CN210419701U

CN210419701U - Straw and sludge coprocessing device

Info

Publication number: CN210419701U
Application number: CN201921085194.4U
Authority: CN
Inventors: 余广炜; 邢贞娇; 汪印
Original assignee: Institute of Urban Environment of CAS
Current assignee: Zhongke Environmental Science and Technology Research Institute (Jiaxing) Co.,Ltd.
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-04-28
Anticipated expiration: 2029-07-11

Abstract

The utility model belongs to discarded object utilization field discloses a straw and sludge coprocessing's device, include: the device comprises a crushing device (15), a 2# drying and dewatering device (17), a 2# pyrolysis device (19), a 2# cooling device (20), a mixing and tempering device (3), a filter pressing device (4), a 1# drying and dewatering device (6), a 1# pyrolysis device (8), a 1# cooling device (9), a sewage treatment device (12), a 1# combustion chamber (22), a 2# combustion chamber (23) and a 3# combustion chamber (24). Adopt the utility model provides a device of straw and mud coprocessing can improve the performance index of mud pyrolytic carbon, avoids realizing the energy step utilization because the straw burns produced "haze" problem.

Description

Straw and sludge coprocessing device

Technical Field

The utility model belongs to discarded object utilization field, especially a device of straw and mud coprocessing.

Background

The crop straws in China have large yield, wide distribution and various varieties. According to survey statistics, the collectable amount of the straws exceeds 7 hundred million tons per year, and the utilization rate is less than 70 percent. The straws are valuable resources for the life and agricultural development of farmers for a long time, but with the change of agricultural production modes and the improvement of rural living conditions, the dependence of farmers on the straws in a household unit farming mode is gradually reduced, the enthusiasm for collecting and using the straws is reduced, the phenomenon of regional, seasonal and structural excess straws appears, and most of the excess straws are subjected to open-air incineration treatment. Researches show that the contribution degree of large-area concentrated burning of the straws to haze is high in a short period, and great adverse effects are brought to the environment of the peripheral area; local governments often face great difficulties in the management of burning straw. Therefore, the search for a more superior resource utilization technology of crop straws is a key problem for treating haze, and the final development trend is to reduce open-air incineration and realize centralized recycling.

Much research has been done at present with respect to straw treatment. CN106187453A discloses a carbonized straw bio-organic fertilizer and a preparation method thereof, the carbonized straw bio-organic fertilizer is prepared from the bio-organic fertilizer and the carbonized straw organic fertilizer according to the weight ratio of 1:1, the organic fertilizer has complete nutrient elements, can improve soil, does not cause soil hardening, improves the product quality and the disease and insect resistance of plants, and fully utilizes waste straws and animal manure in rural areas. CN106905051A discloses a method for producing liquid fertilizer by using straw carbonized products and pig raising wastewater, adding straw carbon powder into pig raising wastewater, fully mixing, standing for 2-3 days, taking out supernatant, adding refined straw vinegar liquid into the supernatant, standing for 12-24 hours, adding the straw carbon powder and fly ash, standing for 24 hours, filtering to obtain filtrate, adding magnesium sulfate, boric acid, ferrous sulfate, calcium nitrate and dodecyl benzene sulfonic acid into the filtrate, and uniformly mixing to obtain the liquid fertilizer. CN107266196A discloses a soil conditioner for straw carbonization and field returning and a preparation method thereof, the soil conditioner comprising straw carbon, brown coal powder and zeolite adsorbing pyroligneous is obtained by carbonizing straw, and separating and extracting phenols, ethanol and the like in advance, dispersed soil particles can be promoted to agglomerate to form aggregates, the content and stability of water-stable aggregates in soil are increased, and the air permeability, water retention and fertilizer retention are improved. The above patent application mainly treats the straws as a biological fertilizer after treatment so as to utilize the soil.

CN106179212A discloses a method for carbonizing straw, which relates to the technical field of agriculture and comprises the steps of straw soil removal treatment, straw smashing, mixing, straw carbonization and finished product compression to form active carbon with strong adsorption capacity, so that the environmental pollution caused by straw burning can be avoided, the straw accumulation can be avoided to occupy a large amount of space, and the straw can be reused to the maximum extent. CN108753328A discloses a carbonization processing method of corn straw, firstly preprocessing the straw, improving the strength of the straw, reducing the ash content, then adopting a step-type carbonization temperature rising mode, not only improving the carbonization effect, but also saving energy, finally carrying out activation treatment, improving the gasification reaction and the micropore forming speed, and the prepared biomass charcoal has good and uniform density and a gap structure, large specific surface area which can reach 1200m²The adsorption capacity is strong, and the adsorption capacity at room temperature can reach 140 mg/g. The application of the patent prepares the straw into the activated carbon, and has the disadvantages of complex process, high cost and poor applicability.

CN101967416A provides a crop straw carbide alcohol-loaded solid fuel and a preparation method thereof. The solid fuel comprises carbide of crop straws, industrial alcohol and a gelling agent. Firstly, drying and cutting crop straws, and carbonizing at 250-500 ℃ for 1-4 h to obtain carbonized materials of the crop straws; then mixing 100 parts by weight of industrial alcohol with 1-5 parts by weight of gelling agent to obtain an alcohol solution containing the gelling agent; and absorbing the alcohol solution containing the gelling agent by using the carbide of the crop straws to obtain the crop straw carbide alcohol-loaded solid fuel. CN106318418A discloses a method for preparing biomass charcoal fuel by low-temperature carbonization of corn stalks, wherein nitrogen is introduced into a carbonization furnace to ensure that the interior of the carbonization furnace is in an oxygen-free or low-oxygen environment, corn stalk raw material particles are fed from the top of the carbonization furnace, hot air flow enters from the bottom of the carbonization furnace, and a countercurrent reaction area is formed in the furnace; the reaction temperature at the bottom of the carbonization furnace is controlled to be 200-280 ℃, the pressure in the carbonization furnace is 1010-1200 mbar, biomass charcoal fuel generated by reaction is output from the bottom of the carbonization furnace, and the obtained biomass charcoal has high energy density and can be used as fuel. The above patent application mainly prepares straw into solid fuel, and does not relate to the co-treatment with sludge.

In addition, with the rapid development of economy, the urbanization process of China is accelerated continuously, the sewage treatment scale of the municipal sewage treatment plant is enlarged continuously, the treatment efficiency is improved remarkably, the yield of municipal sludge is increased rapidly, the pressure of municipal sludge treatment is increased more and more, and the annual yield of sludge is estimated to reach 6000 million tons in 2020. The sludge pyrolysis carbonization technology is developed and is closely concerned by researchers, and because the technology can remove viruses, parasitic organisms and toxic pollutants in the sludge, the biochar which can be recycled is produced. The sludge pyrolysis carbonization process can well realize the harmlessness and reduction of the sludge and solidify heavy metals to a certain extent. The sludge biochar can be used for soil improvement because the sludge biochar is beneficial to the enrichment of soil moisture and the growth of microorganisms, and has a solidifying effect on heavy metals such As Cd, Zn, Cu, Pb, Ni, As and the like. At present, due to low heat value of sludge and complex content of heavy metal and other pollutants, the focus of research on pyrolysis and carbonization of sludge still focuses on reducing sludge treatment cost, reducing energy consumption, realizing large-scale safe utilization of products and the like.

