CN213295007U

CN213295007U - Desulfurization waste water removes hard system

Info

Publication number: CN213295007U
Application number: CN202022147504.XU
Authority: CN
Inventors: 徐忠明; 冯丽; 徐锋军; 邵卫东; 王亚赟
Original assignee: Hangzhou Wotesong Environmental Protection Technology Co ltd
Current assignee: Hangzhou Wotesong Environmental Protection Technology Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-05-28
Anticipated expiration: 2030-09-27

Abstract

The utility model relates to a desulfurization waste water removes hard technical field, specifically is a desulfurization waste water removes hard system, the device comprises a device body, the device body includes neutralization box, one side fixed mounting of neutralization box has the inlet tube, one side that the inlet tube was kept away from to neutralization box is equipped with the reaction box. The utility model discloses a calcium hydroxide, the sclerosis of removing of sodium hydroxide and sodium carbonate, the medicament consumption is littleer, cleaner health, the sludge volume still less, need not to throw the flocculating agent, the coagulant aid, the consumption of medicament has been reduced, also to the stifled risk of the dirt of follow-up membrane concentration system, the turbidity of product water, it all is superior to the depositing reservoir effluent to remain calcium magnesium concentration, it is equal to milipore filter product water to produce water, can directly be sent to rear end membrane concentration processing system, thereby shorten recovery system process, reduce investment cost and space, the compound of silicon and silicon itself is the colloid, the settling property is relatively poor, the tubular membrane is effective than traditional handicraft to the getting rid of silicon, the posture structure, small floor area, equipment integration is simple.

Description

Desulfurization waste water removes hard system

Technical Field

The utility model relates to a desulfurization waste water removes hard technical field, specifically is a desulfurization waste water removes hard system.

Background

Because the desulfurization wastewater generally contains a large amount of heavy metal ions, chloride, sulfate ions and salt, the pH value is generally between 5 and 6, and the quality of the desulfurization wastewater is weakly acidic. The commonly used desulfurization wastewater treatment process at present is a triple box and clarification process. The pH value is adjusted to 10.0 by adding Ca (OH)2 into the desulfurization wastewater, and 15 percent TMT solution is added, so that heavy metal ions (such as mercury, copper, iron, nickel, chromium and lead) are precipitated. And adding a flocculating agent and a coagulant aid, finally clarifying in a clarifying tank, and discharging or recycling the effluent after adjusting the pH value. The temporary hardness and the magnesium hardness in the desulfurization wastewater are removed due to the addition of Ca (OH)2, but the permanent hardness cannot be removed.

The conventional method for removing the permanent hardness of the desulfurization wastewater can be used for removing the permanent hardness by a lime soda process. And adding soda ash, a flocculating agent and a coagulant aid into the desulfurized wastewater subjected to the primary clarification in a reaction tank, and then enabling the effluent to automatically flow to a secondary clarification tank, so that Ca2+ in the desulfurized wastewater is precipitated in the form of CaCO 3. And discharging water after the secondary clarification tank, and removing the hardness of the desulfurization wastewater. But the adoption of the secondary clarification process results in long treatment flow of hardness removal of the desulfurization wastewater and more equipment; the addition amount of the flocculating agent and the coagulant aid is large, otherwise, the amount of the effluent suspension is high; the dosage is large, and the triple box treatment technology cannot achieve the expected treatment effect under the conditions of different loads of a power plant and variable water quality and quantity of the desulfurization wastewater; the solid-liquid separation of the clarification tank is not thorough, so that the sludge amount is large; because the clarifier has the defects of large occupied area and the like due to slow ascending flow velocity, a desulfurization wastewater hardness removal system is urgently needed to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a desulfurization wastewater hardness removal system, which aims to solve the problems that the prior most wastewater hardness removal provided by the background technology adopts a two-stage clarification process, so that the treatment flow for removing hardness of desulfurization wastewater is long and the number of devices is large; the addition amount of the flocculating agent and the coagulant aid is large, otherwise, the amount of the effluent suspension is high; the dosage is large, and the triple box treatment technology cannot achieve the expected treatment effect under the conditions of different loads of a power plant and variable water quality and quantity of the desulfurization wastewater; the solid-liquid separation of the clarification tank is not thorough, so that the sludge amount is large; the problem of large floor area of the clarification tank is caused by slow ascending speed of the clarification tank.

