Steam explosion blow-off assembly and steam explosion equipment

Abstract

The utility model relates to the technical field of steam explosion, and discloses a steam explosion blow-off assembly and steam explosion equipment, the steam explosion blow-off assembly comprises a nozzle communicated with a cooking container, the nozzle is provided with an inner diameter gradually-shrinking section and an inner diameter gradually-expanding section which are sequentially arranged in the direction away from the cooking container, a throat part is formed at the joint of the inner diameter gradually-shrinking section and the inner diameter gradually-expanding section, so that materials in the cooking container can pass through the throat part; according to the utility model, the inner diameter reducing section of the nozzle can narrow the blowing channel of the material to be subjected to steam explosion in the cooking container, so that the material to be subjected to steam explosion in the cooking container can be continuously blown at a smaller blowing flow, and an action element does not need to be arranged on the blowing pipeline of the cooking container for intermittent blowing; furthermore, a plurality of defects existing in the existing intermittent spraying discharging can be overcome; the inner diameter gradually-shrinking section can effectively increase the flow speed of the steam explosion material to be sprayed, and then through quick release of the inner diameter gradually-expanding section, the steam explosion effect of the material to be subjected to steam explosion is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steam explosion technology field, concretely relates to a steam explosion spray and release assembly and steam explosion equipment. BACKGROUND

[0002] Steam explosion technology (abbreviation steam explosion) is a kind of green environmental protection, high efficiency, low energy consumption, economic new type heat processing technology developed in recent years, and it is mainly divided into two stages: the cooking process of gas phase and the steam pressure reduction explosion process.In the first stage, raw materials occur thermochemical reaction under the action of high-temperature high-pressure steam, steam enters the inside of raw materials, reduces its internal connection strength and viscosity, is favorable for subsequent mechanical separation.Different raw materials will occur different reactions in this stage, for example, wood cellulose raw materials will occur acidic self-hydrolysis of hemicellulose, and will also occur deglycosylation of aglycone material;In the second stage, due to instantaneous pressure release, liquid in raw materials and steam medium occur adiabatic expansion simultaneously, thermal energy is converted into mechanical energy and does work, and the expanded gas acts on softened raw materials in the form of shock wave and makes it parallel, and the structure changes.

[0003] The existing steam explosion material spray is generally intermittent discharge, and this mode has many defects: 1) the time interval of intermittent discharge is several seconds to tens of seconds, and the frequent action of action element can cause serious wear and corrosion, so high-cost material is used to manufacture the action element;2) the control element corresponding to the action element also has the defect of high failure rate;3) intermittent discharge can cause the cooking system to be always in pressure charging and pressure release, and the cooking system fluctuates greatly, and parameters are unstable, so the steam supply system is required to be higher;4) intermittent discharge can cause steam flow and pressure to fluctuate greatly, and is not conducive to waste steam recycling. UTILITY MODEL CONTENTS

[0004] The utility model aims at at least one of the technical problems in the related art to some extent.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a steam explosion spray and release assembly for spraying and releasing the material in the cooking container, which comprises a nozzle in communication with the cooking container, the nozzle has an inner diameter tapering section and an inner diameter expanding section arranged in sequence in the direction away from the cooking container, and the connection between the inner diameter tapering section and the inner diameter expanding section is formed into a throat for the material in the cooking container to pass through.

[0006] Preferably, the length of the inner diameter tapering section is greater than the length of the inner diameter expanding section.

[0007] Preferably, the inner diameter tapering section is double-curved tapering;And / or

[0008] The inner diameter gradually expanding section is a hyperbolic gradually expanding section.

[0009] Preferably, the steam explosion spray assembly further comprises a first spray pipe in communication with the cooking vessel, and the nozzle is arranged inside or connected to an end of the first spray pipe away from the cooking vessel.

[0010] Preferably, the nozzle is detachably connected to the end of the first spray pipe away from the cooking vessel.

[0011] Preferably, an end of the first spray pipe close to the nozzle is provided with a first flange, and an end of the nozzle close to the first spray pipe is provided with a first flange, and the first flange is provided with a connecting hole for a bolt to be fixed to the first flange.

[0012] Preferably, an end of the first spray pipe close to the nozzle is provided with a first flange, and an end of the nozzle close to the first spray pipe is provided with a second flange to be clamped and fixed to the first flange by a second flange.