There are also some patent documents reporting about the combined disposal of straw and sludge. For example, CN108178484A discloses a method for biological pre-drying of sludge combined with straw powder, which comprises concentrating and dewatering sludge until the water content is 75-85%, adding straw powder on which beneficial microbial strains grow, and consuming organic matters in sludge by microbes to generate heat to perform pre-drying. However, the method mainly adopts a mode of adding beneficial microbial strains into straws for fermentation to carry out sludge drying and dehydration, and has low efficiency.

CN108587719A discloses a method for manufacturing environment-friendly renewable coal by using garbage, straws and sludge, which comprises the steps of mixing pretreated garbage, pretreated straws and pretreated sludge in a mixer according to a ratio to obtain renewable coal materials, and putting the renewable coal materials into a renewable coal forming machine to obtain the environment-friendly renewable coal which is used as fuel. CN106635226A discloses a method for preparing fuel blocks by using sludge and straws as processing raw materials, mixing the straws, the sludge and inert additives and then compressing and molding the mixture to prepare the fuel blocks, wherein the obtained fuel blocks have uniform and easy-to-convey heat value, can reduce a large amount of chemical incomplete combustion heat loss and smoke exhaust heat loss, have uniform and moderate combustion speed and relatively stable combustion, and simultaneously improve the combustion heat value of the sludge and the straws. CN102703155A discloses a biomass fuel based on sludge-straw-raw coal and a preparation method thereof, the method comprises the steps of adding raw limestone into dehydrated sludge after an aluminum salt coagulant is applied, wherein the raw limestone accounts for 1-3% of the sludge by mass; mixing the sludge and the straws, and carrying out aerobic composting; mixing raw coal and the sludge-straw mixture, and performing compression molding to obtain the biomass fuel. However, although the above method discloses that the sludge and the straw can be mixed to prepare the biofuel, the treatment process is complicated, and inorganic additives are required to be added, which is high in cost.

CN104003384A discloses a method for preparing activated carbon by using activated sludge mixed reed straws, which comprises the steps of activating a sludge and straw mixed sample by potassium hydroxide with a certain concentration, centrifuging the sludge and straw mixture after activation, drying a solid sample obtained after centrifugation in a vacuum drying oven, pyrolyzing the dried sludge and straw mixture by using nitrogen as a protective gas, cooling, soaking the obtained activated carbon crude sample by using hydrochloric acid, washing by using distilled water, and finally drying to obtain the activated carbon. CN108975330A discloses a method for preparing activated carbon by using straws and sludge, which comprises the steps of drying and crushing the sludge to obtain sludge particles; crushing and drying the straws to obtain straw powder; then mixing the sludge particles with the straw powder to obtain a mixture; dissolving hydroxypropyl methyl cellulose in water to obtain a water solution; and adding the aqueous solution into the mixture, stirring and granulating to obtain sludge particles and straw powder combined particles, carbonizing to obtain a carbonized material, pickling and washing the carbonized material, and drying to obtain the activated carbon. However, although the method discloses that the activated carbon can be prepared by mixing the sludge and the straws, the inorganic substance content in the sludge is low, and carbonization and chemical activation processes are required, so that the method has high environmental protection requirement and high cost, and cannot be widely applied.

CN103540331A discloses a method for fixing carbon by combining municipal sludge and crop straws, which is a simple method for fixing carbon with high efficiency and low consumption based on the property complementation of the sludge and the straws. According to the method, the straws and the sludge are mixed and then combined for carbon fixation, energy released by the straws can be utilized to make up for the deficiency of energy when the sludge is carbonized and fixed for carbon independently, and self-balance of the energy is realized. However, although the above method mentions that the straw and the sludge can be mixed for pyrolysis and carbonization, the sludge and the straw are simply mixed, the straw pyrolysis carbon is not used as a sludge dehydration conditioner, and the energy cascade of the sludge and straw pyrolysis process is not realized.

The problems of high energy consumption, large ash content of the pyrolytic carbon, low porosity, high cost and the like in the production process of preparing the biochar by pyrolyzing the sludge limit further popularization and application of the sludge pyrolytic carbon technology, and especially, if the water content of the sludge is required to reach 60 percent or even below 50 percent, breakthrough needs to be made in the sludge conditioning technology and the sludge squeezing technology. The sludge squeezing technology is embodied in the development of plate-and-frame filter presses, such as high-pressure diaphragm plate-and-frame filter presses, high-pressure full-steel plate-and-frame filter presses, elastic filter presses and the like. The conditioning of sludge mainly comprises two types of technologies: one is that ferric trichloride and lime are used as conditioner, the addition amount is about 30% of the dry weight of the sludge; the other is an inorganic conditioner taking a sludge curing agent as a main component, and the addition amount of the inorganic conditioner is 5-20% of the dry weight of the sludge. These methods of sludge conditioning reduce the water content of the sludge (i.e., reduce the volume) and increase the weight of the sludge due to the addition of chemicals. In addition, the added inorganic salt substance reduces the heat value of the sludge, is not beneficial to thermal incineration utilization, increases iron and aluminum salts in the sludge, and is also not beneficial to land utilization. Therefore, the premise of realizing the industrialization of the sludge high-efficiency treatment technology is to solve a series of problems existing in the production processes of sludge dehydration and pyrolysis carbonization at present, and the method is developed in the directions of reducing the sludge dehydration cost, improving the performance index of the biochar, expanding the application range, reducing the environmental pollution and the like.

SUMMERY OF THE UTILITY MODEL

In the current research and application, sludge and straws are subjected to single pyrolysis treatment, and the resource complementation and the energy complementation are realized by insufficient cooperative treatment of the sludge and the straws. The utility model aims at overcoming the problem that the current sludge and straw resourceful treatment technique and device lack, and providing a straw and sludge coprocessing device to the at utmost realizes the solid useless coprocessing of polybasic organic.

The utility model discloses an inventor discovers after the intensive research, introduces the sludge treatment field with crop straw, is used for the sludge dewatering quenching and tempering with straw pyrolytic carbon, can improve dehydration efficiency, regulates and control mud activated carbon hole and surface functional group, solidification heavy metal to greatly improved the performance index of modified mud biochar, showing the treatment cost that reduces mud and straw, reinforcing market competition. Based on this, the present invention has been completed.