In order to achieve the above object, the utility model provides a following technical scheme: a desulfurization wastewater hardness removal system comprises a device body, wherein the device body comprises a neutralization box, one side of the neutralization box is fixedly provided with a water inlet pipe, one side of the neutralization box, which is far away from the water inlet pipe, is provided with a reaction box, one side of the inner wall of the neutralization box is fixedly provided with a first communicating pipe, the first communicating pipe is provided with a valve, one side of the first communicating pipe, which is far away from the neutralization box, extends into the reaction box, one side of the reaction box, which is far away from the neutralization box, is provided with a circulating concentration box, one side of the inner wall of the reaction box is fixedly provided with a second communicating pipe, the second communicating pipe is provided with a valve, one end of the second communicating pipe, which is far away from the reaction box, extends into the circulating concentration box, one side of the circulating concentration box is fixedly provided with a concentration circulating pump, the water inlet end of the concentration circulating pump extends into the, and install the valve on the conveyer pipe, the one end fixed mounting that the concentrated case of circulation was kept away from to the conveyer pipe has tubular filter membrane device, the concentrated case of circulation keeps away from one side of reaction box and is equipped with the callback case, one side fixed mounting of callback case has control panel, the play water outlet end fixed mounting of tubular filter membrane device has row material pipe, and arranges and install the valve on the material pipe, arrange the inside that the one end that tubular filter membrane device was kept away from to the material pipe extends to the callback case, the top fixed mounting of concentrated case of circulation has the ninth connecting pipe, the one end that the concentrated case of circulation was kept away from to the ninth connecting pipe and the play water outlet end fixed connection of tubular filter membrane device, install the valve on the ninth connecting pipe, all be equipped with rabbling mechanism on neutralization box, reaction box.

Preferably, an acid cleaning box is arranged between the inner sides of the reaction box and the back-adjusting box, an alkaline cleaning box is arranged on one side, close to the back-adjusting box, of the acid cleaning box, a first connecting pipe is fixedly arranged at the bottom end of the discharging pipe and communicated with the discharging pipe, a valve is arranged on the first connecting pipe, a second connecting pipe is fixedly arranged at the bottom end of the first connecting pipe and communicated with the first connecting pipe, a third connecting pipe is fixedly arranged at the bottom end of the second connecting pipe and communicated with the second connecting pipe, the bottom end of the third connecting pipe extends to the inside of the alkaline cleaning box, a fourth connecting pipe is fixedly arranged at the bottom end of the second connecting pipe and communicated with the second connecting pipe, the bottom end of the fourth connecting pipe extends to the inside of the acid cleaning box, and a fifth connecting pipe is fixedly arranged at the bottom end of the alkaline cleaning box, and the bottom of fifth connecting pipe extends to the outside that the case was washd to basicity, the bottom fixed mounting that the case was washd to acidity has the sixth connecting pipe, and the bottom of sixth connecting pipe extends to the outside that the case was washd to acidity, the bottom fixed mounting of fifth connecting pipe and sixth connecting pipe has the seventh connecting pipe, and the seventh connecting pipe is linked together with fifth connecting pipe and sixth connecting pipe, the seventh connecting pipe is close to the one end fixed mounting that the concentrated case of circulation has the scavenging pump, the play water end fixed mounting of scavenging pump has the eighth connecting pipe, and installs the valve on the eighth connecting pipe, the one end and the conveyer pipe fixed connection of scavenging pump are kept away from to the eighth connecting pipe, and the eighth connecting pipe is linked together with the conveyer pipe.

Preferably, one side fixed mounting of circulation concentrator tank has the sludge transfer pump, the mud end of advancing of sludge transfer pump extends to the inside of circulation concentrator tank, the play mud end fixed mounting of sludge transfer pump has the blow off pipe.

