CN204356320U - A kind of biomass steam blasting assembly - Google Patents

Abstract

A biomass steam explosion device belongs to the technical field of biomass energy. The device includes a steam explosion tank. The upper part of the steam explosion tank is provided with a material inlet, and the lower part is provided with a steam inlet and a material outlet. The steam inlet of the steam explosion tank is connected by a pipeline. The steam generator, the material outlet of the steam explosion tank is connected to the receiving tank through the pipeline, and the receiving tank is a cyclone separator. The cyclone separator includes a cylinder, a gas phase outlet on the upper part of the cylinder, and a solid phase outlet on the lower part. There is a material inlet connected with the material outlet of the steam explosion tank, and a washing tank corresponding to the solid phase outlet is arranged under the cylinder. The utility model is simple in structure and reasonable in design, realizes the gas-solid separation of the mixture after the steam explosion and fully recycles the separated gas phase, effectively avoids environmental pollution and energy waste, and achieves energy saving, water saving, and row purpose.

Description

A biomass steam explosion device

technical field

The utility model belongs to the technical field of biomass energy, in particular to a biomass steam explosion device.

Background technique

In the production process of cellulosic ethanol, straw raw materials need to be pretreated to break the dense network structure formed by lignin and hemicellulose and reduce the crystallinity of cellulose. Steam explosion is a method that can rapidly degrade biomass. CN201195813Y provides an intermittent steam explosion device, including a steam generator, a buffer tank, a steam explosion tank and a receiving tank. Biomass raw materials are added to the steam explosion tank, and steam is passed through the steam generator to the steam explosion tank for a period of time Finally, rapid pressure release to achieve steam explosion. The receiver tank used in this device cannot effectively separate and treat the mixture after steam explosion. If the residual steam after steam explosion is directly discharged into the atmosphere, it will cause air pollution and waste heat. CN201997309 provides a continuous steam explosion device, the essence of which is to use multiple steam explosion tanks to differentiate time to ensure that steam explosion tanks are continuously sprayed during production. The receiving tank used in this device cannot timely discharge the spray explosion residual steam from the gas phase outlet, causing the steam explosion residual steam to condense in the receiving tank, and the spray explosion solid phase product will stick to the receiving tank wall, thereby Cause heat loss in the steam explosion steam. In this patent, a waste heat recovery device is used to condense the steam explosion steam to recover heat. The recovery efficiency is low, and the temperature of the fluid after recovery decreases, turning into low-grade heat energy.

Contents of the invention

    The purpose of the utility model is to provide a biomass steam explosion device which can effectively separate the steam-exploded mixture and make full use of heat energy.

Based on the above purpose, the utility model adopts the following technical scheme: a biomass steam explosion device, comprising a steam explosion tank, the upper part of the steam explosion tank is provided with a material inlet, the lower part is provided with a steam inlet and a material outlet, the steam explosion tank The steam inlet is connected to a steam generator through a pipeline, and the material outlet of the steam explosion tank is connected to a receiving tank through a pipeline. The receiving tank is a cyclone separator, and the cyclone separator includes a cylinder body and a gas phase outlet located on the upper part of the cylinder body, a lower part The solid phase outlet, the material inlet connected with the material outlet of the steam explosion tank is provided on the side wall of the cylinder, and the washing tank corresponding to the solid phase outlet is provided under the cylinder.

The washing tank is provided with a water inlet and a steam inlet, a pressure reducing valve is provided on the pipeline between the steam inlet of the washing tank and the steam outlet of the steam generator, and a jacket is arranged outside the washing tank.

The gas phase outlet of the cyclone separator is divided into two branch pipes, one branch pipe is connected with the jacket exothermic steam explosion residual steam inlet outside the washing tank, and the other branch pipe is connected with a heat exchanger, and the heat-absorbing fluid outlet of the heat exchanger is connected with the The water inlet of the steam generator is connected.

The material inlet of the steam explosion tank top is provided with an exhaust port, and the pipeline between the material outlet of the steam explosion tank and the cyclone separator is successively provided with a drainage pipe and a quick-opening valve, the material inlet of the steam explosion tank, Control valves are provided on the exhaust port and the drain pipe.

Control valves are arranged between the steam outlet of the steam generator and the steam explosion tank and the washing tank, between the gas phase outlet of the cyclone separator and the heat exchanger and the washing tank, and between the heat exchanger and the steam generator.