Specifically, the utility model provides a straw and sludge coprocessing's device, wherein, the device includes breaker, 2# stoving dewatering device, 2# pyrolysis device, 2# cooling device, mix quenching and tempering device, filter pressing device, 1# stoving dewatering device, 1# pyrolysis device, 1# cooling device, sewage treatment plant, 1# combustion chamber, 2# combustion chamber and 3# combustion chamber; breaker export through 5# conveyor with 2# drying and dewatering device entry intercommunication, 2# drying and dewatering device solid phase export through 6# conveyor with 2# pyrolysis device entry intercommunication, 2# pyrolysis device solid phase export with 2# cooling device intercommunication, 2# cooling device export through 7# conveyor with mix quenching and tempering device entry intercommunication, mix quenching and tempering device export with filter-pressing device entry intercommunication, filter-pressing device solid phase export through 2# conveyor with 1# drying and dewatering device entry intercommunication and liquid phase export with sewage treatment device entry intercommunication, 1# drying and dewatering device solid phase export through 3# conveyor with 1# pyrolysis device entry intercommunication, 1# pyrolysis device solid phase export with 1# cooling device entry intercommunication, 1# drying and dewatering device exhanst gas outlet and 1# pyrolysis device exhanst gas outlet all with 1# pyrolysis device entry intercommunication The 2# drying and dehydrating device is communicated with a fuel inlet, a gas phase outlet of the 2# pyrolysis device is communicated with a gas inlet of the 1# combustion chamber, the 2# combustion chamber and the 3# combustion chamber respectively, energy generated by combustion of the 1# combustion chamber is used for the 1# drying and dehydrating device, energy generated by combustion of the 2# combustion chamber is used for the 1# pyrolysis device, and energy generated by combustion of the 3# combustion chamber is used for the 2# pyrolysis device.

Furthermore, the device for the co-processing of the straws and the sludge provided by the utility model also comprises a sludge storage bin, wherein the outlet of the sludge storage bin is communicated with the inlet of the mixing and tempering device through a 1# conveying device; and/or the device also comprises a No. 1 condensing device, wherein a steam outlet of the No. 1 drying and dehydrating device is communicated with an inlet of the No. 1 condensing device, a liquid outlet of the No. 1 condensing device is communicated with an inlet of the sewage treatment device, and a gas outlet of the No. 1 condensing device is communicated with an inlet of the No. 1 combustion chamber through a No. 1 fan; and/or the device also comprises a 2# condensing device, a tail gas purification device and a chimney, wherein the flue gas outlet of the 2# drying dehydration device is communicated with the inlet of the 2# condensing device, the outlet of the 2# condensing device is communicated with the inlet of the tail gas purification device through a 2# fan, and the outlet of the tail gas purification device is communicated with the inlet of the chimney; and/or the finished product warehouse is further included, and the outlet of the No. 1 cooling device is communicated with the inlet of the finished product warehouse through the No. 4 conveying device.

Furthermore, the sludge storage bin is a common steel bin or a concrete sludge storage pool.

Further, the mixing and tempering device is a solid-liquid mixing tank with a stirring device.

Further, the filter pressing device is a plate and frame filter press or a belt filter press.

Further, the No. 1 drying and dewatering device is a roller drying device, a belt drying device or a disc drying device.

Further, the No. 1 pyrolysis device and the No. 2 pyrolysis device are both roller type indirect pyrolysis furnaces.

Further, the # 1 cooling device and the # 2 cooling device are respectively and independently a drum-type indirect cooling device or a spiral indirect cooling device.

Further, the finished product storage bin is a common steel bin or a concrete bin.

Further, the water treatment device is a common sewage treatment device.

Further, the 1# condensing device and the 2# condensing device are respectively and independently a tubular indirect cooling device or a direct spraying cooling device.

Further, the # 1 fan and the # 2 fan are respectively and independently a centrifugal fan or an axial flow fan.

Further, the crushing device is a shear type crusher.

The 2# drying and dehydrating device is drum-type drying equipment, fluidized drying equipment or belt-type drying equipment, and the drying mode is direct contact drying.

Further, the combustion chamber # 1, the combustion chamber # 2 and the combustion chamber # 3 are respectively and independently a natural gas incinerator or a gas incinerator.

Further, the tail gas purification device is a dry-method flue gas purification device or a wet-method flue gas purification device.

Further, the chimney is a steel chimney, a brick-concrete structure chimney or a concrete chimney.

Further, the No. 1 conveying device is a common slurry pump.

Further, the # 2 conveying device, the # 3 conveying device, the # 4 conveying device, the # 5 conveying device, the # 6 conveying device and the # 7 conveying device are respectively and independently a large-inclination-angle belt conveyor, a scraper conveyor, a bucket elevator, a screw conveyor or an air conveyor.

The utility model has the advantages as follows:

(1) the method has the advantages that the crop straws are introduced into the field of sludge treatment, the crop straw pyrolytic carbon is fully used for sludge dewatering conditioning, the dewatering efficiency is improved, pores and surface functional groups of the sludge activated carbon are regulated and controlled, and heavy metals are solidified, so that the performance index of the modified sludge biochar is greatly improved, the treatment cost of the sludge and the straws can be remarkably reduced, and the market competitiveness is enhanced.

(2) Fully realize crops straw resourceization and high-efficient utilization of energy, on the one hand, avoid the simply environmental problem such as "haze" that burns produced of crops straw, simultaneously, solve the present straw independent carbonization treatment energy and can't rationally effectively utilize the problem.

(3) The advantages of high carbon content and high heat value of the straws are fully exerted, the pyrolysis gas generated in the straw anaerobic pyrolysis process is combusted to serve as energy for straw anaerobic pyrolysis, solid-phase drying and solid-phase anaerobic pyrolysis, the flue gas generated by the solid-phase drying dehydration and the anaerobic pyrolysis serves as the energy for straw drying, the self-supply and high-efficiency utilization of system energy are realized, the energy self-supply problem of the whole process of the process is thoroughly realized, the clean production and circular economy concept is fully embodied, and the energy-saving and cost-reducing benefits are remarkable.

(4) Adopt the utility model provides a modified sludge pyrolytic carbon that device obtained can be used for improving soil property, has realized simultaneously with the target of "straw returning" and "mud resourceization", has fully embodied "circular economy" theory.

Drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings will be briefly described below, and it is to be understood that the drawings in the following description are only related to some embodiments of the present invention, and are not intended to limit the present invention.

FIG. 1 is a schematic connection diagram of a device for co-processing straw and sludge provided by the present invention;

FIG. 2 is a process flow chart of the method corresponding to the device for the cooperative treatment of straw and sludge provided by the present invention.