[0013] Preferably, the steam explosion spray assembly further comprises a second spray pipe, which is coaxially arranged outside the nozzle and extends away from the nozzle.

[0014] Preferably, the second spray pipe is gradually expanded in diameter away from the nozzle.

[0015] The second aspect of the utility model provides a steam explosion equipment, the steam explosion equipment includes a cooking vessel and the steam explosion spray assembly, the steam explosion spray assembly is connected with the cooking vessel for spraying the material in the cooking vessel.

[0016] Through the above technical scheme, the nozzle in communication with the cooking vessel has an inner diameter gradually reducing section and an inner diameter gradually expanding section arranged in sequence away from the cooking vessel, and the connection part of the two is formed into a throat for the steam explosion material in the cooking vessel to pass through, the inner diameter gradually reducing section of the nozzle can narrow the spray channel of the steam explosion material in the cooking vessel, so that the steam explosion material in the cooking vessel is continuously sprayed at a small spray flow rate, without the need to set a moving element on the spray pipeline of the cooking vessel for intermittent spraying, thereby overcoming many defects of the existing intermittent spray discharge.

[0017] In addition, the inner diameter gradually reducing section can effectively improve the flow rate of the steam explosion material to be sprayed, and the steam explosion effect of the steam explosion material to be sprayed is significantly improved through the rapid release of the inner diameter gradually expanding section, for example, for biomass raw materials, the steam explosion assembly provided by the utility model can better open the fiber structure of the biomass raw materials. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of a steam explosion spray assembly provided by the present application;

[0019] Figure 2 is a structural schematic view of another steam explosion spray assembly provided by the present application;

[0020] Figure 3 is a structural schematic view of still another steam explosion spray assembly provided by the present application.

[0021] Explanation of Reference Signs

[0022] 10, cooking vessel; 20, nozzle; 21, inner diameter tapering section; 22, inner diameter expanding section; 23, throat; 24, first flange; 241, connecting hole; 25, second flange; 30, first spray pipe; 31, first flange; 40, second flange; 50, second spray pipe. DETAILED DESCRIPTION

[0023] The specific embodiments described hereinbelow are intended to be illustrative only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations can occur depending on specific embodiments contemplated herein.

[0024] As shown in Figure 1 The present application provides a steam explosion spray assembly for spraying out materials in a cooking vessel 10, which comprises a nozzle 20 in communication with the cooking vessel 10, the nozzle 20 having an inner diameter tapering section 21 and an inner diameter expanding section 22 arranged in sequence in a direction away from the cooking vessel 10, and the connection between the inner diameter tapering section 21 and the inner diameter expanding section 22 forms a throat 23 for the materials in the cooking vessel 10 to pass through.

[0025] In the technical scheme provided by the present application, the nozzle 20 in communication with the cooking vessel 10 has the inner diameter tapering section 21 and the inner diameter expanding section 22 arranged in sequence in a direction away from the cooking vessel 10, and the connection between the two forms the throat 23 for the materials to be steam exploded in the cooking vessel 10 to pass through, the inner diameter tapering section 21 of the nozzle 20 can narrow the spray passage of the materials to be steam exploded in the cooking vessel 10, so that the materials to be steam exploded in the cooking vessel 10 can be continuously sprayed at a small spray flow rate, and there is no need to set a moving element on the spray pipeline of the cooking vessel 10 to perform intermittent spraying, thereby overcoming many defects existing in the prior art intermittent spraying.

[0026] In addition, the inner diameter tapering section 21 of the nozzle 20 can effectively improve the flow rate of the material to be sprayed, and the rapid release of the inner diameter expanding section 22 can significantly improve the explosion effect of the material to be exploded, for example, for biomass raw materials, the fiber structure of the biomass raw materials can be better opened by the steam explosion assembly.

[0027] It can be understood that, compared with the prior art, the steam explosion spraying assembly provided by the utility model directly cancels the action element of the steam explosion discharge, and compared with the intermittent spraying discharge, the failure rate of the steam explosion spraying assembly provided by the utility model is greatly reduced, and the service life is effectively prolonged.

[0028] In some embodiments, the length of the inner diameter tapering section 21 is greater than the length of the inner diameter expanding section 22. In this way, the material to be exploded is suddenly released in the inner diameter expanding section 22 after the flow rate is improved in the inner diameter tapering section 21, which can further improve the explosion effect.

