Soil injection system

A fluid injecting system for injecting fluid into soil, the system comprising

• a tank for receiving and from which is discharged the fluid,
• mixing means in the tank for mixing the fluid, the mixing means comprising apparatus for supplying compressed air into the tank to facilitate fluid mixing therein and having a manifold with multiple air escape holes, the manifold extending along a substantial portion of an interior bottom of the tank,
• a transfer pump in fluid communication with the mixing tank,
• a pressure pump, the transfer pump in fluid communication with the pressure pump for pumping fluid to sequence pumping means,
• sequencing pumping means for providing sequential pulses of fluid to a nozzle apparatus,
• nozzle apparatus with at least one nozzle through which fluid is injected into the soil, the sequencing pumping means in fluid communication with the nozzle apparatus,
• pneumatic control apparatus for pneumatically controlling rate of pulsation of the pulses, the apparatus for supplying compressed air into the tank also providing compressed air for the pneumatic control apparatus,
• the pneumatic control apparatus comprising a control diaphragm on a sequencing control valve, and a regulator for adjustably supplying compressed air to the control diaphragm to regulate the rate of pulsation,
• accumulator apparatus for accumulating a charge of fluid pumped thereto from the pressure pump, and
• the sequencing pumping means having sensing apparatus to sense a pressure level of the charge of fluid in the accumulator, and the sequencing pumping means having opening apparatus which opens when a pre-set pressure level of the charge of fluid is sensed, permitting the charge of fluid to flow to the nozzle apparatus.

A method for injecting fluid into soil, the method comprising

• introducing fluid into a tank,
• mixing the fluid in the tank,
• pumping the fluid from the tank to a pressure pump,
• pumping the fluid with the pressure pump to accumulator apparatus,
• accumulating in the accumulator apparatus a charge of fluid pumped thereto by the pressure pump,
• sensing with sensing apparatus in a sequencing pumping means a pressure level of the charge of fluid in the accumulator apparatus, the sequencing pumping means having opening apparatus which opens when a pre-set pressure level of the charge of fluid is sensed, permitting the charge of fluid to flow to the nozzle apparatus,
• providing sequential pulses of the fluid to nozzle apparatus with the sequencing pumping means, and
• injecting the fluid into the soil with the nozzle apparatus.