Description of the reference numerals

1-sludge storage bin, 2-1# conveying device, 3-mixing tempering device, 4-filter pressing device, 5-2# conveying device, 6-1# drying and dewatering device, 7-3# conveying device, 8-1# pyrolysis device, 9-1# cooling device, 10-4# conveying device, 11-finished product storage bin, 12-sewage treatment device, 13-1# condensing device, 14-1# fan, 15-crushing device, 16-5# conveying device, 17-2# drying and dewatering device, 18-6# conveying device, 19-2# pyrolysis device, 20-2# cooling device, 21-7# conveying device, 22-1# combustion chamber, 23-2# combustion chamber, 24-3# combustion chamber, 25-2# condensing device, 26-2# blower, 27-tail gas purification device and 28-chimney.

Detailed Description

The present invention is described in detail below.

The straw mainly comprises C, H, O, is one of ideal raw materials for preparing the biochar material, is introduced into straw pyrolytic carbon and is subjected to mixed tempering and dehydration with sludge and then is pyrolyzed, so that the problem of insufficient energy self-sufficiency in the process of preparing the biochar by pyrolyzing the sludge can be solved, the quality of the biochar by the sludge can be improved, heavy metal is further deeply solidified, and the straw returning to the field and the sludge recycling are realized simultaneously through complementary advantages, so that the application prospect is good.

As shown in figure 1, the utility model provides a device for the straw and sludge coprocessing comprises a crushing device 15, a 2# drying and dehydrating device 17, a 2# pyrolysis device 19, a 2# cooling device 20, a mixing and tempering device 3, a filter pressing device 4, a 1# drying and dehydrating device 6, a 1# pyrolysis device 8, a 1# cooling device 9, a sewage treatment device 12, a 1# combustion chamber 22, a 2# combustion chamber 23 and a 3# combustion chamber 24; the outlet of the crushing device 15 is communicated with the inlet of the No. 2 drying and dehydrating device 17 through a No. 5 conveying device 16, the solid-phase outlet of the No. 2 drying and dehydrating device 17 is communicated with the inlet of the No. 2 pyrolyzing device 19 through a No. 6 conveying device 18, the solid-phase outlet of the No. 2 pyrolyzing device 19 is communicated with the No. 2 cooling device 20, the outlet of the No. 2 cooling device 20 is communicated with the inlet of the mixing and tempering device 3 through a No. 7 conveying device 21, the outlet of the mixing and tempering device 3 is communicated with the inlet of the filter pressing device 4, the solid-phase outlet of the filter pressing device 4 is communicated with the inlet of the No. 1 drying and dehydrating device 6 through a No. 2 conveying device 5 and the inlet of the sewage treatment device 12, the solid-phase outlet of the No. 1 drying and dehydrating device 6 is communicated with the inlet of the No. 1 pyrolyzing device 8 through a No. 3 conveying device 7, and the solid, 6 exhanst gas outlet of 1# stoving dewatering device and 8 exhanst gas outlet of 1# pyrolysis device all with 17 fuel inlets of 2# stoving dewatering device communicate, 19 gaseous phase outlets of 2# pyrolysis device respectively with 1# combustion chamber 22, 2# combustion chamber 23 and 24 gas inlets of 3# combustion chamber communicate, the energy that the combustion of 1# combustion chamber 22 produced is used for 1# stoving dewatering device 6, the energy that the combustion of 2# combustion chamber 23 produced is used for 1# pyrolysis device 8, the energy that the combustion of 3# combustion chamber 24 produced is used for 2# pyrolysis device 19.

Furthermore, the device for the co-processing of the straws and the sludge provided by the utility model also comprises a sludge storage bin 1, wherein the outlet of the sludge storage bin 1 is communicated with the inlet of the mixing and tempering device 3 through a No. 1 conveying device 2; and/or the device further comprises a # 1 condensing device 13, a water vapor outlet of the # 1 drying and dehydrating device 6 is communicated with an inlet of the # 1 condensing device 13, a liquid outlet of the # 1 condensing device 13 is communicated with an inlet of the sewage treatment device 12, and a gas outlet is communicated with an inlet of the # 1 combustion chamber 22 through a # 1 fan 14; and/or the system further comprises a 2# condensing device 25, a tail gas purification device 27 and a chimney 28, wherein the flue gas outlet of the 2# drying dehydration device 17 is communicated with the inlet of the 2# condensing device 25, the outlet of the 2# condensing device 25 is communicated with the inlet of the tail gas purification device 27 through a 2# fan 26, and the outlet of the tail gas purification device 27 is communicated with the inlet of the chimney 28; and/or the finished product storage bin 11 is further included, and an outlet of the No. 1 cooling device 9 is communicated with an inlet of the finished product storage bin 11 through a No. 4 conveying device 10.

In the utility model, the outlet of the 2# pyrolysis device 19 pyrolysis gas is respectively communicated with the gas inlets of the 1# combustion chamber 22, the 2# combustion chamber 23 and the 3# combustion chamber 24; the energy generated by the combustion of the 1# combustion chamber 22, the 2# combustion chamber 23 and the 3# combustion chamber 24 is respectively used for the 1# drying and dehydrating device 6, the 1# pyrolysis device 8 and the 2# pyrolysis device 19; and the flue gas generated by the No. 1 drying and dehydrating device 6 and the No. 1 pyrolysis device 8 is gathered and then is introduced into the No. 2 drying and dehydrating device 17.

When the straw drying device works, straws are crushed by the crushing device 15 and conveyed into the No. 2 drying and dehydrating device 17 by the No. 5 conveying device 16 to be directly dried; the flue gas generated by the No. 2 drying and dehydrating device 17 is condensed and cooled in a No. 2 condensing device 25, and the moisture is recovered; meanwhile, the condensed flue gas is conveyed into a tail gas purification device 27 through a No. 2 fan 26 for tail gas purification treatment, and the purified flue gas tail gas reaching the standard is discharged from a chimney 28. Conveying the dried straws into a No. 2 pyrolysis device 19 for anaerobic pyrolysis and carbonization by a No. 6 conveying device 18, and cooling the obtained straw pyrolysis carbon in a No. 2 cooling device 20; the cooled straw pyrolytic carbon is conveyed into the mixing and tempering device 3 by a 7# conveying device 21 for sludge tempering and dewatering. The sludge in the sludge storage bin 1 is conveyed into a mixing and tempering device 3 by a No. 1 conveying device 2, is mixed and tempered with the straw pyrolytic carbon conveyed by a No. 7 conveying device 21, and then enters a filter pressing device 4 for filter pressing; the liquid obtained by filter pressing enters a sewage treatment device 12 for treatment and then is discharged after reaching the standard; inputting the solid obtained by filter pressing into a No. 1 drying and dehydrating device 6 from a No. 2 conveying device 5 for indirect drying and dehydrating treatment; the water vapor generated by indirect drying and dehydration enters a No. 1 condensing device 13, the condensed water enters a sewage treatment device 12 for treatment and then is discharged after reaching the standard, and the non-condensable gas is conveyed to enter a No. 1 combustion chamber 22 through a No. 1 fan 14 to be used as combustion supplementary air, so that deodorization treatment is realized; the dried and dehydrated mud cakes are conveyed by a 3# conveying device 7 to enter a 1# pyrolysis device 8 for pyrolysis treatment, the obtained high-temperature sludge pyrolytic carbon enters a 1# cooling device 9 for cooling, and the obtained cooled sludge pyrolytic carbon is conveyed by a 4# conveying device 10 to enter a finished product storage bin 11 for storage and is used for resource utilization such as subsequent soil improvement. A part of high-quality pyrolysis gas generated by the pyrolysis of the straws in the 2# pyrolysis device 19 is combusted in the 3# combustion chamber 24 and then is used for the anaerobic pyrolysis carbonization of the straws in the 2# pyrolysis device 19; one part of the abundant pyrolysis gas is combusted in the 1# combustion chamber 22 and then used for indirectly drying the sludge in the 1# drying and dehydrating device 6, and the other part of the abundant pyrolysis gas enters the 2# combustion chamber 23 and is combusted for supplying energy for pyrolyzing the sludge in the 1# pyrolysis device 8, so that the problem of insufficient energy in the sludge treatment process is solved. 1# stoving dewatering device 6 and 1# pyrolysis device 8 are indirect flue gas heating, and produced flue gas tail gas is sent into 2# stoving dewatering device 17 and is used for the direct stoving of straw, realizes on the one hand that the further resource utilization of waste heat complementary energy, and on the other hand utilizes the peculiar absorption purification ability of straw living beings, realizes the preliminary purification treatment of flue gas.