A silo is provided at the solid phase outlet of the cyclone separator, and a screw conveyor corresponding to the washing tank is provided at the bottom of the silo.

The volume ratio of the cyclone separator and the steam explosion tank is ≥15.

The upper part of the barrel is cylindrical and the lower part is conical.

The utility model is simple in structure and reasonable in design. The biggest advantage is that the gas-solid separation of the mixture after steam explosion is realized, and the separated gas phase is fully recycled, which effectively avoids environmental pollution and energy waste, and achieves energy saving, The purpose of saving water and reducing emissions. Specifically, its beneficial effect is:

(1) The utility model adopts the structural form of the cyclone separator in the receiving tank, which can quickly separate the gas phase and the solid phase entering the receiving tank, so as to avoid the condensation of steam explosion residual steam in the receiving tank, resulting in sticky explosion of solid phase products. knot on the wall of the receiving tank.

(2) In this utility model, the high-heat and high-pressure steam generated by the steam generator is sent to the steam explosion tank on the one hand for steam explosion, and on the other hand, it is decompressed by the pressure reducing valve and sent to the washing tank to directly heat the washing liquid. Fast, high thermal efficiency, but also reduces the use of heating equipment.

(3) In the utility model, the gas phase generated by the cyclone separator enters the jacket outside the washing tank all the way to heat and keep the washing liquid, and at the same time reduces the amount of steam required in the washing tank; The water in the steam generator is heated, and the water before entering the steam generator is heated through the heat exchanger, which reduces the power consumption of the steam generator and achieves the effect of energy saving and emission reduction.

(4) The volume ratio of the cyclone separator and the steam explosion tank in the utility model is ≥15, so as to ensure sufficient pressure relief.

Description of drawings

Fig. 1 is a schematic structural diagram of this embodiment.

Detailed ways

As shown in Figure 1, a kind of biomass steam explosion device, steam explosion tank 2 upper part is provided with material inlet 21 and exhaust port 22, the lower part is provided with steam inlet 23 and material outlet 24, the steam inlet 23 of steam explosion tank 2 passes through Pipeline is connected with steam generator 1, and the material outlet 24 of steam explosion tank 2 is connected with receiving tank by pipeline, and receiving tank is cyclone separator 3, and cyclone separator 3 comprises cylinder body 31 and is positioned at the gas phase outlet 32 of cylinder body 31 tops, The solid phase outlet 34 of the bottom, the top of cylinder body 31 is cylindrical, and the bottom is conical, cylinder body 31 side walls are provided with the material inlet 33 that communicates with the material outlet 24 of steam explosion tank 2, cyclone separator 3 The solid phase outlet 34 is provided with a feed bin 9, and the bottom of the feed bin 9 is provided with a screw conveyor 5 corresponding to the washing tank 4 (the solid phase outlet 34 of the cyclone separator 3 can also be directly connected with the material inlet 41 of the washing tank 4 ).

The washing tank 4 is provided with a water inlet 41 and a steam inlet 42, a pressure reducing valve 6 is arranged on the pipeline between the steam inlet 42 of the washing tank 4 and the steam outlet 11 of the steam generator 1, and a jacket 7 is arranged outside the washing tank 4 .

The gas phase outlet 32 of the cyclone separator 3 is divided into two branch pipes, one branch pipe is connected with the jacket 7 exothermic steam explosion residual steam inlet 71 outside the washing tank 4, and after heat exchange, the condensate outlet 72 of the jacket 7 is discharged to sewage treatment , the other branch pipe is connected with a heat exchanger 8, the gas phase enters through the exothermic steam explosion residual steam inlet 81 of the heat exchanger 8, and after heat exchange, it is discharged from the condensate outlet 82 of the heat exchanger 8 for sewage treatment, and the heat exchanger 8 The heat-absorbing fluid outlet 83 is connected with the water inlet 12 of the steam generator.

The material inlet 21 on the top of the steam explosion tank 2 is provided with an exhaust port 22 to ensure that the internal and external pressure is easy to feed when feeding. The pipeline between the material outlet 24 of the steam explosion tank 2 and the cyclone separator 3 is successively provided with a drainage pipeline 25 and a quick opening valve 26, and the material inlet 21, the exhaust port 22 and the drainage pipeline 25 of the steam explosion tank 2 are all provided with There is a control valve.