Preferably, the bottom ends of the neutralization tank and the reaction tank are inclined, and the neutralization tank, the reaction tank and the circulating concentration tank are made of carbon steel anticorrosive materials.

Preferably, the rabbling mechanism includes the motor, the top of neutralization case, reaction box, circulation concentrator box and recall case all is equipped with the motor, the bottom of motor all fixed mounting have the (mixing) shaft, and the bottom of (mixing) shaft extends to the inside of neutralization case, reaction box, circulation concentrator box and recall case respectively.

Preferably, the stirring shaft is sleeved with a lantern ring, and both sides of the lantern ring are fixedly provided with scrapers.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the method has the advantages that calcium hydroxide, sodium hydroxide and sodium carbonate are adopted for hardness removal, the medicament consumption is smaller, the method is cleaner and more sanitary, the sludge amount is less, flocculating agents and coagulant aids are not needed to be added, the medicament consumption is reduced, the pollution blockage risk to a subsequent membrane concentration system is avoided, the turbidity and the residual calcium and magnesium concentration of produced water are superior to those of effluent water of a clarification tank, the produced water ultrafiltration membrane is equal to produced water, and the produced water can be directly sent to a rear-end membrane concentration treatment system, so that the process flow of a recovery system is shortened, the investment cost and space are reduced, silicon and silicon compounds are colloid, the sedimentation performance is poor, the tubular membrane is effective in silicon removal compared with the traditional process, and is in a rack structure, small in floor area and.

2. Through being provided with rabbling mechanism, can stir waste water and medicament in neutralization case, reaction box, circulation concentrator box and the back-up incasement to let its intensive mixing.

Drawings

FIG. 1 is a schematic sectional view of the front view of the structure of the present invention;

FIG. 2 is a schematic sectional view of the recycling concentration tank according to the present invention;

FIG. 3 is a schematic front sectional view of the structure of the neutralizing tank of the present invention;

fig. 4 is a front view of the stirring mechanism of the present invention.

In the figure: 100. a device body; 110. a water inlet pipe; 111. a neutralization tank; 112. a reaction box; 113. a circulating concentration tank; 114. a concentration circulating pump; 115. a sludge delivery pump; 116. a tubular membrane filtration device; 117. calling back a box; 118. an acid cleaning tank; 119. an alkaline cleaning tank; 120. cleaning the pump; 121. a first communication pipe; 122. a second communicating pipe; 123. a delivery pipe; 124. a discharge pipe; 125. a first connecting pipe; 126. a second connecting pipe; 127. a third connecting pipe; 128. a fourth connecting pipe; 129. a fifth connecting pipe; 130. a sixth connecting pipe; 131. a seventh connecting pipe; 132. an eighth connecting pipe; 133. a ninth connecting pipe; 134. a blow-off pipe; 135. a control panel; 200. a stirring mechanism; 210. a motor; 211. a stirring shaft; 212. a collar; 213. a scraper.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides an embodiment:

a desulfurization wastewater hardness removal system comprises a device body 100, wherein a concentration circulating pump 114, a sludge conveying pump 115 cleaning pump 120 and a motor 210 which are used in the system are products which can be directly purchased in the market, the principle of the system is the prior art which is well known to a person skilled in the art, and the details are not repeated, the output end of a control panel 135 is respectively and electrically connected with the input ends of the four motors 210, the concentration circulating pump 114 and the sludge conveying pump 115 cleaning pump 120 through leads, the device body 100 comprises a neutralization box 111, a water inlet pipe 110 is fixedly arranged on one side of the neutralization box 111, a reaction box 112 is arranged on one side of the neutralization box 111 far away from the water inlet pipe 110, a first communicating pipe 121 is fixedly arranged on one side of the inner wall of the neutralization box 111, a valve is arranged on the first communicating pipe 121, one side of the first communicating pipe 121 far away from the neutralization box 111 extends to the inside of the reaction box 112, and a circulation concentration, a second communicating pipe 122 is fixedly installed on one side of the inner wall of the reaction box 112, a valve is installed on the second communicating pipe 122, one end of the second communicating pipe 122, which is far away from the reaction box 112, extends into the circulating concentration box 113, a concentration circulating pump 114 is fixedly installed on one side of the circulating concentration box 113, a water inlet end of the concentration circulating pump 114 extends into the circulating concentration box 113, a delivery pipe 123 is fixedly installed on a water outlet end of the concentration circulating pump 114, a valve is installed on the delivery pipe 123, a tubular filter membrane device 116 is fixedly installed on one end of the delivery pipe 123, which is far away from the circulating concentration box 113, a back-up box 117 is arranged on one side of the circulating concentration box 113, a control panel 135 is fixedly installed on one side of the back-up box 117, a discharge pipe 124 is fixedly installed on a water outlet end of the tubular filter membrane device 116, a valve is installed on the discharge pipe 124, a ninth connecting pipe 133 is fixedly installed at the top end of the circulating concentration tank 113, one end of the ninth connecting pipe 133, which is far away from the circulating concentration tank 113, is fixedly connected with the water outlet end of the tubular membrane device 116, a valve is installed on the ninth connecting pipe 133, stirring mechanisms 200 are all arranged on the neutralization tank 111, the reaction tank 112, the circulating concentration tank 113 and the return tank 117, when in use, desulfurization wastewater is conveyed into the neutralization tank 111 through the water inlet pipe 110, Ca (OH)2 is added into the neutralization tank 111 to enable the pH value of the desulfurization wastewater to be about 10.5, the valve on the first connecting pipe 121 is opened to enable the wastewater in the neutralization tank 111 to automatically flow to the reaction tank 112, NaOH is added into the reaction tank 112 to effectively reduce the adding amount of Ca (OH)2 to enable the adding amount to be not excessive and the generated sludge amount to be less, NaCO3 is added into the reaction tank 112 to form calcium carbonate, then the valve on the reaction tank 112 is screwed to enable the desulfurization wastewater after adding of the chemicals to automatically flow into, and the concentration circulating pump 114 is started to convey the desulfurization wastewater into the component of the tubular filter membrane device 116 through the conveying pipe 123, the produced water of the tubular filter membrane device 116 automatically flows into the callback box 117, and after the pH value is added under the acid condition, the subsequent treatment membrane concentration treatment process is conveyed, because the hardness removal of calcium hydroxide, sodium hydroxide and sodium carbonate is adopted, the medicament consumption is smaller, the cleaning and sanitation are realized, the sludge amount is less, a flocculating agent and a coagulant aid are not required to be added, the medicament consumption is reduced, the pollution blockage risk of the subsequent membrane concentration system is reduced, the turbidity and the residual calcium and magnesium concentration of the produced water are superior to those of the effluent of a clarification tank, the produced water is equal to the produced water of an ultrafiltration membrane and can be directly conveyed to the rear-end membrane concentration treatment system, the process flow of the recovery system is shortened, the investment cost and the space are reduced, the compound of silicon and silicon is colloid per se, the sedimentation performance, the rack structure occupies a small area, and the equipment integration is simple.