From the matter cycle: straw pyrolytic carbon generated by drying and pyrolyzing straws is used as a conditioner for sludge dehydration, and is converted into high-quality sludge biochar through drying, dehydration and pyrolysis carbonization procedures, so that the carbon content in the sludge biochar is increased, and the porosity is increased; on the other hand, the heavy metal in the sludge is further solidified, and the content of the heavy metal in the sludge biochar is obviously reduced. The sludge biochar can be used as a soil conditioner, so that the straw and sludge can be recycled. From the energy perspective: the heat value of the straws is high, the pyrolysis gas can be used for self pyrolysis of the straws, one part of the abundant pyrolysis gas is used for indirectly drying the sludge, and the other part of the abundant pyrolysis gas is used for supplementing energy for pyrolysis of the sludge, so that the problem of insufficient energy in the sludge treatment process is solved, and the sludge treatment cost is obviously reduced. Meanwhile, the tail gas of the flue gas is used as an energy medium for drying and dehydrating the straws, on one hand, the further resource utilization of waste heat and residual energy is realized, on the other hand, the special adsorption and purification capacity of the straw biomass is utilized, the primary purification treatment of the flue gas is realized, and the concept of energy conservation and environmental protection is fully embodied.

The utility model discloses in, mud storage silo 1 can be ordinary steel storehouse or concrete mud storage pond.

The utility model discloses in, mix quenching and tempering device 3 can be for taking agitating unit's solid-liquid mixing jar.

The utility model discloses in, filter pressing device 4 can be plate and frame filter press or belt filter press.

The utility model discloses in, 1# stoving dewatering device 6 can be cylinder drying equipment, belt drying equipment or disc type drying equipment.

In the utility model discloses, 1# pyrolysis apparatus 8 with 2# pyrolysis apparatus 19 all can be the indirect pyrolysis oven of drum-type.

In the present invention, the 1# cooling device 9 and the 2# cooling device 20 may be a drum-type indirect cooling apparatus or a spiral indirect cooling apparatus, respectively and independently.

In the present invention, the finished product storage 11 may be a common steel silo or a concrete silo.

In the present invention, the water treatment device 12 may be a general sewage treatment device.

In the present invention, the 1# condensing unit 13 and the 2# condensing unit 25 may be each independently a shell and tube indirect cooling device or a direct spray cooling device.

In the present invention, the 1# fan 14 and the 2# fan 26 may be a centrifugal fan or an axial flow fan independently of each other.

In the present invention, the crushing device 15 may be a shear crusher.

The utility model discloses in 2# stoving dewatering device 17 can be drum-type drying equipment, fluidization drying equipment or belt drying equipment, and the stoving mode is direct contact stoving.

In the present invention, the # 1 combustion chamber 22, the # 2 combustion chamber 23 and the # 3 combustion chamber 24 may be a natural gas incinerator or a gas incinerator, respectively and independently.

In the present invention, the exhaust gas purification device 27 may be a dry or wet flue gas purification device.

In the present invention, the chimney 28 may be a steel chimney, a brick-concrete structure chimney, or a concrete chimney.

In the present invention, the 1# conveying device 2 may be a general slurry pump.

In the present invention, the 2# conveyor 5, the 3# conveyor 7, the 4# conveyor 10, the 5# conveyor 16, the 6# conveyor 18, and the 7# conveyor 21 may be a large-inclination belt conveyor, a scraper conveyor, a bucket elevator, a screw conveyor, or a pneumatic conveyor, respectively and independently.

As shown in figure 2, the method for using the device for the straw and sludge cooperative treatment provided by the utility model comprises the following steps:

(1) crushing and drying the straws in sequence to control the granularity of the straws to be less than 3cm and the water content to be less than 1 wt%, then carrying out anaerobic pyrolysis on the obtained dry crushed straws, and cooling to obtain straw pyrolytic carbon;

(2) mixing and tempering the straw pyrolytic carbon and the sludge, and then carrying out solid-liquid separation on the obtained mixed and tempered product by adopting a mechanical filter pressing mode to obtain a sludge solid phase and a sludge liquid phase; the sludge solid phase is dried and dehydrated, then is subjected to anaerobic pyrolysis, and is cooled to obtain modified sludge pyrolytic carbon which can be used as a soil conditioner; the liquid phase is subjected to sewage treatment by a sewage treatment device so as to be discharged after reaching the standard;

(3) and burning pyrolysis gas generated by the anaerobic pyrolysis of the dry-crushed straws to be used as energy sources for the anaerobic pyrolysis of the straws, the drying and dehydration of the solid phase of the sludge and the anaerobic pyrolysis of the solid phase of the sludge, and using flue gas generated by the drying and dehydration of the solid phase of the sludge and the anaerobic pyrolysis as energy sources for drying the straws (the part of the flue gas is subjected to standard emission after subsequent condensation and tail gas purification), thereby realizing the gradient utilization of energy.

The straw can be rice straw, corn straw or a mixture of the rice straw and the corn straw. Before the straw is subjected to anaerobic pyrolysis, the straw needs to be crushed and dried so as to control the particle size of the straw to be less than 3cm and control the water content to be less than 1 wt%. Wherein, the particles obtained after the straw is crushed are usually irregular, and in this case, the term "particle size" refers to the maximum distance between any two points in the straw particles. The drying mode is preferably direct drying of flue gas, and the drying temperature can be 80-180 ℃. The mode of anaerobic pyrolysis of the dry and crushed straws is preferably anaerobic indirect heating pyrolysis, the pyrolysis temperature is preferably 250-400 ℃, and the pyrolysis time is preferably 5-20 min.