[0029] It can be understood that, in the utility model, the inner diameter tapering section 21 refers to the inner diameter gradually decreasing in the length direction of the nozzle 20, and the inner diameter expanding section 22 refers to the inner diameter gradually increasing in the length direction of the nozzle 20. The utility model does not specially limit the specific change form of the inner diameter, for example, it can be tapered or arc-shaped tapering. In a preferred embodiment of the utility model, the inner diameter tapering section 21 is hyperbolic tapering. It should be noted that the hyperbolic tapering refers to using the curve shape of a hyperbola to realize the tapering of the inner diameter. This form is more complex than arc-shaped tapering, but can provide relatively better fluid dynamic performance. Specifically, the hyperbolic tapering can realize greater inner diameter change in a shorter distance due to the change of its curvature, has a more significant effect on the dynamics of the fluid, can control the velocity gradient of the fluid to a certain extent, avoid the generation of violent vortex and turbulence, and is suitable for high-speed fluid and situations requiring fine control. Accordingly, the inner diameter expanding section 22 can also be hyperbolic expanding.

[0030] In some embodiments, the steam explosion spraying assembly further comprises a first spraying pipe 30 in communication with the cooking container 10, and the nozzle 20 is arranged inside the first spraying pipe 30 or connected to one end of the first spraying pipe 30 away from the cooking container 10. In this way, the wood cellulose raw material (for example, straw) to be treated is put into the cooking container 10, enters the first spraying pipe 30 after being pretreated by the cooking container 10, and then is continuously sprayed through the spraying caliber defined by the nozzle 20. Figure 1 As shown in FIG. 2, the nozzle 20 is arranged inside the first spraying pipe 30. Figure 2 and Figure 3 As shown in FIG. 3, the nozzle 20 is arranged at one end of the first spraying pipe 30 away from the cooking container 10.

[0031] It can be understood that, in the technical scheme of the utility model, the structure design of the first spray pipe 30 can realize the adjustment of the spray position of the cooking container 10, for example, adjustment into the container for containing the steam exploded material, and specifically, the end of the first spray pipe 30 away from the cooking container can be directly inserted into the container for containing the steam exploded material, so that the steam exploded material directly enters the container for containing the steam exploded material.

[0032] In the utility model, the control valve can also be arranged on the first spray pipe 30 for controlling the on-off of the first spray pipe 30, when the nozzle 20 fails, the first spray pipe 30 is closed through the control valve, so that the steam exploded material to be sprayed does not flow to the nozzle 20, after the maintenance or replacement of the nozzle 20 is completed, the first spray pipe 30 is opened through the control valve, so that the continuous spraying of the steam exploded material to be sprayed can be realized through the nozzle 20.

[0033] In some embodiments, the nozzle 20 is detachably connected to the end of the first spray pipe 30 away from the cooking container 10. Through the above arrangement, when the nozzle 20 fails, it can be detached for maintenance or replacement.

[0034] It can be understood that, in some embodiments, the nozzle 20 and the first spray pipe 30 can be provided with multiple groups, and the multiple groups of nozzles 20 and the first spray pipes 30 can work independently, so that the problem of stopping the steam explosion operation due to the failure of a certain nozzle 20 does not occur.

[0035] In the utility model, the nozzle 20 can be detachably connected to the end of the first spray pipe 30 in any appropriate form, and in some embodiments, as shown in the figure, the end of the first spray pipe 30 close to the nozzle 20 is provided with a first flange 31, and the end of the nozzle 20 close to the first spray pipe 30 is provided with a first flange 24, and the first flange 24 is provided with a connecting hole 241 for screwing and fixing to the first flange 31. Figure 3 In some embodiments, as shown in the figure, the end of the first spray pipe 30 close to the nozzle 20 is provided with a first flange 31, and the end of the nozzle 20 close to the first spray pipe 30 is provided with a second flange 25, so that the second flange 40 can be clamped and fixed to the first flange 31. It can be understood that, by introducing the second flange 40, the detachable connection of the nozzle 20 to the end of the first spray pipe 30 can be realized through the clamping cooperation of the second flange 40 and the first flange 31, and this structure only needs to be provided with the second flange 25 on the nozzle 20, without further opening the connecting hole 241 after the first flange 24 is provided, so that the manufacturing of the nozzle 20 is relatively simple.