Further, an acid cleaning tank 118 is arranged between the reaction tank 112 and the inner side of the back-adjusting tank 117, an alkaline cleaning tank 119 is arranged on one side of the acid cleaning tank 118 close to the back-adjusting tank 117, a first connecting pipe 125 is fixedly installed at the bottom end of the discharging pipe 124, the first connecting pipe 125 is communicated with the discharging pipe 124, a valve is installed on the first connecting pipe 125, a second connecting pipe 126 is fixedly installed at the bottom end of the first connecting pipe 125, the second connecting pipe 126 is communicated with the first connecting pipe 125, a third connecting pipe 127 is fixedly installed at the bottom end of the second connecting pipe 126, the third connecting pipe 127 is communicated with the second connecting pipe 126, the bottom end of the third connecting pipe 127 extends to the inside of the alkaline cleaning tank 119, a fourth connecting pipe 128 is fixedly installed at the bottom end of the second connecting pipe 126, the fourth connecting pipe 128 is communicated with the second connecting pipe 126, and the bottom end of the fourth connecting pipe 128 extends, a fifth connecting pipe 129 is fixedly installed at the bottom end of the alkaline cleaning tank 119, the bottom end of the fifth connecting pipe 129 extends to the outside of the alkaline cleaning tank 119, a sixth connecting pipe 130 is fixedly installed at the bottom end of the acidic cleaning tank 118, the bottom end of the sixth connecting pipe 130 extends to the outside of the acidic cleaning tank 118, a seventh connecting pipe 131 is fixedly installed at the bottom ends of the fifth connecting pipe 129 and the sixth connecting pipe 130, the seventh connecting pipe 131 is communicated with the fifth connecting pipe 129 and the sixth connecting pipe 130, a cleaning pump 120 is fixedly installed at one end of the seventh connecting pipe 131 close to the circulating concentration tank 113, an eighth connecting pipe 132 is fixedly installed at the water outlet end of the cleaning pump 120, a valve is installed on the eighth connecting pipe 132, one end of the eighth connecting pipe 132 far from the cleaning pump 120 is fixedly connected with the conveying pipe 123, and the eighth connecting pipe 132 is communicated with the conveying pipe 123, after the tubular filter, chemical cleaning is indispensable, divide into acid cleaning solution, alkaline cleaning solution, according to the stifled condition of dirt of tubular microfiltration membrane, start scavenging pump 120 through operation control panel 135, close the valve on the conveyer pipe 123, at this moment acid cleaning tank 118 and alkaline cleaning tank 119 in the washing solution gets into in the conveyer pipe 123 through eighth connecting pipe 132, thereby carry tubular filter membrane device 116 and wash the import, at this moment close the valve on arranging material pipe 124, make washing solution tubular filter membrane device 116 wash the export and flow to acid cleaning tank 118 and alkaline cleaning tank 119 in.

Furthermore, one side fixed mounting of circulation concentrator box 113 has sludge transfer pump 115, sludge transfer pump 115's the mud end of advancing extends to the inside of circulation concentrator box 113, sludge transfer pump 115's play mud end fixed mounting has blow off pipe 134, because circulation concentrator box 113 also accepts the dense water of tubular filter membrane device 116, the dense water of desulfurization waste water is concentrated in circulation concentrator box 113, the suspended solid can constantly rise, for the general TSS concentration of maintaining certain sludge concentration is 2-5%, set up sludge transfer pump 115 and carry the sludge in the circulation concentrator box 113 to the sludge dewatering system dehydration.

Furthermore, the bottom ends of the neutralization tank 111 and the reaction tank 112 are both inclined, and the neutralization tank 111, the reaction tank 112, and the circulation concentration tank 113 are made of carbon steel anticorrosive material, and the neutralization tank 111 and the reaction tank 112 are both inclined, so that the desulfurization wastewater can flow more smoothly.

Further, the stirring mechanism 200 includes a motor 210, the top ends of the neutralization tank 111, the reaction tank 112, the circulation concentration tank 113 and the returning tank 117 are all provided with the motor 210, the bottom ends of the motors 210 are all fixedly provided with stirring shafts 211, and the bottom ends of the stirring shafts 211 respectively extend to the interiors of the neutralization tank 111, the reaction tank 112, the circulation concentration tank 113 and the returning tank 117, so that wastewater and chemicals in the neutralization tank 111, the reaction tank 112, the circulation concentration tank 113 and the returning tank 117 can be stirred, and thus the wastewater and the chemicals can be sufficiently mixed.

Furthermore, all cup joints on the (mixing) shaft 211 and installs the lantern ring 212, and the both sides of lantern ring 212 are all fixed mounting has scraper blade 213, and when the (mixing) shaft 211 rotated, lantern ring 212 and neutralization box 111, reaction box 112, circulation concentrator box 113 and the inner wall of recalling case 117 laminated mutually to can drive the attachment on its inner wall and scrape off, thereby reduced the accumulational condition of raw materials and taken place.