The source of the sludge is not particularly limited, and may be, for example, wet sludge of a domestic sewage treatment plant. The water content of the sludge is preferably 85 wt% or more.

In the mixing and tempering process, the mixing proportion of the straw pyrolytic carbon and the sludge is preferably (20-40) wt% to (60-80) wt%. Straw pyrolytic carbon can reduce the electrostatic repulsion and the hydration between the mud granule, form infiltration, the lattice structure of fastness in mixing the dehydration process with mud, realize the quick broken wall of mud hydrothermal process's cell, quick release capillary water, adsorption water and inside water, reduce mud solid phase viscosity by a wide margin, greatly improve the dehydration nature to guaranteed the permeability of straining the looks in the follow-up dehydration process, improved the dehydration efficiency in solid-liquid separation stage, the drying efficiency of dehydration mud also can obtain obvious the improvement simultaneously.

In the step (2), the temperature for drying and dehydrating the sludge solid phase can be 80-120 ℃, and the time is based on the condition that the water content in a dried and dehydrated product is controlled to be less than 1 wt%. The mode of anaerobic pyrolysis of the sludge solid phase is preferably anaerobic indirect heating pyrolysis, the pyrolysis temperature is preferably 400-700 ℃, and the pyrolysis time is preferably 15-60 min. In addition, combustible gas generated by pyrolysis after drying and dewatering the solid phase can be used as self pyrolysis energy (the combustible gas similar to natural gas components generated by indirect pyrolysis of sludge can be used as self pyrolysis energy after being combusted, and the same is true for straw pyrolysis, but the heat value of the straw pyrolysis gas is higher, the yield is high, so that one part of the straw pyrolysis gas is used for self pyrolysis, and the other part of the straw pyrolysis gas can be used for sludge pyrolysis), and the energy synergistic utilization is realized (the pyrolysis gas generated by sludge pyrolysis is not enough to meet the energy required by self pyrolysis by 100% after being combusted).

Adopt the device provided by the utility model not only can avoid the environmental pollution problem that straw and mud caused completely, but also can solve present wasting of resources problem because of the mud landfill burns with the straw and causes, can also realize simultaneously that straw and mud innocent treatment process advantage are complementary, realize 100% resource recovery utilizes and 100% energy self-supply, have good economic benefits and environmental benefit.

The present invention will be described in detail below by way of examples.

In the following examples and comparative examples, "%" means weight percent, unless otherwise specified.

Example 1

A device for the synergistic treatment of straws and sludge comprises a sludge storage bin 1, a # 1 conveying device 2, a mixing and tempering device 3, a filter pressing device 4, a # 2 conveying device 5, a # 1 drying and dehydrating device 6, a # 3 conveying device 7, a # 1 pyrolysis device 8, a # 1 cooling device 9, a # 4 conveying device 10, a finished product storage bin 11, a sewage treatment device 12, a # 1 condensing device 13, a # 1 fan 14, a crushing device 15, a # 5 conveying device 16, a # 2 drying and dehydrating device 17, a # 6 conveying device 18, a # 2 pyrolysis device 19, a # 2 cooling device 20, a # 7 conveying device 21, a # 1 combustion chamber 22, a # 2 combustion chamber 23, a # 3 combustion chamber 24, a # 2 condensing device 25, a # 2 fan 26, a tail gas purification device 27 and a chimney 28.

When the device works, sludge in the sludge storage bin 1 is conveyed by the No. 1 conveying device 2 to enter the mixing and tempering device 3, and is mixed and tempered with straw pyrolytic carbon conveyed by the No. 7 conveying device 21, and then enters the filter pressing device 4 for filter pressing; the liquid obtained by filter pressing enters a sewage treatment device 12 for treatment and then is discharged after reaching the standard; inputting the solid obtained by filter pressing into a No. 1 drying and dehydrating device 6 from a No. 2 conveying device 5 for indirect drying and dehydrating treatment; the water vapor generated by indirect drying and dehydration enters a No. 1 condensing device 13, the condensed water enters a sewage treatment device 12 for treatment and then is discharged after reaching the standard, and the non-condensable gas is conveyed to enter a No. 1 combustion chamber 22 through a No. 1 fan 14 to be used as combustion supplementary air, so that deodorization treatment is realized; the dried and dehydrated mud cakes are conveyed by a 3# conveying device 7 to enter a 1# pyrolysis device 8 for pyrolysis treatment, the obtained high-temperature sludge pyrolytic carbon enters a 1# cooling device 9 for cooling, and the obtained cooled sludge pyrolytic carbon is conveyed by a 4# conveying device 10 to enter a finished product storage bin 11 for storage and is used for resource utilization such as subsequent soil improvement.

After being crushed by the crushing device 15, the straws are conveyed by the No. 5 conveying device 16 to enter the No. 2 drying and dehydrating device 17 for direct drying treatment of flue gas; the flue gas generated by the No. 2 drying and dehydrating device 17 is condensed and cooled in a No. 2 condensing device 25, and the moisture is recovered; meanwhile, the condensed flue gas is conveyed into a tail gas purification device 27 through a No. 2 fan 26 for tail gas purification treatment, and the purified flue gas tail gas reaching the standard is discharged from a chimney 28. Conveying the dried straws into a No. 2 pyrolysis device 19 for anaerobic pyrolysis and carbonization by a No. 6 conveying device 18, and cooling the obtained straw pyrolysis carbon in a No. 2 cooling device 20; the cooled straw pyrolytic carbon is conveyed into the mixing and tempering device 3 by a 7# conveying device 21 for sludge tempering and dewatering.

A part of high-quality pyrolysis gas generated by the pyrolysis of the straws in the 2# pyrolysis device 19 is combusted in the 3# combustion chamber 24 and then is used for the anaerobic pyrolysis carbonization of the straws in the 2# pyrolysis device 19; one part of the abundant pyrolysis gas is combusted in the 1# combustion chamber 22 and then used for indirectly drying the sludge in the 1# drying and dehydrating device 6, and the other part of the abundant pyrolysis gas enters the 2# combustion chamber 23 and is combusted for supplying energy for pyrolyzing the sludge in the 1# pyrolysis device 8, so that the problem of insufficient energy in the sludge treatment process is solved. 1# stoving dewatering device 6 and 1# pyrolysis device 8 are indirect flue gas heating, and produced flue gas tail gas is sent into 2# stoving dewatering device 17 and is used for the direct stoving of straw, realizes on the one hand that the further resource utilization of waste heat energy, and on the other hand utilizes the peculiar adsorption purification ability of straw living beings, realizes the preliminary purification treatment of flue gas.

