production efficiency of an anaerobic digestion system is estimated according to the actual yield, the uniformity of the solid content of the material entering the anaerobic digestion tank is ensured and is in a set range, accurate control is achieved, the expected value of the anaerobic digestion gas production is mastered in real time, and if the biogas production amount is larger than the expected deviation, relevant influence factors can be tracked as soon as possible;

2. according to the anaerobic digestion thermal hydrolysis material allocation device, the water addition amount can be accurately controlled according to the dry matter quality of the sludge and the set solid content of the sludge in the corresponding period, and the fluctuation of the solid content deviation of the materials entering the anaerobic digestion tank caused by manual allocation is avoided, so that the operation efficiency of an anaerobic digestion system is influenced;

3. according to the anaerobic digestion thermal hydrolysis material allocation device, the manual participation degree is reduced through accurate measurement of the pipeline type sludge concentration microwave transmitter, and real-time control allocation is achieved;

4. the anaerobic digestion thermal hydrolysis material blending device is mainly used for blending the solid content of thermal hydrolysis sludge, and the material can be kitchen waste, livestock and poultry manure or other biomass raw materials besides the sludge.

The present utility model will be described in further detail with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic diagram of an anaerobic digestion pyrolysis material blending device according to the embodiment.

In the figure: 1. a thermal hydrolysis device; 2. a slurry pump; 3. a sludge flowmeter; 4. a pipeline type sludge concentration microwave transmitter; 5. a sampling valve; 6. an electromagnetic valve; 7. an electromagnetic flowmeter; 8. an adjusting tank; 9. and a water storage device.

Detailed Description

The following detailed description, structural features and functions of the present utility model are provided with reference to the accompanying drawings and examples in order to further illustrate the technical means and effects of the present utility model to achieve the predetermined objects.

The embodiment provides an anaerobic digestion pyrohydrolysis material blending device, and high solid content sludge is required to be distributed after pyrohydrolysis to be blended to a proper solid content rate so as to be pumped into an anaerobic digestion tank for anaerobic digestion treatment. Proper water distribution is carried out according to the solid content of the sludge, so that the solid content of anaerobic digestion of the sludge is in an optimal range, the purposes of saving investment, saving energy and saving operation cost can be achieved, the sludge can be subjected to anaerobic digestion more efficiently, more biogas is produced, and the generation of biogas slurry is reduced. For example, the solid content of the sludge is blended to 5% and is blended to 10%, the required volume of the digestion tank is doubled, and the heat required for heating is doubled. According to relevant engineering experience and demonstration, the embodiment provides a device capable of accurately blending materials.

Referring to fig. 1, the anaerobic digestion thermal hydrolysis material preparing device of the present embodiment includes a thermal hydrolysis device 1, a regulating tank 8, and a water storage device 9. A slurry pump 2, a sludge flowmeter 3 and a pipeline type sludge concentration microwave transmitter 4 are sequentially arranged between the thermal hydrolysis device 1 and the regulating tank 8. The pipeline type sludge concentration microwave transmitter 4 is matched with a sampling valve 5, and an electromagnetic valve 6 and an electromagnetic flowmeter 7 are arranged between a water storage device 9 and an adjusting tank 8.

The embodiment is mainly used for the solid content allocation of the thermal hydrolysis sludge, and the materials can be kitchen waste, livestock and poultry manure or other biomass raw materials besides the sludge. The thermal hydrolysis device is mainly used for carrying out thermal hydrolysis treatment on the sludge. The slurry pump is mainly used for conveying the sludge slurry after thermal hydrolysis. A backup mud pump may also be provided that is selectively turned on and off. The sludge flowmeter is mainly used for measuring the flow of sludge in real time.

The pipeline type sludge concentration microwave transmitter is mainly used for measuring the solid content of sludge in real time. The sampling valve is a matched device of the microwave concentration meter. The microwave transmitter is preferentially installed on a vertical upflow pipeline, and cannot be installed on a vertical downward pipeline, so that the sludge obtained by thermal hydrolysis still has a certain high temperature after being cooled and released, contains more bubbles, and cannot be installed at a position where gas is easy to accumulate, such as the top end of an inverted U-shaped pipe.

The electromagnetic valve is mainly used for controlling water adding, and is opened when water adding is needed and closed when water adding is not needed. The water can be connected with tap water or reclaimed water in the sewage plant. The electromagnetic flowmeter is used for measuring the flow of incoming water. The regulating tank is a mixing and blending tank for mixing the sludge and the water, the solid content of the sludge is blended to a set value in the regulating tank, and the sludge is pumped into the anaerobic digestion tank after the blending is completed.

The related formulas and control modes of the embodiment are all completed through a PLC or PAC control program.

The working flow of the anaerobic digestion thermal hydrolysis material blending device of the embodiment is as follows:

and starting a slurry pump through a PLC or PAC control program, pumping the mud slurry subjected to thermal hydrolysis from a thermal hydrolysis device into a regulating tank, measuring in real time through a mud flowmeter and a pipeline type mud concentration microwave transmitter, calculating the mud quantity and dry matter quantity passing through in unit time, and accumulating at the same time. After the slurry pump is started, the electromagnetic valve is automatically started to supplement water to the regulating tank, the water quantity to be supplemented is calculated through a related formula according to the sludge quantity and dry matter quantity which pass through in unit time and the set sludge solid content (namely the sludge solid content which is to be achieved after water is added in the regulating tank), the electromagnetic valve is closed when the water quantity is supplemented to the required water quantity, and the electromagnetic valve is monitored by the electromagnetic flowmeter.

The mud pump and the electromagnetic valve do not have strict linkage function, the electromagnetic valve is opened when the mud pump is opened, the electromagnetic valve is not closed when the mud pump is closed, and whether the electromagnetic valve is closed or not needs to be determined according to the collected water supplementing amount.

In addition, according to the sludge flow and the sludge solid content which are collected in real time, the dry matter quality of the sludge pumped into the anaerobic digestion tank through the regulating tank in the corresponding period can be mastered.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (5)

1. An anaerobic digestion pyrohydrolysis material blending device, which is characterized by comprising: a thermal hydrolysis device (1), an adjusting tank (8) and a water storage device (9);

a slurry pump (2), a sludge flowmeter (3) and a pipeline type sludge concentration microwave transmitter (4) are sequentially arranged between the thermal hydrolysis device (1) and the regulating tank (8);

the pipeline type sludge concentration microwave transmitter (4) is matched with a sampling valve (5);

an electromagnetic valve (6) and an electromagnetic flowmeter (7) are arranged between the water storage device (9) and the regulating tank (8).

2. The anaerobic digestion and thermal hydrolysis material allocation device according to claim 1, wherein the pipeline type sludge concentration microwave transmitter (4) is installed on a pipeline of vertical upflow.

3. The anaerobic digestion and thermal hydrolysis material proportioning device according to claim 1, wherein the water of the water storage device (9) is connected with tap water or recycled water in a sewage plant.

4. The anaerobic digestion and thermal hydrolysis material blending device according to claim 1, wherein the regulating tank (8) is a mixing and blending tank for sludge and water, the solid content of the sludge is blended to a set value in the regulating tank, and the sludge is pumped into the anaerobic digestion tank after the blending is completed.

5. The anaerobic digestion pyrohydrolysis material blending device according to claim 1, wherein the blending is accomplished by a PLC or PAC control program.