[0036] Figure 2 In some embodiments, as shown in the figure, the end of the first spray pipe 30 close to the nozzle 20 is provided with a first flange 31, and the end of the nozzle 20 close to the first spray pipe 30 is provided with a second flange 25, so that the second flange 40 can be clamped and fixed to the first flange 31. It can be understood that, by introducing the second flange 40, the detachable connection of the nozzle 20 to the end of the first spray pipe 30 can be realized through the clamping cooperation of the second flange 40 and the first flange 31, and this structure only needs to be provided with the second flange 25 on the nozzle 20, without further opening the connecting hole 241 after the first flange 24 is provided, so that the manufacturing of the nozzle 20 is relatively simple. ​

[0037] In some embodiments, the steam explosion spray assembly further comprises a second spray pipe 50, which is coaxially arranged outside the nozzle 20 and extends away from the nozzle 20. It should be noted that the steam explosion material to be released will be released to a larger range through the sudden release of the inner diameter gradually expanding section 22 of the nozzle 20, in order to avoid this situation, the second spray pipe 50 is sleeved outside the nozzle 20, and the steam explosion material is constrained within a certain range by the second spray pipe 50, so that the steam explosion material is collected.

[0038] In the utility model, the second spray pipe 50 can be fixed in any appropriate form outside the nozzle 20, and the material flowing through the nozzle 20 for steam explosion is constrained to prevent the steam explosion material from being sprayed into a too large space. As shown in the drawings, one end of the second spray pipe 50 close to the first spray pipe 30 can be directly welded and fixed on the outer wall of the nozzle 20, and the other end extends away from the nozzle 20. Figure 3

[0039] In another specific embodiment of the utility model, as shown in the drawings, one end of the second spray pipe 50 is fixed on the second flange 40, and when the nozzle 20 is connected to the end of the first spray pipe 30 through the second flange 40, the relative position of the second spray pipe 50 can be fixed. Figure 2

[0040] In some embodiments, the pipe diameter of the second spray pipe 50 is gradually increased away from the nozzle 20. This structure can adapt to the release of the steam explosion material to a certain extent.

[0041] The inventors of the present application found that by limiting the spray aperture of the nozzle 20, the steam explosion material can be continuously sprayed while ensuring the uniformity of the steam explosion material and ensuring that the steam explosion material has a good enzymatic conversion effect.

[0042] Specifically, the spray aperture of the nozzle 20 satisfies the following relationship:

[0043]

[0044] Where d0 is the spray aperture of the nozzle 20, and the unit is m;

[0045] W is the weight flow of the sprayed material, and the unit is kg / h;

[0046] f = V 固 / V 气 , where V 固 is the volume of the solid material in the cooking container, and the unit is m 3 ; V​​气 V is the volume of the gas in the cooking vessel, in m 3 ;

[0047] C is the flow coefficient, which is obtained by looking up the graph with Re and d0 / D, wherein Re is the Reynolds coefficient, which is calculated by the formula DG / μ, wherein D is the pipe diameter of the first blow pipe 30, in m; G is the mass flow rate of the first blow pipe 30, in kg / m 2 ·s; μ is the viscosity, in mPa·s;

[0048] M is the molecular weight of the blow material;

[0049] Z is the compressibility coefficient, which is obtained by looking up the gas compressibility coefficient graph according to the fluid contrast pressure Pr and the contrast temperature Tr;

[0050] T is the temperature of the material to be blown, in K;

[0051] k is the adiabatic coefficient, k = C P / C V ; wherein C p is the constant-pressure heat capacity of the fluid, C V is the constant-volume heat capacity of the fluid, in KJ / (kg·K);

[0052] p1 is the pressure before the material is blown, in Pa;

[0053] p2 is the pressure after the material is blown or the critical limit flow pressure, taking the larger one, in Pa.

[0054] In the technical scheme provided by the utility model, the steam explosion blow assembly includes the first blow pipe 30 which is communicated with the cooking vessel 10, and the nozzle 20 is connected to the inside of the first blow pipe 30 or the end away from the cooking vessel 10, and in the relational expression provided by the utility model for determining the blow caliber of the nozzle 20, the influences of the raw material processing amount, the pressure difference before and after blowing and the temperature on the blow caliber are fully considered, and the blow caliber of the nozzle 20 is calculated by combining the physical properties of the materials in different states.