Between the steam outlet 11 of the steam generator 1 and the steam explosion tank 2 and the washing tank 4, between the gas phase outlet 32 of the cyclone separator 3 and the heat exchanger 8 and the washing tank 4, and between the heat exchanger 8 and the steam generator 1 There are control valves in each room.

The volume ratio of the cyclone separator 2 and the steam explosion tank 3 is ≥15 to ensure sufficient pressure relief.

The working process of the utility model is as follows: when starting to work, open the feed control valve on the upper part of the steam explosion tank 2, put the crushed and dust-removed, impurity-removed straw raw materials into the steam explosion tank 2, and close the feeding valve after the filling is completed. material control valve. The steam generator 1 is heated by electric heating, and the generated steam is divided into two paths, one path enters the steam explosion tank 2, and the other path is depressurized by the pressure reducing valve 6 and enters the washing tank 4 to heat the washing liquid. The flow of steam is adjusted by the control valve on the connecting pipeline under the steam explosion tank 2, and the steam explosion tank 2 is kept insulated and pressured. After a certain period of time, the quick-opening valve 26 is opened for spraying, and the sprayed material enters the receiving tank. In the tank, the receiving tank adopts the cyclone separator 3 structure to separate the gas and solid of the product after the steam explosion. The upper part of the cyclone separator (receiving tank) 3 is provided with a gas phase outlet 32, and the lower part is provided with a solid phase outlet 34. The gas phase is discharged through the gas phase outlet 32, and the discharged gas phase is divided into two paths: one path enters the jacket outside the washing tank 4 to heat the washing liquid, and the condensed sewage enters the sewage treatment process for treatment; the other path enters the heat exchanger 8, The water entering the steam generator 1 is heated, and the condensed sewage enters the sewage treatment process for treatment. The solid phase enters the bin 9 under the cyclone separator (receiving tank) 3, and is sent to the washing tank 4 by the screw conveyor 5 for washing and then discharged to the next process.

Claims (8)

1. A biomass steam explosion device, comprising a steam explosion tank, the top of the steam explosion tank is provided with a material inlet, the bottom is provided with a steam inlet and a material outlet, and the steam inlet of the steam explosion tank is connected with a steam generator by a pipeline, and the steam explosion tank is connected with a steam generator. The material outlet of the explosion tank is connected to a receiving tank through a pipeline, and it is characterized in that the receiving tank is a cyclone separator, and the cyclone separator includes a cylinder body, a gas phase outlet located at the upper part of the cylinder body, and a solid phase outlet at the lower part of the cylinder body. A material inlet connected to the material outlet of the steam explosion tank is provided on the side wall, and a washing tank corresponding to the solid phase outlet is provided under the cylinder. 2. The biomass steam explosion device as claimed in claim 1, characterized in that, the washing tank is provided with a water inlet and a steam inlet, and the pipeline between the steam inlet of the washing tank and the steam outlet of the steam generator is provided with The pressure reducing valve is equipped with a jacket outside the washing tank. 3. The biomass steam explosion device as claimed in claim 2, characterized in that, the gas phase outlet of the cyclone separator is divided into two branch pipes, and one branch pipe is connected to the jacket exothermic steam explosion residual steam inlet on the outside of the washing tank , the other branch pipe is connected with a heat exchanger, and the heat-absorbing fluid outlet of the heat exchanger is connected with the water inlet of the steam generator. 4. The biomass steam explosion device as claimed in claim 3, characterized in that, the material inlet on the top of the steam explosion tank is provided with an exhaust port, and on the pipeline between the material outlet of the steam explosion tank and the cyclone separator Drainage pipes and quick-opening valves are provided in sequence, and control valves are provided on the material inlet, exhaust port and drainage pipes of the steam explosion tank. 5. biomass steam explosion device as claimed in claim 4, is characterized in that, between the steam outlet of described steam generator and steam explosion tank and washing tank, the gas phase outlet of cyclone separator and heat exchanger and washing tank There are control valves between the heat exchanger and the steam generator. 6. The biomass steam explosion device according to any one of claims 1-5, wherein a silo is provided at the solid phase outlet of the cyclone separator, and a screw conveyor corresponding to the washing tank is provided at the bottom of the silo . 7. The biomass steam explosion device according to claim 6, characterized in that, the volume ratio of the cyclone separator and the steam explosion tank is ≥15. 8. The biomass steam explosion device according to claim 7, characterized in that, the upper part of the cylinder is cylindrical and the lower part is conical.