The 114 concentration circulating pump and the 115 sludge delivery pump adopt chemical process pumps with open impellers and double-seal structures, the 114 concentration circulating pump adopts frequency conversion control, and the output can be selected to slowly rise and fall during starting and stopping, so that the impact of a water hammer on a membrane component is avoided; the circulating amount of the pump can be automatically adjusted according to the water production flow, the operation frequency of the pump can be reduced at the initial stage of operation, the operation frequency of the pump gradually rises along with the gradual reduction of the water production at the later stage, the acid cleaning solution adopts 5-10% hydrochloric acid, the alkali cleaning solution adopts 3-5% NaOH solution, the oxidant adopts mixed solution of 5-10% sulfuric acid and 3-5% H2O2 of acid solution or mixed solution of 5-15% NaOCl and 1-3% NaOH of alkali solution, and the organic pollution can be removed.

The working principle is as follows: when the device is used by a worker, firstly, the device is externally connected with a power supply, so as to provide electric power support for the device, when the device is used, incoming water of desulfurization wastewater is conveyed into a neutralization box 111 through a water inlet pipe 110, Ca (OH)2 is added into the neutralization box 111, so that the pH value of the desulfurization wastewater is about 10.5, a motor 210 is started through operating a control panel 135, then the motor 210 drives a stirring shaft 211 to rotate, so that Ca (OH)2, a flocculating agent and the desulfurization wastewater are fully mixed and reacted, a valve on a first connecting pipe 121 is opened, so that the wastewater in the neutralization box 111 automatically flows to a reaction box 112, NaOH is added into the reaction box 112, the adding amount of Ca (OH)2 can be effectively reduced, the excessive sludge is not excessive, the generated sludge is less, NaCO3 is added into the reaction box 112 to form calcium carbonate, then the valve on the reaction box 112 is screwed, so that the desulfurization wastewater after being added with the agent automatically flows into a circulating, and the concentration circulating pump 114 is started to convey the desulfurization wastewater into the components of the tubular filter membrane device 116 through the conveying pipe 123, the produced water of the tubular filter membrane device 116 automatically flows into the returning box 117, and after the pH value is subjected to an acid adding condition, the subsequent treatment membrane concentration treatment process is conveyed.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A desulfurization waste water removes hard system, includes device body (100), its characterized in that: the device body (100) comprises a neutralization tank (111), one side of the neutralization tank (111) is fixedly provided with a water inlet pipe (110), one side of the neutralization tank (111), far away from the water inlet pipe (110), is provided with a reaction tank (112), one side of the inner wall of the neutralization tank (111) is fixedly provided with a first communicating pipe (121), the first communicating pipe (121) is provided with a valve, one side of the first communicating pipe (121), far away from the neutralization tank (111), extends into the reaction tank (112), one side of the reaction tank (112), far away from the neutralization tank (111), is provided with a circulating concentration tank (113), one side of the inner wall of the reaction tank (112) is fixedly provided with a second communicating pipe (122), the second communicating pipe (122) is provided with a valve, one end of the second communicating pipe (122), far away from the reaction tank (112), extends into the circulating concentration tank (113), one side of the circulating concentration tank (113) is fixedly provided with a concentration circulating pump (114), and the end of intaking of concentrated circulating pump (114) extends to the inside of concentrated case (113) of circulation, the delivery pipe (123) is held fixed mounting to the play water outlet of concentrated circulating pump (114), and installs the valve on delivery pipe (123), the one end fixed mounting that concentrated case (113) of circulation was kept away from in delivery pipe (123) has tubular filter membrane device (116), the one side that reaction box (112) were kept away from in concentrated case (113) of circulation is equipped with back-off case (117), one side fixed mounting of back-off case (117) has control panel (135), the play water outlet fixed mounting of tubular filter membrane device (116) has row material pipe (124), and arranges and install the valve on the material pipe (124), the one end that tubular filter membrane device (116) was kept away from in row material pipe (124) extends to the inside of back-off case (117), the top fixed mounting of concentrated case (113) of circulation has ninth connecting pipe (, one end, far away from the circulating concentration tank (113), of the ninth connecting pipe (133) is fixedly connected with the water outlet end of the tubular filter membrane device (116), a valve is mounted on the ninth connecting pipe (133), and stirring mechanisms (200) are arranged on the neutralization tank (111), the reaction tank (112), the circulating concentration tank (113) and the returning tank (117).