[0055] It can be understood that in the utility model, the parameter f is the volume ratio of the solid material and the gas in the cooking container 10, so the larger the volume of the solid material, the larger the required spray aperture. The inventor of the present application found that when the parameter f is not introduced, the calculated spray aperture is often blocked by the nozzle 20 or the pressure in the cooking container 10 is unstable through actual use verification, which affects the normal production operation, and the nozzle aperture calculated by introducing the parameter f not only can realize continuous spraying, but also can ensure the uniformity of the steam exploded material and ensure that the steam exploded material has good enzymatic conversion effect.

[0056] According to the technical scheme provided by the utility model, since the nozzle 20 can realize stable and continuous spraying, stable quality and quantity of steam can be sprayed out, and the part of the steam can be recycled, for example, used in the subsequent distillation or evaporation process, so as to achieve the purpose of reducing energy consumption.

[0057] In addition, since the steam explosion spraying assembly provided by the utility model can realize continuous spraying of the steam explosion material in the cooking container 10, it is not necessary to set a moving element on the spraying pipeline of the cooking container 10 for intermittent spraying, so as to overcome many defects existing in the existing intermittent spraying and pulse spraying, and specifically, for example, compared with intermittent spraying, the failure rate of the steam explosion spraying assembly provided by the utility model is greatly reduced, and the service life is effectively prolonged.

[0058] It should be noted that in the technical scheme provided by the utility model, when calculating the d0 value, a flow coefficient C is first assumed, the d0 value calculated according to the relationship (1) is then substituted into the C-Re-d0 / D relationship diagram of the flow limiting orifice to confirm the C value, if it is consistent with the assumption, the d0 value is effective, if it is not consistent, the C value is re-assumed and calculated until the verification is passed.

[0059] The steam explosion spraying assembly provided by the utility model will be further described through specific embodiments.

[0060] The test items in the utility model embodiment are as follows:

[0061] 1. Dry matter content of steam exploded material

[0062] The determination method is that the collected steam exploded material is dried in a constant temperature air drying oven at a specified temperature and time, and the dry matter content of the initial collected steam exploded material is calculated according to the mass difference of the steam exploded material before and after drying when the steam exploded material reaches a constant weight.

[0063] 2. Particle size range of steam exploded material

[0064] The determination method is: using a laboratory small-sized different mesh size vibrating screen to screen the particle size range of the steam explosion material to determine.

[0065] 3. Enzymatic conversion rate of the steam explosion material

[0066] The determination method is: taking an appropriate amount of steam explosion material, under the condition of a certain amount of enzyme and a certain substrate concentration, after 72 hours of enzymatic hydrolysis in the laboratory, the content of glucose in the hydrolysate is determined to calculate the enzymatic conversion rate.

[0067] 4. Waste heat utilization rate

[0068] The amount of steam stably discharged per hour by the steam explosion discharge assembly is counted as A1; the amount of steam used in the subsequent distillation or evaporation process is counted as A2; the waste heat utilization rate is estimated according to the formula A2 / A1*100%.

[0069] Example 1

[0070] In this embodiment, the object of steam explosion is corn straw, the pretreatment temperature is 180℃, and the pressure is 1MPa. The nozzle 20 in this embodiment adopts a hyperboloid type nozzle as shown in Figure 2 , and the discharge caliber is calculated by formula (1).

[0071] In formula (1), W is 10000kg / h;

[0072] f = V 固 / V 气 , wherein V 固 is the volume of the solid material in the cooking vessel 10, with the unit of m 3 ; V 气 is the volume of the gas in the cooking vessel 10, with the unit of m 3 ; the calculated value of f is 0.72;

[0073] C is the flow coefficient, which is obtained by looking up the graph according to the value of Re and d0 / D, wherein Re is the Reynolds coefficient, which is calculated by formula DG / μ, wherein D is the caliber of the first discharge pipe 30, with the unit of m; G is the mass flow rate of the first discharge pipe 30, with the unit of kg / m 2 ·s; μ is the viscosity, with the unit of mPa·s;

[0074] Z is the compressibility factor, which is obtained by looking up the gas compressibility factor graph according to the fluid relative pressure Pr and the relative temperature Tr;

[0075] In this embodiment, the value of Z is 14.68;

[0076] M is the molecular weight of the discharged material, which is calculated to be 10931;

[0077] T is the temperature of the material to be sprayed, 180°C is converted to 453.15K;