From the matter cycle: straw pyrolytic carbon generated by drying and pyrolyzing straws is used as a conditioner for sludge dehydration, and is converted into high-quality sludge biochar through drying, dehydration and pyrolysis and carbonization procedures, so that the carbon content in the sludge biochar is improved on one hand, the porosity is improved, on the other hand, heavy metals in the sludge are further solidified, and the heavy metal risk of the sludge biochar is remarkably reduced. The sludge biochar can be used as a soil conditioner, so that the straw and sludge can be recycled.

From the energy perspective: the heat value of the straws is high, the pyrolysis gas can be used for self pyrolysis of the straws, one part of the abundant pyrolysis gas is used for indirectly drying the sludge, and the other part of the abundant pyrolysis gas is used for supplementing energy for pyrolysis of the sludge, so that the problem of insufficient energy in the sludge treatment process is solved, and the sludge treatment cost is obviously reduced. Meanwhile, the tail gas of the flue gas is used as an energy medium for drying and dehydrating the straws, on one hand, the further resource utilization of waste heat and residual energy is realized, on the other hand, the special adsorption and purification capacity of the straw biomass is utilized, the primary purification treatment of the flue gas is realized, and the concept of energy conservation and environmental protection is fully embodied.

Example 2

(1) The method comprises the following steps of sequentially crushing and drying rice straws to control the particle size of the rice straws to be less than 3cm and the water content to be less than 1 wt%, then carrying out anaerobic pyrolysis on the obtained dry crushed straws for 5min at 400 ℃, and cooling to obtain the straw pyrolytic carbon.

(2) Mixing and tempering the straw pyrolytic carbon and wet sludge of a domestic sewage treatment plant with the water content of 90 wt% according to the proportion of 20 wt% to 80 wt%, and then performing solid-liquid separation on the obtained mixed and tempered product in a mechanical filter pressing mode to obtain sludge solidA phase and a liquid phase; drying and dehydrating the sludge solid phase at 80 ℃ until the water content is 1 wt%, then carrying out anaerobic pyrolysis at 400 ℃ for 60min, and cooling to obtain modified sludge pyrolytic carbon which can be used as a soil conditioner; and the liquid phase is subjected to sewage treatment by a sewage treatment system so as to be discharged after reaching the standard. The result shows that compared with the sludge single dehydration and pyrolysis, the sludge dehydration efficiency is improved by 50%, the performance index of the modified sludge pyrolytic carbon can be obviously improved, wherein the carbon content in the modified sludge pyrolytic carbon is increased by 23%, and the pH value is increased from 8.36 to 8.96; (N + P)₂O₅The content of + K) is increased by 18.6%, the pore structure of the pyrolytic carbon is obviously improved (see table 1), and the leaching concentration of typical heavy metal TCLP is obviously reduced (see table 2).

TABLE 1 pore Structure analysis of pyrolytic carbon

Sample (I)	BET specific surface area (m)²/g)	Total pore volume (cm)³/g)	Average pore diameter (nm)
				Independent sludge dehydration pyrolysis	44.7959	0.0822	7.3406
Example 2	74.2685	0.0955	5.1440

TABLE 2 analysis of the leaching concentration of heavy metals in sludge and pyrolytic carbon

^aThe threshold is from USEPA 40CFR 261,1993 ed;^bND-represents not detected, the same applies below.

(3) And burning pyrolysis gas generated by the anaerobic pyrolysis of the dry-crushed straws to be used as energy sources for the anaerobic pyrolysis of the straws, the solid-phase drying of the sludge and the anaerobic pyrolysis of the solid phase of the sludge, and using flue gas generated by the drying dehydration of the solid phase of the sludge and the anaerobic pyrolysis as energy sources for the drying of the straws (the part of the flue gas is subjected to subsequent condensation and tail gas purification and then is discharged after reaching the standard), so that the energy gradient utilization is realized.

Example 3

(1) The method comprises the following steps of crushing and drying corn straws in sequence to control the particle size of the corn straws to be less than 3cm and the water content to be less than 1 wt%, then carrying out anaerobic pyrolysis on the obtained dry crushed straws for 20min at 250 ℃, and cooling to obtain the straw pyrolytic carbon.

(2) Mixing and tempering the straw pyrolytic carbon and wet sludge of a domestic sewage treatment plant with the water content of 90 wt% according to the proportion of 40 wt% to 60 wt%, and then performing solid-liquid separation on the obtained mixed and tempered product in a mechanical filter pressing mode to obtain a sludge solid phase and a sludge liquid phase; drying and dehydrating the sludge solid phase at 120 ℃ until the water content is 1 wt%, then carrying out anaerobic pyrolysis at 700 ℃ for 15min, and cooling to obtain modified sludge pyrolytic carbon which can be used as a soil conditioner; and the liquid phase is subjected to sewage treatment by a sewage treatment system so as to be discharged after reaching the standard. The result shows that compared with the sludge single dehydration and pyrolysis, the sludge dehydration efficiency is improved by 70%, the performance index of the modified sludge pyrolytic carbon can be obviously improved, wherein the carbon content in the modified sludge pyrolytic carbon is increased by 23%, and the pH value is increased from 8.36 to 8.93; (N + P)₂O₅The content of + K) is increased by 19.2%, the pore structure of the pyrolytic carbon is obviously improved (see table 3), and the leaching concentration of typical heavy metal TCLP is obviously reduced (see table 4).

TABLE 3 pore Structure analysis of pyrolytic carbon

Sample (I)	BET specific surface area (m)²/g)	Total pore volume (cm)³/g)	Average pore diameter (nm)
				Independent sludge dehydration pyrolysis	44.7959	0.0822	7.3406
Example 3	77.354	0.0885	5.2867

TABLE 4 analysis of the leaching concentration of heavy metals in sludge and pyrolytic carbon

Example 4

(1) The method comprises the following steps of sequentially crushing and drying rice straws to control the particle size of the rice straws to be less than 3cm and the water content to be less than 1 wt%, then carrying out anaerobic pyrolysis on the obtained dry crushed straws for 15min at 320 ℃, and cooling to obtain the straw pyrolytic carbon.

(2) Mixing and tempering the straw pyrolytic carbon and wet sludge of a domestic sewage treatment plant with the water content of 85 wt% according to the proportion of 30 wt% to 70 wt%, and then performing solid-liquid separation on the obtained mixed and tempered product in a mechanical filter pressing mode to obtain a sludge solid phase and a sludge liquid phase; drying and dehydrating the sludge solid phase at 100 ℃ until the water content is 1 wt%, then carrying out anaerobic pyrolysis at 550 ℃ for 35min, and cooling to obtain modified sludge pyrolytic carbon which can be used as a soil conditioner; and the liquid phase is subjected to sewage treatment by a sewage treatment system so as to be discharged after reaching the standard. The result shows that compared with the sludge single dehydration and pyrolysis, the sludge dehydration efficiency is improved by 70%, the performance index of the modified sludge pyrolytic carbon can be obviously improved, wherein the carbon content in the modified sludge pyrolytic carbon is increased by 23%, and the pH value is increased from 8.36 to 8.85; (N + P)₂O₅The content of + K) is increased by 28%, the pore structure of the pyrolytic carbon is obviously improved (see table 5), and the leaching concentration of typical heavy metal TCLP is obviously reduced (see table 6).