2. The desulfurization waste water hardness removal system according to claim 1, wherein: be equipped with acid between the inboard of reaction box (112) and back-adjusting case (117) and wash case (118), one side that acid washing case (118) is close to back-adjusting case (117) is equipped with alkaline washing case (119), the bottom fixed mounting who arranges material pipe (124) has first connecting pipe (125), and first connecting pipe (125) is linked together with row material pipe (124), install the valve on first connecting pipe (125), the bottom fixed mounting of first connecting pipe (125) has second connecting pipe (126), and second connecting pipe (126) are linked together with first connecting pipe (125), the bottom fixed mounting of second connecting pipe (126) has third connecting pipe (127), and third connecting pipe (127) are linked together with second connecting pipe (126), the bottom of third connecting pipe (127) extends to the inside that alkaline washed case (119), the bottom fixed mounting of second connecting pipe (126) has fourth connecting pipe (128), and a fourth connecting pipe (128) is communicated with the second connecting pipe (126), the bottom end of the fourth connecting pipe (128) extends to the inside of the acid cleaning tank (118), a fifth connecting pipe (129) is fixedly installed at the bottom end of the alkaline cleaning tank (119), the bottom end of the fifth connecting pipe (129) extends to the outside of the alkaline cleaning tank (119), a sixth connecting pipe (130) is fixedly installed at the bottom end of the acid cleaning tank (118), the bottom end of the sixth connecting pipe (130) extends to the outside of the acid cleaning tank (118), seventh connecting pipes (131) are fixedly installed at the bottom ends of the fifth connecting pipe (129) and the sixth connecting pipe (130), the seventh connecting pipe (131) is communicated with the fifth connecting pipe (129) and the sixth connecting pipe (130), and a cleaning pump (120) is fixedly installed at one end of the seventh connecting pipe (131) close to the circulating concentration tank (113), the play water end fixed mounting of scavenging pump (120) has eighth connecting pipe (132), and installs the valve on eighth connecting pipe (132), the one end and conveyer pipe (123) fixed connection of scavenging pump (120) are kept away from in eighth connecting pipe (132), and eighth connecting pipe (132) are linked together with conveyer pipe (123).

3. The desulfurization waste water hardness removal system according to claim 1, wherein: one side fixed mounting of circulation concentrator box (113) has mud delivery pump (115), the mud end that advances of mud delivery pump (115) extends to the inside of circulation concentrator box (113), the play mud end fixed mounting of mud delivery pump (115) has blow off pipe (134).

4. The desulfurization waste water hardness removal system according to claim 1, wherein: the bottom ends of the neutralization tank (111) and the reaction tank (112) are both inclined, and the neutralization tank (111), the reaction tank (112) and the circulating concentration tank (113) are made of carbon steel anticorrosive materials.

5. The desulfurization waste water hardness removal system according to claim 1, wherein: rabbling mechanism (200) include motor (210), the top of neutralization case (111), reaction box (112), concentrated case of circulation (113) and recall case (117) all is equipped with motor (210), the bottom of motor (210) all fixed mounting have (mixing) shaft (211), and the bottom of (mixing) shaft (211) extends to the inside of neutralization case (111), reaction box (112), concentrated case of circulation (113) and recall case (117) respectively.

6. The desulfurization waste water hardness removal system according to claim 5, wherein: the stirring shaft (211) is sleeved with a sleeve ring (212), and both sides of the sleeve ring (212) are fixedly provided with scrapers (213).