[0078] k is the adiabatic coefficient, k = C P / C V ; wherein C p is the constant volume heat capacity of the fluid, C V is the constant volume heat capacity of the fluid, in KJ / (kg·K); the calculated k is 1.4 KJ / (kg·K);

[0079] p1 is 1.0 x 10 6 Pa;

[0080] p2 is 1.0 x 10 5 Pa;

[0081] In the calculation of d0, first assume that the flow coefficient C is 0.62, and calculate d0 to be 0.05m according to the relationship (1), then the calculated d0 value is substituted into the flow limiting orifice plate C-Re-d0 / D relationship diagram to confirm the C value, and the calculation Re = 7.1, d0 / D = 0.2, after confirmation, it is found that the C value is consistent with the assumption, then the d0 = 0.05m is the spray caliber of the nozzle 20 in this embodiment.

[0082] Based on the steam explosion spray assembly provided in this embodiment, corn stalks are pretreated, and steam exploded materials are collected. It is calculated that the dry matter content of the initial collected steam exploded materials in this embodiment is 35-40%; the particle size of the steam exploded materials is 0.3-0.5mm, which reflects good quality uniformity; the enzymatic conversion rate of the steam exploded materials is 92%; through the steam explosion spray assembly provided in this embodiment, 5 tons of steam are stably discharged per hour in the pretreatment process, and at least 4.5 tons of steam can be used for subsequent distillation and evaporation processes, so the waste heat utilization rate is as high as 90% or more.

[0083] Comparative Example 1

[0084] The material treated in this comparative example is the same as that in Example 1, which is corn stalks.

[0085] This comparative example is basically the same as the scheme of Example 1, except that when calculating the spray caliber d0 of the nozzle 20 according to the relationship (1) of the utility model, the parameter f is not considered, and the calculated spray caliber is 0.059m. The nozzle 20 is made according to this spray caliber, and the steam explosion spray assembly is obtained.

[0086] The corn stalks were pretreated based on the steam explosion spray assembly provided in the present comparative example, and the steam exploded material was collected. It was calculated that the dry matter content of the steam exploded material initially collected in the present comparative example was 35-40%; the particle size range of the steam exploded material was 0.3-0.9 mm, which showed poor quality uniformity compared to Example 1; the enzymatic conversion rate of the steam exploded material was 86%; and it was verified through device practical operation that the nozzle 20 of the spray aperture would cause the steam consumption to increase, resulting in an increase of 30% in the steam cost.

[0087] Comparative Example 2

[0088] The material treated in the present comparative example was consistent with that in Example 1, and was corn stalks.

[0089] The present comparative example adopted intermittent spraying. A spray valve was arranged on the spray pipeline of the cooking vessel 10, and the intermittent spraying of the material in the cooking vessel 10 was realized by controlling the opening and closing of the spray valve. The aperture of the spray valve was consistent with the spray aperture of the nozzle 20 in Example 1, and was 0.05 m.

[0090] In the present comparative example, the steam fluctuation amplitude was large, and the steam was sometimes present and sometimes absent, so it could not be stably supplied to other processes, and the waste heat utilization rate was 0.

[0091] It was calculated that in the present comparative example, the dry matter content of the steam exploded material was 15-25%; the particle size range was 0.1-1.0 mm; and the enzymatic conversion rate was 75%.

[0092] It can be obviously seen from the comparison between the present comparative example and Example 1 that the intermittent spraying mode has a large amount of steam, resulting in low dry matter content of the steam exploded material, unstable steam explosion effect, poor quality uniformity of the steam exploded material, and a far lower enzymatic conversion rate than the continuous spraying mode in Example 1.

[0093] Comparative Example 3

[0094] The material treated in the present comparative example was consistent with that in Example 1, and was corn stalks.

[0095] The present comparative example adopted pulse steam explosion. A spray valve was arranged on the spray pipeline of the cooking vessel 10, and the aperture of the spray valve was consistent with the spray aperture of the nozzle 20 in Example 1, and was 0.05 m. The spraying of the material in the cooking vessel 10 was realized by the pulse control of the opening and closing of the spray valve. The specific pulse mode was spraying for 5 seconds every 15 seconds, and spraying 3 times per minute.

[0096] In the present comparative example, the steam fluctuation amplitude was large, and the waste heat utilization rate was 50%.