TABLE 5 pore Structure analysis of pyrolytic carbon

Sample (I)	BET specific surface area (m)²/g)	Total pore volume (cm)³/g)	Average pore diameter (nm)
				Independent sludge dehydration pyrolysis	44.7959	0.0822	7.3406
Example 4	117.2197	0.1168	3.9844

TABLE 6 analysis of the leaching concentration of heavy metals in sludge and pyrolytic carbon

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims

1. A device for the cooperative treatment of straws and sludge is characterized by comprising a crushing device (15), a 2# drying and dehydrating device (17), a 2# pyrolysis device (19), a 2# cooling device (20), a mixing and tempering device (3), a filter pressing device (4), a 1# drying and dehydrating device (6), a 1# pyrolysis device (8), a 1# cooling device (9), a sewage treatment device (12), a 1# combustion chamber (22), a 2# combustion chamber (23) and a 3# combustion chamber (24); the outlet of the crushing device (15) is communicated with the inlet of the No. 2 drying and dehydrating device (17) through a No. 5 conveying device (16), the solid-phase outlet of the No. 2 drying and dehydrating device (17) is communicated with the inlet of the No. 2 pyrolyzing device (19) through a No. 6 conveying device (18), the solid-phase outlet of the No. 2 pyrolyzing device (19) is communicated with the No. 2 cooling device (20), the outlet of the No. 2 cooling device (20) is communicated with the inlet of the mixing and tempering device (3) through a No. 7 conveying device (21), the outlet of the mixing and tempering device (3) is communicated with the inlet of the filter pressing device (4), the solid-phase outlet of the filter pressing device (4) is communicated with the inlet of the No. 1 drying and dehydrating device (6) through a No. 2 conveying device (5), the liquid-phase outlet of the filter pressing device (4) is communicated with the inlet of the sewage treatment device (12), the solid-phase outlet of the No. 1 drying and dehydrating device (6) is communicated, the utility model provides a 1# pyrolysis device (8) solid phase outlet with 1# cooling device (9) entry intercommunication, 1# stoving dewatering device (6) exhanst gas outlet and 1# pyrolysis device (8) exhanst gas outlet all with 2# stoving dewatering device (17) fuel inlet intercommunication, 2# pyrolysis device (19) gaseous phase outlet respectively with 1# combustion chamber (22), 2# combustion chamber (23) and 3# combustion chamber (24) gas entry intercommunication, the energy that 1# combustion chamber (22) burning produced is used for 1# stoving dewatering device (6), the energy that 2# combustion chamber (23) burning produced is used for 1# pyrolysis device (8), the energy that 3# combustion chamber (24) burning produced is used for 2# pyrolysis device (19).

2. The device for the straw and sludge co-processing according to claim 1, further comprising a sludge storage bin (1), wherein an outlet of the sludge storage bin (1) is communicated with an inlet of the mixing and tempering device (3) through a No. 1 conveying device (2); and/or the device also comprises a No. 1 condensing device (13), wherein a water vapor outlet of the No. 1 drying and dehydrating device (6) is communicated with an inlet of the No. 1 condensing device (13), a liquid outlet of the No. 1 condensing device (13) is communicated with an inlet of the sewage treatment device (12), and a gas outlet is communicated with an inlet of the No. 1 combustion chamber (22) through a No. 1 fan (14); and/or the system also comprises a 2# condensing device (25), a tail gas purification device (27) and a chimney (28), wherein the flue gas outlet of the 2# drying and dehydrating device (17) is communicated with the inlet of the 2# condensing device (25), the outlet of the 2# condensing device (25) is communicated with the inlet of the tail gas purification device (27) through a 2# fan (26), and the outlet of the tail gas purification device (27) is communicated with the inlet of the chimney (28); and/or the finished product storage bin (11) is further included, and an outlet of the No. 1 cooling device (9) is communicated with an inlet of the finished product storage bin (11) through a No. 4 conveying device (10).

3. The straw and sludge co-processing device according to claim 2, wherein the mixing and tempering device (3) is a solid-liquid mixing tank with a stirring device; the filter pressing device (4) is a plate-and-frame filter press or a belt filter press.

4. The straw and sludge co-processing device according to claim 2, wherein the No. 1 pyrolysis device (8) and the No. 2 pyrolysis device (19) are both roller type indirect pyrolysis furnaces.

5. The straw and sludge co-processing device according to claim 2, wherein the No. 1 cooling device (9) and the No. 2 cooling device (20) are respectively and independently a drum-type indirect cooling device or a spiral indirect cooling device; the 1# condensing device (13) and the 2# condensing device (25) are respectively and independently a tubular indirect cooling device or a direct spray cooling device.

6. The straw and sludge co-processing device according to claim 2, wherein the crushing device (15) is a shear crusher.

7. The straw and sludge co-processing device according to claim 2, wherein the No. 1 drying and dewatering device (6) is a drum drying device, a belt drying device or a disc drying device; the No. 2 drying and dehydrating device (17) is drum-type drying equipment, fluidized drying equipment or belt-type drying equipment, and the drying mode is direct contact drying.

8. The straw and sludge co-processing device according to claim 2, wherein the No. 1 combustion chamber (22), the No. 2 combustion chamber (23) and the No. 3 combustion chamber (24) are respectively and independently a natural gas incinerator or a gas incinerator.

9. The device for the straw and sludge cooperative treatment according to claim 2,

the sludge storage bin (1) is a common steel bin or a concrete sludge storage pool;

the finished product storage bin (11) is a common steel bin or a concrete bin;

the sewage treatment device (12) is a common sewage treatment device;

the No. 1 fan (14) and the No. 2 fan (26) are respectively and independently a centrifugal fan or an axial flow fan;

the tail gas purification device (27) is a dry-method flue gas purification device or a wet-method flue gas purification device;

the chimney (28) is a steel chimney, a brick-concrete structure chimney or a concrete chimney.

10. The device for the straw and sludge cooperative treatment according to claim 2,

the No. 1 conveying device (2) is a common slurry pump;

the No. 2 conveying device (5), the No. 3 conveying device (7), the No. 4 conveying device (10), the No. 5 conveying device (16), the No. 6 conveying device (18) and the No. 7 conveying device (21) are respectively and independently a large-inclination-angle belt conveyor, a scraper conveyor, a bucket elevator, a screw conveyor or an air conveyor.