[0097] It was calculated that in the present comparative example, the dry matter content of the steam exploded material was 40-50%; the particle size range was 0.2-0.8 mm; and the enzymatic conversion rate was 80%.

[0098] It can be obviously seen from the comparison between the present comparative example and example 1 that, compared with intermittent spraying, the pulsed spraying mode can to some extent regard the material as continuous spraying, but the steam flow is not stable, resulting in a waste heat utilization rate of only 50%, and the pulsed spraying of the steam exploded material has the problem of poor quality uniformity, and the enzymatic conversion rate is also low; moreover, the control valve of the pulsed spraying is frequently opened and closed, and is seriously worn, the service life of the valve is short, which affects the stable operation of production and increases the maintenance cost.

[0099] The utility model discloses a second aspect provides a kind of steam explosion equipment, the steam explosion equipment includes cooking container 10 and above-mentioned steam explosion spray component, the steam explosion spray component is connected with the cooking container 10 to be used to spray out the material in the cooking container 10.

[0100] Based on the steam explosion spray component provided by the utility model, the steam explosion equipment can realize the continuous spraying of the material to be steam exploded, effectively overcome the defects of the existing intermittent spraying;In the steam explosion equipment comprising the steam explosion spray component provided by the utility model, the steam consumption is continuous and uniform, effectively reduces the fluctuation of steam system, is beneficial to the operation of power station;In addition, since the steam consumption is continuous and uniform, the temperature, pressure and other parameters of cooking system are stable, and the quality and temperature of the sprayed material are uniform;In addition, since the steam consumption is continuous and uniform, the comprehensive utilization of waste steam after spraying is facilitated.It can be seen that the steam explosion equipment provided by the utility model has broad application prospect.

[0101] The preferred embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to this. Within the technical concept range of the utility model, the technical scheme of the utility model can be subjected to various simple modifications, and in order to avoid unnecessary repetition, the utility model will not be described again for various possible combination modes. But these simple modifications and combinations should also be regarded as the disclosed contents of the utility model, and all belong to the protection range of the utility model.

Claims

1. A steam explosion discharge assembly for discharging material from a cooking vessel (10), characterized in that The steam explosion discharge assembly comprises a nozzle (20) connected to the cooking vessel (10), the nozzle (20) having a gradually reduced inner diameter section (21) and a gradually increased inner diameter section (22) arranged in sequence in a direction away from the cooking vessel (10), and a throat (23) formed at the connection between the gradually reduced inner diameter section (21) and the gradually increased inner diameter section (22) for the material in the cooking vessel (10) to pass through; The steam explosion discharge assembly further comprises a first discharge pipe (30) connected to the cooking vessel (10), and the nozzle (20) is arranged inside the first discharge pipe (30) or connected to the end of the first discharge pipe (30) away from the cooking vessel (10). The steam explosion discharge assembly further comprises a second discharge pipe (50) coaxially arranged outside the nozzle (20) and extending in a direction away from the nozzle (20).

2. The steam decompression poppet assembly of claim 1, wherein, The length of the gradually reduced inner diameter section (21) is greater than the length of the gradually increased inner diameter section (22).

3. The steam decompression poppet assembly of claim 1, wherein, The gradually reduced inner diameter section (21) is a hyperbolic taper; and / or The gradually increased inner diameter section (22) is a hyperbolic taper.

4. The steam decompression assembly of claim 1, wherein, The nozzle (20) is detachably connected to the end of the first discharge pipe (30) away from the cooking vessel (10).

5. The steam decompression poppet assembly of claim 4, wherein, The end of the first discharge pipe (30) close to the nozzle (20) is provided with a first flange (31), and the end of the nozzle (20) close to the first discharge pipe (30) is provided with a first flange (24) with a connecting hole (241) for a bolt to pass through and be fixed to the first flange (31).

6. The steam decompression poppet assembly of claim 4, wherein, The end of the first discharge pipe (30) close to the nozzle (20) is provided with a first flange (31), and the end of the nozzle (20) close to the first discharge pipe (30) is provided with a second flange (25) to be clamped and fixed to the first flange (31) by a second flange (40).

7. The steam decompression assembly of claim 1, wherein, The diameter of the second discharge pipe (50) gradually increases in a direction away from the nozzle (20).

8. An explosion venting device, characterized by The steam explosion discharge assembly of any one of claims 1-7 is connected to the cooking vessel (10) for discharging the material in the cooking vessel (10).

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